WO2013185497A1

WO2013185497A1 - Service processing method and network equipment for ring network

Info

Publication number: WO2013185497A1
Application number: PCT/CN2013/072456
Authority: WO
Inventors: 叶剑; 孙光辉; 蔡亨光; 张文洋; 杨炀
Original assignee: 华为技术有限公司
Priority date: 2012-06-11
Filing date: 2013-03-12
Publication date: 2013-12-19
Also published as: CN102801596B; JP5903192B2; CN102801596A; JP2015523793A

Abstract

The invention provides a service processing method and network equipment for a ring network. The method comprises the following steps of: acquiring unreachable node information by a first node in the ring network; according to the acquired unreachable node information, determining a suppressed service in local service information; and suppressing the determined suppressed service. The network equipment comprises an acquisition module, a determination module and a suppression module. An unreachable service is suppressed, so that an additional protecting channel bandwidth can be prevented from being occupied, and influence on other reachable services is maximally reduced.

Description

Service processing method and network equipment in the ring network This application claims priority to the Chinese Patent Application submitted to the China Patent Office on June 11, 2012, with the application number 201210190002.2, and the invention titled "Service Processing Method and Network Equipment in the Ring Network" The entire contents of which are incorporated herein by reference.

TECHNICAL FIELD The present invention relates to communications technologies, and in particular, to a service processing method and a network device in a ring network. Background technique

With the development of multi-protocol label switching (referred to as Multi Protocol Label Switching, MPLS for short), in order to enhance the reliability of the network, various MPLS ring network protection methods have emerged, which can be included in each protection method. The wrapping switching method and the steering switching method. For example, in the case that the ring network works normally, the transmission path of the service in the ring network is as shown in Figure 1a. When there is a fault between node 4 and node 3 in the ring network, the winding switching mode will be switched according to the path shown by the dotted line in Figure lb, and the steering switching mode will be switched according to the path shown by the dotted line in Figure lc.

Whether it is the wrapping switching mode or the steering switching mode, when the upper ring service node or the lower ring service node in the ring network fails, or the upper ring service node or the lower ring service node is isolated due to the peripheral fault, it will appear. The following problems occur: The service is not properly connected, but the MPLS ring network protection is still switched. The traffic of the unreachable service is still forwarded on each node of the ring network, occupying the bandwidth of other services that can be normally connected. Summary of the invention

In order to prevent the traffic of the unreachable service from occupying the bandwidth and affecting other reachable services, the present invention provides a service processing method in the ring network, including:

The first node in the ring network obtains unreachable node information;

Determining the suppressed service in the local service information according to the obtained unreachable node information; suppressing the determined suppressed service.

In another aspect, the present invention also provides a network device, including:

Obtaining a module, configured to obtain unreachable node information, and send the unreachable node information to Determining module

The determining module is configured to determine, according to the unreachable node information obtained by the obtaining module, the suppressed service in the local service information, and send the determined suppressed service to the pressing module; Pressing is performed according to the suppressed business determined by the determining module. The beneficial effects of the present invention are: By suppressing the unreachable services, the bandwidth of the extra protection channel is avoided, and the impact on other reachable services is minimized. DRAWINGS

Figure la is a schematic diagram of the transmission path of the service in the ring network in the case that the ring network works normally; Figure lb is a schematic diagram of the service path of the wrapping switching mode in the case of a ring network failure; Figure lc shows the steering switch in the case of a ring network failure FIG. 2 is a flowchart of a service processing method in a ring network according to an embodiment of the present invention;

3a and 3b are schematic diagrams of fault points in an embodiment of the present invention;

4a and FIG. 4b are schematic diagrams showing a method for obtaining fault point information according to an embodiment of the present invention; FIG. 5a is a schematic diagram of obtaining a topology of a ring network in a static manner according to an embodiment of the present invention; FIG. 5b is a dynamic diagram of an embodiment of the present invention; FIG. 6 is a schematic diagram of a format of an APS protocol packet according to an embodiment of the present invention;

FIG. 7 is a flowchart of obtaining a ring network topology in a dynamic manner according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a ring network service according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an obtaining module according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an obtaining module according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a fault point information obtaining unit according to an embodiment of the present invention; FIG. 13 is a schematic structural diagram of a topology obtaining unit according to an embodiment of the present invention; FIG. 14 is a dynamic subunit according to an embodiment of the present invention; Schematic diagram of the structure;

FIG. 15 is a schematic structural diagram of a pressing module according to an embodiment of the present invention; FIG.

FIG. 16 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIG. 19 is a schematic structural diagram of a network device according to an embodiment of the present invention. detailed description

FIG. 2 is a flowchart of a service processing method in a ring network according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

100. The first node in the ring network obtains unreachable node information.

101. The first node determines the squelched service in the local service information according to the obtained unreachable node information.

102. The first node suppresses the determined suppressed service.

The first node is a proxy, and can refer to any node in the ring network.

Optionally, since the node adjacent to the faulty node/failed link is the node that first learns that its neighboring node/adjacent link is faulty, the first node may specifically refer to the faulty node/failed link. Neighboring node. In this case, suppressing the determined suppressed service on the node adjacent to the faulty node/fault link can reduce the number of nodes in the ring network that suppress the service, so that as many nodes as possible can focus on Normal business forwarding.

Optionally, the first node in the ring network obtains the unreachable node information (100), and may include: the first node starts from itself, and searches for the faulty node according to the first direction of the ring network; After finding a faulty node (hereinafter referred to as: the first faulty node), starting from the first faulty node, searching for the faulty node according to the second direction of the ring network, until the faulty node is first found in the second direction (after The second fault node), wherein the second direction is the opposite direction of the first direction; for example, the clockwise direction may be the first direction, the counterclockwise direction may be the second direction, or the counterclockwise direction may be used as The first direction, the clockwise direction as the second direction, and the like. In the first direction, from the first fault node to the second fault node, the node between them is an unreachable node.

Optionally, the foregoing first node searching for the faulty node may be: searching for the faulty node according to the ring topology and the fault point information.

Optionally, after the first node finds the first fault node, and searches for the second fault node according to the second direction, the node information that is searched may also be recorded.

For example, the first node starts from itself and determines whether the node information of each node in the ring network is in the fault point information according to a certain direction (either the first direction or the second direction). If the node information of a node is in the fault point information, the node is a fault node. When the first faulty node is found, Look in the reverse direction and record the found node information. When the second faulty node is found in the opposite direction, the search is stopped, and the second faulty node information is recorded, and the recording of the node information is stopped. At this time, the node corresponding to the recorded node information is a reachable node, and other nodes in the ring network are unreachable nodes. If the first fault node is not found after searching in the first direction until returning to the first node, the search is stopped. At this time, all nodes in the ring network are considered to be reachable nodes.

Optionally, when the fault point is located at a certain node, the fault point information is node information of the node; when the fault point is located on the link, the fault point information is node information of the nodes at both ends of the fault link. For example, in Fig. 3a, if the link between node 2 and node 3 fails, the above-mentioned fault point information refers to node information of node 2 and node 3. The form of the specific fault point information may be expressed as (source node, destination node), or (destination node, source node), etc., to characterize that the link between the source node and the destination node has failed. For example, if the link from node 2 to node 3 fails, the above fault point information may be (2, 3) or (2, 3).

When a link fails (that is, the fault is located on the link), automatic fault switching is performed according to the provisions of the automatic protection switching (English: Automatic Protection Switching, APS for short), and the faulty link is triggered. The node in the end sends the APS protocol packet to the other nodes in the ring network through the first direction and the second direction. The APS protocol packet carries the fault point information. In a ring network, there are two directions from one node to another. The number of nodes passing through in these two directions may be different. The APS protocol packets passing through the path with a large number of nodes may be called the long-path APS protocol. Packets, APS protocol packets passing through a path with a small number of nodes can be called short-path APS protocol packets. As shown in Figure 4a, the node 2 sends an APS protocol packet to the other nodes in the ring network. For example, the signal is invalid (English: Signal Fail, SF for short), and the fault point information carried is (3. 2); Node 3 sends SF packets to other nodes in the ring network, where the fault point information carried is (2, 3). At this time, for node 2, the long-path APS protocol message is the SF (3, 2) sent to node 3 in the counterclockwise direction, and the short-path APS protocol message is the SF sent to node 3 in the clockwise direction. (3, 2). Correspondingly, for node 3, the long-path APS protocol message is SF (2, 3) sent to node 2 in a clockwise direction, and the short-path APS protocol message is sent to node 2 in a counterclockwise direction. ( twenty three ) .

When a node in the ring network fails (that is, the fault point is located at a certain node), the nodes at both ends of the faulty node also send the APS protocol report to the other nodes in the ring network through the first direction and the second direction. And carrying the fault point information, the fault point information is the node identifier of the fault, If the node 3 finds that the node 2 is faulty, the fault point information carried in the APS protocol packet sent by the node 3 is the node identifier of the node 2, as shown in FIG. 3b.

After receiving the APS protocol packets, the first node records the fault point information carried in the APS protocol packet. Since the node adjacent to the fault point sends an APS protocol, the first node may receive multiple APS protocol packets for the same fault point. Optionally, for the received APS protocol packet, if the fault point information is the same, record the fault point information carried in any APS protocol packet. The information about the fault points mentioned above is the same, and may include the same situation or the opposite of the source node and the destination node. For example, fault point information characterized as (3, 2) and (2, 3) is considered to be the same.

In a ring network, multiple faults may occur simultaneously or sequentially. According to the APS protocol, each fault triggers automatic fault switchover. Optionally, in some scenarios, the priority of the fault switching may be different. For example, an automatically initiated fault switching is performed at a certain moment, and there is a manual operation triggered fault switching, if the manual operation triggers the fault. If the priority of the switchover is higher than the priority of the automatically initiated fault switchover, the automatically initiated fault switchover is considered to be canceled, and the device directly performs the fault switch triggered by the manual operation. In the embodiment of the present invention, this situation is called preemption of failover. Optionally, in other scenarios, one fault switch does not cause another fault switch to be considered canceled. In the embodiment of the present invention, this case is called coexistence of failover.

In the scenario where the fault switching coexists, the first node records the received fault point information. As shown in Figure 4b, in the ring network, the link between node 2 and node 3, and the link between node 3 and node 4 have failed. The node 2 transmits SF(3, 2) to the other nodes through the first direction and the second direction, respectively, and the node 4 transmits the SF (3, 4) to the other nodes through the first direction and the second direction, respectively. When node 1 receives SF (3, 4) and SF (3, 2), it determines that the unreachable node is node 3 and node 4 according to SF (3, 4), and WSF (3, 2) determines that the unreachable node is a node. 3 and node 2, therefore, the fault point information is recorded as (2, 3, 4).

In the scenario of the faulty switchover, the preempted fault switchover is considered to have been canceled. In the ring network, only the APS protocol packet triggered by the fault switch with the highest priority is recorded. The first node records the fault point carried in the APS protocol packet. Information, and clear the previously recorded fault point information.

Optionally, after the fault is rectified, the nodes at both ends of the fault point no longer send APS protocol packets. If the first node does not receive the APS protocol packet carrying the same fault point information again, the fault point may be restored to normal, and the fault point information may be deleted. Optionally, the ring topology can be obtained by, but not limited to, the following two methods:

The first is static. A ring topology is configured on a node in the ring network, such as the first node. For example, when configuring a ring, configure the ring topology in the same direction (such as clockwise or counterclockwise) on each node. As shown in Figure 5a, assuming that the ring network has a total of six nodes and configured in a clockwise direction, the ring network topology on each node is: node 1: 123456, node 2: 234561, node 3: 345612, Nodes 4~6 can be deduced by analogy. The configuration in the counterclockwise direction can be reversed from the clockwise direction configuration, and will not be described here.

The second is dynamic. The first node obtains the topology of the ring network by performing protocol packet exchange with other nodes. As shown in Figure 5b, it can include:

501. The first node receives the first type of long-path APS protocol packet, where the first type of long-path APS protocol packet is from the neighboring node of the first node, the destination node is the first node, and the first type of long-path APS is used. The protocol packet carries the source node information, the destination node information, and the number of nodes through which the long-path APS protocol packet of the first type passes.

Optionally, the format of the long-path APS protocol can be as shown in FIG. 6, where the destination node ID is the destination node ID, the source node ID is the source node ID, the Bridge Request is the bridge request, and the Reserved is the reserved field. In the reserved field, 1~4 bits can be used to record the number of nodes (NodeNum) through which the long-path APS protocol packet passes. Of course, if 1~4 bits are not enough, you can expand several bits to record NodeNum, which is not limited here.

502. Determine the number of nodes in the ring network according to the number of nodes through which the long-path APS protocol packet passes.

For example, the ring network structure shown in FIG. 5a is used as an example. Node 4 sends a long-path APS protocol packet to its neighboring node 3. When the long-path APS protocol packet arrives at the destination node 3, the APS protocol packet is sent. The number of nodes recorded in the reserved field is 5, and node 3 can determine that, in addition to node 3, the ring network also includes 5 nodes.

503. The first node sends and/or receives the second type of long-path APS protocol packet, and records the source node information and the destination node information. The second type of long-path APS protocol packet carries the source node information and the destination node. The information and the number of nodes passing through the second-length long-path APS protocol packet are different from the first-class long-path APS protocol packet, and the destination node of the second-type long-path APS protocol packet is not the first node. It is a node other than the first node in the ring network.

Optionally, when the first node sends the second type long path APS protocol packet, the second type The source node of the long-path APS protocol packet is the first node, and the destination node is the neighboring node of the first node; when the first node receives the second-class long-path APS protocol packet, the second type is long. The source node of the path APS protocol packet is other nodes in the ring network except the first node, and the destination node is a neighboring node of other nodes.

When the first node receives the second type long path APS protocol packet from the other node, the first node adds the number of nodes through which the second type long path APS protocol packet passes and then passes the second node to the next node. Class long path APS protocol packets.

504. The first node determines, according to the determined number of nodes in the ring network, the source node information and the destination node information carried in the first type long path APS packet and the second type long path APS protocol packet, and determines the ring network extension 4 .

The destination node and the source node of the second type of long-path APS protocol packets are adjacent. Therefore, if the first node receives the long-path APS protocol packet sent by all other nodes in the ring network, the first node can carry the long-path APS protocol packet. The source node information and the destination node information determine the ring topology.

For example, still refer to the ring network structure shown in FIG. 5a. Taking node 3 as an example, when node 3 determines that the ring network includes five nodes in addition to itself, it can be known in the ring network. There are 6 nodes.

Therefore, node 3 receives such a long-path APS protocol message of the first type:

The long-path APS message (2, 3) sent by node 2 to node 3 in the counterclockwise direction, and the long-path APS protocol message (4, 3) sent by node 4 to node 3 in the clockwise direction. Node 3 also sends and/or receives such a long-path APS protocol message of the second type: Node 1 sends a long-path APS protocol message (1, 2) to node 2 in a counterclockwise direction, and node 3 is in the shun Long-path APS protocol message (3, 2) sent to node 2 in the clockwise direction;

Node 6 transmits the long-path APS protocol of node 1 in the counterclockwise direction (6, 1), and the long-path APS protocol sent by node 2 to node 1 in the clockwise direction ^2 (1, 1);

The long-path APS protocol message (5, 6) sent by the node 5 to the node 6 in the counterclockwise direction, and the long-path APS protocol sent by the node 1 in the clockwise direction to the node 6 (1, 6);

The long-path APS protocol message (4, 5) sent by the node 4 to the node 5 in the counterclockwise direction, and the long-path APS protocol (6, 5) sent by the node 6 to the node 5 in the clockwise direction;

The node 3 transmits the long-path APS protocol message (3, 4) to the node 4 in the counterclockwise direction, and the node 5 transmits the long-path APS protocol (5, 4) to the node 4 in the clockwise direction. According to the number of nodes in the ring network, the first node can know whether all the first type long path APS protocol messages and the second type long path APS have been sent or received in a certain direction (for example, clockwise direction). The protocol packet, if yes, can determine the ring topology based on the source node information and the destination node information carried in the first type long path APS message and the second type long path APS protocol message. For example, the node 3 records the source node and the destination node information, and the following information can be obtained: Clockwise: (6, 5), (1, 6), (2, 1), (3, 2). ..... , and counterclockwise: (2, 3), (1, 2), (6, 1), (5, 6) .... Thus, node 3 can determine that the ring topology is 345,612 in the clockwise direction and 321654 in the counterclockwise direction.

Optionally, as shown in FIG. 7, based on the foregoing implementation manner, the method may further include:

505. Determine, according to the long-path APS protocol packet in the first direction and the long-path APS protocol packet in the second direction, the topology of the ring network. If the two are different, the configuration of the ring network may be faulty. Generate an alarm.

Optionally, the first node determines, according to the obtained unreachable node information, the suppressed service (101) in the local service information, which may include:

The first node determines, according to the unreachable node information, whether the service of the upper ring node and/or the lower ring node is an unreachable node in the local service information, and if yes, determines that the service is a suppressed service. The local service information may include at least: a service direction, and a service ring node identifier or a service ring node identifier.

Optionally, the first node suppresses the determined suppressed service (102), which may be: based on service channel suppression. The first node suppresses each suppressed service based on the obtained unreachable node information and local business information.

For example, if the lower ring node of the service is unreachable, the service inbound forwarding layer sets an invalid flag bit to discard the service; or, when the first node is the upper ring node of the suppressed service, the The service life of the suppressed service set (English term: Time To Live, referred to as: TTL), wherein the lifetime is less than or equal to a predetermined TTL threshold. By setting up the business to be suppressed

TTL can limit the transmission range of the traffic of the suppressed service in the ring network and reduce the impact on other reachable services.

Optionally, the foregoing TTL threshold may be any of the following values:

1. In the service direction, the hop count from the upper ring node of the suppressed service to the lower ring node;

2. In the opposite direction of the service, the number of hops from the upper ring node of the suppressed service to the lower ring node; 3. N+M, where N is the number of hops from the upper ring node to the lower ring node of the service in the service direction, and M is the number of nodes in the ring network;

4. N+M-2 can be applied to the scenario where the lower ring node has a single point of failure.

5, 2M, can be applied to scenarios that require less network environment.

If the upper ring node of the service is unreachable, send an alarm indication signal (English name: Alarm Indication Signal, AIS for short) or forward defect indication from the outgoing interface of the service (English full name: Forward Defection) Indicator, referred to as: FDI).

Taking Figure 8 as an example, 4, 2, 4 are all entering the ring network at node 1 (node 1 is the upper ring node), and services 1 and 4 are leaving the ring network at node 3 (node 3 is services 1 and 4) The lower ring node), the service 2 leaves the ring network at node 4 (node 4 is the lower ring node of service 2); service 3 enters the ring network at node 2, and leaves the ring network at node 1 (node 2 is the upper ring node of service 3) , node 1 is the lower ring node of service 3), then at node 1, the local service information can be expressed as the content shown in Table 1: Table 1

Among them, In represents the upper ring, Out represents the lower ring; Rw represents the ring working, and Rp represents the ring protecting.

If the unreachable node information obtained by the node 1 is the node 3, then the node 1 determines that the service 1 and the service 4 are the suppressed services. Since the node 3 is the lower ring node of the services 1 and 4, the node 1 can discard the traffic of the received services 1 and 4, for example, the invalidity identifier can be set in the forwarding interface of the service 1 and 4, thereby receiving Traffic to services 1 and 4 will be discarded.

Optionally, the first node suppresses the determined suppressed service (102), which may also be: ring channel based suppression. The first node determines the ring channel (working and protection channel) corresponding to the suppressed service according to the suppressed service, and suppresses the service transmitted by the ring channel corresponding to the suppressed service. For example, an invalid identifier may be set in the ring-channel forwarding layer corresponding to the service to be suppressed, and the service that is forwarded to the ring channel corresponding to the suppressed service is discarded. Compared with the service channel-based suppression mode, the ring channel-based suppression method is more powerful, and the processing efficiency is better when the same ring channel is larger in traffic.

Optionally, the ring network involved in the foregoing embodiment may be an MPLS ring network, or a ring network of other protocols, for example, an elastic packet ring (English full name: Resilient Packet Ring, referred to as: RPR), The embodiment of the invention does not limit this.

One of ordinary skill in the art will appreciate that all or a portion of implementing the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the method includes the above method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The ring network protection-based service processing method provided by the embodiment of the present invention suppresses the unreachable service, avoids occupying additional protection channel bandwidth, and minimizes the impact on other reachable services.

Another embodiment of the present invention provides a network device, which may be the first node in the foregoing method embodiment. Therefore, the network device can perform part or all of the description in the foregoing method embodiments.

As shown in FIG. 9, the network device may include: an obtaining module 900, a determining module 901, and a pressing module 902. The obtaining module 900 is configured to obtain the unreachable node information, and send the unreachable node information to the determining module 901. The determining module 901 is configured to determine, according to the unreachable node information obtained by the obtaining module 900, the suppressed in the local service information. The service sends the determined suppressed service to the pressing module 902; the pressing module 902 is configured to suppress the suppressed service determined by the determining module 901.

Optionally, as shown in FIG. 10, the obtaining module 900 may specifically include: a first searching unit 900a, a second searching unit 900b, and an obtaining unit 900c. The first searching unit 900a is configured to start from the network device itself, find the first faulty node according to the first direction in the ring network, and send the found first faulty node to the second searching unit 900b and The obtaining unit 900c is configured to: after the first faulty node, search for the faulty node according to the second direction, until the second faulty node is found in the second direction, and send the second faulty node to the obtaining unit 900c, The second direction is the opposite direction of the first direction. The obtaining unit 900c is configured to obtain the unreachable node information according to the information sent by the first searching unit 900a and the second searching unit 900b, where, in the first direction, in the first The node between a faulty node and the second faulty node is an unreachable node. Its The first faulty node is a faulty node that is first searched in the first direction, and the second faulty node is a faulty node that is first found in the second direction.

Optionally, as shown in FIG. 11, the obtaining module 900 may further include: a topology obtaining unit 900d, configured to obtain a ring topology; and a fault point information obtaining unit 900e, configured to obtain fault point information. Further, the first searching unit 900a and the second searching unit 900b may search for the first fault node and the second according to the fault point information obtained by the ring topology and the fault point information obtaining unit 900e obtained by the topology obtaining unit 900d. Faulty node.

Optionally, as shown in FIG. 12, the fault point information obtaining unit 900e may include: a receiving subunit 900el, configured to receive an APS protocol packet sent by a neighboring node of the fault point, where the APS protocol packet carries a fault point. The obtaining sub-unit 900e2 is configured to obtain the fault point information from the APS protocol message received by the receiving sub-unit 900el. The sending sub-unit 900e3 is configured to send the fault point information obtained by the obtaining sub-unit 900e2 to the first searching unit. 900a and second lookup unit 900b.

Optionally, as shown in FIG. 13, the topology obtaining unit 900d may include: a static subunit 900dl for statically configuring the ring topology; or a dynamic subunit 900d2 for performing with other nodes in the ring network. The interaction of protocol packets obtains the topology of the ring network. For the sake of simplicity, the above two subunits are shown in Fig. 13 at the same time.

Optionally, as shown in FIG. 14, the dynamic subunit 900d2 may include:

The first processing sub-unit 900d2a is configured to receive the first-type long-path APS protocol packet, and send the number of nodes through which the first-type long-path APS protocol packet passes to the node number determining sub-unit 900d2b. The first type of long-path APS protocol packet is from the neighboring node of the network device, and the destination node is the network device itself, and the first-type long-path APS protocol packet carries the source node information, the destination node information, and the first class. The number of nodes through which the long-path APS protocol packet passes;

The node number determining sub-unit 900d2b is configured to determine the number of nodes in the ring network according to the number of nodes through which the first-type long-path APS protocol packet sent by the first processing sub-unit 900d2a passes, and determine the number of nodes in the ring network. The number of nodes is sent to the ring topology determining subunit;

The second processing sub-unit 900d2c is configured to send and/or receive the second-type long-path APS protocol packet, and record the source node information and the destination node information carried in the second type of APS protocol packet, and the second type long-path APS protocol is used. The source node information and the destination node information carried in the packet are sent to the ring topology determining subunit 900d2d. The second type long path APS protocol packet carries the source node information, the destination node information, and the second type long path APS. The number of nodes through which the protocol packet passes is different from the first type long path APS. The protocol packet, the destination node of the second type long path APS protocol packet is not the network device; the ring topology determining subunit 900d2d is configured to use the number of nodes in the received ring network, and the first type of long path The source node information and the destination node information carried in the APS protocol packet and the second-class long-path APS protocol packet determine the ring topology.

Optionally, the determining module 901 is specifically configured to: determine, according to the unreachable node information, whether the service of the upper ring node and/or the lower ring node is an unreachable node in the local service information; if yes, determine that the service is Suppressed business.

Optionally, as shown in FIG. 15, the pressing module 902 includes: a first pressing unit 902a, configured to suppress the determined suppressed service based on the service channel; or, the second pressing unit 902b, is configured to be based on the ring The channel suppresses the determined suppressed business. For the sake of simplicity, the above two units are shown simultaneously in FIG.

Optionally, if the lower ring node of the service is unreachable, the first suppression unit 902a is specifically configured to:: put an invalid flag on the reversed service inbound interface, discard the suppressed service; or, for the The TTL of the service is set, wherein the TTL is less than or equal to a predetermined TTL threshold; if the upper ring node of the service is unreachable, the first suppression unit 902a is configured to: send the downstream from the outgoing interface direction of the suppressed service The alarm indication information AIS or the forward defect indication FDI.

Optionally, the second pressing unit 902b is specifically configured to: determine, according to the suppressed service, a ring channel corresponding to the suppressed service, and suppress the service transmitted through the ring channel. In an embodiment, the second pressing unit 902b suppresses the traffic transmitted by the ring channel by disposing the invalid identifier in the ring channel forwarding layer and discarding the service forwarded to the ring channel.

FIG. 16 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in FIG. 16, the network device includes a processor 1601. The processor 1601 is configured to obtain the unreachable node information, and determine the suppressed service in the local service information according to the unreachable node information, and suppress the determined suppressed service.

Optionally, the processor 1601 can obtain the unreachable node information by: starting from the network device itself where the processor 1601 is located, searching for the faulty node according to the first direction in the ring network; finding the first in the first direction After the faulty node, starting from the first faulty node, searching for the faulty node according to the second direction until the second faulty node is found in the second direction, the second direction is the opposite direction of the first direction; in the first direction, from the first direction The node between the first fault node and the second fault node is an unreachable node. The first faulty node is the fault that is first found in the first direction. The node, the second fault node is a fault node that is first found in the second direction.

Optionally, the processor 1601 can find the fault node according to the topology and fault point information of the ring network.

Optionally, as shown in FIG. 17, the network device may further include: a receiver 1602, configured to receive an automatic protection switching APS protocol sent by a neighboring node of the fault point, where the APS protocol text carries the fault point information. Correspondingly, the processor 1601 obtains fault point information according to the APS protocol message received in the receiver 1602.

Optionally, as shown in FIG. 18, the network device may further include: a transmitter 1603, configured to cooperate with the receiver 1602 to implement protocol packet interaction with other nodes in the ring network, thereby obtaining a ring network in the processor 1601. Topology.

Optionally, as shown in FIG. 19, the network device may further include: a memory 1604, configured to save the ring topology received by the receiver 1602 and/or the ring topology obtained by the processor 1601.

For example, the receiver 1602 receives the first type of long-path automatic protection switching APS protocol packet, where the first type of long-path APS protocol packet is from a neighboring node of the network device, and the destination node is the network device, and the first type is long. The path APS protocol packet carries the source node information, the destination node information, and the number of nodes through which the first-class long-path APS protocol packet passes. The processor 1601 determines the number of nodes that the first-class long-path APS protocol packet passes. The number of nodes in the ring network; the receiver 1602 sends and/or receives the second type of long-path APS protocol packet, and records the source node information and the destination node information carried in the second-length long-path APS protocol packet; The destination node of the long-path APS protocol packet is not the network device; the second-type long-path APS protocol packet carries the source node information, the destination node information, and the number of nodes through which the second-length long-path APS protocol packet passes; The device 1601 is configured according to the number of nodes in the ring network, and the source node information and the destination node information carried in the first type long path APS protocol packet and the second type long path APS protocol packet. Ring network topology determination.

Optionally, the processor 1601 may determine, according to the unreachable node information, whether the upper ring node and/or the lower ring node are services of the unreachable node in the local service information, and if yes, determine the service. For the business being suppressed.

Optionally, the processor 1601 may compress the determined suppressed service based on the service channel, or suppress the determined suppressed service based on the ring channel.

For example, the pressing of the determined suppressed service based on the service channel may be performed by the processor 1601 according to the obtained unreachable node information and the local service information, and the suppressed service is performed. Suppress. If the lower ring node of the service is unreachable, the processor 1601 sets an invalid flag bit on the reversed service inbound interface, and discards the suppressed service; if the upper ring node of the service is unreachable, the processor 1601 is from the suppressed service. The outgoing interface direction sends an alarm indication information AIS or a forward defect indication FDI to the downstream.

The suppression of the determined suppressed service based on the ring channel may be performed by the processor 1601 determining the ring channel corresponding to the suppressed service according to the suppressed service, and suppressing the service transmitted through the ring channel. For example, the processor 1601 may set an invalid identifier in the ring channel forwarding layer and discard the traffic forwarded to the ring channel.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Rights request

1. A business processing method in a ring network, characterized by including:

The first node in the ring network obtains unreachable node information;

According to the obtained unreachable node information, the suppressed service is determined in the local service information; and the determined suppressed service is suppressed.

2. The method according to claim 1, characterized in that the first node obtains unreachable node information, including:

The first node starts from itself and searches for the fault node in the first direction in the ring network; after finding the first fault node in the first direction, it starts from the first fault node and searches for the fault in the second direction. node, until the second faulty node is found in the second direction, the second direction is the opposite direction to the first direction; the first faulty node is the faulty node found for the first time in the first direction, so The second fault node is the fault node found for the first time in the second direction; in the first direction, starting from the first fault node to the second fault node, the nodes in between are unreachable nodes. .

3. The method according to claim 2, characterized in that, the searching for a fault node includes: the first node searches for the fault node according to the ring network topology and fault point information.

4. The method according to claim 3, characterized in that the fault point information is obtained by the following method:

The first node receives an automatic protection switching APS protocol message sent by a node adjacent to the fault point, and the APS protocol message carries the fault point information.

5. The method according to claim 3, characterized in that the ring network topology is obtained in the following manner:

Configure the ring network topology on the first node; or

The first node obtains the ring network topology by interacting with other nodes in the ring network through protocol text.

6. The method according to claim 5, wherein the first node obtains the ring network topology by interacting with other nodes in the ring network through protocol text, including:

The first node receives the first type of long path automatic protection switching APS protocol message, wherein the first type of long path APS protocol message comes from an adjacent node of the first node, and the destination node is the first node, The first type of long path APS protocol message carries source node information, destination node information and the third The number of nodes that a type of long-path APS protocol packet passes through;

Determine the number of nodes in the ring network according to the number of nodes that the first type of long-path APS protocol message passes through;

The first node sends and/or receives a second type of long path APS protocol message, and records the source node information and destination node information carried in the second type of long path APS protocol message; wherein, the second type of long path APS protocol message carries The path APS protocol message carries source node information, destination node information and the number of nodes that the second type of long path APS protocol message passes through; the destination node of the second type of long path APS protocol message is the first node in the ring network except the first Nodes other than nodes;

The first node determines the ring network based on the number of nodes in the ring network, the source node information and the destination node information carried in the first type of long path APS protocol message and the second type of long path APS protocol message. Topology.

7. The method according to any one of claims 1 to 6, characterized in that, determining the suppressed business in the local business information based on the obtained unreachable node information includes:

The first node determines whether there is a service of the uplink node and/or the downlink node being an unreachable node in the local service information based on the unreachable node information, and if so, determines that the service is a suppressed service. .

8. The method according to any one of claims 1 to 7, characterized in that, suppressing the determined suppressed business includes:

Suppression based on business channels or suppression based on ring channels.

9. The method according to claim 8, characterized in that the suppression based on traffic channels includes:

The first node suppresses the suppressed services based on the obtained unreachable node information and local service information.

10. The method according to claim 9, characterized in that if the downstream node of the service is unreachable, suppressing the suppressed service includes:

The first node sets an invalid flag bit in the forwarding layer of the suppressed service incoming interface and discards the suppressed service; or, sets a time-to-live TTL for the suppressed service, wherein the TTL is less than or equal to Predetermined TTL threshold;

If the uplink node of the service is unreachable, suppressing the suppressed service includes: the first node sends alarm indication information downstream from the outbound interface direction of the suppressed service. AIS or forward defect indication FDI.

11. The method according to claim 8, characterized in that the suppression based on ring channels includes:

The first node determines the ring channel corresponding to the suppressed service according to the suppressed service, and suppresses the service transmitted through the ring channel.

12. The method according to claim 11, characterized in that: suppressing traffic transmitted through the ring channel includes:

An invalid flag is set in the forwarding layer of the ring channel, and services forwarded to the ring channel are discarded.

13. A network device, characterized by including:

Obtain module, used to obtain unreachable node information, and send the unreachable node information to the determination module;

The determination module is configured to determine the suppressed services in the local service information based on the unreachable node information obtained by the obtaining module, and send the determined suppressed services to the suppression module; the suppression module is used Suppressing the suppressed services determined by the determination module.

14. The network device according to claim 13, characterized in that the obtaining module includes: a first search unit, configured to start from the network device itself and search for the first fault node according to the first direction in the ring network. , sending the first fault node to the second search unit and acquisition unit; wherein, the first fault node is the fault node found for the first time in the first direction;

The second search unit is configured to search for the fault node in the second direction starting from the first fault node until the second fault node is found in the second direction, and send the second fault node to the Obtaining unit, the second direction is the opposite direction to the first direction; wherein, the second fault node is the fault node found for the first time in the second direction;

The obtaining unit is configured to obtain unreachable node information according to the information sent by the first search unit and the second search unit, wherein in the first direction, the node between the first fault node and the second fault node is Unreachable node.

15. The network device according to claim 14, characterized in that the obtaining module further includes:

The topology obtaining unit is used to obtain the ring network topology; and the fault point information obtaining unit is used to obtain the fault point information;

The first search unit and the second search unit obtain the The obtained ring network topology and the fault point information obtained by the fault point information obtaining unit are used to search for the first fault node and the second fault node.

16. The network device according to claim 15, characterized in that the fault point information obtaining unit includes:

The receiving subunit is configured to receive automatic protection switching APS protocol messages sent by adjacent nodes of the fault point, where the APS protocol message carries the fault point information;

Obtaining subunit, used to obtain fault point information from the APS protocol message received by the receiving subunit;

The sending subunit is used to send the fault point information obtained by the obtaining subunit to the first searching unit and the second searching unit.

17. The network device according to claim 15, characterized in that the topology obtaining unit includes:

Static subunit, used to configure the ring network topology; or,

The dynamic subunit is used to obtain the ring network topology by interacting with protocol documents with other nodes in the ring network.

18. The network device according to claim 17, characterized in that the dynamic subunit includes:

The first processing subunit is configured to receive the first type of long-path APS protocol message, and send the number of nodes that the first type of long-path APS protocol message passes through to the node number determination subunit; wherein, the first The long-path APS protocol message comes from an adjacent node of the network device, and the destination node is the network device. The first-type long-path APS protocol message carries source node information, destination node information, and the first-type long-path APS protocol message. The number of nodes that APS protocol packets pass through;

The node number determination subunit is used to determine the number of nodes in the ring network based on the number of nodes passed by the first type of long-path APS protocol message sent by the first processing subunit, and to determine the number of nodes in the ring network. Sent to the ring network topology determination subunit;

The second processing subunit is used to send and/or receive the second type of long path APS protocol message, record the source node information and destination node information carried in the second type of APS protocol message, and convert the second type of long path APS protocol message. The source node information and destination node information carried in the long path APS protocol message are sent to the ring network topology determination subunit; wherein, the second type of long path APS protocol message carries source node information, destination node information and all The number of nodes that the second type long path APS protocol packet passes through; the second type long path The destination node of the APS protocol message is other nodes in the ring network except the network device; the ring network topology determination subunit is used to determine the first type according to the received number of nodes in the ring network. The source node information and destination node information carried in the long path APS protocol message and the second type of long path APS protocol message determine the ring network topology.

19. The network device according to any one of claims 13-18, characterized in that the determination module is specifically configured to: determine whether there is an uplink node in the local service information according to the unreachable node information and /Or the downstream node is a service of an unreachable node; if it exists, the service is determined to be a suppressed service.

20. The network device according to any one of claims 13-19, characterized in that the suppression module includes:

The first suppression unit is used to suppress the determined suppressed services based on the service channel; or,

The second suppression unit is used to suppress the determined suppressed services based on the ring channel.

21. The network device according to claim 20, wherein the first suppression unit is specifically configured to: suppress suppressed services based on the obtained unreachable node information and local service information.

22. The network device according to claim 21, characterized in that, if the downstream node of the service is unreachable, the first suppression unit is specifically configured to set an invalid flag in the forwarding layer of the suppressed service incoming interface. , discard the suppressed service; or, set a survival time TTL for the suppressed service, wherein the TTL is less than or equal to a predetermined TTL threshold

If the uplink node of the service is unreachable, the first suppression unit is configured to send alarm indication information AIS or forward defect indication FDI downstream from the outbound interface direction of the suppressed service.

23. The network device according to claim 20, characterized in that the second suppression unit is specifically configured to determine the ring channel corresponding to the suppressed service according to the suppressed service, and transmit through the ring channel business is suppressed.

24. The network device according to claim 23, wherein the second suppression unit suppresses the ring channel by setting an invalid identifier in the ring channel forwarding layer and discarding the traffic forwarded to the ring channel. Channel transmission services are suppressed.