WO2022116896A1

WO2022116896A1 - Path adjustment method and apparatus, and communication system

Info

Publication number: WO2022116896A1
Application number: PCT/CN2021/133374
Authority: WO
Inventors: 邰博; 吕金生; 刘兵社; 张如云; 方晟
Original assignee: 华为技术有限公司
Priority date: 2020-12-03
Filing date: 2021-11-26
Publication date: 2022-06-09
Also published as: CN114666261A

Abstract

The present application relates to the technical field of communications. Disclosed are a path adjustment method and apparatus, and a communication system. The path adjustment method comprises: a forwarding node adjusts a first forwarding path according to the fact that a bit error indicator of the first forwarding path does not satisfy a preset condition in the process of forwarding data by using the first forwarding path, for example, the forwarding node switches the first forwarding path to a second forwarding path, or the forwarding node reduces the transmission ratio of the data on the first forwarding path. In this way, the problem of low forwarding quality caused by forwarding at least part of data on the first forwarding path of which the bit error indicator does not satisfy the preset condition can be avoided or alleviated. The present application is used for path adjustment.

Description

Path adjustment method and device, and communication system

This application claims the priority of the Chinese patent application filed on December 03, 2020 with the application number of 202011412529.6 and the invention titled "Path Adjustment Method and Device, Communication System", the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of communication technologies, and in particular, to a path adjustment method and device, and a communication system.

Background technique

The communication system includes a controller, and a plurality of nodes to which the controller is connected. The controller can control the plurality of nodes to be forwarded along the path in the data tunnel.

For example, the controller may plan the data tunnel based on the network topology of the multiple nodes, and deliver the information of the data tunnel to the head node of the data tunnel. The head node can control the data to be forwarded to the tail node of the data tunnel along the path in the data tunnel according to the information of the data tunnel.

However, the path in the data tunnel is more likely to have a high bit error rate. If data is forwarded on a path with a high bit error rate, the quality of data forwarding will be low.

SUMMARY OF THE INVENTION

The present application provides a path adjustment method and device, and a communication system, which can solve the problem of low data forwarding quality. The technical solution is as follows:

A first aspect provides a path adjustment method, the method includes: in the process of forwarding data by a forwarding node using a first forwarding path, according to the error index of the first forwarding path does not meet a preset condition, The first forwarding path is switched to the second forwarding path, or the transmission ratio of data on the first forwarding path is reduced. The forwarding node is a node on the first forwarding path.

It should be noted that the bit error indicator is an indicator related to bit errors, such as the bit error rate in the usual sense or the bit error indicator obtained by deforming a simple formula based on the usual calculation method of the bit error rate, and another example is the occurrence of bit errors. the duration or the amount of errored data, etc. As a possible calculation method of the bit error index, the bit error rate is equal to the proportion of the number of bit errors in the total number of forwarded codes. Meeting the preset conditions and not meeting the preset conditions are relative, so meeting the preset conditions can also be naturally understood as not meeting a corresponding condition, and not meeting the preset conditions can also be naturally understood as meeting a corresponding condition. This is related to the setting content of the condition and the trigger mechanism of the condition. For example, taking the bit error indicator as the bit error rate as an example, when the preset condition is that the bit error rate is less than or equal to the bit error rate threshold, the forwarding node may, according to the bit error indicator of the first forwarding path not meeting the preset condition, convert the bit error rate to the first forwarding path. A forwarding path is switched to the second forwarding path; when the preset condition is that the bit error rate is greater than the bit error rate threshold, the forwarding node may switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path meeting the preset condition Two forwarding paths. It should be understood that, except for the situation described above, any other simple modifications to the error index and preset conditions do not affect the implementation of the solution of the present application, and therefore should be covered within the spirit of the inventive concept proposed in the present application.

In the path adjustment method provided by the present application, the forwarding node can switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path does not meet the preset condition, or reduce the data transmission rate on the first forwarding path. The transmission ratio is adjusted to realize the adjustment of the first forwarding path. Thereby, the problem of low forwarding quality caused by at least part of the data being forwarded on the first forwarding path whose bit error index does not meet the preset condition is avoided or alleviated. In addition, the forwarding node can adjust the first forwarding path without the aid of a controller. Therefore, the path adjustment method provided by the present application has higher efficiency in adjusting the path and stronger timeliness. Since the path adjustment process is allowed to be completed independently by the forwarding node, the load of the controller is also reduced, and the occurrence of the overload of the controller is avoided.

Optionally, the first forwarding path includes at least one error link, and the error link is a link with an error, and the second forwarding path does not include the at least one error link. one or more. Since the second forwarding path does not include one or more error links in the first forwarding path, the forwarding node can avoid data forwarding on the one or more error links by using the second forwarding path to forward data. Avoid or alleviate the situation of low forwarding quality caused by data forwarding on these erroneous links.

Optionally, the first forwarding path includes at least one bit error link, the bit error link is a link with bit errors, and the bit error index of the bit error link is called the bit error corresponding to the bit error link. index. The bit error indicator of the first forwarding path does not meet the preset condition, including: at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition. In this case, the forwarding node may first determine at least one error link in the first forwarding path. Optionally, the forwarding node may detect the error link on the first forwarding path based on a bidirectional forwarding detection (BFD) protocol. Afterwards, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition when the at least one error index corresponding to the at least one error link does not meet the preset condition.

Optionally, there may be multiple interpretations that the at least one error indicator does not meet the preset condition. For example, the at least one error index corresponding to the at least one error link does not meet the preset condition, including: the at least one error link. One or more of the bit error indicators do not meet the preset condition; or, the statistical value of at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition. Wherein, the statistical value of the at least one bit error indicator may be the cumulative sum, median, average or weighted average of the at least one bit error indicator, and the statistical value of the at least one bit error indicator may also be: the at least one bit error indicator In a bit error indicator, the number of bit error indicators that do not meet the indicator requirements, etc.

Optionally, the at least one bit error indicator is at least one bit error rate, and one or more of the at least one bit error indicator does not meet a preset condition, including: one or more of the at least one bit error rate. A plurality of bit error rate thresholds do not meet (for example, greater than the bit error rate threshold, or greater than or equal to the bit error rate threshold); or, the statistical value of at least one bit error indicator corresponding to the at least one bit error link The setting condition includes: the number of the at least one bit error rate that does not meet the bit error rate threshold exceeds a preset value, or the cumulative sum of the at least one bit error rate does not meet the preset value.

Optionally, the first forwarding path includes: one or more subpaths with the same head node and the same tail node, and the data that needs to be forwarded on the first forwarding path can be forwarded through any of these subpaths. , these subpaths can be used for load sharing. For example, the first forwarding path may be a candidate path (candidate path) in a segment routing policy (SRv6 policy) or a segment routing traffic engineering policy (SR-TE policy) based on Internet Protocol Version 6, and the candidate path includes at least one segment A routing list (segment list), the sub-path in the first forwarding path may be the data forwarding path indicated by the segment list in the candidate path. There may be at least one bit-error sub-path in the first forwarding path, and the bit-error sub-path is a sub-path with bit errors. The bit error indicator of the first forwarding path does not meet the preset condition, including: at least one bit error indicator corresponding to the at least one bit error sub-path does not meet the preset condition. In this case, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition according to the at least one error index corresponding to the at least one error sub-path does not meet the preset condition.

The at least one bit error indicator corresponding to the at least one bit error sub-path does not meet the preset condition, and it can be referred to that the at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition, which is not repeated in this application.

In the case that the first forwarding path includes at least one bit error sub-path, and the at least one bit error indicator corresponding to the at least one bit error sub-path does not meet the preset condition, the second forwarding path does not include the at least one error sub-path One or more of the codon paths. Since the second forwarding path does not include one or more bit error sub-paths in the first forwarding path, the forwarding node can avoid data forwarding on the one or more bit error sub-paths by using the second forwarding path to forward data, so it can avoid or Alleviate the situation of low forwarding quality caused by data forwarding on these bit-error subpaths.

Optionally, the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different data tunnels. When the first forwarding path and the second forwarding path belong to the same data tunnel, the forwarding node may switch the first forwarding path to the second forwarding path according to the routing policy for the data tunnel. When the first forwarding path and the second forwarding path belong to different data tunnels (for example, the first forwarding path belongs to the first data tunnel, and the second forwarding path belongs to the second data tunnel), the forwarding node can switch the first data tunnel to The second data tunnel is used to switch the data forwarding path from the first forwarding path to the second forwarding path.

Optionally, regardless of whether the first forwarding path belongs to a path in the data tunnel, the second forwarding path may be a path calculated by the forwarding node. At this time, the method may further include: before the forwarding node switches the first forwarding path to the second forwarding path, calculating the second forwarding path. For example, the second forwarding path is a path calculated by the forwarding node (for example, calculated based on an interior gateway protocol (Interior Gateway Protocol, IGP)). In this case, when the forwarding node determines that the bit error index of the first forwarding path does not meet the preset condition, it can calculate the second forwarding path, and then switch the first forwarding path to the second forwarding path. This process does not need to rely on Therefore, the timeliness of switching the first forwarding path to the second forwarding path is relatively high. Moreover, the forwarding node may be any node on the first forwarding path, such as a head node or an intermediate node. The second forwarding path may be a path in the data tunnel, or may not be a path in the data tunnel, which is not uniquely limited in this embodiment of the present application.

Optionally, when the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel, the second data tunnel may be a tunnel pre-configured for upper-layer services in the forwarding node, and the forwarding node determines When the bit error indicator of the first forwarding path does not meet the preset condition, the first data tunnel may be switched to the second data tunnel, so that the first forwarding path is switched to the second forwarding path. The upper layer service may be any service, such as a Layer 3 Virtual Private Network (Layer 3 Virtual Private Network, L3VPN) service and the like.

Optionally, when the first forwarding path belongs to a first data tunnel and the second forwarding path belongs to a second data tunnel, the second data tunnel may be a data tunnel planned by the controller. In this case, the method further includes: before switching the first forwarding path to the second forwarding path, the forwarding node sends a switching request message for requesting switching of the first data tunnel to the controller; after that , the forwarding node receives a handover response message from the controller, and the handover response message can be used to instruct to use the second data tunnel to forward the data; at this time, the forwarding node is switching the first forwarding path to the first forwarding path. When there are two forwarding paths, the first forwarding path may be switched to the second forwarding path in the second data tunnel to forward the data.

Optionally, the request message is a Border Gateway Protocol (Border Gateway Protocol, BGP) message.

Optionally, when determining that the bit error indicator of the first forwarding path does not meet the preset condition, the forwarding node may first adjust the first forwarding path based on the policy of the first data tunnel. When the bit error index of each data forwarding path in the first data tunnel is not below the preset condition, the forwarding node may switch the first data tunnel to the second data tunnel, so as to switch the first forwarding path in the first data tunnel Switch to the second forwarding path in the second data tunnel.

Optionally, the method further includes: the forwarding node sends an error message to the controller according to the error index of the first forwarding path not meeting a preset condition, where the error message is used to notify and communicate with the first forwarding path. Bit error information associated with the forwarding path. Exemplarily, the bit error information may include: a bit error indicator of the first forwarding path does not meet a preset condition, an errored link in the first forwarding path, and an errored link in the first forwarding path that does not meet the preset condition. , and/or, the adjustment status of the first forwarding path by the forwarding node (for example, the forwarding node switches the first forwarding path to the second forwarding path), etc. Since the forwarding node in the embodiment of the present application can notify the controller of the bit error information associated with the first forwarding path, the controller can forward the network topology of the node and the data laid out on multiple nodes according to the bit error information. Path management, and the controller can refer to the bit error information to lay out other data forwarding paths, so as to try to avoid that the bit error indicators of the other data forwarding paths laid out do not meet the preset conditions.

Optionally, the error message is a BGP message.

Optionally, the method further includes: the forwarding node obtains a path indication of one or more paths that are allowed to be adjusted, the one or more paths include: at least one path different from the first forwarding path; When switching the first forwarding path to the second forwarding path, the second forwarding path may be determined from the at least one path different from the first forwarding path according to the path indication, and the first forwarding path may be changed to the second forwarding path. A forwarding path is switched to the second forwarding path; when the forwarding node reduces the transmission ratio of data on the first forwarding path, the forwarding node may indicate the path from the at least one different from the first forwarding path according to the path. A third forwarding path is determined in the path, the transmission ratio of the data on the first forwarding path is reduced, and the transmission ratio of the data on the third forwarding path is increased. In the present application, whether the second forwarding path and the third forwarding path belong to the paths allowed to be adjusted can be set as required, so the flexibility of path adjustment can be improved.

Optionally, before adjusting the first forwarding path, the forwarding node may also determine whether the first forwarding path belongs to a path that allows adjustment, and only performs the first forwarding path when it is determined that the first forwarding path belongs to a path that allows adjustment. Adjustment. At this time, the method further includes: the forwarding node obtains a path indication of one or more paths that are allowed to be adjusted; when the forwarding node switches the first forwarding path to the second forwarding path, the forwarding node can adjust the path according to the one or more paths that are allowed to be adjusted. or multiple paths include the first forwarding path, and the first forwarding path is switched to the second forwarding path; when the forwarding node reduces the transmission ratio of the data on the first forwarding path, it can adjust according to the permission One or more of the paths include the first forwarding path, reducing the proportion of data transmission on the first forwarding path. When the first forwarding path has certain requirements on data forwarding quality, one or more paths that are allowed to be adjusted may include the first forwarding path; when the first forwarding path does not require data forwarding quality, one or more paths that are allowed to be adjusted The path may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node.

Optionally, the above path indication may be delivered by the controller to the forwarding node, may be delivered by other devices to the forwarding node, or may be configured locally by the forwarding node, which is not limited in this embodiment of the present application. When the path indication is issued by the controller to the forwarding node, the path indication is carried in the BGP message or the Path Computation Element Protocol (Path Computation Element Protocol, PCEP) message sent by the controller to the forwarding node. Optionally, the BGP message or the PCEP message may be a message for delivering a policy of the data tunnel.

Optionally, head nodes of the first forwarding path and the second forwarding path are the forwarding nodes, and tail nodes of the first forwarding path and the second forwarding path are the same. In other possible situations, it is not excluded that the head nodes and tail nodes of these forwarding paths may be different in some scenarios, but at least they can be associated based on some indication relationships, so that the forwarding node can determine that the first node can be A forwarding path is switched to the second forwarding path.

Optionally, the first forwarding path belongs to a path in the SRv6 policy or the SR-TE policy.

When switching the first forwarding path to the second forwarding path, the forwarding node may switch the first forwarding path to the second forwarding path in the SRv6 policy or the SR-TE policy, wherein the The first forwarding path and the second forwarding path are different candidate paths in the SRv6 policy or the SR-TE policy, or different segments in the same candidate path in the SRv6 policy or the SR-TE policy list instructions. It can be seen that when the first forwarding path is a certain candidate path in the first data tunnel, the forwarding node can switch the first forwarding path to another candidate path in the policy of the first data tunnel, so as to convert the first forwarding path to another candidate path in the policy of the first data tunnel. Switch to the second forwarding path. At this time, the first forwarding path and the second forwarding path are different candidate paths in the policy of the first data tunnel. Optionally, the second forwarding path may be a candidate path with the highest priority other than the first forwarding path in the first data tunnel.

When reducing the transmission ratio of data on the first forwarding path, the forwarding node may reduce the transmission ratio of data on the first forwarding path, and increase the candidate path that belongs to the same candidate path as the first forwarding path and is sent by other nodes. The proportion of the transmission of the data on one or more paths indicated by the segment list. It can be seen that when the first forwarding path is a data forwarding path indicated by a certain segment routing list in a candidate path in the first data tunnel, the forwarding node can switch the first forwarding path to another segment routing list in the candidate path. The indicated data forwarding path. In this case, the first forwarding path and the second forwarding path are data forwarding paths indicated by different segment routing lists in the same candidate path in the policy of the first data tunnel.

Optionally, after switching the first forwarding path to the second forwarding path, the forwarding node may also switch the second forwarding path back to the second forwarding path according to the code error indicator of the first forwarding path meeting a preset condition. the first forwarding path; or, after reducing the transmission ratio of data on the first forwarding path, the forwarding node may also restore the data in the first forwarding path according to the error index of the first forwarding path meeting a preset condition. A proportion of transmissions on a forwarding path.

Optionally, after switching the second forwarding path back to the original first forwarding path (or after restoring the transmission ratio of data on the first forwarding path), the forwarding node may also send a message to the controller for announcing the second forwarding path. The information of switching back to the first forwarding path (or restoring the transmission ratio of data on the first forwarding path), so that the controller can manage the network topology of the node and the data forwarding paths laid out on multiple nodes according to the information.

In a second aspect, a path adjustment method is provided, the method includes: a controller sends an indication message to a forwarding node, and the controller receives a bit error message sent by the forwarding node; wherein the indication message is used to indicate the The forwarding node determines to use the first forwarding path to forward data; the error message is used to announce the error information associated with the first forwarding path.

It should be noted that the controller can plan the first data tunnel according to the network topology between nodes, and deliver an instruction message for instructing to use the first data tunnel to forward data to the forwarding node. At this time, the forwarding node may be the head node of the data tunnel. The instruction message sent by the controller to the forwarding node may include: the policy of the first data tunnel (such as SRv6 policy or SR-TE policy). The strategy of the first data tunnel includes: multiple candidate paths, each candidate path includes multiple segment routing lists, and each segment routing list is used to indicate a data forwarding path. When the first data tunnel is an SR-TE policy tunnel, the segment routing list may be a list of labels of nodes on the data forwarding path indicated by the segment routing list. When the first data tunnel is an SRV6 policy tunnel, the segment routing list may be a list of Internet Protocol Version 6 (IPV6) addresses of nodes on the data forwarding path indicated by the segment routing list.

Since the forwarding node in the embodiment of the present application can notify the controller of the bit error information associated with the first forwarding path, the controller can forward the network topology of the node and the data laid out on multiple nodes according to the bit error information. Path management, and the controller can refer to the bit error information to lay out other data forwarding paths, so as to try to avoid that the bit error indicators of the other data forwarding paths laid out do not meet the preset conditions.

Optionally, the method further includes: after receiving the handover request message sent by the forwarding node, the controller sends a handover response message to the forwarding node according to the handover request message, where the handover response message is used to indicate The forwarding node determines to use a second forwarding path to forward the data, and the second forwarding path is a forwarding path determined to be used after the forwarding node switches the first forwarding path. When the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel, the second data tunnel may be a data tunnel planned by the controller. The forwarding node may determine the second data tunnel by means of the controller, and then switch the first forwarding path to the second forwarding path in the second data tunnel.

Optionally, the handover request message is a BGP message.

Optionally, the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different data tunnels; the second forwarding path is the forwarding path The node determines the used forwarding path after switching the first forwarding path. When the first forwarding path and the second forwarding path belong to the same data tunnel, the forwarding node may switch the first forwarding path to the second forwarding path according to the policy of the data tunnel (also referred to as a routing policy for the data tunnel). . When the first forwarding path and the second forwarding path belong to different data tunnels (for example, the first forwarding path belongs to the first data tunnel, and the second forwarding path belongs to the second data tunnel), the forwarding node can switch the first data tunnel to The second data tunnel is used to switch the data forwarding path from the first forwarding path to the second forwarding path.

Optionally, the method includes: the controller sends a path indication of one or more paths that allow adjustment to the forwarding node, so as to instruct the forwarding node to perform path adjustment according to the path indication. Before adjusting the first forwarding path, the forwarding node may also judge whether the second forwarding path belongs to one or more paths that are allowed to be adjusted. A forwarding path is switched to the second forwarding path. Before adjusting the first forwarding path, the forwarding node may further determine whether the first forwarding path belongs to the path that allows adjustment, and adjusts the first forwarding path only when it is determined that the first forwarding path belongs to the path that allows adjustment. In the present application, the controller can set the path that is allowed to be adjusted as required, so the flexibility of path adjustment can be improved. When the first forwarding path has certain requirements for data forwarding quality, one or more paths set by the controller that allow adjustment may include the first forwarding path; when the first forwarding path does not require data forwarding quality, the controller sets The one or more paths that are allowed to adjust may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node.

Optionally, the path indication is carried in the indication message. The indication message may be a BGP message or a PCEP message.

In a third aspect, a path adjustment apparatus is provided, the path adjustment apparatus includes: a forwarding module and a first adjustment module. Wherein, the forwarding module is used for forwarding data using the first forwarding path; the first adjustment module is used for switching the first forwarding path to the second forwarding path according to the error index of the first forwarding path does not meet a preset condition , or, reducing the transmission ratio of data on the first forwarding path, wherein the path adjusting device is a node on the first forwarding path.

The path adjustment device provided by the present application can switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path does not meet the preset condition, or reduce the transmission ratio of data on the first forwarding path, so as to The adjustment of the first forwarding path is implemented. Thus, the problem of low forwarding quality caused by at least part of the data being forwarded on the first forwarding path whose bit error index does not meet the preset condition is avoided or alleviated. In addition, the forwarding node can adjust the first forwarding path without the aid of a controller. Therefore, the path adjustment method provided by the present application has higher efficiency in adjusting the path and stronger timeliness. Moreover, since the path adjustment process is allowed to be completed independently by the forwarding node, the load of the controller is also reduced, and the occurrence of an excessively high load of the controller is avoided.

Optionally, the first forwarding path includes at least one error link, and the error link is a link with an error, and the second forwarding path does not include the at least one error link. one or more.

Optionally, the first forwarding path includes at least one bit error link, the bit error link is a link with bit errors, and the bit error index of the bit error link is called the bit error corresponding to the bit error link. index. The bit error indicator of the first forwarding path does not meet the preset condition, including: at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition.

Optionally, there may be multiple interpretations that the at least one error indicator does not meet the preset condition. For example, the at least one error index corresponding to the at least one error link does not meet the preset condition, including: the at least one error link. One or more of the bit error indicators do not meet the preset condition; or, the statistical value of at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition. Wherein, the statistical value of the at least one bit error indicator may be the cumulative sum, median, average or weighted average of the at least one bit error indicator, and the statistical value of the at least one bit error indicator may also be: the at least one bit error indicator The number of bit error indicators that do not meet the indicator requirements in a bit error indicator, etc., is not limited in this embodiment of the present application.

Optionally, the first forwarding path includes: one or more sub-paths with the same head node and the same tail node, and the data that needs to be forwarded on the first forwarding path can pass through any one of these sub-paths. Forwarding, these subpaths can be used for load sharing. For example, the first forwarding path may be a candidate path in the SRv6 policy or the SR-TE policy, the candidate path includes at least one segment list, and the sub-path in the first forwarding path may be the data forwarding path indicated by the segment list in the candidate path . There may be at least one bit-error sub-path in the first forwarding path, and the bit-error sub-path is a sub-path with bit errors. The bit error indicator of the first forwarding path does not meet the preset condition, including: at least one bit error indicator corresponding to the at least one bit error sub-path does not meet the preset condition. At this time, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition according to the at least one error index corresponding to the at least one error sub-path does not meet the preset condition.

In the case where the first forwarding path includes at least one error sub-path, and the at least one error indicator corresponding to the at least one error sub-path does not meet the preset condition, the second forwarding path does not include one of the at least one error sub-path or more. Since the second forwarding path does not include one or more bit error sub-paths in the first forwarding path, the forwarding node can avoid data forwarding on the one or more bit error sub-paths by using the second forwarding path to forward data, so it can avoid or Alleviate the situation of low forwarding quality caused by data forwarding on these bit-error subpaths.

Optionally, the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different data tunnels. When the first forwarding path and the second forwarding path belong to the same data tunnel, the first adjustment module in the path adjustment device may forward the first forwarding according to the policy of the data tunnel (also referred to as the routing policy for the data tunnel). The path is switched to the second forwarding path. When the first forwarding path and the second forwarding path belong to different data tunnels (for example, the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel), the first adjustment module may Switch to the second data tunnel, so that the data forwarding path is switched from the first forwarding path to the second forwarding path.

Optionally, the path adjustment apparatus further includes: a calculation module, configured to calculate (eg, calculate based on IGP) the second forwarding path. In this case, when the forwarding node determines that the bit error index of the first forwarding path does not meet the preset condition, it can calculate the second forwarding path, and then switch the first forwarding path to the second forwarding path, and this process does not need to rely on Therefore, the timeliness of switching the first forwarding path to the second forwarding path is relatively high. Moreover, the forwarding node may be any node on the first forwarding path, such as a head node or an intermediate node. The second forwarding path may be a path in the data tunnel, or may not be a path in the data tunnel, which is not limited in this embodiment of the present application.

Optionally, the first forwarding path belongs to a first data tunnel, the second forwarding path belongs to a second data tunnel, and the path adjustment apparatus further includes: a first sending module and a receiving module. The first sending module is configured to send a switching request message for requesting switching of the first data tunnel to the controller; the receiving module is configured to receive a switching response message from the controller, where the switching response message is used to indicate the use of The second data tunnel forwards the data; the first adjustment module is configured to: switch the first forwarding path to the second forwarding path in the second data tunnel to forward the data.

Optionally, the request message is a BGP message.

Optionally, the path adjustment device further includes: a second sending module, configured to send an error message to the controller according to the error index of the first forwarding path not meeting a preset condition, and the error message is used for for notifying bit error information associated with the first forwarding path. Exemplarily, the bit error information may include: a bit error indicator of the first forwarding path does not meet a preset condition, an errored link in the first forwarding path, and an errored link in the first forwarding path that does not meet the preset condition. , and/or, the adjustment status of the first forwarding path by the forwarding node (for example, the forwarding node switches the first forwarding path to the second forwarding path), etc. Since the forwarding node in the embodiment of the present application can notify the controller of the bit error information associated with the first forwarding path, the controller can forward the network topology of the node and the data laid out on multiple nodes according to the bit error information. Path management, and the controller can refer to the bit error information to lay out other data forwarding paths, so as to try to avoid that the bit error indicators of the other data forwarding paths laid out do not meet the preset conditions.

Optionally, the path adjustment apparatus includes: an obtaining module, configured to obtain a path indication of one or more paths that allow adjustment, the one or more paths include: at least one path different from the first forwarding path ; the first adjustment module is configured to: determine the second forwarding path from the at least one path different from the first forwarding path according to the path indication, and switch the first forwarding path to the the second forwarding path; or, determining a third forwarding path from the at least one path different from the first forwarding path according to the path indication, and reducing the transmission ratio of the data on the first forwarding path , and increase the transmission ratio of the data on the third forwarding path. In the present application, whether the second forwarding path and the third forwarding path belong to the paths allowed to be adjusted can be set as required, so the flexibility of path adjustment can be improved.

Optionally, the path adjustment device includes: an obtaining module configured to obtain a path indication of one or more paths that are allowed to be adjusted; the first adjustment module is configured to: according to the one or more paths allowed to be adjusted, include: For the first forwarding path, switch the first forwarding path to the second forwarding path; or, according to the allowable adjustment of one or more paths including the first forwarding path, reduce the amount of data to be forwarded in the first forwarding path. The transmission scale on the path. It can be seen that, before adjusting the first forwarding path, the forwarding node can also determine whether the first forwarding path belongs to the path that allows adjustment, and only performs the first forwarding path when it is determined that the first forwarding path belongs to the path that allows adjustment. Adjustment. When the first forwarding path has certain requirements on data forwarding quality, one or more paths that are allowed to be adjusted may include the first forwarding path; when the first forwarding path does not require data forwarding quality, one or more paths that are allowed to be adjusted The path may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node.

Optionally, the path indication is carried in a BGP message or a PCEP message sent by the controller to the path adjustment apparatus.

Optionally, head nodes of the first forwarding path and the second forwarding path are the path adjustment apparatus, and tail nodes of the first forwarding path and the second forwarding path are the same. In other possible situations, it is not excluded that the head nodes and tail nodes of these forwarding paths may be different in some scenarios, but at least they can be associated based on some indication relationships, so that the forwarding node can determine that the first node can be A forwarding path is switched to the second forwarding path.

Optionally, the first forwarding path belongs to a path in an SRv6 policy or an SR-TE policy, and the first adjustment module is configured to: switch the first forwarding path to the SRv6 policy or the SR-TE policy The second forwarding path in the policy, wherein the first forwarding path and the second forwarding path are different candidate paths in the SRv6 policy or the SR-TE policy, or are determined by the SRv6 policy or Different segment routing lists in the same candidate path in the SR-TE policy indicate; optionally, the second forwarding path may be a candidate path with the highest priority other than the first forwarding path in the first data tunnel . Or, the first adjustment module is configured to: reduce the transmission ratio of data on the first forwarding path, and increase one or more paths that belong to the same candidate path as the first forwarding path and are indicated by other segment lists The proportion of the data transmitted on the path. In this case, the first forwarding path and the second forwarding path are data forwarding paths indicated by different segment routing lists in the same candidate path in the policy of the first data tunnel.

Optionally, the path adjustment device further includes: a second adjustment module. The second adjustment module is configured to: switch the second forwarding path back to the first forwarding path according to the bit error index of the first forwarding path meeting a preset condition; or, according to the error of the first forwarding path If the bit error indicator meets the preset condition, the transmission ratio of the data on the first forwarding path is restored.

In a fourth aspect, a path adjustment apparatus is provided, and the path adjustment apparatus includes: a first sending module and a first receiving module. The first sending module is configured to send an instruction message to the forwarding node, where the instruction message is used to instruct the forwarding node to determine to use the first forwarding path to forward data; the first receiving module is configured to receive the error code sent by the forwarding node message, where the bit error message is used to announce bit error information associated with the first forwarding path. Since the forwarding node in this embodiment of the present application can notify the path adjustment apparatus of the bit error information associated with the first forwarding path, the path adjustment apparatus can, according to the bit error information, analyze the network topology of the node and the information about the network topology of the node, and the information about the code layout on multiple nodes. The data forwarding path is managed, and the path adjustment device can refer to the bit error information to lay out other data forwarding paths, so as to try to avoid that the bit error indicators of the other data forwarding paths laid out do not meet the preset conditions.

Optionally, the path adjustment apparatus further includes: a second receiving module, configured to receive a handover request message sent by the forwarding node; a second sending module, configured to send a handover request message to the forwarding node according to the handover request message A response message, where the switching response message is used to instruct the forwarding node to determine to use a second forwarding path to forward the data, and the second forwarding path is the forwarding path determined to be used by the forwarding node after switching the first forwarding path . It can be seen that when the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel, the second data tunnel may be a data tunnel planned by the path adjustment apparatus. The forwarding node may determine the second data tunnel by means of the path adjustment device, and then switch the first forwarding path to the second forwarding path in the second data tunnel.

Optionally, the handover request message is a BGP message.

Optionally, the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different data tunnels; the second forwarding path is the forwarding path The node determines the used forwarding path after switching the first forwarding path.

Optionally, the path adjustment apparatus includes: a third sending module, configured to send a path indication of one or more paths that allow adjustment to the forwarding node, so as to instruct the forwarding node to perform path adjustment according to the path indication . The path adjustment device in the present application can set a path that is allowed to be adjusted as required, so the flexibility of path adjustment can be improved. When the first forwarding path has certain requirements for data forwarding quality, one or more paths set by the path adjustment device that allow adjustment may include the first forwarding path; when the first forwarding path does not require data forwarding quality, the path adjustment One or more paths set by the device to allow adjustment may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node.

In a fifth aspect, a communication system is provided, the communication system includes: a plurality of nodes; at least some of the nodes in the plurality of nodes are located on a first forwarding path, and the forwarding node is any node on the first forwarding path. A node, for example, a path head node of a tunnel end device; the forwarding node is configured to: forward data using the first forwarding path; The forwarding path is switched to the second forwarding path, or the ratio of data transmission on the first forwarding path is reduced. Other nodes other than the forwarding node in the at least part of the nodes are configured to: receive data forwarded by the forwarding node according to the first forwarding path, or forward data to the forwarding node.

The forwarding node can switch the first forwarding path to the second forwarding path according to the fact that the error index of the first forwarding path does not meet the preset condition, or reduce the transmission ratio of data on the first forwarding path, so as to realize the forwarding of the first forwarding path. Path adjustment. Thus, the problem of low forwarding quality caused by at least part of the data being forwarded on the first forwarding path whose bit error index does not meet the preset condition is avoided or alleviated. In addition, the forwarding node can adjust the first forwarding path without the aid of a controller. Therefore, the path adjustment method provided by the present application has higher efficiency in adjusting the path and stronger timeliness. Moreover, since the path adjustment process is allowed to be completed independently by the forwarding node, the load of the controller is also reduced, and the occurrence of an excessively high load of the controller is avoided.

Optionally, the communication system further includes: a controller; the controller is configured to: send a path indication message to the forwarding node, and the forwarding node is configured to: determine to use the first forwarding path for forwarding according to the path indication message data.

In a sixth aspect, a communication system is provided, the communication system includes: a controller and a forwarding node; the controller is configured to: send a path indication message to the forwarding node; the forwarding node is configured to: After the message determines to use the first forwarding path to forward data, the first forwarding path is switched to the second forwarding path according to the error indicator of the first forwarding path does not meet the preset condition, or the data is reduced in the first forwarding path. A transmission ratio on a forwarding path, wherein the forwarding node is a node on the first forwarding path.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the first forwarding path includes at least one error link, the error link is a link with errors, and the second forwarding The path does not include one or more of the at least one errored link. Since the second forwarding path does not include one or more error links in the first forwarding path, the forwarding node can avoid data forwarding on the one or more error links by using the second forwarding path to forward data. Avoid or alleviate the situation of low forwarding quality caused by data forwarding on these erroneous links.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the first forwarding path includes at least one bit error link, the bit error link is a link with bit errors, and the bit error link is The bit error indicator is called the bit error indicator corresponding to the bit error link. The bit error indicator of the first forwarding path does not meet the preset condition, including: at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition. Optionally, the forwarding node may detect the error link on the first forwarding path based on the BFD protocol. Afterwards, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition when the at least one error index corresponding to the at least one error link does not meet the preset condition.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, there may be multiple interpretations that the at least one bit error indicator does not meet the preset condition, for example, at least one bit error corresponding to the at least one bit error link. The indicators do not meet the preset conditions, including: one or more of the at least one bit error indicators do not meet the preset conditions; or, the statistical value of the at least one bit error indicator corresponding to the at least one bit error link does not meet the requirements preset conditions. Wherein, the statistical value of the at least one bit error indicator may be the cumulative sum, median, average or weighted average of the at least one bit error indicator, and the statistical value of the at least one bit error indicator may also be: the at least one bit error indicator The number of bit error indicators that do not meet the indicator requirements in a bit error indicator, etc., is not limited in this embodiment of the present application.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the at least one bit error indicator is at least one bit error rate, and one or more of the at least one bit error indicator does not meet a preset condition, Including: one or more of the at least one bit error rate does not meet the bit error rate threshold (for example, greater than the bit error rate threshold, or greater than or equal to the bit error rate threshold); or, the at least one bit error link The statistical value of the corresponding at least one bit error index does not meet the preset condition, including: the number of the at least one bit error rate that does not meet the bit error rate threshold exceeds the preset value, or, the at least one bit error rate The accumulated sum does not meet the preset value.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the first forwarding path includes: one or more sub-paths with the same head node and the same tail node, which need to be forwarded on the first forwarding path. Data can be forwarded through any of these sub-paths, and these sub-paths can be used for load balancing. For example, the first forwarding path may be a candidate path in the SRv6 policy or the SR-TE policy, the candidate path includes at least one segment list, and the sub-path in the first forwarding path may be the data forwarding path indicated by the segment list in the candidate path . There may be at least one bit-error sub-path in the first forwarding path, and the bit-error sub-path is a sub-path with bit errors. The bit error indicator of the first forwarding path does not meet the preset condition, including: at least one bit error indicator corresponding to the at least one bit error sub-path does not meet the preset condition. In this case, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition according to the at least one error index corresponding to the at least one error sub-path does not meet the preset condition.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to the same data tunnel. Different data tunnels. When the first forwarding path and the second forwarding path belong to the same data tunnel, the forwarding node may switch the first forwarding path to the second forwarding path according to the policy of the data tunnel. When the first forwarding path and the second forwarding path belong to different data tunnels (for example, the first forwarding path belongs to the first data tunnel, and the second forwarding path belongs to the second data tunnel), the forwarding node can switch the first data tunnel to The second data tunnel is used to switch the data forwarding path from the first forwarding path to the second forwarding path.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, regardless of whether the first forwarding path belongs to a path in the data tunnel, the second forwarding path may be a path calculated by the forwarding node. At this time, the forwarding node is further configured to: calculate the second forwarding path. For example, the second forwarding path is a path calculated by the forwarding node (for example, calculated based on IGP). In this case, when the forwarding node determines that the bit error index of the first forwarding path does not meet the preset condition, it can calculate the second forwarding path, and then switch the first forwarding path to the second forwarding path. This process does not need to rely on Therefore, the timeliness of switching the first forwarding path to the second forwarding path is relatively high. Moreover, the forwarding node may be any node on the first forwarding path, such as a head node or an intermediate node. The second forwarding path may be a path in the data tunnel, or may not be a path in the data tunnel, which is not uniquely limited in this embodiment of the present application.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, when the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel, the second data tunnel may be forwarding. In the pre-configured tunnel of the upper-layer service in the node, when the forwarding node determines that the bit error index of the first forwarding path does not meet the preset condition, it can switch the first data tunnel to the second data tunnel, so that the first forwarding path is switched to The second forwarding path. The upper-layer service may be any service, such as an L3VPN service.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the first forwarding path belongs to a first data tunnel, and the second forwarding path belongs to a second data tunnel; the second data tunnel may be planned by the controller data tunnel. In this case, the forwarding node is further configured to: send a switching request message for requesting switching of the first data tunnel to the controller; the controller is further configured to: send the switching request message to the controller according to the switching request message The forwarding node sends a switching response message, where the switching response message is used to instruct to use the second data tunnel to forward the data; the forwarding node is used for: switching the first forwarding path to the second data tunnel the second forwarding path to forward the data.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the request message is a BGP message.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the forwarding node may be configured to adjust the first forwarding path. When the bit error index of each data forwarding path in the first data tunnel is not below the preset condition, the forwarding node can be used to switch the first data tunnel to the second data tunnel, so as to switch the first data tunnel in the first data tunnel The forwarding path is switched to the second forwarding path in the second data tunnel.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the forwarding node is further configured to: send an error message to the controller according to the error indicator of the first forwarding path not meeting a preset condition, The bit error message is used to announce bit error information associated with the first forwarding path. Exemplarily, the bit error information may include: a bit error indicator of the first forwarding path does not meet a preset condition, an errored link in the first forwarding path, and an errored link in the first forwarding path that does not meet the preset condition. , and/or, the adjustment status of the first forwarding path by the forwarding node (for example, the forwarding node switches the first forwarding path to the second forwarding path), etc. Since the forwarding node in the embodiment of the present application can notify the controller of the bit error information associated with the first forwarding path, the controller can forward the network topology of the node and the data laid out on multiple nodes according to the bit error information. Path management, and the controller can refer to the bit error information to lay out other data forwarding paths, so as to try to avoid that the bit error indicators of the other data forwarding paths laid out do not meet the preset conditions.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the forwarding node is configured to: obtain a path indication of one or more paths that allow adjustment, where the one or more paths include: at least one path with different forwarding paths; determining the second forwarding path from the at least one path different from the first forwarding path according to the path indication, and switching the first forwarding path to the a second forwarding path; or, determining a third forwarding path from the at least one path different from the first forwarding path according to the path indication, and reducing the transmission ratio of the data on the first forwarding path, and increase the transmission ratio of the data on the third forwarding path. In the present application, whether the second forwarding path and the third forwarding path belong to the paths allowed to be adjusted can be set as required, so the flexibility of path adjustment can be improved.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, before adjusting the first forwarding path, the forwarding node may also determine whether the first forwarding path belongs to a path that allows adjustment, and after determining that the first forwarding path belongs to The first forwarding path is adjusted only when the adjusted path is allowed. In this case, the forwarding node is configured to: obtain a path indication of one or more paths that are allowed to be adjusted; switch the first forwarding path according to the one or more paths that are allowed to be adjusted including the first forwarding path is the second forwarding path; or, one or more paths adjusted according to the permission include the first forwarding path, reducing the proportion of data transmission on the first forwarding path. When the first forwarding path has certain requirements on data forwarding quality, one or more paths that are allowed to be adjusted may include the first forwarding path; when the first forwarding path does not require data forwarding quality, one or more paths that are allowed to be adjusted The path may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the above-mentioned path indication may be issued by the controller to the forwarding node, or may be issued by other devices to the forwarding node, or may be configured locally by the forwarding node. Yes, this is not limited in the embodiments of the present application. When the path indication is delivered by the controller to the forwarding node, the path indication is carried in the BGP message or PCEP message sent by the controller to the forwarding node. Optionally, the BGP message or the PCEP message may be a message for delivering a policy of the data tunnel.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the head nodes of the first forwarding path and the second forwarding path are the forwarding nodes, and the first forwarding path and the second forwarding path are the forwarding nodes. The tail nodes of the forwarding path are the same. In other possible situations, it is not excluded that the head nodes and tail nodes of these forwarding paths may be different in some scenarios, but at least they can be associated based on some indication relationships, so that the forwarding node can determine that the first node can be A forwarding path is switched to the second forwarding path.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the first forwarding path belongs to a path in an SRv6 policy or an SR-TE policy, and the forwarding node is configured to: switch the first forwarding path is the second forwarding path in the SRv6 policy or the SR-TE policy, wherein the first forwarding path and the second forwarding path are the SRv6 policy or the SR-TE policy Different candidate paths are indicated by different segment routing lists in the same candidate path in the SRv6 policy or the SR-TE policy. It can be seen that when the first forwarding path is a certain candidate path in the first data tunnel, the forwarding node can switch the first forwarding path to another candidate path in the policy of the first data tunnel, so as to convert the first forwarding path to another candidate path in the policy of the first data tunnel. Switch to the second forwarding path. At this time, the first forwarding path and the second forwarding path are different candidate paths in the policy of the first data tunnel. Optionally, the second forwarding path may be a candidate path with the highest priority other than the first forwarding path in the first data tunnel.

Or, the first forwarding path belongs to a path in the SRv6 policy or the SR-TE policy, and the forwarding node is configured to: reduce the transmission ratio of data on the first forwarding path, and increase the ratio of data transmission on the first forwarding path The proportion of data transmission on one or more paths that belong to the same candidate path and are indicated by other segment lists. It can be seen that when the first forwarding path is a data forwarding path indicated by a certain segment routing list in a candidate path in the first data tunnel, the forwarding node can switch the first forwarding path to another segment routing list in the candidate path. The indicated data forwarding path. In this case, the first forwarding path and the second forwarding path are data forwarding paths indicated by different segment routing lists in the same candidate path in the policy of the first data tunnel.

Optionally, for the communication system provided in the fifth aspect or the sixth aspect, the forwarding node is further configured to: switch the second forwarding path back to the second forwarding path according to the error indicator of the first forwarding path meeting a preset condition. the first forwarding path; or, according to the bit error index of the first forwarding path meeting a preset condition, restore the transmission ratio of the data on the first forwarding path.

Optionally, the forwarding node may also be configured to: after switching the second forwarding path back to the original first forwarding path (or after restoring the transmission ratio of data on the first forwarding path), send a notification to the controller for the first forwarding path. 2. The information about switching the forwarding path back to the first forwarding path (or restoring the transmission ratio of data on the first forwarding path), so that the controller can determine the network topology of the node and the data forwarding paths laid out on multiple nodes according to the information. to manage.

In a seventh aspect, a network device is provided, the network device includes: a processor and a memory, where a program is stored in the memory, and the processor is configured to call the program stored in the memory, so that the network device Perform the path adjustment method described in any design of the first aspect.

In an eighth aspect, a network device is provided, the network device includes: a processor and a memory, where a program is stored in the memory, and the processor is configured to call the program stored in the memory, so that the network device The path adjustment method described in any design of the second aspect is performed.

In a ninth aspect, a computer storage medium is provided, where a computer program is stored in the storage medium, and the computer program is used to execute the path adjustment method according to any design of the first aspect.

In a tenth aspect, a computer storage medium is provided, where a computer program is stored in the storage medium, and the computer program is used to execute the path adjustment method according to any design of the second aspect.

According to an eleventh aspect, a computer program product containing instructions is provided, when the computer program product is executed on the path adjustment apparatus, the path adjustment apparatus executes the path adjustment method described in any one of the designs of the first aspect.

A twelfth aspect provides a computer program product comprising instructions, which, when the computer program product runs on the path adjustment device, causes the path adjustment device to execute the path adjustment method according to any design of the second aspect.

For the technical effect brought by any one of the design methods in the seventh aspect to the twelfth aspect, reference may be made to the technical effect brought by the corresponding design method in the first aspect, which will not be repeated here.

Description of drawings

1 is a schematic diagram of a scenario in which data is forwarded along a data forwarding path according to an embodiment of the present application;

2 is a schematic diagram of another scenario in which data is forwarded along a data forwarding path according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 4 is a flowchart of a path adjustment method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a data forwarding path provided by an embodiment of the present application;

6 is a schematic diagram of another data forwarding path provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a path adjustment provided by an embodiment of the present application;

FIG. 8 is another schematic diagram of path adjustment provided by an embodiment of the present application;

9 is a schematic structural diagram of a bit error TLV provided by an embodiment of the present application;

FIG. 10 is another schematic diagram of path adjustment provided by an embodiment of the present application;

11 is a schematic structural diagram of a first TLV according to an embodiment of the present application;

12 is a schematic structural diagram of a second TLV provided by an embodiment of the present application;

13 is a schematic structural diagram of a path adjustment device provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of another path adjustment apparatus provided by an embodiment of the present application.

Detailed ways

In order to make the principles and technical solutions of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

A communication system usually includes a plurality of nodes, and a node can be any device capable of forwarding data, such as a router, a gateway, and the like. The nodes in the communication system are connected by links.

Data forwarding paths may be deployed in the communication system. At least two nodes in the communication system (which may be located in the same network domain or in different network domains) are located on the data forwarding path, and the data forwarding path includes a link between the at least two nodes. Each node on the data forwarding path can forward data along the data forwarding path.

It should be noted that, the data forwarding path in this embodiment of the present application may be any type of path, for example, a path for forwarding Internet Protocol (Internet Protocol, IP) data, or a data tunnel path. The data tunnel may be any tunnel for forwarding data, for example, an SRv6 policy tunnel, an SR-TE policy tunnel, or a best-effort segment routing (Segment-Routing BestEffort, SR-BE) policy tunnel, and the like.

1 is a schematic diagram of a scenario in which data is forwarded along a data forwarding path according to an embodiment of the present application. As shown in FIG. 1 , the scenario includes node 1 to node 6, wherein node 1, node 2, node 3 and Node 4 is located on the data forwarding path. After node 1 receives the data, it can forward the data to node 2; after node 2 receives the data sent by node 1, it can forward the data to node 3; after node 3 receives the data sent by node 2, This data can be forwarded to node 4 . It can be seen that data can be forwarded along the data forwarding path where node 1, node 2, node 3 and node 4 are located. The data may be traffic flow.

For another example, FIG. 2 is a schematic diagram of another scenario in which data is forwarded along a data forwarding path provided by an embodiment of the present application. As shown in FIG. 2 , on the basis of FIG. 1 , the scenario in which data is forwarded along a data forwarding path may further include: controller. The controller is connected with the nodes in the communication system (the connection relationship between the controller and each node is not shown in FIG. 2 ). The controller is used to deploy the above data forwarding paths. It should be noted that, the data forwarding path in the scenario shown in FIG. 2 may be a path in the data tunnel, or may not be a path in the data tunnel, which is not limited in this embodiment of the present application.

When the data forwarding path shown in Figure 2 is the path of the SRv6 policy tunnel or the SR-TE policy tunnel, before deploying the data forwarding path, the controller can obtain the connection relationship between multiple nodes based on the IGP or BGP protocol, and A network topology of multiple nodes is generated based on the connection relationship, and a data tunnel (such as an SRv6 policy tunnel or an SR-TE policy tunnel) is planned according to the network topology. When the controller deploys the data forwarding path, it can deliver the data tunnel policy (such as SRv6 policy or SR-TE policy) to the head node of the data tunnel based on BGP or PCEP, so that the head node can determine the data according to the data tunnel policy The data forwarding path of the tunnel is further controlled to be forwarded along the data forwarding path.

A data tunnel strategy usually includes multiple candidate paths (Candidate paths), each candidate path includes one or more segment routing lists (segment lists), and each segment routing list is used to indicate a data forwarding path. Therefore, the policy of the data tunnel is used to indicate multiple data forwarding paths. Optionally, the candidate path in the policy of the data tunnel may not include the segment list. In this case, a candidate path is a data forwarding path, and the policy of the data tunnel is used to indicate multiple data forwarding paths. A data tunnel usually has a head node and a tail node. The head nodes of the multiple data forwarding paths indicated by the policy of the data tunnel are the head nodes of the data tunnel, and the tail nodes of the multiple data forwarding paths are the tail nodes of the data tunnel.

The policy of the data tunnel further includes a color (color) attribute of the data tunnel, which is used to indicate the service corresponding to the data tunnel. After receiving the policy of the data tunnel, the head node of the data tunnel can also determine the route matched by the data tunnel, and iterate the next hop of the route to the data tunnel, so that the data needs to be forwarded based on the route. Forwarded through the data forwarding path in the data tunnel. Wherein, for the data tunnel and its matching route, the tail node of the data tunnel is the next hop of the route, and the route carries the color attribute of the data tunnel. Optionally, the policy of the data tunnel includes multiple candidate paths, the data forwarding path for forwarding data in the data tunnel may be any candidate path, and the policy of the data tunnel may further include an identifier of the candidate path (which may be referred to as a BSID). When the head node iterates the next hop of the route to the data tunnel, the next hop of the route can be changed to the identifier of the candidate path for forwarding data in the policy of the data tunnel.

However, in the scenarios shown in Figures 1 and 2, data errors are likely to occur due to factors such as noise in the environment, alternating current in the environment, lightning pulses in the environment, and node failures during the forwarding process. When the bit error condition of the data is serious, the accuracy of data forwarding is low, and there is no solution for solving the data bit error at present.

Based on the above problems, an embodiment of the present application provides a path adjustment method, which can adjust the forwarding path when the bit error index of the first forwarding path does not meet the preset condition, thereby reducing the bit error of data and improving the Accuracy of data forwarding.

The path adjustment method provided by the embodiment of the present application can be used for the forwarding node and the controller (or only for the forwarding node). Before describing the path adjustment method provided by the embodiment of the present application, the embodiment of the present application briefly describes the structures of the forwarding node and the controller.

The forwarding node may include: a processor; the processor is coupled to the memory, and after reading the instructions in the memory, executes the method performed by the forwarding node as described in the embodiments of the present application according to the instructions. The controller also includes: a processor; the processor is configured to be coupled with the memory, and after reading the instructions in the memory, execute the method executed by the controller as described in the embodiments of the present application according to the instructions.

In each network device in the forwarding node and the controller, the number of processors may be multiple, and the memory coupled to the processor may be independent of the processor or independent of the network device, or may be in the processor or within a network device. The storage can be a physically independent unit, or a storage space on a cloud server or a network hard disk. Optionally, the memory may be one or more. When the number of memories is multiple, they can be located in the same or different positions, and can be used independently or in combination. Exemplarily, when the memory is located inside the network device, please refer to FIG. 3 , which is a schematic structural diagram of a network device according to an embodiment of the present application. The network device 200 includes: a processor 202 and a memory 201, wherein the memory 201 is used for storing a program, and the processor 202 is used for calling the program stored in the memory 201, so that the network device executes a corresponding method or function. Optionally, as shown in FIG. 3 , the network device 200 may further include at least one communication interface 203 and at least one communication bus 204 . The memory 201 , the processor 202 and the communication interface 203 are communicatively connected through a communication bus 204 . The communication interface 203 is used to communicate with other devices under the control of the processor 202 , and the processor 202 can call the program stored in the memory 201 through the communication bus 204 .

The following will take the embodiment shown in FIG. 4 as an example to explain and describe the path adjustment method provided by the embodiment of the present application.

Exemplarily, FIG. 4 is a flowchart of a path adjustment method provided by an embodiment of the present application. The path adjustment method can be used in the scenario shown in FIG. 2 , and the data forwarding path shown in FIG. 2 is an SRv6 policy tunnel or SR. -The path of the TE policy tunnel. As shown in Figure 4, the path adjustment method may include:

S101. The controller sends an indication message to the forwarding node, where the indication message is used to instruct to use the first data tunnel to forward data.

The controller can plan the first data tunnel according to the network topology between the nodes, and deliver an instruction message for instructing to use the first data tunnel to forward data to the forwarding node. At this time, the forwarding node may be the head node of the data tunnel.

Assuming that the head node of the first data tunnel is node 1 in FIG. 2, and the tail node is node 4 in FIG. 2, then the forwarding node may be node 1, and node 1 forwards data using the first data tunnel and forwards data from Node 1 forwards to Node 4.

The instruction message sent by the controller to the forwarding node may include: the policy of the first data tunnel (such as SRv6 policy or SR-TE policy). The strategy of the first data tunnel includes: multiple candidate paths, each candidate path may include one or more segment routing lists, and each segment routing list is used to indicate a data forwarding path. When the first data tunnel is an SR-TE policy tunnel, the segment routing list may be a list of labels of nodes other than the head node on the data forwarding path indicated by the segment routing list. When the first data tunnel is an SRv6 policy tunnel, the segment routing list may be a list of Internet Protocol Version 6 (IPv6) addresses of nodes other than the head node on the data forwarding path indicated by the segment routing list. Optionally, the candidate path in the policy of the data tunnel may not include the segment list. In this case, a candidate path is a data forwarding path, which is not limited in this embodiment of the present application.

Taking the first data tunnel as an SR-TE policy tunnel as an example, assume that the label of node 2 is node label 2, the label of node 3 is node label 3, the label of node 4 is node label 4, and the label of node 5 is node label 5 , the label of node 6 is node label 6. As shown in Table 1, the policy of the first data tunnel includes candidate paths A and B.

The candidate path A includes three segment routing lists, namely segment routing list <node label 2, node label 3, node label 4>, segment routing list <node label 2, node label 4> and segment routing list <node label 4> . The three data forwarding paths indicated by the three segment routing lists are the data forwarding paths 1, 2 and 3 shown in FIG. 5 .

The candidate path B includes two segment routing lists, namely the segment routing list <node label 5, node label 4> and the segment routing list <node label 5, node label 6, node label 4>. The two data forwarding paths indicated by the two segment routing lists in the candidate path B are the data forwarding paths 4 and 5 shown in FIG. 6 .

Table 1

In Table 1, it is taken as an example that the candidate path includes multiple segment routing lists. Optionally, the candidate path may also include a segment routing list, for example, the candidate path A includes the segment routing list <node label 2, node label 3, node label 4>, and the candidate path B includes the segment routing list <node label 5, node label 4> Label 4>. Alternatively, the candidate path may not include the segment routing list. For example, the candidate paths A and B do not include the segment routing list. The candidate path A is the data forwarding path 1 shown in FIG. 5 , and the candidate path B is the data forwarding path 1 shown in FIG. 6 . data forwarding path 4 shown.

S102. The forwarding node forwards the data by using the forwarding path in the first data tunnel.

The first data tunnel may include multiple data forwarding paths (multiple data forwarding paths indicated by the policy of the first data tunnel). After receiving the indication message, the forwarding node may determine at least one data forwarding path for forwarding data in the first data tunnel according to the indication message, and use the at least one data forwarding path to forward data.

Illustratively, for the example in S101, the first data tunnel includes five paths in total, which are: three data forwarding paths in FIG. 5 and three data forwarding paths in FIG. 6 . The forwarding node can filter out a path for forwarding data from the five data forwarding paths according to certain rules. For example, each candidate path in the policy of the first data tunnel has a priority, for example, the priority of candidate path A in Table 1 is 1, and the priority of candidate path B is 2. The forwarding node may use the data forwarding path indicated by the segment routing list in the candidate path with the highest priority as the path for forwarding data. Referring to Table 1, the candidate path with the highest priority is the candidate path A, then the forwarding node can use the data forwarding paths 1, 2 and 3 in FIG. 5 indicated by the segment routing list in the candidate path A to forward data.

When forwarding data by using the forwarding path, the forwarding node may forward the data according to the segment routing list used to indicate the forwarding path. For example, take the forwarding node as node 1 in FIG. 5 , and node 1 forwards data by using data forwarding path 1 indicated by the segment routing list <node label 2, node label 3, node label 4> as an example. When node 1 receives a data packet that needs to be forwarded on the first data tunnel, it can add the segment routing list to the data packet, and then send the data packet to the first node label (node label 2) in the segment routing list. ) corresponding to the node (node 2). After receiving the data packet, node 2 can delete the label of node 2 (node label 2) in the segment routing list, and then send the data packet to the corresponding node label (node label 3) in the segment routing list. node (node 3). After receiving the data packet, node 3 can delete the label of node 3 (node label 3) in the segment routing list, and then send the data packet to the corresponding node label (node label 4) in the segment routing list. node (node 4). After receiving the data packet, node 4 can delete the label of node 4 (node label 4 ) in the segment routing list, so as to obtain the data packet received by node 1 . In this way, the head node (node 1 ) of the first data tunnel forwards the data packet to the tail node (node 4 ) of the first data tunnel along the data forwarding path 1 .

For another example, when the candidate path includes a segment routing list, the forwarding node may forward data using a data forwarding path indicated by a segment routing list in the candidate path with the highest priority. When the candidate path does not include the segment routing list, the forwarding node can use the candidate path with the highest priority to forward data.

S103. The forwarding node determines that the bit error indicator of the first forwarding path does not meet the preset condition, and the first forwarding path belongs to a data forwarding path used for forwarding data in the first data tunnel.

In the process of forwarding data using at least one data forwarding path in the first data tunnel, the forwarding node may use all or part of the at least one data forwarding path as the first forwarding path, and detect errors in the first forwarding path. Whether the code index meets the preset conditions. For example, the forwarding node takes a candidate path in the first data tunnel (the candidate path may include at least one segment routing list, or may not include the segment routing list) as the first forwarding path; when the candidate path in the first data tunnel When the segment routing list is included, the forwarding node may also use the data forwarding path indicated by a certain segment routing list in the first data tunnel as the first forwarding path.

Taking the example in S102 as an example, it is assumed that the forwarding node uses the data forwarding paths 1, 2 and 3 in FIG. 5 indicated by the segment routing list in the candidate path A to forward data, then the first forwarding path may be the candidate path A, Including data forwarding paths 1, 2 and 3, the first forwarding path may also be data forwarding paths 1, 2 or 3. Assuming that the candidate path A includes a segment routing list, and the segment routing list is used to indicate the data forwarding path 1 in FIG. 5 , the first forwarding path may be the data forwarding path 1 . Assuming that the candidate path A does not include a segment routing list, and the candidate path A is the data forwarding path 1 in FIG. 5 , the first forwarding path may be the candidate path A (that is, the data forwarding path 1).

It should be noted that the bit error indicator is an indicator related to bit error, such as a bit error rate (symbol error rate, SER) in the usual sense or a bit error obtained by deforming a simple formula based on the usual calculation method of the bit error rate. Indicators, such as the duration of bit errors or the amount of bit error data, etc. As a possible calculation method of the bit error index, the bit error rate is equal to the proportion of the number of bit errors in the total number of forwarded codes. Meeting the preset conditions and not meeting the preset conditions are relative, so meeting the preset conditions can also be naturally understood as not meeting a corresponding condition, and not meeting the preset conditions can also be naturally understood as meeting a corresponding condition. This is related to the setting content of the condition and the trigger mechanism of the condition. For example, taking the bit error indicator as the bit error rate as an example, when the preset condition is that the bit error rate is less than or equal to the bit error rate threshold, the forwarding node in S103 may determine that the bit error indicator of the first forwarding path does not meet the preset condition, Switch the first forwarding path to the second forwarding path; when the preset condition is that the bit error rate is greater than the bit error rate threshold, the forwarding node in S103 may, according to the error index of the first forwarding path meeting the preset condition, forward the first forwarding The path is switched to the second forwarding path. It should be understood that, except for the situation described above, any other simple modifications to the error index and preset conditions do not affect the implementation of the solution of the present application, and therefore should be covered within the spirit of the inventive concept proposed in the present application.

Optionally, the first forwarding path includes at least one bit error link (a bit error link is a link with bit errors), and in this embodiment of the present application, the bit error index of the bit error link may be referred to as a bit error link. Corresponding bit error indicator. The error index of the first forwarding path in S103 does not meet the preset condition, which may include: at least one error index corresponding to the at least one error link does not meet the preset condition. In this case, the forwarding node may first determine at least one error link in the first forwarding path. Optionally, the forwarding node may detect the error link on the first forwarding path based on a bidirectional forwarding detection (Bidirectional Forwarding Detection, BFD) protocol. Afterwards, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition when the at least one error index corresponding to the at least one error link does not meet the preset condition. For example, it is assumed that the first forwarding path includes links 1, 2 and 3, and bit errors occur on links 1 and 2, but no bit errors occur on link 3. The forwarding node may determine that the error index of the first forwarding path does not meet the preset condition after determining that the error index of link 1 does not meet the preset condition and the error index of link 2 does not meet the preset condition.

The above-mentioned at least one bit error index does not meet the preset conditions can be understood in various ways, for example: one or more of the at least one error index index does not meet the preset conditions (that is, there are any errors in the at least one error index that do not meet the preset conditions. or the statistic value of the at least one bit error indicator does not meet the preset condition. Wherein, the statistical value of the at least one bit error indicator may be the cumulative sum, median, average or weighted average of the at least one bit error indicator, and the statistical value of the at least one bit error indicator may also be: the at least one bit error indicator The number of bit error indicators that do not meet the indicator requirements in a bit error indicator, etc., is not limited in this embodiment of the present application.

For example, taking the error indicator of the bit error link as the bit error rate as an example, the at least one bit error indicator corresponding to the at least one bit error link described above is the at least one bit error rate. In this case, one or more of the above at least one bit error index does not meet the preset condition, including: one or more of the at least one bit error rate does not meet the bit error rate threshold (for example, greater than the bit error rate threshold, or , greater than or equal to the bit error rate threshold); the statistical value of at least one bit error index corresponding to the at least one bit error link above does not meet the preset conditions, including: the at least one bit error rate does not meet the bit error rate threshold. The number exceeds the preset value, or the cumulative sum of the at least one bit error rate does not meet the preset value.

For example, assuming that the first forwarding path includes links 1, 2 and 3, where link 1 and link 2 are both error links, link 3 is not an error link, and the error indicator is the error rate, The bit error rate of link 1 is 5%, the bit error rate of link 2 is 4%, and the bit error rate threshold is 3%.

If one or more of the above at least one bit error indicator does not meet the preset conditions, including: one or more of the at least one bit error rate does not meet the bit error rate threshold, the forwarding node may determine the link 1 and link The bit error rates of path 2 are all greater than the bit error rate threshold, so it is determined that the two bit error rates corresponding to links 1 and 2 do not meet the bit error rate threshold, and the first forwarding path does not meet the preset condition.

If the statistical value of the at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition, it includes: the number of the at least one bit error rate that does not meet the bit error rate threshold exceeds the preset value, and the preset value is 1, then the forwarding node can determine that the bit error rates of link 1 and link 2 are both greater than the bit error rate threshold, and determine that the number 2 of the two bit error rates that do not meet the bit error rate threshold exceeds the preset value of 1 , so that it is determined that the two bit error rates corresponding to the links 1 and 2 do not meet the preset conditions, and the first forwarding path does not meet the preset conditions.

If the statistical value of the at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition, including: the accumulated sum of the at least one bit error rate does not meet the preset value (for example, it is greater than the preset value), the preset If the value is set to 8%, then the forwarding node can determine that the sum of the bit error rates of link 1 and link 2 is 9% greater than the preset value of 8%, thus determining that the two bit error rates corresponding to links 1 and 2 are not satisfied A preset condition, the first forwarding path does not meet the preset condition.

Also optionally, when the first forwarding path includes: one or more sub-paths with the same head node and the same tail node, the bit error indicator of the first forwarding path does not meet the preset condition, and may include: the first forwarding At least one bit error index corresponding to at least one bit error sub-path in the path does not meet the preset condition. In this case, the forwarding node may determine that the error index of the first forwarding path does not meet the preset condition according to the at least one bit error index corresponding to the at least one sub-path does not meet the preset condition. It should be noted that the data forwarded on the first forwarding path can be forwarded through any sub-path in the first forwarding path, each sub-path in the first forwarding path can be used for load balancing, and the bit-error sub-path means that there is an error in the sub-path. code subpath. For example, the first forwarding path may be a candidate path in the SRv6 policy or the SR-TE policy, the candidate path includes at least one segment routing list, and the sub-paths in the first forwarding path may be the data forwarding indicated by the segment routing list in the candidate path. path.

It should be noted that, for the explanation that at least one error index corresponding to at least one error sub-path in the first forwarding path does not meet the preset condition, reference may be made to the explanation that at least one error index corresponding to at least one error link does not meet the preset condition. , which is not repeated in this embodiment of the present application.

S104. The forwarding node switches the first forwarding path to the second forwarding path according to the error indicator of the first forwarding path not meeting the preset condition.

After the forwarding node determines that the bit error indicator of the first forwarding path does not meet the preset condition, it may determine that the quality of data forwarding on the first forwarding path is low. If the preset conditions are met, the first forwarding path is switched to the second forwarding path. The second forwarding path is different from the first forwarding path.

For example, the first forwarding path includes at least one error link, and the second forwarding path may not include one or more of the at least one error link. Taking the data forwarding path 1 (passing through nodes 1, 2, 3 and 4) shown in FIG. 5 as the first forwarding path as an example, the data forwarding path 1 includes link 1 (the link between node 1 and node 2), Link 2 (the link between Node 2 and Node 3) and Link 3 (the link between Node 3 and Node 4), where Links 1 and 2 are error links, and Link 3 is not Not an errored link. As shown in FIG. 7 , the second forwarding path to which the forwarding node switches the first forwarding path (data forwarding path 1 in FIG. 5 ) may also be the data forwarding path 2 in FIG. 5 (via nodes 1 , 2 and 4 ) , at this time, the second forwarding path does not include an error link (the link between node 2 and node 3) on the first forwarding path. Alternatively, as shown in FIG. 8 , the second forwarding path to which the forwarding node switches the first forwarding path (data forwarding path 1 in FIG. 5 ) may be the data forwarding path 3 in FIG. 5 (via nodes 1 and 4 ), At this time, the second forwarding path does not include the two error links on the first forwarding path (the link between node 1 and node 2, and the link between node 2 and node 3).

Since the second forwarding path does not include one or more error links in the first forwarding path, the forwarding node can avoid data forwarding on the one or more error links by using the second forwarding path to forward data. Avoid or alleviate the situation of low forwarding quality caused by data forwarding on these erroneous links.

In another example, when the first forwarding path includes at least one error sub-path, and the at least one error indicator corresponding to the at least one error sub-path does not meet the preset condition, the second forwarding path does not include the at least one error sub-path. one or more of the paths. Since the second forwarding path does not include one or more bit error sub-paths in the first forwarding path, the forwarding node can avoid data forwarding on the one or more bit error sub-paths by using the second forwarding path to forward data, so it can avoid or Alleviate the situation of low forwarding quality caused by data forwarding on these bit-error subpaths.

Optionally, the first forwarding path and the second forwarding path may belong to the same data tunnel (first data tunnel). The forwarding node may switch the first forwarding path to the second forwarding path in the policy of the first data tunnel.

For example, when the first forwarding path is a certain candidate path in the first data tunnel, the forwarding node may switch the first forwarding path to another candidate path in the policy of the first data tunnel, so as to switch the first forwarding path. is the second forwarding path. At this time, the first forwarding path and the second forwarding path are different candidate paths in the policy of the first data tunnel. Optionally, the second forwarding path may be a candidate path with the highest priority other than the first forwarding path in the first data tunnel.

For example, taking the example in S101 as an example, it is assumed that the candidate path A in the first data tunnel in Table 1 is the path for forwarding data, and the first forwarding path is the candidate path A. When switching the first forwarding path to the second forwarding path, the forwarding node may lower the priority of the candidate path A and raise the priority of the candidate path B (the second forwarding path), so that the candidate path B has the highest priority Therefore, the path for forwarding data in the first data tunnel is switched from candidate path A to candidate path B, and data is switched from forwarding on candidate path A to forwarding on candidate path B. It can be seen that before the forwarding node switches the first forwarding path to the second forwarding path, the data is forwarded along the data forwarding paths 1, 2 and 3 in FIG. 5; the forwarding node switches the first forwarding path to the second forwarding path After that, the data is forwarded along the data forwarding paths 4 and 5 in FIG. 6 .

For another example, if the candidate path A in Table 1 includes a segment routing list, and the segment routing list is used to indicate the data forwarding path 1 in FIG. 5, the candidate path B includes a segment routing list, and the segment routing list is used for Indicates the data forwarding path 4 in FIG. 6 , and the first forwarding path is the candidate path A. Then, when switching the first forwarding path to the second forwarding path, the forwarding node can lower the priority of the candidate path A and raise the priority of the candidate path B (the second forwarding path), so that the candidate path B has the highest priority Therefore, the path for forwarding data in the first data tunnel is switched from candidate path A to candidate path B, and the data is switched from forwarding on candidate path A to forwarding on candidate path B. It can be seen that before the forwarding node switches the first forwarding path to the second forwarding path, the data is forwarded along the data forwarding path 1 in FIG. 5; after the forwarding node switches the first forwarding path to the second forwarding path, the data is forwarded along the data forwarding path 1. The data forwarding path 4 in FIG. 6 forwards.

For another example, if the candidate paths A and B in Table 1 do not include the segment routing list, and the candidate path A is the data forwarding path 1 in FIG. 5 , and the candidate path B is the data forwarding path 4 in FIG. 6 , the first forwarding The path is the candidate path A. Then, when switching the first forwarding path to the second forwarding path, the forwarding node can lower the priority of the candidate path A and raise the priority of the candidate path B (the second forwarding path), so that the candidate path B has the highest priority Therefore, the path for forwarding data in the first data tunnel is switched from candidate path A to candidate path B, and the data is switched from forwarding on candidate path A to forwarding on candidate path B. It can be seen that before the forwarding node switches the first forwarding path to the second forwarding path, the data is forwarded along the data forwarding path 1 in FIG. 5; after the forwarding node switches the first forwarding path to the second forwarding path, the data is forwarded along the data forwarding path 1. The data forwarding path 4 in FIG. 6 forwards.

In another example, when the first forwarding path is a data forwarding path indicated by a certain segment routing list in a certain candidate path in the first data tunnel, the forwarding node may switch the first forwarding path to another segment routing list in the candidate path. The indicated data forwarding path. In this case, the first forwarding path and the second forwarding path are data forwarding paths indicated by different segment routing lists in the same candidate path in the policy of the first data tunnel.

For example, taking the example in S101 as an example, it is assumed that the candidate path A in the first data tunnel in Table 1 is the path for forwarding data, and the first forwarding path is the route list in the middle segment of the candidate path A < node label 2, node label 3. The data forwarding path 1 in FIG. 5 indicated by the node label 4>. Each segment routing list in the candidate path of the first data tunnel has a weight, and the weight of the segment routing list is used to indicate: in the data forwarded by the candidate path to which the segment routing list belongs, the data forwarding path indicated by the segment routing list The proportion of data forwarded on the Internet. When switching the first forwarding path to the second forwarding path, the forwarding node can reduce the weight of the segment routing list <node label 2, node label 3, node label 4> to zero, and reduce the weight of other segment routing lists in the candidate path. The weight is correspondingly increased, so that the data forwarded on the first forwarding path is switched to be forwarded on the data forwarding paths indicated by other segment routing lists. At this time, the second forwarding paths include data forwarding paths 2 and 3 in FIG. 5 . It can be seen that before the forwarding node switches the first forwarding path to the second forwarding path, the data in the first forwarding path is forwarded along the data forwarding path 1 in FIG. 5; the forwarding node switches the first forwarding path to the second forwarding path. After the forwarding path, the data in the first forwarding path is forwarded along data forwarding paths 2 and 3 in FIG. 5 .

Optionally, assuming that the first data tunnel includes a first candidate path, and the first forwarding path is a data forwarding path indicated by a routing list of a certain segment in the first candidate path, if the routing list of other segments in the first candidate path indicates The bit error index of the data forwarding path also does not meet the preset conditions, then the forwarding node can switch the candidate path used by the forwarding node to forward data from the first candidate path to the second candidate path, and then switch the first forwarding path to the second candidate path. The data forwarding path indicated by the route list in the middle of the two candidate paths. The first candidate path and the second candidate path are any two candidate paths of the first data tunnel. The forwarding node may lower the priority of the first candidate path and increase the priority of the second candidate path to switch the candidate path used by the forwarding node to forward data from the first candidate path to the second candidate path.

S105. The forwarding node sends an error message to the controller according to the error index of the first forwarding path not meeting the preset condition, where the error message is used to announce the error information associated with the first forwarding path.

When determining that the error index of the first forwarding path does not meet the preset condition, the forwarding node may send an error message to the controller to notify the controller of the error information associated with the first forwarding path.

For example, in S103, when the forwarding node determines that the error index of the first forwarding path does not meet the preset condition according to the error index of at least one error link in the first forwarding path does not meet the preset condition, the error information It may include: the error index of the first forwarding path does not meet the preset condition, the error link in the first forwarding path, the error link in the first forwarding path that does not meet the preset condition, and/or, the forwarding node Adjustment of the first forwarding path (for example, the forwarding node switches the first forwarding path to the second forwarding path) and the like. When the forwarding node in S103 determines that the error index of the first forwarding path does not meet the preset condition according to the error index of at least one error sub-path in the first forwarding path, the error information may include: The bit error index of a forwarding path does not meet the preset conditions, the error sub-paths in the first forwarding path, the error sub-paths in the first forwarding path that do not meet the preset conditions, and/or the forwarding node for the first forwarding path (for example, the forwarding node switches the first forwarding path to the second forwarding path) and so on.

Optionally, the error message is a BGP message. For example, a Border Gateway Protocol-Link State (Border Gateway Protocol-Link State, BGP-LS) message.

Exemplarily, the above-mentioned bit error information associated with the first forwarding path may include: bit error information of an errored link in the first forwarding path. In this case, the sub-attribute of the Type Length Value (TLV) in the Link descriptor (Link descriptor) in the Link Network Layer Reachability message (Link NLRI) in the BGP-LS message can be extended, Add sub-TLV (secondary TLV) as bit error TLV. The BGP-LS message is a status message of a certain link, and the bit error TLV in the BGP-LS message is used to indicate the bit error condition of the link (such as whether there is a bit error, and/or, bit error rate, etc.).

The structure of the error TLV may be as shown in FIG. 9 , and the error TLV may include: a type (Type) field, a length (Length) field, a flag (Flags) and a reserved (Reserved) field arranged in sequence, wherein the type The field is used to indicate the type of the error TLV, the length field is used to indicate the length of all fields following the length field, and the flag field can be used to indicate the error condition of the link. Further, the flag field may include 8 bits (eg, bit 0 to bit 7), and the first bit of the 8 bits may be used to indicate the bit error condition of the link. For example, when the value of the first bit is 0, the first bit is used to indicate that all topology IDs (numbers) and slice IDs in the link have errors; when the value of the first bit is When it is 1, the first bit is used to indicate that both the partial topology ID (number) and the slice ID in the link have bit errors. Or, when the value of the first bit is 1, the first bit is used to indicate that: all topology IDs (numbers) and slice IDs in the link have errors; when the value of the first bit is When it is 0, the first bit is used to indicate that both the partial topology ID (number) and the slice ID in the link have bit errors.

Please continue to refer to FIG. 9, the bit error TLV may also include other fields, such as the bit error rate field, the bit error duration field and the sub-TLV (sub-TLV) in FIG. 9, where the bit error rate field is used to indicate the chain The bit error rate of the link, and the bit error duration field is used to indicate the duration of the link error.

In another example, the above-mentioned bit error information associated with the first forwarding path may include: bit error information of the first data tunnel where the first forwarding path is located. In this case, the sub-attribute of the TLV in the Link descriptor in the Link NLRI in the BGP-LS message (or the sub-attribute of the traffic engineering policy attribute TE Policy Atrribute) can be extended, and the secondary TLV can be added as the error TLV. The bit error TLV is used to indicate the bit error condition of the first data tunnel (eg, whether there is a bit error, and/or a bit error rate, etc.). For the structure of the error TLV, reference may be made to the structure of the error TLV shown in FIG. 9 , but the first bit in the flag field may be used to indicate the error condition of the first data tunnel. For example, when the value of the first bit is 0, the first bit is used to indicate that there are errors in the data forwarding paths indicated by all the segment routing lists in the first data tunnel; when the first bit is When the value of the bit is 1, the first bit is used to indicate that all the data forwarding paths indicated by the partial segment routing list in the first data tunnel have bit errors. Or, when the value of the first bit is 1, the first bit is used to indicate that there are errors in the data forwarding paths indicated by all the segment routing lists in the first data tunnel; when the first bit is When the value of the bit is 0, the first bit is used to indicate that the data forwarding paths indicated by all the segment routing lists in the first data tunnel have bit errors. The bit error rate field in FIG. 9 is used to indicate the bit error rate of the first data tunnel, and the bit error duration field is used to indicate the duration of the bit error of the first data tunnel.

S106. The forwarding node determines that the bit error index of the first forwarding path meets a preset condition.

S107: The forwarding node switches the second forwarding path back to the first forwarding path according to the bit error index of the first forwarding path meeting the preset condition.

After switching the first forwarding path to the second forwarding path, the forwarding node may also detect whether the bit error indicator of the first forwarding path meets a preset condition. If it is detected that the bit error indicator of the first forwarding path meets the preset condition, the forwarding node can switch the second forwarding path back to the original first forwarding path.

Optionally, after switching the second forwarding path back to the original first forwarding path, the forwarding node may also send the information for announcing that the second forwarding path is switched back to the first forwarding path to the controller, so that the controller can switch the second forwarding path back to the first forwarding path according to the information. The information manages the network topology of the nodes and the data forwarding paths laid out on multiple nodes.

To sum up, in the path adjustment method provided by the embodiment of the present application, the forwarding node can switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path not meeting the preset condition, so as to realize the adjustment of the first forwarding path. Adjustment of forwarding paths. Thereby, the problem of low forwarding quality caused by data being forwarded on the first forwarding path whose bit error index does not meet the preset condition is avoided or alleviated.

In addition, the forwarding node can adjust the first forwarding path without the aid of a controller. Therefore, the path adjustment method provided by the embodiment of the present application has higher path adjustment efficiency and stronger timeliness. Moreover, since the path adjustment process is allowed to be completed independently by the forwarding node, the load of the controller is also reduced, and the occurrence of an excessively high load of the controller is avoided.

In the embodiment shown in FIG. 4 , when adjusting the first forwarding path, the forwarding node adopts an adjustment manner of switching the first forwarding path to the second forwarding path. Optionally, when the forwarding node adjusts the first forwarding path, other adjustment methods may also be used. For example, the forwarding node may reduce the forwarding ratio of data on the first forwarding path according to the fact that the bit error index of the first forwarding path does not meet the preset condition.

For example, the forwarding node may reduce the forwarding ratio of data on the first forwarding path to 50% or 60% of the original.

For another example, the above-mentioned first forwarding path belongs to a data forwarding path indicated by a certain segment of the routing list in a certain candidate path in the policy of the first data tunnel. The forwarding node can reduce the forwarding ratio of data on the first forwarding path, and increase the forwarding ratio of data on one or more data forwarding paths that belong to the same candidate path as the first forwarding path and are indicated by other segment routing lists.

Taking the example in S101 as an example, it is assumed that the candidate path A in the first data tunnel in Table 1 is a path for forwarding data, and the first forwarding path is the route list in the middle segment of the candidate path A < node label 2, node label 3, Node label 4> data forwarding path 1 in Figure 5 as indicated. Each segment routing list in the candidate path of the first data tunnel has a weight, and the weight of the segment routing list is used to indicate that the data forwarded by the candidate path to which the segment routing list belongs is on the data forwarding path indicated by the segment routing list The percentage of data forwarded. When the forwarding node adjusts the first forwarding path, the weight of the segment routing list <node label 2, node label 3, node label 4> can be reduced (for example, reduced to 50% or 60% of the original weight, or reduced to zero), The weights of other segment routing lists in the candidate paths are correspondingly increased, so that at least part of the data forwarded on the data forwarding path 1 in FIG. 5 is switched to be forwarded on the data forwarding paths 2 and/or 3 in FIG. 5 .

In the embodiment shown in FIG. 4 , the first forwarding path and the second forwarding path belong to the same data tunnel (first data tunnel) as an example. Optionally, the first forwarding path and the second forwarding path may also belong to different For example, the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel. The forwarding path is switched to the second forwarding path.

For example, the second data tunnel may be a tunnel pre-configured by the upper-layer service in the forwarding node, and when the forwarding node determines that the bit error indicator of the first forwarding path does not meet the preset condition, the first data tunnel may be switched to the second data tunnel. tunnel, so that the first forwarding path is switched to the second forwarding path. The upper-layer service may be any service, such as an L3VPN service.

For another example, the second data tunnel may be a data tunnel planned by the controller. In this case, when the forwarding node determines that the bit error indicator of the first forwarding path does not meet the preset condition, it may send a switching request message for requesting switching of the first data tunnel to the controller; after the controller receives the switching After the request message, a handover response message can be sent to the forwarding node according to the handover request message. The handover response message is used to instruct the use of the second data tunnel to forward data. The content of the handover response message can refer to the content of the indication message in S101. This application The embodiment will not be repeated here. When switching the first forwarding path to the second forwarding path, the forwarding node may switch the first data tunnel to the second data tunnel according to the switching response message, so as to switch the first forwarding path in the first data tunnel to the second forwarding path. The second forwarding path in the second data tunnel.

Optionally, the handover request message sent by the forwarding node to the controller may be a BGP message.

Optionally, when determining that the error index of the first forwarding path does not meet the preset condition, the forwarding node may first adjust the first forwarding path based on the policy of the first data tunnel (as shown in FIG. 4 , the first forwarding path is switched to the second forwarding path in the first data tunnel). When the bit error index of each data forwarding path in the first data tunnel is not below the preset condition, the forwarding node may switch the first data tunnel to the second data tunnel, so as to switch the first forwarding path in the first data tunnel Switch to the second forwarding path in the second data tunnel.

For example, taking the example in S101 as an example, it is assumed that the first forwarding path is the data forwarding path 1 in FIG. The bit error index of the first forwarding path does not meet the preset condition. If the data forwarding paths indicated by the segment routing list other than the segment routing list corresponding to data forwarding path 1 in Table 1 (such as data forwarding paths 2 and 3 in FIG. 5 and data forwarding paths 4 and 5 in FIG. 6 ) ) does not meet the preset condition, then the forwarding node can switch the first data tunnel to the second data tunnel, and then use the second forwarding path in the second data tunnel to forward the original forwarding on the first forwarding path The data.

Optionally, when the first forwarding path is a data forwarding path indicated by a certain segment of the routing list, the forwarding node detects whether the bit error indicators of other forwarding paths in the first data tunnel except the first forwarding path satisfy a preset value. When the conditions are met, it may be first detected whether the bit error indicators of the data forwarding paths indicated by other segment routing lists that belong to the same candidate path in the segment routing list corresponding to the first forwarding path satisfy the preset condition. When the bit error indicators of the data forwarding paths indicated by all the segment routing lists in the candidate path do not meet the preset conditions, the forwarding node may continue to detect the bit errors of the data forwarding paths indicated by the segment routing lists in other candidate paths Whether the indicator meets the preset conditions. For example, the forwarding node may sequentially detect whether the bit error indicators of the data forwarding paths indicated by the middle segment routing lists of other candidate paths meet the preset conditions in order of priority of the candidate paths from high to low.

For example, taking the example in S101 as an example, it is assumed that the first forwarding path is the data forwarding path 1 in FIG. The forwarding node can first detect whether the bit error indicators of data forwarding paths 2 and 3 in FIG. 5 indicated by other segment routing lists in the candidate path A meet the preset conditions, and if the bit error indicators of these data forwarding paths also do not meet the predetermined conditions. If the condition is set, the forwarding node can continue to detect whether the bit error indicator of the data forwarding path indicated by the segment routing list in the candidate path B satisfies the preset condition.

Optionally, when the first forwarding path is a certain candidate path, the forwarding node may sequentially detect whether the bit error indicators of other candidate paths satisfy the preset condition in order of priority of the candidate paths from high to low.

In the embodiment shown in FIG. 4 , the forwarding node switches the first forwarding path to the second forwarding path according to the policy of the first data tunnel. In this case, the second forwarding path is a pre-configured path. Optionally, the second forwarding path may not be a pre-configured path. For example, the second forwarding path is a path calculated by the forwarding node (for example, calculated based on IGP).

In this case, when the forwarding node determines that the bit error index of the first forwarding path does not meet the preset condition, it can calculate the second forwarding path, and then switch the first forwarding path to the second forwarding path. This process does not need to rely on Therefore, the timeliness of switching the first forwarding path to the second forwarding path is relatively high. Moreover, the forwarding node may be any node on the first forwarding path, such as a head node or an intermediate node. The second forwarding path may be a path in the data tunnel, or may not be a path in the data tunnel, which is not limited in this embodiment of the present application.

For example, assuming that the network topology of each node is shown in FIG. 10, if the first forwarding path is node 1→node 2→node 3→node 4, in the process of data forwarding along the first forwarding path, the first forwarding path Each node on the first forwarding path can detect whether the link on the first forwarding path is an error link whose bit error index does not meet the preset condition, and determine whether the error index of the first forwarding path meets the preset condition according to the result. . When the node 2 determines that the link between the node 2 and the node 3 is an error link whose error index does not meet the preset condition, so that the error index of the first forwarding path does not meet the preset condition, the node 2 can calculate the node The path between 2 and node 3 bypassing the link is node 2→node 5→node 6, and then a second forwarding path node 1→node 2→node 5→node 6→node 4 is obtained.

In the above embodiment, when the forwarding node determines that the error index of the first forwarding path does not meet the preset condition, it directly adjusts the first forwarding path, for example, switches the first forwarding path to the second forwarding path, or reduces the data The forwarding ratio on the first forwarding path. Optionally, before adjusting the first forwarding path, the forwarding node may also determine whether the first forwarding path belongs to a path that allows adjustment, and only performs the first forwarding path when it is determined that the first forwarding path belongs to a path that allows adjustment. Adjustment.

For example, the forwarding node may acquire a path indication of one or more paths that are allowed to be adjusted, and then can judge whether the one or more paths that are allowed to be adjusted include the first forwarding path according to the path indication. When the one or more paths that are allowed to be adjusted include the first forwarding path, the forwarding node may switch the first forwarding path to the second forwarding path, or reduce the forwarding ratio of data on the first forwarding path.

Optionally, when the forwarding node adjusts the first forwarding path in a manner of switching the first forwarding path to the second forwarding path, the forwarding node may also determine whether the second forwarding path is not adjusted before adjusting the first forwarding path. For one or more paths that are allowed to be adjusted, the first forwarding path is switched to the second forwarding path only when it is determined that the second forwarding path belongs to one or more paths that are allowed to be adjusted.

Alternatively, the forwarding node adjusts the forwarding ratio of the first forwarding path in a manner of reducing the forwarding ratio of data on the first forwarding path and increasing the forwarding ratio of data on another forwarding path (which may be referred to as a third forwarding path). In this case, before adjusting the first forwarding path, the forwarding node may further determine a third forwarding path different from the first forwarding path from one or more paths that allow adjustment. After that, the forwarding node further reduces the forwarding ratio of data on the first forwarding path, and increases the forwarding ratio of data on the third forwarding path.

It should be noted that, when the first forwarding path has certain requirements on data forwarding quality, one or more paths that are allowed to be adjusted may include the first forwarding path; when the first forwarding path does not require data forwarding quality, adjustment is allowed. One or more of the paths may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node. In addition, in this embodiment of the present application, whether the second forwarding path and the third forwarding path belong to the paths that are allowed to be adjusted may be set as required, so that the flexibility of path adjustment can be improved.

Further, the above path indication may be delivered by the controller to the forwarding node, may also be delivered by other devices to the forwarding node, or may be configured locally by the forwarding node, which is not limited in this embodiment of the present application.

When the path indication is delivered by the controller to the forwarding node, the path indication may be carried in a BGP message or PECP message sent by the controller to the forwarding node. Optionally, the BGP message or the PCEP message may be a message for delivering a policy of the data tunnel.

Optionally, the BGP message or the PCEP message may include: the first TLV corresponding to each segment routing list in the policy of the data tunnel. The first TLV may be used to indicate whether the data forwarding path indicated by the corresponding segment routing list is a path that allows adjustment.

The structure of the first TLV may be as shown in FIG. 11 , and the first TLV may include: a type field, a length field and a reserved field arranged in sequence, wherein the type field is used to indicate the type of the first TLV, and the length field is used to indicate the type of the first TLV. In order to indicate the length of all fields following the length field (such as the length of the reserved field), the reserved field may be used to indicate whether the data forwarding path corresponding to the first TLV is a path that allows adjustment. Further, the reserved field may include 8 bits (such as bit 0 to bit 7), and the first bit in the 8 bits may be used to indicate: the data forwarding path corresponding to the first TLV Whether the path is allowed to adjust. For example, when the value of the first bit is 0, the first bit is used to indicate that the data forwarding path corresponding to the first TLV is not a path that allows adjustment; when the value of the first bit is 1 , the first bit is used to indicate that the data forwarding path corresponding to the first TLV is a path that allows adjustment. Or, when the value of the first bit is 1, the first bit is used to indicate that the data forwarding path corresponding to the first TLV is not a path that allows adjustment; when the value of the first bit is 0 , the first bit is used to indicate that the data forwarding path corresponding to the first TLV is a path that allows adjustment.

Please continue to refer to FIG. 11 , the first TLV may further include other fields, such as a sub-TLV (sub-TLV) in FIG. 9 , which is not limited in this embodiment of the present application.

Optionally, if the forwarding node switches the data forwarding path from the first forwarding path to the second forwarding path by switching the first data tunnel to the second data tunnel, the BGP message or the PCEP message may further include: A second TLV, which may indicate whether the data tunnel is allowed to adjust. When the second TLV in the BGP message or PCEP message for delivering the first data tunnel is used to indicate that the first data tunnel allows adjustment, and the second TLV in the BGP message or PCEP message for delivering the second data tunnel When used to instruct the second data tunnel to allow adjustment, the forwarding node may switch the first data tunnel to the second data tunnel.

The structure of the second TLV may be as shown in FIG. 12 , the second TLV may include: a type field, a length field, a flag field, a reserved field and a priority (Preference) field arranged in sequence, wherein the type field is used to indicate The type of the second TLV, the length field is used to indicate the length of all fields following the length field (such as the length of the flag field, the reserved field and the priority field), and the reserved field can be used to indicate whether the data tunnel allows adjustment. Further, the reserved field may include 8 bits (eg, bit 0 to bit 7), and the first bit of the 8 bits may be used to indicate whether the data tunnel allows adjustment. For example, when the value of the first bit is 0, the first bit is used to indicate that the data tunnel does not allow adjustment; when the value of the first bit is 1, the first bit is used for Indication: The data tunnel allows tuning. Or, when the value of the first bit is 1, the first bit is used to indicate that the data tunnel does not allow adjustment; when the value of the first bit is 0, the first bit is used for Indication: The data tunnel allows tuning.

Optionally, the head nodes of the first forwarding path and the second forwarding path (or the third forwarding path) in the foregoing embodiment may be the same (for example, both are the foregoing forwarding nodes), and the tail nodes may be the same. In other possible situations, it is not excluded that the head nodes and tail nodes of these forwarding paths may be different in some scenarios, but at least they can be associated based on some indication relationships, so that the forwarding node can determine that the first forwarding can be forwarded. The path is switched to the second forwarding path.

In the above embodiments, a communication system including a plurality of nodes and a controller is taken as an example. Optionally, the embodiment of the present application can also be used in a communication system that does not include a controller. In this case, the path adjustment method does not include the above implementation. The action associated with the controller in the example. For example, the path adjustment method does not include S101 and S105 in the embodiment shown in FIG. 4 .

The first forwarding path may be a path in a data tunnel (eg, the first data tunnel), or may not be a path in the data tunnel.

When the first forwarding path is a path in the first data tunnel, the forwarding node may switch the first forwarding path to a second forwarding path with reference to the foregoing embodiment, and the second forwarding path may be a path in the first data tunnel, or It may be the path in the second data tunnel determined according to the upper-layer service, or may be the path calculated by the forwarding node. Alternatively, the forwarding node can reduce the proportion of data forwarded on the first forwarding path with reference to the above-mentioned embodiment, and correspondingly, the forwarding node can also increase the proportion of data forwarded on some data forwarding paths in the first data tunnel.

When the first forwarding path is not the path in the data tunnel, the forwarding node may obtain the second forwarding path by calculating, and switch the first forwarding path to the second forwarding path, or the forwarding node may reduce the forwarding path on the first forwarding path proportion of the data.

To sum up, in the path adjustment method provided by the embodiment of the present application, the forwarding node can switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path does not meet the preset condition, or reduce the data The transmission ratio on the first forwarding path, so as to realize the adjustment of the first forwarding path. Thus, the problem of low forwarding quality caused by at least part of the data being forwarded on the first forwarding path whose bit error index does not meet the preset condition is avoided or alleviated.

The path adjustment method provided by the present application is described in detail above with reference to FIG. 1 to FIG. 12 . It can be understood that, in order to implement the functions described in the above methods, the forwarding node and the controller need to include hardware corresponding to each function. and/or software modules. In conjunction with the execution process of each method described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different ways to implement the described functionality for each particular application in conjunction with the embodiments, but such implementations should not be considered beyond the scope of this application.

In this embodiment, the corresponding device may be divided into functional modules according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic, and specifically as a possible division manner of logical functions, there may be other division manners in actual implementation.

When the functional module division method is adopted, the path adjustment device provided by the present application will be described below with reference to FIG. 13 and FIG. 14 .

FIG. 13 is a block diagram of a path adjustment apparatus provided by an embodiment of the present application, and the path adjustment apparatus may be, for example, a forwarding node in the foregoing embodiments. As shown in FIG. 13 , the path adjustment apparatus includes: a forwarding module 1201 and a first adjustment module 1202 .

The forwarding module 1201 is configured to forward data using the first forwarding path; the operations performed by the forwarding module 1201 may refer to S102 in the embodiment shown in FIG. .

The first adjustment module 1202 is configured to switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path does not meet a preset condition, or reduce data on the first forwarding path The transmission ratio of , wherein the path adjustment device is a node on the first forwarding path. For operations performed by the first adjustment module 1202, reference may be made to S104 in the embodiment shown in FIG. 4 , or other contents related to adjusting the first forwarding path in the above embodiments.

In the path adjustment device provided by the present application, the first adjustment module can switch the first forwarding path to the second forwarding path according to the error index of the first forwarding path does not meet the preset condition, or reduce the number of data in the first forwarding path on the transmission ratio to realize the adjustment of the first forwarding path. Thus, the problem of low forwarding quality caused by at least part of the data being forwarded on the first forwarding path whose bit error index does not meet the preset condition is avoided or alleviated.

In addition, the forwarding node can adjust the first forwarding path without the aid of a controller. Therefore, the path adjustment method provided by the present application has higher efficiency in adjusting the path and stronger timeliness. Moreover, since the path adjustment process is allowed to be completed independently by the forwarding node, the load of the controller is also reduced, and the occurrence of the overload of the controller is avoided.

Optionally, the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different data tunnels. When the first forwarding path and the second forwarding path belong to the same data tunnel, the first adjustment module 1202 in the path adjustment apparatus may switch the first forwarding path to the second forwarding path according to the policy of the data tunnel. When the first forwarding path and the second forwarding path belong to different data tunnels (for example, the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel), the first adjustment module 1202 may The tunnel is switched to the second data tunnel, so that the data forwarding path is switched from the first forwarding path to the second forwarding path.

Optionally, the path adjustment apparatus further includes: a calculation module (not shown in FIG. 13 ), configured to calculate (eg, calculate based on IGP) the second forwarding path. In this case, when the forwarding node determines that the bit error index of the first forwarding path does not meet the preset condition, it can calculate the second forwarding path, and then switch the first forwarding path to the second forwarding path. This process does not need to rely on Therefore, the timeliness of switching the first forwarding path to the second forwarding path is relatively high. Moreover, the forwarding node may be any node on the first forwarding path, such as a head node or an intermediate node. The second forwarding path may be a path in the data tunnel, or may not be a path in the data tunnel, which is not limited in this embodiment of the present application. For operations performed by the computing module, reference may be made to the content related to computing the second forwarding path in the above embodiments.

Optionally, the first forwarding path belongs to the first data tunnel, the second forwarding path belongs to the second data tunnel, and the path adjustment apparatus further includes: a first sending module and a receiving module (neither shown in FIG. 13 ) out). The first sending module is configured to send a switching request message for requesting switching of the first data tunnel to the controller; the receiving module is configured to receive a switching response message from the controller, where the switching response message is used to indicate the use of The second data tunnel forwards the data; the first adjustment module 1202 is configured to: switch the first forwarding path to the second forwarding path in the second data tunnel to forward the data. For the operation performed by the first sending module, reference may be made to the content related to sending the handover request message to the controller in the above embodiment. For operations performed by the receiving module, reference may be made to the content related to the handover response message sent by the receiving controller in the above embodiments.

Optionally, the request message is a BGP message.

Optionally, the path adjustment device further includes: a second sending module (not shown in FIG. 13 ), configured to send the error code to the controller according to the error code index of the first forwarding path not meeting a preset condition message, where the bit error message is used to announce bit error information associated with the first forwarding path. Exemplarily, the bit error information may include: a bit error indicator of the first forwarding path does not meet a preset condition, an errored link in the first forwarding path, and an errored link in the first forwarding path that does not meet the preset condition. , and/or, the adjustment status of the first forwarding path by the forwarding node (for example, the forwarding node switches the first forwarding path to the second forwarding path), etc. Since the forwarding node in the embodiment of the present application can notify the controller of the bit error information associated with the first forwarding path, the controller can forward the network topology of the node and the data laid out on multiple nodes according to the bit error information. Path management, and the controller can refer to the bit error information to lay out other data forwarding paths, so as to try to avoid that the bit error indicators of the other data forwarding paths laid out do not meet the preset conditions. For operations performed by the second sending module, reference may be made to the content related to sending the error message to the controller in the above embodiments.

Optionally, the path adjustment apparatus includes: an obtaining module (not shown in FIG. 13 ), configured to obtain a path indication of one or more paths that allow adjustment, the one or more paths include: at least one path with different forwarding paths; the first adjustment module 1202 is configured to: determine the second forwarding path from the at least one path different from the first forwarding path according to the path indication, and adjust the The first forwarding path is switched to the second forwarding path; or, according to the path indication, a third forwarding path is determined from the at least one path different from the first forwarding path, and the data is The transmission ratio on the first forwarding path is increased, and the transmission ratio of the data on the third forwarding path is increased. In the present application, whether the second forwarding path and the third forwarding path belong to the paths allowed to be adjusted can be set as required, so the flexibility of path adjustment can be improved.

Optionally, the path adjustment apparatus includes: an obtaining module (not shown in FIG. 13 ), configured to obtain a path indication of one or more paths that allow adjustment; the first adjustment module 1202 is configured to: according to the One or more paths that are allowed to be adjusted include the first forwarding path, and the first forwarding path is switched to a second forwarding path; or, one or more paths that are allowed to be adjusted include the first forwarding path , reducing the proportion of data transmission on the first forwarding path. It can be seen that, before adjusting the first forwarding path, the forwarding node can also determine whether the first forwarding path belongs to the path that allows adjustment, and only performs the first forwarding path when it is determined that the first forwarding path belongs to the path that allows adjustment. Adjustment. When the first forwarding path has certain requirements on data forwarding quality, one or more paths that are allowed to be adjusted may include the first forwarding path; when the first forwarding path does not require data forwarding quality, one or more paths that are allowed to be adjusted The path may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node.

For operations performed by the obtaining module in this embodiment of the present application, reference may be made to the content related to obtaining the path indication in the above embodiments.

Optionally, the first forwarding path belongs to a path in the SRv6 policy or the SR-TE policy, and the first adjustment module 1202 is configured to: switch the first forwarding path to the SRv6 policy or the SR-TE policy The second forwarding path in the TE policy, wherein the first forwarding path and the second forwarding path are different candidate paths in the SRv6 policy or the SR-TE policy, or are determined by the SRv6 policy Or different segment routing lists in the same candidate path in the SR-TE policy indicate; optionally, the second forwarding path may be a candidate with the highest priority except the first forwarding path in the first data tunnel path. Alternatively, the first adjustment module 1202 is configured to: reduce the transmission ratio of data on the first forwarding path, and increase one or more candidate paths that belong to the same candidate path as the first forwarding path and are indicated by other segment lists The ratio of the transmission of the data on the paths. In this case, the first forwarding path and the second forwarding path are data forwarding paths indicated by different segment routing lists in the same candidate path in the policy of the first data tunnel.

Optionally, the path adjustment device further includes: a second adjustment module (not shown in FIG. 13 ). The second adjustment module is configured to: switch the second forwarding path back to the first forwarding path according to the bit error index of the first forwarding path meeting a preset condition; or, according to the error of the first forwarding path If the bit error indicator meets the preset condition, the transmission ratio of the data on the first forwarding path is restored. For operations performed by the second adjustment module, reference may be made to the content related to the function of the second adjustment module in the above embodiments.

In the case of using an integrated unit, the path adjustment apparatus for a forwarding node provided by the present application may include a processing module, a storage module and a communication module. The processing module may be used to control and manage the actions of the path adjustment apparatus, for example, may be used to support the path adjustment apparatus to perform the actions performed by the forwarding nodes in S101 to S107 above. The storage module may be used to support the execution of the path adjustment apparatus to store program codes and data, and the like. The communication module can be used for communication between the path adjustment device and other devices.

The processing module may be a processor or a controller. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, and the like. The storage module may be a memory. The communication module may specifically be a device that interacts with other electronic devices, such as a radio frequency circuit, a Bluetooth chip, and a Wi-Fi chip.

In one embodiment, when the processing module is a processor, the storage module is a memory, and the communication module is a communication interface, the path adjustment apparatus involved in this embodiment may be a network device having the structure shown in FIG. 3 . In an implementation manner, the above-mentioned adjustment modules, calculation modules, etc. included in the device may be computer programs stored in the memory, and are called by the processor to implement the corresponding execution functions of the modules.

FIG. 14 is a block diagram of another path adjustment apparatus provided by an embodiment of the present application, and the path adjustment apparatus may be, for example, the controller in the foregoing embodiments. As shown in FIG. 14 , the path adjustment apparatus includes: a first sending module 1301 and a first receiving module 1302 .

The first sending module 1301 is configured to send an indication message to the forwarding node, where the indication message is used to instruct the forwarding node to determine to use the first forwarding path to forward data. For operations performed by the first sending module 1301, reference may be made to S101 in the embodiment shown in FIG. 4 .

The first receiving module 1302 is configured to receive a bit error message sent by the forwarding node, where the bit error message is used to announce bit error information associated with the first forwarding path. For operations performed by the first receiving module 1302, reference may be made to the content related to the controller in S105 in the embodiment shown in FIG. 4 .

In the path adjustment device provided in the embodiment of the present application, the first receiving module can receive the error message sent by the forwarding node and used to announce the error information associated with the first forwarding path. Therefore, the path adjustment device can The information manages the network topology of the node and the data forwarding paths laid out on multiple nodes, and the path adjustment device can refer to the bit error information to lay out other data forwarding paths, so as to avoid the bit error indicators of other data forwarding paths laid out as much as possible. The preset conditions are not met.

Optionally, the path adjustment apparatus further includes: a second receiving module (not shown in FIG. 14 ), configured to receive a handover request message sent by the forwarding node; a second sending module (not shown in FIG. 14 ) is used to send a handover response message to the forwarding node according to the handover request message, where the handover response message is used to instruct the forwarding node to determine to use the second forwarding path to forward the data, and the second forwarding path is the The forwarding node determines the forwarding path to use after switching the first forwarding path. It can be seen that when the first forwarding path belongs to the first data tunnel and the second forwarding path belongs to the second data tunnel, the second data tunnel may be a data tunnel planned by the path adjustment apparatus. The forwarding node may determine the second data tunnel by means of the path adjustment device, and then switch the first forwarding path to the second forwarding path in the second data tunnel. For the operations performed by the second receiving module, reference may be made to the content related to the function of the second receiving module in the foregoing embodiment; for the operation performed by the second sending module, reference may be made to the content related to the function of the second sending module in the foregoing embodiment. content.

Optionally, the handover request message is a BGP message.

Optionally, the path adjustment apparatus includes: a third sending module (not shown in FIG. 14 ), configured to send a path indication of one or more paths that allow adjustment to the forwarding node, so as to indicate to the forwarding node The path adjustment is performed according to the path indication. The path adjustment device in the present application can set a path that is allowed to be adjusted as required, so the flexibility of path adjustment can be improved. When the first forwarding path has certain requirements for data forwarding quality, one or more paths set by the path adjustment device that allow adjustment may include the first forwarding path; when the first forwarding path does not require data forwarding quality, the path adjustment One or more paths set by the device to allow adjustment may not include the first forwarding path. In this way, when the first forwarding path does not require data forwarding quality, the load increase caused by the forwarding node adjusting the first forwarding path can be avoided, thereby reducing the load of the forwarding node. For the operation performed by the third sending module, reference may be made to the content related to the function of the third sending module in the foregoing embodiment.

In the case of using an integrated unit, the path adjustment apparatus for a controller provided by the present application may include a processing module, a storage module and a communication module. The processing module may be used to control and manage the actions of the path adjustment apparatus, for example, may be used to support the path adjustment apparatus to perform the actions performed by the controller in S101 to S107 above. The storage module may be used to support the execution of the path adjustment apparatus to store program codes and data, and the like. The communication module can be used to support the communication between the path adjustment device and other devices.

For the processing module, the storage module, and the communication module, reference may be made to the processing module, the storage module, and the communication module in the above-mentioned path adjustment device for a controller, which will not be repeated in this embodiment of the present application.

In one embodiment, when the processing module is a processor, the storage module is a memory, and the communication module is a communication interface, the path adjustment apparatus involved in this embodiment may be a network device having the structure shown in FIG. 3 .

An embodiment of the present application provides a communication system. The structure of the communication system may be as shown in FIG. 1 , and the communication system may include: a plurality of nodes. At least some of the nodes are located on the first forwarding path, and the forwarding node is any node on the first forwarding path. For the function of the forwarding node, reference may be made to the corresponding functions described in the foregoing embodiments. This embodiment of the present application I won't go into details here.

An embodiment of the present application provides another communication system, and the structure of the communication system may be as shown in FIG. 2 , and the communication system may include: a plurality of nodes and a controller. At least some of the nodes in the plurality of nodes are located on the first forwarding path, and the forwarding node is any node on the first forwarding path. For the functions of the forwarding node and the controller in the system, reference may be made to the corresponding functions described in the foregoing embodiments, which will not be repeated in the embodiments of the present application.

An embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used to execute the method used by a forwarding node in any path adjustment method provided by the embodiment of the present application.

Embodiments of the present application provide another computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used to execute the method used by the controller in any of the path adjustment methods provided by the embodiments of the present application.

The embodiments of the present application provide a computer program product containing instructions, when the computer program product is run on a path adjustment device, the path adjustment device is made to execute the forwarding node for executing any of the path adjustment methods provided by the embodiments of the present application. method.

The embodiments of the present application provide a computer program product containing instructions, when the computer program product runs on the path adjustment device, the path adjustment device is made to execute the method used by the controller in any of the path adjustment methods provided in the embodiments of the present application .

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product comprising one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website, computer, server, or data The center transmits to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (eg, solid state drives), and the like.

In this application, the terms "first" and "second" etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance. The term "at least one" refers to one or more, and "plurality" refers to two or more, unless expressly limited otherwise.

Different types of embodiments such as method embodiments and device embodiments provided in the embodiments of the present application may refer to each other, which is not limited in the embodiments of the present application. The sequence of operations of the method embodiments provided in the embodiments of the present application can be appropriately adjusted, and the operations can also be increased or decreased according to the situation. All methods should be covered within the protection scope of the present application, and therefore will not be repeated here.

In the corresponding embodiments provided in the present application, it should be understood that the disclosed systems, devices, and apparatuses, etc., may be implemented by other structural manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical or other forms.

Units described as separate components may or may not be physically separated, and components described as units may or may not be physical units, and may be located in one place or distributed to multiple devices. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed in the present application. Modifications or substitutions shall be covered by the protection scope of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A path adjustment method, characterized in that the method is performed by a forwarding node, and the method includes:

forwarding data using the first forwarding path;

According to the error indicator of the first forwarding path not meeting the preset condition, the first forwarding path is switched to the second forwarding path, or the transmission ratio of data on the first forwarding path is reduced, wherein the The forwarding node is a node on the first forwarding path.
The method according to claim 1, wherein the first forwarding path includes at least one error link, the error link is a link with an error, and the second forwarding path does not include all one or more of the at least one errored link.
The method according to claim 1 or 2, wherein the first forwarding path includes at least one error link, the error link is a link with error, and the first forwarding path includes at least one error link. The bit error indicators do not meet the preset conditions, including:

The at least one error index corresponding to the at least one error link does not meet the preset condition.
The method according to claim 3, wherein the at least one error indicator corresponding to the at least one error link does not meet a preset condition, comprising:

One or more of the at least one bit error indicator does not meet the preset condition; or,

The statistical value of the at least one error index corresponding to the at least one error link does not meet the preset condition.
The method according to claim 4, wherein the at least one bit error indicator is at least one bit error rate,

One or more of the at least one bit error index does not meet the preset condition, including: one or more of the at least one bit error rate does not meet the bit error rate threshold; or,

The statistical value of the at least one bit error indicator corresponding to the at least one bit error link does not meet the preset condition, including: the number of the at least one bit error rate that does not meet the bit error rate threshold exceeds the preset value, or, The accumulated sum of the at least one bit error rate does not meet the preset value.
The method according to any one of claims 1 to 5, wherein the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to Different data tunnels.
The method according to any one of claims 1 to 6, wherein before switching the first forwarding path to the second forwarding path, the method further comprises:

The second forwarding path is calculated.
The method according to claim 6, wherein the first forwarding path belongs to a first data tunnel, the second forwarding path belongs to a second data tunnel, and the first forwarding path is switched to the second forwarding Before the path, the method further includes:

sending a handover request message for requesting handover of the first data tunnel to the controller;

receiving a handover response message from the controller, the handover response message being used to indicate that the data is to be forwarded using the second data tunnel;

The switching of the first forwarding path to the second forwarding path includes:

Switching the first forwarding path to the second forwarding path in the second data tunnel to forward the data.
The method according to claim 8, wherein the request message is a Border Gateway Protocol (BGP) message.
The method according to any one of claims 1 to 9, wherein the method further comprises:

According to the code error indicator of the first forwarding path not meeting the preset condition, a code error message is sent to the controller, where the code error message is used to announce the code error information associated with the first forwarding path.
The method according to any one of claims 1 to 10, wherein the method further comprises:

Obtaining a path indication of one or more paths that allow adjustment, the one or more paths include: at least one path different from the first forwarding path;

The switching of the first forwarding path to the second forwarding path includes:

Determine the second forwarding path from the at least one path different from the first forwarding path according to the path indication, and switch the first forwarding path to the second forwarding path;

Or, reducing the proportion of data transmission on the first forwarding path, including:

A third forwarding path is determined from the at least one path different from the first forwarding path according to the path indication, the transmission ratio of the data on the first forwarding path is reduced, and the data on the first forwarding path is increased. Describe the transmission ratio on the third forwarding path.
The method according to any one of claims 1 to 11, wherein the method further comprises:

Get a path indication of one or more paths that are allowed to adjust;

The switching of the first forwarding path to the second forwarding path includes:

According to the one or more paths that are allowed to be adjusted, including the first forwarding path, switch the first forwarding path to a second forwarding path;

Or, reducing the proportion of data transmission on the first forwarding path, including:

The one or more paths adjusted according to the permission include the first forwarding path, and the transmission ratio of data on the first forwarding path is reduced.
The method according to claim 11 or 12, wherein the path indication is carried in a Border Gateway Protocol BGP message or a Path Computation Element Communication Protocol PCEP message sent by the controller to the forwarding node.
The method according to any one of claims 1 to 13, wherein the head nodes of the first forwarding path and the second forwarding path are the forwarding nodes, and the first forwarding path and the second forwarding path are the head nodes of the forwarding node. The tail nodes of the forwarding path are the same.
The method according to claim 14, wherein the first forwarding path belongs to the path in the segment routing policy SRv6 policy or the segment routing traffic engineering policy SR-TE policy based on the sixth version of the Internet Protocol,

The switching the first forwarding path to the second forwarding path includes: switching the first forwarding path to the second forwarding path in the SRv6 policy or the SR-TE policy, wherein the first forwarding path is A forwarding path and the second forwarding path are different candidate paths in the SRv6 policy or the SR-TE policy, or routed by different segments in the same candidate path in the SRv6 policy or the SR-TE policy list segment list indication; or,

The reducing the transmission ratio of data on the first forwarding path includes: reducing the transmission ratio of data on the first forwarding path, and increasing the candidate path that belongs to the same candidate path as the first forwarding path and is replaced by other segments. The proportion of the data transmitted on one or more paths indicated by list.
The method according to any one of claims 1 to 15, wherein,

After switching the first forwarding path to the second forwarding path, the method further includes: switching the second forwarding path back to the first forwarding path according to the error indicator of the first forwarding path meeting a preset condition a forwarding path; or,

After reducing the transmission ratio of the data on the first forwarding path, the method further includes: according to the bit error indicator of the first forwarding path meeting a preset condition, restoring the transmission of the data on the first forwarding path Proportion.
A path adjustment method, characterized in that the method is executed by a controller, and the method includes:

sending an indication message to the forwarding node, where the indication message is used to instruct the forwarding node to determine to use the first forwarding path to forward data;

A bit error message sent by the forwarding node is received, where the bit error message is used to announce bit error information associated with the first forwarding path.
The method of claim 17, wherein the method further comprises:

receiving a handover request message sent by the forwarding node;

Send a handover response message to the forwarding node according to the handover request message, where the handover response message is used to instruct the forwarding node to determine to use a second forwarding path to forward the data, and the second forwarding path is the forwarding node After switching the first forwarding path, the used forwarding path is determined.
The method according to claim 18, wherein the handover request message is a Border Gateway Protocol (BGP) message.
The method according to any one of claims 17 to 19, wherein the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different A data tunnel; the second forwarding path is a forwarding path determined to be used by the forwarding node after switching the first forwarding path.
The method according to any one of claims 17 to 20, wherein the method comprises: sending a path indication of one or more paths that are allowed to be adjusted to the forwarding node, so as to instruct the forwarding node to follow the path Indicates a path adjustment.
The method according to claim 21, wherein the path indication is carried in the indication message.
A communication system, characterized in that the communication system comprises: a controller and a forwarding node;

The controller is configured to: send a path indication message to the forwarding node;

The forwarding node is configured to: after determining to use the first forwarding path to forward data according to the message, switch the first forwarding path to the second forwarding path according to that the bit error indicator of the first forwarding path does not meet a preset condition A forwarding path, or reducing the proportion of data transmission on the first forwarding path, where the forwarding node is a node on the first forwarding path.
The communication system according to claim 23, wherein the first forwarding path includes at least one error link, the error link is a link with an error, and the second forwarding path does not include one or more of the at least one error link.
The communication system according to claim 23 or 24, wherein the first forwarding path and the second forwarding path belong to the same data tunnel, or the first forwarding path and the second forwarding path belong to different data tunnel.
The communication system according to any one of claims 23 to 25, wherein the forwarding node is further configured to: calculate the second forwarding path.
A network device, characterized in that the network device comprises: a processor and a memory, and a program is stored in the memory;

The processor is configured to call a program stored in the memory, so that the network device executes the path adjustment method according to any one of claims 1 to 16;

Alternatively, the processor is configured to call a program stored in the memory, so that the network device executes the path adjustment method according to any one of claims 17 to 22.
A computer storage medium, wherein a computer program is stored in the storage medium, and the computer program is used to execute the path adjustment method according to any one of claims 1 to 16, or the computer program is used to The path adjustment method described in any one of claims 17 to 22 is executed.
A computer program product, characterized in that, when the computer program product runs on a path adjustment device, the path adjustment device is made to execute the path adjustment method of any one of claims 1 to 16; When the computer program product runs on the path adjustment device, the path adjustment device causes the path adjustment device to execute the path adjustment method of any one of claims 17 to 22.