WO2022078051A1 - Route configuration method, network device, communication system and storage medium - Google Patents

Abstract

Embodiments of the present application disclose a route configuration method, a network device, a communication system and a storage medium, which are used for improving the efficiency in configuring a route of a transmission path. The method is applied to a target transmission path. The target transmission path comprises a first network device, at least one intermediate network device and a last network device connected sequentially. Said method comprises: an intermediate network device receiving a first configuration message, the first configuration message being transmitted along a first transmission direction in a target transmission path; the intermediate network device configuring a route between the intermediate network device and adjacent network devices according to the first configuration message; the intermediate network device receiving a second configuration message, the second configuration message being transmitted along a second transmission direction in the target transmission path, the first transmission direction being opposite to the second transmission direction; and if the intermediate network device determines that the first configuration message and the second configuration message satisfy a preset condition, the intermediate network device determining to no longer configure the route according to the second configuration message.

Description

A routing configuration method, network device, communication system and storage medium

This application claims the priority of the Chinese patent application filed on October 13, 2020 with the State Intellectual Property Office of China, the application number is 202011090902.0, and the application name is "a routing configuration method, network equipment, communication system and storage medium", The entire contents of which are incorporated herein by reference.

technical field

The present invention relates to the field of optical fiber communication, in particular to a routing configuration method, network equipment, communication system and storage medium.

Background technique

The automatically switched optical network (ASON) has basically covered the metro and core backbone WDM networks. ASON can automatically establish a transmission path for transmitting services through the resource reservation protocol traffic engineering (RSVP-TE) protocol.

The specific process is as follows: the source network device acquires the transmission path, and determines each network device included in the transmission path. The source network device sends a path message to each network device included in the transmission path along the transmission path. Each network device establishes a route based on the received path message until the path message is transmitted to the sink network device included in the transmission path. The sink network device sends a response message to the source network device through the transmission path. When the source network device receives the response message, the transmission path configuration is complete.

It can be seen that if the number of network devices included in the transmission path is relatively large, the multiple network devices included in the transmission path need to configure routes one by one according to the path message, which reduces the efficiency of configuring the transmission path.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a routing configuration method, a network device, a communication system, and a storage medium, which are used to improve the routing efficiency of configuring transmission paths.

In a first aspect, an embodiment of the present invention provides a method for configuring a route. The method is applied to a target transmission path, where the target transmission path includes a first network device, at least one intermediate network device, and a last network device connected in sequence, and the method includes : The intermediate network device receives the first configuration packet, and the first configuration packet is transmitted along the first transmission direction in the target transmission path; the intermediate network device configures the intermediate network device and adjacent network devices according to the first configuration packet In the target transmission path, the intermediate network device and the adjacent network device are located adjacent to each other and are connected to each other; the intermediate network device receives the second configuration packet, and the second configuration packet is transmitted at the target The path is transmitted along the second transmission direction, and the first transmission direction is opposite to the second transmission direction; if the intermediate network device determines that the first configuration packet and the second configuration packet meet the preset conditions, the intermediate network The device determines to no longer configure a route according to the second configuration message, and the preset condition is that both the first configuration message and the second configuration message are used to configure the route of the target transmission path, and the target transmission path is used for Transfer the target business.

It can be seen that the intermediate network device configures the route through one of the first configuration packet and the second configuration packet, so that the target transmission path can configure the route through the configuration packets that are concurrently and transmitted in both directions, which effectively improves the configuration target. Efficiency of routing of transmission paths. Among them, the two-way concurrent and bidirectional transmission specifically means that one configuration packet comes from the first network device and is transmitted to the last network device through the target transmission path, and the other configuration packet comes from the last network device and is sent to the first network through the target transmission path. device transfer.

Among all the network devices included in the target transmission path, some network devices configure routes according to the first configuration message, while other network devices configure routes according to the second configuration message. In this way, the time for configuring the route of the target transmission path is effectively reduced.

The network equipment shown in this aspect is a transport network equipment. In the target transmission path, whether any network device configures the route according to the first configuration packet or the second configuration packet, it can implement the routing in the first transmission direction and the second transmission direction, and there is no need to configure different transmission directions for services. Routing in different directions.

Based on the first aspect, in an optional implementation manner, if the first configuration packet comes from the first network device and the second configuration packet comes from the last network device, the intermediate network device reports the first configuration packet according to the first configuration. After configuring the route between the intermediate network device and the adjacent network device through the file, the method further includes: the intermediate network device sends the first configuration message to the last network device; the intermediate network device determines that the second After the configuration message configures the route, the method further includes: the intermediate network device ends the transmission of the second configuration message.

It can be seen that, in this implementation manner, the intermediate network device first receives the first configuration packet (that is, the forward configuration packet) from the first network device, and then receives the second configuration packet (that is, the reverse configuration packet) from the last network device. to the configuration message). The intermediate network device only needs to configure the route according to the first configuration message. There is no need to configure routing according to the second configuration message. And any network device connected between the first network device and the intermediate network device has completed routing configuration according to the first configuration message. In order to reduce the amount of data processed by the network device and reduce the possibility of congestion due to the excessive amount of data processed by the network device, the intermediate network device terminates the transmission of the second configuration packet.

Based on the first aspect, in an optional implementation manner, if the first configuration packet comes from the last network device and the second configuration packet comes from the first network device, the intermediate network device reports the first configuration packet according to the first configuration. After configuring the route between the intermediate network device and the adjacent network device through the file, the method further includes: the intermediate network device sends the first configuration message to the first network device; After the configuration message configures the route, the method further includes: the intermediate network device sends the second configuration message to the end network device.

It can be seen that, in this implementation manner, the intermediate network device first receives the first configuration packet (ie, the reverse configuration packet) from the last network device, and then receives the second configuration packet (ie, the forward configuration packet) from the first network device. configuration message). In order to enable the first network device to confirm that each network device in the target transmission path has successfully configured a route, the intermediate network device sends a second configuration message to the last network device. When the last network device receives the second configuration message, the last network device determines that the route of the target transmission path has been configured. The last network device sends a response message to the first network device via the target transmission path. When the first network device receives the response message, it can determine that the route of the target transmission path has been configured.

Based on the first aspect, in an optional implementation manner, the intermediate network device determining that the first configuration packet and the second configuration packet meet a preset condition includes: the intermediate network device determining that the first configuration packet and the second configuration packet meet a preset condition. The second configuration packet satisfies a first preset sub-condition, where the first preset sub-condition is that both the first configuration packet and the second configuration packet include the target identifier of the target service, and the first configuration packet The message includes a first indication message for indicating the first transmission direction, and the second configuration message includes a second indication message for indicating the second transmission direction; and the intermediate network device determines that the first configuration message and The second configuration packet satisfies a second preset sub-condition, where the second preset sub-condition is that both the first configuration packet and the second configuration packet are used to configure the route of the target transmission path.

It can be seen that the intermediate network device first parses the first configuration message and part of the second configuration message (ie, the target identifier, the first indication message and the second indication message). When only the part of the message satisfies the first preset sub-condition, the first configuration packet and the second configuration packet are further parsed to determine whether the second preset sub-condition is met. It can be seen that the parsing amount of messages to be parsed by the intermediate network device is effectively reduced, and the occupation of system resources of the intermediate network device is reduced.

Based on the first aspect, in an optional implementation manner, the method further includes: the intermediate network device receiving a deletion instruction message, where the deletion instruction message is used to instruct the intermediate network device to delete the configuration packet from the end network device. For example, if the above-mentioned first configuration packet comes from the last network device, the intermediate network device deletes the first configuration packet when receiving the deletion instruction message. For another example, if the second configuration packet shown above is from the last network device, the intermediate network device deletes the second configuration packet in the case of receiving the deletion instruction message.

It can be seen that, in this implementation manner, when the intermediate network device receives the deletion instruction message, it can delete the configuration message from the end network device on the control plane according to the deletion instruction message. The amount of data stored by the intermediate network device is effectively reduced, and the possibility of congestion of the intermediate network device is reduced.

In a second aspect, an embodiment of the present invention provides a routing configuration method. The method is applied to a target transmission path, where the target transmission path includes a plurality of network devices, and the target transmission path is used to route to a terminal included in the target transmission path. The network device transmits a forward configuration message, and the method includes: the last network device obtains a reverse configuration message, and the reverse configuration message and the forward configuration message are transmitted in opposite directions in the target transmission path; The last network device sends a reverse configuration packet to the first network device, where the reverse configuration packet is used to instruct the first network device to configure a route between the first network device and the second network device, and the first network device The device and the second network device are any two network devices that are adjacent to each other and are connected to each other included in the target transmission path.

For the description of the beneficial effects shown in this aspect, please refer to the description of the above-mentioned first aspect, and details will not be repeated. It should be clear that the multiple network devices included in the target transmission path shown in this aspect also include the first network device shown in the first aspect and the intermediate network device connected between the first network device and the last network device, The first network device and the second network device shown in this aspect are any two network devices included in the target transmission path. For example, the first network device and the second network device may be a first network device and an intermediate network device that are connected to each other. For another example, the first network device and the second network device may be two intermediate network devices connected to each other. For another example, the first network device and the second network device may be intermediate network devices and end network devices that are connected to each other.

Based on the second aspect, in an optional implementation manner, acquiring the reverse configuration message by the end-network device includes: acquiring, by the end-network device, a reverse path indication message, where the reverse path indication message is used to indicate a reverse transmission direction, the connection relationship between multiple network devices included in the target transmission path, the reverse transmission direction is the transmission direction of the reverse configuration packet in the target transmission path; the last network device according to the reverse path The instruction message obtains the reverse configuration message.

Based on the second aspect, in an optional implementation manner, acquiring the reverse path indication message by the end-network device includes: acquiring, by the end-network device, a forward path indication message, where the forward path indication message is used to indicate forward transmission direction, the connection relationship between the multiple network devices, the forward transmission direction is the transmission direction of the forward configuration message in the target transmission path; the last network device converts the forward path indication message into the reverse direction Indicates a message to the path.

It can be seen that, in this implementation manner, when the terminal network device receives the forward path indication message, it can convert the forward path indication message into a reverse path indication message to generate the reverse configuration message.

Based on the second aspect, in an optional implementation manner, the method further includes: the terminal network device receives a fault indication message, where the fault indication message is used to indicate that the initial transmission path is faulty, and the fault indication message includes the target of the target service identification, where both the initial transmission path and the target transmission path are used to transmit the target service, and some of the network devices included in the multiple network devices included in the initial transmission path and the multiple network devices included in the target transmission path are the same ; The last network equipment converts the forward path indication message into the reverse path indication message and includes: when the last network equipment determines that the forward path indication message and the fault indication message both include the target identifier of the target service , the end network device converts the forward path indication message into the reverse path indication message.

It can be seen that in the case of failure of the initial transmission path, the route of the same target transmission path can be configured through two concurrent and bidirectionally transmitted configuration packets, which effectively improves the efficiency of configuring the route of the target transmission path. Furthermore, the path for transmitting the target service can be quickly switched from the initial transmission path to the target transmission path, effectively ensuring the normal transmission of the target service.

In addition, because the routes of the same target transmission path are configured through two concurrent configuration packets that are transmitted in both directions, in a scenario where the number of network devices included in the target transmission path increases, it is possible to effectively reduce the impact on the target transmission path. The length of time for the route to be configured. It is avoided that the performance degradation of reconfiguring the transmission path of the target service occurs due to the increase in the number of network devices included in the target transmission path.

Based on the second aspect, in an optional implementation manner, the method further includes: the last network device receives the forward configuration message; the last network device sends a response message to the first network device via the target transmission path, The response message is used to indicate that the route between any two adjacent and mutually connected network devices included in the target transmission path has been successfully configured.

Based on the second aspect, in an optional implementation manner, after the last network device sends the reverse configuration message to the first network device, the method further includes: the last network device deletes the reverse configuration message; the last network device deletes the reverse configuration message; The network device sends a deletion instruction message to the first network device, where the deletion instruction message is used to instruct the first network device to delete the reverse configuration message.

In a third aspect, an embodiment of the present invention provides a network device, where the network device is an intermediate network device connected between a first network device and a last network device in a target transmission path, and the intermediate network device includes a processor, a memory, and a An optical transceiver, wherein the processor, the memory, and the optical transceiver are interconnected through a line; the optical transceiver is used to receive a first configuration message, and the first configuration message is along the first transmission direction in the target transmission path transmission; the processor invokes the program code in the memory to configure the route between the intermediate network device and the adjacent network device according to the first configuration message, in the target transmission path, the intermediate network device and the adjacent network device The adjacent network devices are located adjacent to each other and connected to each other; the optical transceiver is further configured to receive a second configuration packet, the second configuration packet is transmitted along the second transmission direction in the target transmission path, and the first transmission The direction is opposite to the second transmission direction; the processor is further configured to, if the processor determines that the first configuration message and the second configuration message meet a preset condition, the processor determines that the second The configuration message configures a route, and the preset condition is that both the first configuration message and the second configuration message are used to configure the route of the target transmission path, and the target transmission path is used to transmit the target service.

For the description of the beneficial effects shown in this aspect, please refer to the first aspect for details, and details will not be repeated.

Based on the third aspect, in an optional implementation manner, if the first configuration message comes from the first network device, the second configuration message comes from the last network device; the optical transceiver is further configured to send a message to the last network device. The network device sends the first configuration message; the processor is further configured to end the transmission of the second configuration message.

Based on the third aspect, in an optional implementation manner, if the first configuration packet comes from the last network device, and the second configuration packet comes from the first network device, the optical transceiver is further configured to: send the first configuration packet to the first network device. The network device sends the first configuration message; and sends the second configuration message to the last network device.

Based on the third aspect, in an optional implementation manner, the processor is specifically configured to: determine that the first configuration packet and the second configuration packet satisfy a first preset sub-condition, the first preset sub-condition Both the first configuration message and the second configuration message include the target identifier of the target service, and the first configuration message includes a first indication message for indicating the first transmission direction, and the second configuration message The message includes a second indication message for indicating the second transmission direction; it is determined that the first configuration message and the second configuration message satisfy a second preset sub-condition, and the second preset sub-condition is the first configuration Both the message and the second configuration message are used to configure the route of the target transmission path.

Based on the third aspect, in an optional implementation manner, the optical transceiver is further configured to: receive a deletion instruction message, and if the first configuration packet comes from the end-network device, the deletion instruction message is used to instruct deletion of the The first configuration message, or, if the second configuration message comes from the last network device, the deletion instruction message is used to instruct to delete the second configuration message.

In a fourth aspect, an embodiment of the present invention provides a network device. The network device includes a plurality of network devices as a target transmission path, and the target transmission path is used to transmit a forward configuration message to the last network device. The network device includes a processor, a memory, and an optical transceiver, wherein the processor, the memory, and the optical transceiver are interconnected through a line; the processor invokes the program code in the memory to obtain a reverse configuration message, The reverse configuration packet and the forward configuration packet are transmitted in opposite directions in the target transmission path; the optical transceiver is further configured to send a reverse configuration packet to the first network device, the reverse configuration The message is used to instruct the first network device to configure a route between the first network device and the second network device, and the first network device and the second network device are any two positions included in the target transmission path. Neighboring and interconnected network devices.

For the description of the beneficial effects shown in this aspect, please refer to the second aspect for details, and details will not be repeated.

Based on the fourth aspect, in an optional implementation manner, the processor is specifically configured to: obtain a reverse path indication message, where the reverse path indication message is used to indicate, along the reverse transmission direction, between the multiple network devices The reverse transmission direction is the transmission direction of the reverse configuration message in the target transmission path; the reverse configuration message is obtained according to the reverse path indication message.

Based on the fourth aspect, in an optional implementation manner, the processor is specifically configured to: obtain a forward path indication message, where the forward path indication message is used to indicate that, along the forward transmission direction, between the multiple network devices The forward transmission direction is the transmission direction of the forward configuration message in the target transmission path; the forward path indication message is converted into the reverse path indication message.

Based on the fourth aspect, in an optional implementation manner, the optical transceiver is further configured to receive a fault indication message, where the fault indication message is used to indicate that the initial transmission path is faulty, and the fault indication message includes a target identifier of the target service , wherein the initial transmission path and the target transmission path are both used to transmit the target service, and some of the network devices included in the multiple network devices included in the initial transmission path and the multiple network devices included in the target transmission path are the same; The processor is specifically configured to convert the forward path indication message into the reverse path indication message when it is determined that both the forward path indication message and the fault indication message include the target identifier of the target service.

Based on the fourth aspect, in an optional implementation manner, the optical transceiver is further configured to: receive the forward configuration message; send a response message to the first network device via the target transmission path, where the response message is used for Indicates that the route between any two adjacent and connected network devices included in the target transmission path has been configured successfully.

Based on the fourth aspect, in an optional implementation manner, the processor is further configured to delete the reverse configuration message; the optical transceiver is further configured to send a deletion instruction message to the first network device, the deletion The instruction message is used to instruct the first network device to delete the reverse configuration message.

In a fifth aspect, an embodiment of the present invention provides a communication system, including a target transmission path, where the target transmission path includes a first network device, at least one intermediate network device, and a last network device connected in sequence, and the intermediate network device is the same as the third aspect. As shown in any one of the items, the end network device is as shown in any of the fourth aspects.

In a sixth aspect, an embodiment of the present invention provides a digital processing chip, the digital processing chip includes a processor and a memory, the memory and the processor are interconnected through a line, and instructions are stored in the memory, and the processor is used to execute the above-mentioned Either of the first aspect or the second aspect.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, including instructions, when the instructions are executed on a computer, the computer is made to execute as shown in any one of the first aspect or the second aspect.

In an eighth aspect, an embodiment of the present invention provides a computer program product containing instructions, which, when executed on a computer, cause the computer to execute any one of the first aspect or the second aspect.

By adopting the routing configuration method, network device, communication system and storage medium provided by the present application, it is possible to configure the routing of the same target transmission path through two concurrent and bidirectionally transmitted configuration messages, which effectively improves the reliability of the target transmission path. The efficiency of routing configuration. And among all the network devices included in the target transmission path, some network devices configure routes according to the first configuration message, while other network devices configure routes according to the second configuration message. In this way, the time for configuring the route of the target transmission path is effectively reduced.

In addition, in the target transmission path, whether any network device configures the route according to the first configuration message or the second configuration message, it can implement the routing in the first transmission direction and the second transmission direction, and there is no need for different transmission directions of services. Configure routes in different directions.

Description of drawings

FIG. 1 is a structural example diagram of a first embodiment of a communication system provided by this application;

FIG. 2 is a flow chart of steps of a first embodiment of a route configuration method provided by the present application;

FIG. 3 is an exemplary structural diagram of an embodiment of a target transmission path provided by the application;

Fig. 4 is a flow chart of the steps of the second embodiment of the route configuration method provided by the present application;

5 is a flowchart of steps of a third embodiment of a route configuration method provided by the present application;

FIG. 6 is a schematic structural diagram of a second embodiment of the communication system provided by the present application;

FIG. 7 is a schematic structural diagram of an embodiment of a network device provided by the present application.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

The present application provides a routing configuration method. In order to better understand the method provided by the present application, the following first describes the communication system to which the method provided by the present application is applied with reference to FIG. 1 . A structural example diagram of the first embodiment of the communication system provided by the application.

As shown in FIG. 1 , the communication system 100 is an ASON as an example for illustration. It should be clearly stated that the specific network type of the communication system 100 is not limited in this application. For example, the communication network 100 may also be a general multi-protocol label Switching technology (generalized multi-protocol label switching, GMPLS) network.

The communication system 100 includes multiple transmission paths for transmitting services. For example, the first transmission path shown in FIG. 1 includes a network device A, a network device B, a network device C, and a network device D that are connected in sequence. It can be known that the service output from the network device A is transmitted to the network device D via the network device B and the network device C in sequence.

What is shown in FIG. 1 also includes a second transmission path, where the second transmission path includes a network device A, a network device E, a network device F, a network device G, and a network device D that are connected in sequence.

It should be clear that, the description of the transmission path included in the communication system 100 in this embodiment is an optional example, which is not limited.

Each network device represents an independent hardware entity in the communication network. In this example, each network device is a transport network device as an example for description. Wherein, the transmission network equipment may be an optical cross connect (OXC) equipment, an optical add drop multiplexer (OADM), a fixed optical add drop multiplexer (fixed optical add drop multiplexer, FOADM) or reconfigurable optical add drop multiplexer (ROADM). This embodiment is exemplified by taking that the network device is a ROADM as an example.

In order to realize that data can be transmitted along the first transmission path, each network device in the first transmission path needs to configure routes. The following describes the specific process of configuring routes for each network device in the first transmission path:

Taking the network device E included in the first transmission path shown in FIG. 1 as an example, in order to realize the purpose that data can be transmitted on the first transmission path, the network device E needs to create a route to realize that the network device E transmits data from the network device E. The data of A is sent to the network device F, and the purpose of sending the data from the network device F to the network device A can also be achieved by the network device E. The data may be services, various messages conforming to the RSVP-TE protocol, and the like.

Specifically, the network device E includes a port 1 and a port 2, and the ports are physical ports used to transmit data. The port 1 is one of the multiple ports included in the network device E, and the port 1 and the network device A are connected by an optical fiber. The port 2 is one of the multiple ports included in the network device E, and the port 1 and the port 2 are different. Port 2 and network device F are connected by optical fiber.

Creating a route by network device E refers to creating a corresponding relationship between port 1 and port 2. The network device E can implement the data interaction between the port 1 and the port 2 based on the corresponding relationship.

It can be seen that when the network device E obtains data from the network device A through the port 1, the network device E transmits the data to the port 2 based on the created route, so as to transmit the data to the network device F via the port 2. Similarly, when the network device E obtains data from the network device F through the port 2, the network device E transmits the data to the port 1 based on the created route, so as to transmit the data to the network device A via the port 1.

For the description of the process of creating routes by other network devices included in the first transmission path, please refer to the network device E for details, and details will not be repeated.

It can be seen that each network device located on the first transmission path has completed the routing configuration, and the service can be transmitted on the first transmission path.

If the route of the first transmission path is configured through the RSVP-TE protocol in the existing solution, network device A needs to send Path messages to network device B, network device C, and network device D sequentially through the first transmission path. The Path message is a type of RSVP-TE protocol message.

Each network device that receives the Path message is used to configure routing according to the Path message. After the network device D completes the routing configuration according to the Path message, it transmits a response message to the network device A.

It can be seen that, if the number of network devices included in the first transmission path is large, each network device included in the first transmission path configures routes in sequence according to the Path message. This increases the difficulty of configuring the first transmission path and reduces the efficiency of configuring the first transmission path. Furthermore, the performance of configuring the first transmission path deteriorates as the number of network devices included in the first transmission path increases.

The routing configuration method provided by the present application can effectively reduce the difficulty of configuring the transmission path and improve the efficiency of configuring the transmission path. It is avoided that the performance of the configuration transmission path is degraded due to an increase in the number of network devices included in the transmission path.

The specific execution process of the route configuration method provided by the present application will be described below with reference to FIG. 2 , wherein FIG. 2 is a flowchart of steps of the first embodiment of the route configuration method provided by the present application.

Step 201: The first network device configures a route according to the forward configuration message.

The first network device shown in this embodiment is the first network device in the target transmission path.

For better understanding, the target transmission path will be described below with reference to FIG. 3 . As shown in FIG. 3 , in this embodiment, the target transmission path includes network device A, network device E, network device F, network device G, and network device D in sequence as an example. The first network device shown in this embodiment is network device A, and the last network device is network device D. The network device E, the network device F, and the network device G are intermediate network devices connected between the first network device A and the last network device D.

The forward configuration message shown in this embodiment is used to instruct each network device on the target transmission path to configure a route. After the network device that has received the forward configuration message completes the route configuration based on the forward configuration message, the target service can be transmitted via the network device.

For example, the first network device A needs to configure the route between the first network device A and the intermediate network device E according to the forward configuration message, so that the target service can be transmitted between the first network device A and the intermediate network device E.

Several optional sources of forward configuration packets are described below:

source 1

Continuing to refer to FIG. 1 , the communication system 100 shown in this application further includes a network management device 101 . The network management device 101 is connected to each network device. The network management device 101 can obtain forward configuration messages according to protocols such as open shortest path first (OSPF), or path computation element communication protocol (PCEP). The forward configuration message includes at least the target identifier of the target service to be transmitted, and each network device included in the target transmission path for transmitting the target service.

This embodiment does not limit the specific device through which the network management device obtains the forward configuration message. For example, the network management device may obtain the forward configuration message through its path computation element (path computation element, PCE) control device.

This embodiment does not limit the form of the PCE control device, for example, the functions of the PCE control device may be partially or fully realized by software, and for example, the PCE control device may be a chip or an integrated circuit.

When the network management device acquires the forward configuration message, the network management device sends the forward configuration message to the first network device in the target transmission path. For example, the network management device 101 sends the forward configuration packet to the network device A.

source 2

The first network device has configured the PCE control device. The first network device generates the forward configuration message through the PCE control device. For the description of the PCE control device acquiring the forward configuration message, please refer to Source 1 for details, and will not be repeated.

Source 3

Any network device in the communication system acquires the forward configuration message based on its configured PCE control device, and sends the acquired forward configuration message to the first network device. For the description of the PCE control device acquiring the forward configuration message, please refer to Source 1 for details, and will not be repeated.

This embodiment is exemplified by taking the setting of the PCE control apparatus by the network management device as an example. If it is required that each network device in the target transmission path can execute the method shown in this embodiment to realize the configuration of the target transmission path, each network device is configured with an RSVP control apparatus. The RSVP control device is used to realize the function of configuring the target transmission path based on the RSVP-TE protocol.

Each network device implements the method shown in this embodiment based on the RSVP control apparatus. This embodiment does not limit the form of the RSVP control apparatus. For example, the functions of the RSVP control device may be partially or completely implemented by software, and for example, the RSVP control device may be a chip or an integrated circuit.

Optionally, if the forward configuration message is generated by the first network device, the PCE control device and the RSVP control device included in the first network device may be the same device.

The content of the forward configuration packet conforming to the RSVP-TE protocol is exemplarily described below. It should be clear that the description of the specific content of the forward configuration message in this embodiment may be an optional example, and is not limited, as long as each network device on the target transmission path can configure the target according to the forward configuration message. The routing of the transmission path is sufficient.

The forward configuration message includes at least: a target identifier of the target service, a forward path indication message and a first indication message.

Wherein, the forward path indication message includes the identifiers of each network device in the target transmission path, and the port identifiers for configuring routes included in each network device corresponding to the identifier.

The forward path indication message is described below with reference to Table 1:

Table 1

Identification of the network device	ID of the first port	Identification of the second port
The first network device A	port A1	port A2
Intermediate network equipment E	port E1	port E2
Intermediate network equipment F	port F1	port F2
Intermediate network equipment G	port G1	port G2
end network device D	port D1	port D2

As shown in Table 1, the forward path indication message is used to indicate the target transmission path. Along the forward transmission direction, it sequentially includes network devices A, E, F, G, and D, and the connection relationship between network devices. The forward transmission direction refers to the direction in which the transmission starting point is the first network device A, and the transmission is performed sequentially along each network device included in the target transmission path.

When each network device receives the forward configuration message, it can determine the first port identifier and the second port corresponding to the identifier of the network device according to the forward path indication message included in the forward configuration message to configure the route between the first port and the second port inside the network device.

For example, when the first network device A obtains the forward path indication message, it determines that the identifier of the corresponding first port is A1, and the identifier of the second port is A2. The route configured by the first network device is the route between port A1 and port A2. It can be seen that if the first network device A acts as the initiator of the target service with the target identifier, when the first network device A receives the target service with the target identifier via the port A1, the first network device A will send the target service from the port A1. to port A2.

If the last network device D is the initiator of the target service, when the first network device A receives the target service with the target identifier via the port A2, the first network device A transmits the target service from the port A2 to the port A1.

In this embodiment, the port A2 of the first network device A and the port E1 of the intermediate network device E are connected by optical fibers. It can be known that in the case where the route between the port A1 and the port A2 has been configured on the first network device, the route between the port A2 of the first network device and the port E1 of the intermediate network device E is also successfully configured.

For example, in the case where the first network device transmits the target service from port A1 to port A2, since port A2 and port E1 are connected by optical fiber, the target service via port A2 is transmitted to port E1 via the optical fiber, so as to realize Configuration of the route between the first network device A and the intermediate network device E.

The first indication message included in the forward configuration packet is used to indicate that the forward configuration packet is transmitted along the forward transmission direction in the target transmission path.

Specifically, the forward configuration message shown in this embodiment is a type of RSVP-TE protocol message. In this embodiment, signaling flags and The service triplet message is used to generate the forward configuration message shown in this embodiment. For the specific description of the signaling flag, please refer to the relevant description shown in Table 2 below. For the specific description of the service triplet message, please refer to For details, please refer to the relevant descriptions shown in Table 3 below.

The format of the signaling flag is described below:

The specific format is shown in Table 2 below:

Table 2

The newly added signaling tag includes a field "Type", which is used to indicate that the newly added message is a signaling tag. For example, the length of the value of this field may be a 16-bit (bit) bit value.

The field "Length" is used to indicate the length of the newly added signaling marker, and the length of the value of this field may be a value of 16 bits.

Field "Protocol Type", this field is used to indicate whether the signaling flag is transmitted in the forward transmission direction or in the reverse transmission direction. It can be seen that if the value of this field shown in this example is "0", then this field is the first indication message shown in this embodiment. It is used to indicate that the configuration packet including the signaling flag is a forward configuration packet.

The format of the service triplet message is described below:

The specific format is shown in Table 3 below:

table 3

The newly added service triplet message includes a field "Type", which is used to indicate that the newly added message is a "service triplet message". For example, the length of the value of this field may be a 16-bit value.

The field "Length" is used to indicate the length of the service triplet message, and the length of the value of this field may be a value of 16 bits.

The field "Source_Router_Id" is used to indicate the identifier of the first network device included in the configuration message including the service triplet message. For example, the length of the value of this field may be a 32-bit value.

The field "Dst_Router_Id" is used to indicate the identifier of the last network device included in the configuration message including the service triplet message. For example, the length of the value of this field may be a 32-bit value.

The field "Index" is used to indicate the identifier of the target service to be transmitted by the target transmission path. For example, the length of the value of this field may be a 32-bit value.

Specifically, each intermediate network device included in the target transmission path has been set in the existing RSVP-TE protocol message. For a specific description, please refer to the description of the forward path indication message shown above. The description of the specific format of the forward configuration message in this embodiment is an optional example, which is not limited, as long as the forward configuration message It is sufficient to include at least the target identifier of the target service, the forward path indication message and the first indication message.

Step 202: The first network device sends a forward configuration message to the first intermediate network device.

The first intermediate network device shown in this embodiment is an intermediate network device that is adjacent to the first network device and connected by an optical fiber among the multiple intermediate network devices included in the target transmission path. Taking the example shown in FIG. 3 , the first intermediate network device is a network device E connected to the first network device A through an optical fiber.

Step 203: The final network device configures a route according to the reverse configuration message.

The last network device shown in this embodiment is the last network device in the target transmission path (ie, the network device D shown in FIG. 3 ).

The reverse configuration packet shown in this embodiment is used to instruct each network device in the target transmission path to configure a route, and the network device that has received the reverse configuration packet completes routing based on the reverse configuration packet. After the configuration, the target service is transmitted via the network device.

The following describes several optional ways for the terminal network device to obtain reverse configuration packets:

way 1

At the end, the network device D receives the forward configuration message. For the specific description of the forward configuration message, please refer to step 201 for details, and details are not repeated.

Specifically, the last network device D may receive a forward configuration message from the network management device, or the last network device may receive a forward configuration message from the first network device A, or the last network device may receive a forward configuration message from any communication network device. The forward configuration message sent by a network device.

When the last network device D receives the forward configuration message, the last network device D generates a reverse configuration message. The reverse configuration message includes a target identifier of the target service, a reverse path indication message and a second indication message.

Specifically, the last network device D inverts the forward path indication message included in the received forward configuration message to obtain the reverse path indication message, and the reverse path indication message is performed as shown in Table 4 below. illustrate:

Table 4

Identification of the network device	ID of the first port	Identification of the second port
end network device D	port D1	port D2
Intermediate network equipment G	port G1	port G2
Intermediate network equipment F	port F1	port F2
Intermediate network equipment E	port E1	port E2
The first network device A	port A1	port A2

Compared with Table 1 and Table 4, it can be seen that the reverse path indication information is generated by inverting the forward path indication message, so that the first network device (ie the first network device) in the forward path indication message is generated. A) Reverse to the last network device in the reverse path indication message. Also, the last network device (ie, the last network device D) in the forward path indication message is reversed to the first network device in the reverse path indication message, and so on.

As shown in Table 4, the reverse path indication message is used to indicate the target transmission path, and along the reverse transmission direction, it sequentially includes the connection relationships of network devices D, G, F, E and A, wherein the reverse transmission direction Opposite of the forward transmission direction.

In the case where each network device receives the reverse configuration message, according to the reverse path indication message included in the reverse configuration message, determine the identifier of the first port and the identifier of the second port corresponding to the identifier of the network device. ID, so as to establish a route between the first port and the second port inside the network device. For the specific process of establishing a route, you can also refer to the process of establishing a route for a forward configuration message shown in step 201, and details are not repeated. .

The second indication message included in the reverse configuration packet is used to indicate that the reverse configuration packet is transmitted along the reverse transmission direction in the target transmission path. Wherein, as shown in FIG. 3 , the reverse transmission direction means that the reverse configuration message takes the last network device D as the transmission starting point, and is sequentially transmitted through each network device included in the target transmission path.

For the description of the specific format of the reverse configuration packet, please refer to the above description of the format of the forward configuration packet, and details are not repeated here.

way 2

The last network device D receives the forward path indication message and the target identifier of the target service.

Specifically, the network management device or the first network device shown in this embodiment may directly send the forward path indication message and the target identifier to the last network device. The final network device generates the reverse configuration message according to the forward path indication message and the target identifier.

way 3

The network management device or the first network device can directly generate the reverse configuration message, and send the generated reverse configuration message to the last network device.

way 4

The final network device obtains the reverse path indication message for transmitting the target service according to protocols such as OSPF or PCEP, and sends the reverse path indication message to the network management device. In the case that the network management device has obtained the forward path indication message for transmitting the target service, the network management device determines whether the reverse path indication message and the forward path indication message include the same network devices (for example, both include network devices A, E, F, G and D), the network management device sends a success indication message to the last network device. The last network device configures the reverse configuration message of the reverse path indication message according to the success indication message.

Optionally, the last network device can also send the reverse path indication message to the first network device or any network device included in the communication system, and the network device determines the reverse path indication message and the forward path indication message. Whether the included network devices are the same.

This embodiment does not limit the execution sequence between step 202 and step 203 .

Step 204: The last network device sends a reverse configuration message to the second intermediate network device.

The second intermediate network device shown in this embodiment is an intermediate network device that is adjacent to the last network device D and connected by an optical fiber among the multiple intermediate network devices included in the target transmission path. Taking the example shown in FIG. 3 , the second intermediate network device is a network device G that is connected to the last network device D through an optical fiber.

This embodiment does not limit the execution sequence between step 202 and step 204 .

Step 205: The first intermediate network device receives the forward configuration message from the first network device.

Step 206: The first intermediate network device configures a route according to the forward configuration message.

Continuing to take the example shown in FIG. 3 , in this embodiment, the first intermediate network device E only receives the forward configuration message from the network device A and has not received the reverse configuration message from the last network device D as an example. Exemplary illustration.

When the first intermediate network device E receives the forward configuration packet, the first intermediate network device first needs to determine whether to configure a route according to the received forward configuration packet, and the specific determination process is as follows:

The first intermediate network device parses out the target identifier of the target service included in the forward configuration packet, and further determines whether the first intermediate network device has configured the route of the target service with the target identifier. For example, whether the first intermediate network device has been configured with a routing table, where the routing table includes a target identifier and a port identifier for transmitting the target service with the target identifier.

If yes, it means that the first intermediate network device has configured the route of the target service with the target identifier. If not, it means that the first intermediate network device is not configured with the route of the target service with the target identifier.

In this embodiment, the first intermediate network device is not configured with the route of the target service with the target identifier as an example for illustrative description. In the case that the route of the target service with the target identifier is not configured on the first intermediate network device, the first intermediate network device determines the first intermediate network device according to the forward path indication message included in the forward configuration packet The identifier of the first port corresponding to E is E1, and the identifier of the second port is E2.

The first intermediate network device E configures the route between the ports E1 and E2, so as to realize the route between the first intermediate network device E and adjacent network devices (ie, the first network device A and the network device F). Specifically, the first intermediate network device may generate a routing table, where the routing table includes the target identifier, the corresponding relationship between the port E1 and the port E2.

It can be seen that, if the first network device A acts as the initiator of the target service with the target identifier, when the first intermediate network device E receives the target service with the target identifier via the port E1, the first intermediate network device E searches the The routing table transmits the target service from port E1 to port E2. Therefore, the target service can be transmitted to the intermediate network device F via the optical fiber connected between the port E2 and the port F1 of the intermediate network device F.

If the network device D is not used as the originator of the target service, in the case that the first intermediate network device E receives the target service with the target identifier via the port E2, the first intermediate network device E searches the routing table to send the target service from the target service. The target service of port E2 is transmitted to port E1. Therefore, the target service can be transmitted to the first network device A via the optical fiber connected between the port E1 and the port A2 of the first network device A.

This embodiment is exemplified by taking the number of the first intermediate network device as one as an example, and in other examples, the number of the first intermediate network node may be multiple. For the description of the specific process of configuring the route by each of the first network devices, please refer to the description of the process of configuring the route by the first network device E shown in this embodiment, and details are not repeated.

Step 207: The first intermediate network device sends a forward configuration message to the third intermediate network device.

The third intermediate network device shown in this embodiment is an intermediate network device that is adjacent to the first intermediate network device and connected by an optical fiber among the plurality of intermediate network devices included in the target transmission path. Taking the example shown in FIG. 3 , the third intermediate network device is a network device F connected to the first intermediate network device E through an optical fiber.

Step 208: The second intermediate network device receives the reverse configuration message from the last network device.

This embodiment does not limit the execution sequence between step 205 and step 208 .

Step 209: The second intermediate network device configures a route according to the reverse configuration message.

Continuing to take FIG. 3 as an example, in this embodiment, the second intermediate network device G only receives the reverse configuration message from the last network device D, but has not received the forward configuration message from the first network device A as an example Exemplary description.

When the second intermediate network device G receives the reverse configuration message, the second intermediate network device G first determines whether to configure the route according to the received reverse configuration message, and the specific determination process is as follows:

The second intermediate network device G parses out the target identifier of the target service included in the reverse configuration packet, and further determines whether the second intermediate network device has configured the route of the target service with the target identifier. For example, whether the second intermediate network device has been configured with a routing table, where the routing table includes a target identifier and a port identifier for transmitting the target service with the target identifier.

If yes, it means that the second intermediate network device has configured the route of the target service with the target identifier. If not, it means that the second intermediate network device is not configured with the route of the target service with the target identifier.

This embodiment is exemplified by taking as an example that the second intermediate network device is not configured with the route of the target service with the target identifier. In the case where the route of the target service with the target identifier is not configured on the second intermediate network device, the second intermediate network device determines the second intermediate network device according to the reverse path indication message included in the reverse configuration packet The identifier of the first port corresponding to G is G1, and the identifier of the second port is G2.

The second intermediate network device G configures the route between the port G1 and the port G2, so as to realize the route between the second intermediate network device G and adjacent network devices (ie, the last network device D and the network device F). Specifically, the second intermediate network device may generate a routing table, where the routing table includes the target identifier, the corresponding relationship between the port G1 and the port G2.

It can be seen that if the first network device A acts as the initiator of the target service with the target identifier, when the second intermediate network device G receives the target service with the target identifier from the intermediate network device F via the port G1, the second intermediate network device G The network device G transmits the target service from the port G1 to the port G2 by querying the routing table. Therefore, the target service from the intermediate network device F can be transmitted to the last network device D via the optical fiber connected between the port G2 and the last network device D.

If the network device D is not used as the originator of the target service, in the case that the second intermediate network device G receives the target service with the target identifier via the port G2, the second intermediate network device G will query the routing table to send the target service from the target service. The target traffic of port G2 is transmitted to port G1. Therefore, the target service from the last network device D can be transmitted to the third intermediate network device F via the optical fiber connected between the port G1 and the port F2 of the third intermediate network device F.

In this embodiment, the number of the second intermediate network device is only one example for illustrative description, and in other examples, the number of the second intermediate network node may be multiple. For the description of the specific process of configuring the route by each second intermediate network device, please refer to the description of the process of configuring the route by the second intermediate network device G shown in this embodiment, and details are not repeated.

Step 210: The second intermediate network device sends a reverse configuration packet to the third intermediate network device.

This embodiment does not limit the execution sequence between step 207 and step 210 .

Step 211: The third intermediate network device receives the forward configuration message and the reverse configuration message.

Step 212: The third intermediate network device configures a route according to the forward configuration message or the reverse configuration message.

It can be seen from the above steps 207 and 210 that are not limited by the execution timing, the first intermediate network device will send a forward configuration packet to the third intermediate network device, and the second intermediate network device will send a reverse configuration message to the third intermediate network device. The following describes two optional situations for how the third intermediate network device configures the route:

Case 1

In this case, as shown in FIG. 3 , the third intermediate network device F first receives the forward configuration message including the target identifier, and then receives the reverse configuration message including the target identifier.

In this case, the third intermediate network device F configures the route according to the forward configuration message. For the description of the specific configuration process, please refer to the configuration process of the first intermediate network device according to the forward configuration message shown in step 206. , and do not go into details.

In the case that the third intermediate network device F receives the reverse configuration packet after the third intermediate network device F has completed the routing configuration according to the forward configuration packet, the third intermediate network device F parses the received Reverse configuration message. The third intermediate network device judges whether the forward configuration message and the reverse configuration message satisfy a preset condition.

The preset condition is that both the forward configuration message and the reverse configuration message are used to configure the route of the target transmission path. If yes, it means that the route to be configured in the reverse configuration packet has been configured according to the forward configuration packet. If not, it means that the route to be configured in the reverse configuration message has not been configured yet. The specific judgment process is as follows:

First, the third intermediate network device parses the target identifier and the reverse path indication message included in the reverse configuration packet.

Next, the third intermediate network device determines whether the forward configuration message and the reverse configuration message satisfy the first preset sub-condition. The first preset sub-condition is that both the forward configuration message and the reverse configuration message include the target identifier, and the forward configuration message includes the same as that indicated by the reverse path indication message. The forward path indication message is transmitted in the opposite direction.

For example, as shown in Table 2, the value of the field "Protocol Type" included in the forward configuration packet is "0", while the value of the field "Protocol Type" of the reverse configuration packet is "1".

Again, when the third intermediate network device determines that the forward configuration packet and the reverse configuration packet satisfy the first preset sub-condition, the third intermediate network device further determines that the forward configuration packet whether the message and the reverse configuration message satisfy the second preset sub-condition. The second preset sub-condition is that both the forward configuration message and the reverse configuration message are used to configure the route of the target transmission path. Specifically, the second preset sub-condition refers to whether the forward path indication message included in the forward configuration message and the reverse path indication message included in the reverse configuration message are the same.

Specifically, referring to the descriptions in Table 1 and Table 4 above, it can be seen that the forward path indication message and the reverse path indication message both include the identifier of each network device in the target transmission path, and the identifiers included in each network device corresponding to the identifier. Port ID for configuring routing. It can be seen that the same forward path indication message and reverse path indication message shown in this embodiment means that the identifiers of each network device included in the forward path indication message and the reverse path indication message are the same, and the identifiers corresponding to the identifiers are the same. The port identifiers included in each network device for configuring routes are also the same.

For example, if the target transmission path is the transmission path shown in FIG. 3 , the forward path indication message and the reverse path indication message both include the identifiers of network devices A, E, F, G, and D, and the The port identifier used to configure the route indicates that the forward configuration message and the reverse configuration message satisfy the second preset sub-condition.

Again, when the third intermediate network device determines that the forward configuration packet and the reverse configuration packet satisfy the first preset sub-condition and the second preset sub-condition, the third intermediate network device determines that the forward configuration packet and the reverse configuration packet satisfy the first preset sub-condition and the second preset sub-condition. The forward configuration packets and reverse configuration packets meet the preset conditions. The third intermediate network device determines that the route to be configured in the reverse configuration message has been configured by the third intermediate network device according to the forward configuration message.

In the example shown above, the third intermediate network device first parses the target identifier and the reverse path indication message of the reverse configuration message, and then further parses the target identifier and the reverse path indication message when the target identifier and the reverse path indication message satisfy the first preset sub-condition. Parse the reverse configuration packet to obtain the reverse path indication message. If the target identifier and the reverse path indication message do not meet the first preset sub-conditions, it is not necessary to further parse the reverse configuration message. It can be seen that the amount of message parsing is effectively reduced, and the occupation of system resources is reduced.

Optionally, the reverse configuration packet can also be parsed at one time, so as to determine whether the reverse configuration packet and the forward configuration packet meet the preset conditions.

In this embodiment, when the third intermediate network device determines that the route to be configured in the reverse configuration message has been configured by the third intermediate network device according to the forward configuration message, the third intermediate network device may end the The transmission of the reverse configuration message.

Specifically, as shown in FIG. 3 , the configured routing table of the third intermediate network device shows that the reverse configuration packet received at port F2 of the third network device F can be transmitted to port F1, and then passed through the third intermediate network device F. The optical fiber connected between the network device F and the second intermediate network device E is transmitted to the second intermediate network device E.

However, due to the route indicated by the reverse configuration packet, both the first network device A and the first intermediate network device E are configured according to the forward configuration packet, so there is no need to send the reverse configuration packet to the second intermediate network device. E and the first network device A send. In order to reduce the amount of information processed by each network device and reduce the possibility of network device congestion, the third intermediate network device ends the transmission of the reverse configuration packet, and the third network device F does not need to transmit the reverse configuration packet to port F1 again. , which effectively avoids the processing of the reverse configuration packet by the first network device A and the first intermediate network device E.

Optionally, in other examples, the third intermediate network device may also transmit the reverse configuration message to the first network device via the target transmission path. After the first network device receives the reverse configuration message, the first network device ends the transmission of the reverse configuration message.

Case 2

In this case, the third intermediate network device F first receives the reverse configuration message including the target identifier, and then receives the forward configuration message including the target identifier.

In this case, the third intermediate network device F configures the route according to the reverse configuration message. For the description of the specific configuration process, please refer to the configuration process of the second intermediate network device according to the reverse configuration message shown in step 209. , and do not go into details.

After the third intermediate network device F has completed the routing configuration according to the reverse configuration packet, and the third intermediate network device receives the forward configuration packet again, the third intermediate network device determines the forward configuration packet. For the description of the specific judgment process, please refer to the description of the preset condition shown in the above case 1, and details are not repeated.

Step 213: The third intermediate network device sends a forward configuration message to the second network device.

In this embodiment, regardless of the order in which the third intermediate network device receives the forward configuration packet and the reverse configuration packet, the third intermediate network device sends a forward configuration packet to the second intermediate network device according to the configured route. arts.

Step 214: The second intermediate network device sends a forward configuration message to the last network device.

For the second intermediate network device, the reverse configuration packet is received first, and then the forward configuration packet is received. For the description of the specific processing process, please refer to Case 2 of step 212. Specifically, in this embodiment, it is not Do repeat.

Specifically, the second intermediate network device may send the forward configuration message to the end network device according to the route configured in the reverse configuration message.

Step 215: The last network device sends a response message to the first network device.

When the last network device receives the forward configuration message, the last network device determines that in the target transmission path, the route between two network devices that are adjacent at any position and connected by optical fibers has been configured. Then the last network device sends a response message to the first network device through the target transmission path. The response message is used to indicate to the first network device that in the target transmission path, the route between two network devices that are adjacent in any position and connected by an optical fiber has been configured.

As shown in FIG. 3 , the last network device D sends the response message to the first network device A through network devices G, F and E in sequence.

Step 216: The last network device transmits a deletion instruction message to the target transmission path.

In this embodiment, after the final network device determines that each route in the target transmission path has been configured, the final network device may retain the routing table configured on the data plane for transmitting the target service. The last network device deletes the reverse configuration packet on the control plane.

Optionally, the terminal network device may delete the reverse configuration packet when receiving the forward configuration packet. Optionally, the terminal network device may delete the reverse configuration message when receiving the reverse configuration success indication message. For example, after the third intermediate network device F determines that the routing configuration has been completed according to the forward configuration message, any network device between the first network device and the third intermediate network device F does not need to report the route according to the reverse configuration message. In the case that the route is configured to transmit the target service, the third intermediate network device transmits the reverse configuration success indication message to the end network device D.

In this embodiment, the end-network device transmits the deletion instruction message to the target transmission path. The deletion instruction message includes at least a target identifier, a deletion instruction and a reverse path instruction message. The network device in the target transmission path acquires a reverse configuration message including the target identifier and the reverse path indication message when receiving the deletion instruction message. The network device deletes the reverse configuration message on the control plane according to the deletion instruction.

As shown in FIG. 3 , the reverse configuration message of the last network device D has been transmitted to the second intermediate network device G and the third intermediate network device F. The third intermediate network device F has finished the transmission of the reverse configuration message. It can be seen that when the second intermediate network device G and the third intermediate network device F receive the deletion instruction message, the reverse configuration message is deleted on the control plane. The third intermediate network device F then ends the transmission of the deletion instruction message, thereby preventing the first network device A and the first intermediate network device E that have not received the reverse configuration message from processing the deletion instruction message.

It should be clearly stated that the network device that receives the deletion instruction message only deletes the reverse configuration message on the control plane, and retains the routing table configured on the data plane. Therefore, the transmission of the target service can be realized based on the routing table.

By using the method shown in this embodiment, a route of the same target transmission path is configured through two configuration packets that are concurrently transmitted in both directions. The two-way concurrent and bidirectional transmission specifically means that one forward configuration packet from the first network device is transmitted in the forward transmission direction, and the other reverse configuration packet from the last network device is transmitted in the reverse transmission direction. The route of the same target transmission path is configured through two concurrent forward configuration packets and reverse configuration packets transmitted in both directions, which effectively improves the efficiency of configuring the route of the target transmission path.

For a better understanding, the following descriptions are compared with the existing solutions:

For example, if the target transmission path includes 10 network devices connected in sequence. If the existing solution is adopted, the packets used for configuring the route from the first network device need to be transmitted in sequence among 10 network devices, so that the 10 network devices can configure routes in sequence.

However, by using the method shown in this embodiment, 5 network devices among the 10 network devices included in the target transmission path can configure routes based on forward configuration packets, and the remaining 5 network devices can configure routes according to reverse configuration packets. Configure routing.

It can be seen that if there is an existing solution to configure the target transmission path, T duration is required for configuration, and this embodiment only requires T/2 duration.

In short, in the target transmission path in the existing solution, all network devices need to configure routes according to the same configuration message, but as shown in this embodiment, some network devices configure routes according to forward configuration messages, while others Some network devices configure routes based on reverse configuration packets. This effectively reduces the time for configuring the route of the target transmission path.

In addition, in this embodiment, any network device can implement routing in both forward and reverse directions regardless of whether the route is configured according to the forward configuration message or the reverse configuration message, and there is no need to configure different routes for different service transmission directions. route in the direction.

For example, the intermediate network device F has configured a route from port F1 to port F2 for the target service. Then, if the target service is transmitted in the forward transmission direction, after receiving the target service via the port F1, the intermediate network device F can transmit the target service to the port F2, and then transmit the target service to the intermediate network device G via the port F2. If the target service is transmitted in the reverse transmission direction, after receiving the target service via the port F2, the intermediate network device F transmits the target service to the port F1, and then transmits the target service to the intermediate network device E via the port F1.

The embodiment shown in FIG. 2 illustrates how to configure the route of the target transmission path in order to realize the transmission of the target service in the target transmission path. The embodiment shown in FIG. 4 illustrates how to ensure the normal transmission of the target service if the initial transmission path for transmitting the target service fails.

Step 401: The first network device receives a fault indication message.

The fault indication message shown in this embodiment is a message conforming to the RSVP protocol, and the fault indication message is used to indicate that the initial transmission path for transmitting the target service is faulty. It can be seen that when the first network device receives the fault indication message, it is determined that the initial transmission path is faulty, and the target service cannot be continuously transmitted.

Specifically, as shown in FIG. 1 , if the initial transmission path includes network devices A, B, C and D. The cause of the failure in this example may be that the optical fiber connected between the network device B and the network device C is broken, so that the target service cannot be transmitted along the initial transmission path as an example to illustrate.

In this embodiment, if the network device B has not yet received a message from the network device C when the preset time period is exceeded, it can be determined that a fiber break occurs between the network device B and the network device C. It should be clearly stated that, in this embodiment, the description of the situation in which the network device B determines that a fiber disconnection occurs between the network device B and the network device C is an optional example, which is not limited.

The network device B generates the fault indication message, where the fault indication message includes the target identifier and the identifier of the initial transmission path. Specifically, the network device B has multiple ports, for example, ports B1, B2, . . . BN, and the specific value of N is not limited in this embodiment. If port B1 of network device B is connected to network device C through an optical fiber, and network device B determines that there is a fiber break between network device B and network device C, network device B obtains the target identifier of the target service via port B1. That is, when the optical fiber between the network device B and the network device C is disconnected, the target service with the target identifier cannot be normally transmitted between the network device B and the network device C.

It should be clearly stated that the fault shown in this embodiment is taken as an example where the optical fiber connected between the network device B and the network device C is broken. A fiber break occurs between two connected network devices. For example, a fiber break occurs between network device A and network device B.

Alternatively, the failure shown in this embodiment may also be a failure of any network device, etc., which is not specifically limited in this embodiment.

Step 402, the last network device receives the fault indication message.

For details of the fault indication message received by the end network device shown in this step, reference may be made to step 401, and details are not repeated. For example, the failure indication message is sent by the network device B in the initial transmission path to the last network device D.

For another example, when the first network device acquires the fault indication message, the first network device may forward the fault indication message to the last network device. For another example, the first network device may send the fault indication message to the network management device, and then the network management device sends the fault indication message to the last network device.

This embodiment does not limit the execution sequence between step 401 and step 402 .

Step 403: The first network device configures a route according to the forward configuration message.

The forward configuration message shown in this embodiment is used to configure the route of the target transmission path, where the target transmission path is used to transmit the target service. That is, when the initial transmission path for transmitting the target service fails, the path for transmitting the target service can be switched from the initial transmission path to the target transmission path. For the specific description of the target transmission path, please refer to the embodiment shown in FIG. 2 for details, and details are not repeated in this embodiment.

This embodiment takes the generation of the forward configuration packet by the first network device as an example. When the first network device obtains the fault indication message, according to the target identifier and the identifier of the initial transmission path included in the fault indication message, it can be known that the initial transmission path used for transmitting the target service has failed, and the target service cannot be continuously transmitted. The first network device can obtain the forward configuration packet according to protocols such as OSPF or PCEP. For the description of the specific content of the forward configuration packet and the configuration process, please refer to step 201 for details, and details are not repeated.

If the network management device obtains the forward configuration message, the first network device sends the received fault indication message to the network management device, or the network device B directly sends the fault indication message to the network management device. For the process of configuring the forward configuration message on the network management device, see the process of configuring the forward configuration message on the first network device, and details are not repeated here.

For the description of the specific process of configuring the route according to the forward configuration message by the first network device, please refer to step 201 for details, and details will not be repeated.

Step 404: The first network device sends a forward configuration message to the first intermediate network device.

For the description of the specific execution process of step 404 shown in this embodiment, please refer to the description of step 202 shown in FIG. 2 for details, and details are not repeated.

Step 405: The final network device configures a route according to the reverse configuration message.

Specifically, this embodiment is exemplified by taking the last network device configuring the reverse configuration message according to the received fault indication message as an example. For the description of the specific content of the reverse configuration message and the process of configuring the reverse configuration message by the last network device, please refer to step 203 for the specific description, which will not be repeated.

In this embodiment, the network management device can also obtain the reverse configuration message. For a specific process, please refer to step 203 shown in FIG. 2 , and details are not repeated.

For the specific process of configuring the route by the network device according to the reverse configuration message, please refer to step 203 shown in FIG. 2 for details, and details will not be repeated.

Step 406: The last network device sends a reverse configuration message to the second intermediate network device.

Step 407: The first intermediate network device receives the forward configuration message from the first network device.

Step 408: The first intermediate network device configures a route according to the forward configuration message.

Step 409: The first intermediate network device sends a forward configuration packet to the third intermediate network device.

Step 410: The second intermediate network device receives the reverse configuration message from the last network device.

Step 411: The second intermediate network device configures a route according to the reverse configuration message.

Step 412: The second intermediate network device sends a reverse configuration packet to the third intermediate network device.

Step 413: The third intermediate network device receives the forward configuration message and the reverse configuration message.

Step 414: The third intermediate network device configures a route according to the forward configuration message or the reverse configuration message.

Step 415: The third intermediate network device sends a forward configuration message to the second network device.

Step 416: The second intermediate network device sends a forward configuration message to the last network device.

Step 417: The last network device sends a response message to the first network device.

Step 418: The last network device transmits a deletion instruction message to the target transmission path.

For the specific execution process of step 406 to step 418 shown in this embodiment, please refer to step 204 to step 216 shown in FIG. 2 for details, and the specific execution process will not be repeated.

With the method shown in this embodiment, the communication system has the function of automatic recovery from failure. The first network device reacquires a target transmission path capable of transmitting the target service based on the failure indication message from the initial transmission path. The first network device transmits a forward configuration packet to the target transmission path to configure the route. The final network device will also acquire the fault indication message from the initial transmission path, and then send a reverse configuration packet to the target transmission path to configure the route.

It can be seen that in the case of failure of the initial transmission path, the route of the same target transmission path can be configured through two configuration packets concurrently transmitted in both directions, which effectively improves the efficiency of configuring the route of the target transmission path.

In addition, by using the method shown in this embodiment, since the route of the same target transmission path is configured through two configuration packets that are concurrently transmitted in both directions, in a scenario where the number of network devices included in the target transmission path increases, the route can be effectively to reduce the duration of the route to configure the destination transport path. It is avoided that the performance of the transmission path for reconfiguring the target service is degraded due to the increase in the number of network devices included in the target transmission path.

In the embodiment shown in FIG. 4 , if the initial transmission path for transmitting the target service fails, how to configure the target transmission path to ensure the normal transmission of the target service. Based on the embodiment shown in FIG. 4 , the following describes the process of how to effectively improve the efficiency of configuring the target transmission path with reference to FIG. 5 :

Step 501: The network management device receives a fault indication message.

For a specific description of the fault indication message in this embodiment, please refer to step 401 shown in FIG. 4 for details, and details are not repeated in this embodiment.

Taking the example shown in FIG. 6 , the initial transmission path for transmitting the target service includes network devices A, B, C and D. In the initial transmission path for transmitting the target service, if the network device B determines that a fiber disconnection occurs between the network device B and the network device C, the network device B sends the failure indication message to the network management device 101 .

Step 502: The network management device sends a forward configuration message to the first network device.

The fault indication message shown in this embodiment may be used to indicate a fault event. For example, the fault event shown in this embodiment is a fiber break between network device B and network device C in the initial transmission path.

After the network management device determines the fault event, in order to improve the efficiency of configuring the target transmission path, the network management device determines the target transmission path.

The target transmission path is a path for transmitting the target service, and the target transmission path includes at least one intermediate network device in the initial transmission path. It can be seen that the multiple intermediate network devices included in the target transmission path partially overlap with the multiple intermediate network devices included in the initial transmission path.

This embodiment does not limit the number of intermediate network devices on which the initial transmission path and the target transmission path overlap, as long as the optical fibers connected between any two adjacent network devices included in the target transmission path are not specified in the fault indication message. The indicated fiber with a broken fiber can be used.

Continuing to take the example shown in FIG. 6 , the initial transmission path includes network devices A, B, C and D. The target transmission paths acquired by the network management device include network devices A, B, E, F, G, C, and D. It can be seen that in the target transmission path, the network device B and the network device C are no longer directly connected through the optical fiber 600 with the broken fiber, thus ensuring that the target transmission path can transmit the target service normally.

Specifically, the network management device determines, according to the fault indication message, that the optical fiber between network device A and network device B is in a normal state, and the optical fiber between network device C and network device D is in a normal state. In order to improve the efficiency of rerouting configuration for the target service, it is not necessary to reconfigure the route between network device A and network device B, and the route between network device C and network device D again.

Comparing the initial transmission path (including network devices A, B, C, and D) and the target transmission path (including network devices A, B, E, F, G, C, and D), it can be seen that the initial path and the middle of the target transmission path Network devices B and C are overlapping intermediate network devices, so in the process of configuring the route of the target transmission path, there is no need to reconfigure the route between network device A and network device B, and the route between network device C and network device D. routing.

The network management device determines the segment transmission paths included in the target transmission path. The segment transmission path is a path in the target transmission path that needs to be routed. Wherein, the segment transmission path includes the first network device and the last network device connected in sequence, and at least one intermediate network device connected between the first network device and the last network device.

In the embodiments shown in FIG. 2 and FIG. 4 , the first network device is the source network device, that is, the first network device serves as the initiator of the target service transmitted by the target transmission path, and the last network device is the responder of the target service. Or, the last network device is the sink network device, that is, the last network device is the initiator of the target service transmitted by the target transmission path, and the first network device is the responder of the target service.

The first network device shown in this embodiment is the first network device in the segment transmission path, and the last network device is the last network device in the segment transmission path.

Continuing to refer to the above example, where the target transmission path includes network devices A, B, E, F, G, C, and D, it can be known that the segment transmission path includes network devices B, E, F, G, and C. That is, the network device A is the source network device of the responder or the initiator of the target service, and the network device D is the initiator of the target service or the sink network device of the responder. The first network device is network device B, and the last network device is network device D.

In this example, after the routes of network devices B, E, F, G, and C are configured, the configuration of the target transmission path is completed.

It should be clearly stated that this embodiment is exemplified by the network management device determining the segment transmission path according to the fault indication message, and sending a forward configuration message to the first network device of the segment transmission path as an example. In other examples, the source network device that is the responder or initiator of the target service can also send the forward configuration message to the head network device of the segment transmission path.

For example, the source network device A in the target transmission path generates a forward configuration packet according to the fault indication information. Because network device B is a network device whose initial transmission path and target transmission path overlap, network device A does not need to configure a route for the route between network device A and network device B according to the forward configuration message. Network device B serves as the first network device and is the first network device in the segment transmission path that configures the route according to the forward configuration message.

The forward configuration message shown in this embodiment is used for transmission along the forward transmission direction of the segment transmission path. The transmission direction of each network device included in the transmission path.

Step 503: The first network device configures a route according to the forward configuration message.

As shown in FIG. 6 , the first network device shown in this embodiment is the first network device in the segment transmission path, that is, the network device B. The route is configured according to the forward configuration message, so that the target service can be exchanged between the network device B and the network device E. Please refer to step 201 shown in FIG. 2 for the description of the specific process for the first network device to configure the route according to the forward configuration message, and details are not repeated in this embodiment.

Step 504: The first network device sends a forward configuration message to the first intermediate network device.

In this embodiment, the first intermediate network device is an intermediate network device E as an example for illustrative description.

For the description of the specific execution process of step 504 shown in this embodiment, please refer to step 202 shown in FIG. 2 for details, and the specific execution process will not be repeated.

Step 505: The final network device configures a route according to the reverse configuration message.

It can be known from the above step 502 that the last network device shown in this embodiment is the last network device in the segment transmission path. That is, the last network device shown in this embodiment is the network device C in the target transmission path.

For the description of the specific content of the reverse configuration packet shown in this embodiment, please refer to step 203 shown in FIG. 2 for details, and details are not repeated.

This embodiment describes several optional ways for the last network device, which is the last network device in the segment recovery path, to obtain reverse configuration packets:

way 1

The last network device can receive the forward configuration message from the network management device or the source network device. Finally, the network device generates a reverse configuration message according to the forward configuration. The reverse configuration message is used for transmission along the reverse transmission direction of the segment transmission path. The direction in which each network device transmits. And in the segment transfer path, the forward transfer direction and the reverse transfer direction are opposite.

For the description of the specific process of generating the reverse configuration message according to the forward configuration message shown in this embodiment, please refer to step 203 in the embodiment shown in FIG. 2 , and details are not repeated.

way 2

The end network device receives the forward path indication message of the segment transmission path and the target identifier of the target service.

Specifically, the network management device or the first network device shown in this embodiment may send the forward path indication message of the segment transmission path to the last network device C. The forward path indication message of the segment transmission path is used to indicate that the segment transmission path, along the forward transmission direction, sequentially includes the connection relationships of network devices B, E, F, G, and C.

The last network device generates a reverse configuration message according to the forward path indication message of the segment transmission path. For the specific process, please refer to step 203 shown in FIG. 2 for details, and details are not repeated.

way 3

The network management device or the first network device may directly send the reverse configuration message to the last network device.

way 4

The final network device can obtain the reverse configuration message according to protocols such as OSPF or PCEP. For the specific process, refer to step 203 in the embodiment shown in FIG. 2 , and details are not repeated.

Step 506: The last network device sends a reverse configuration message to the second intermediate network device.

The second intermediate network device shown in this embodiment is an intermediate network device that is adjacent to the last network device C and connected by an optical fiber among the plurality of intermediate network devices included in the segment transmission path. Taking the example shown in FIG. 6 , the second intermediate network device is a network device G that is connected to the last network device C through an optical fiber.

Step 507: The first intermediate network device receives the forward configuration message from the first network device.

Step 508: The first intermediate network device configures a route according to the forward configuration message.

For the description of the specific execution process of step 507 to step 508 shown in this embodiment, please refer to step 205 to step 206 shown in FIG. 2 , and details are not repeated.

Step 509: The first intermediate network device sends a forward configuration packet to the third intermediate network device.

The third intermediate network device shown in this embodiment is an intermediate network device that is adjacent to the first intermediate network device and is connected by an optical fiber among the plurality of intermediate network devices included in the segment transmission path. Taking the example shown in FIG. 6 , the third intermediate network device is a network device F connected to the first intermediate network device E through an optical fiber.

Step 510: The second intermediate network device receives the reverse configuration message from the last network device.

Step 511: The second intermediate network device configures a route according to the reverse configuration message.

Step 512: The second intermediate network device sends a reverse configuration packet to the third intermediate network device.

Step 513: The third intermediate network device receives the forward configuration message and the reverse configuration message.

Step 514: The third intermediate network device configures a route according to the forward configuration message or the reverse configuration message.

Step 515: The third intermediate network device sends a forward configuration message to the second network device.

Step 516: The second intermediate network device sends a forward configuration message to the last network device.

Step 517: The last network device sends a response message to the first network device.

Step 518: The last network device transmits a deletion instruction message to the target transmission path.

For the description of the specific execution process of steps 510 to 518 shown in this embodiment, please refer to steps 208 to 216 shown in FIG. 2 for details, and details are not repeated.

In this embodiment, after each network device included in the segment transmission path completes the routing configuration, the target transmission path can realize the transmission of the target service.

With the method shown in this embodiment, if the initial transmission path fails, the transmission path of the target service can be switched from the initial transmission path to the target transmission path, so as to realize rerouting of the target service. Moreover, as shown in this embodiment, it is not necessary to reconfigure the routes of all network devices included in the target transmission path, and only the routes of the network devices included in the segment transmission paths included in the target transmission path need to be configured. There is no need to configure routes for all network devices included in the target transmission path, which reduces the number of network devices to be configured with routes, and effectively improves the efficiency of rerouting the target service. In a scenario where the number of network devices included in the target transmission path increases, the amount of data processed by a single station of the network device is effectively reduced, and the possibility of congestion of the network device is reduced.

The network device in this application will be described below with reference to FIG. 7 . The network device includes a processor 701, a memory 702 and an optical transceiver 703. The processor 701, the memory 702 and the optical transceiver 703 are interconnected by wires. Among them, the memory 702 is used for storing program instructions and data.

If the network device shown in this embodiment is an intermediate network device in the target transmission path, the memory 702 stores the program instructions and data that are executed by the intermediate network device in the steps shown in FIG. 2 , FIG. 4 and FIG. 5 . The optical transceiver 701 and the optical transceiver 703 are used to perform the method steps shown in any of the embodiments of FIG. 2 , FIG. 4 and FIG. 5 .

If the network device shown in this embodiment is the first intermediate network device, in FIG. 2 , the optical transceiver 703 is used to execute step 205 and step 207 . The processor 701 is configured to execute step 206 . In FIG. 4 , optical transceiver 703 is used in step 407 and step 409 . The processor 701 is configured to perform step 408 . In FIG. 5 , optical transceiver 703 is used in step 507 and step 509 . The processor 701 is configured to perform step 508 .

If the network device shown in this embodiment is the second intermediate network device, in FIG. 2 , the optical transceiver 703 is used to perform step 208 and step 210 . The processor 701 is configured to execute step 209 . In FIG. 4 , optical transceiver 703 is used in step 410 and step 412 . The processor 701 is configured to execute step 411 . In FIG. 5 , optical transceiver 703 is used in step 510 and step 512 . The processor 701 is configured to execute step 511 .

If the network device shown in this embodiment is the third intermediate network device, in FIG. 2 , the optical transceiver 703 is used to execute step 211 and step 213 . The processor 701 is configured to execute step 212 . In FIG. 4 , optical transceiver 703 is used for step 413 and step 415 . The processor 701 is used to perform step 414 . In FIG. 5 , optical transceiver 703 is used in step 513 and step 515 . The processor 701 is configured to perform step 514 .

If the network device shown in this embodiment is an end-network device, in FIG. 2 , the optical transceiver 703 is used to execute step 204 , step 215 and step 216 . The processor 701 is configured to execute step 203 . In FIG. 4 , the optical transceiver 703 is used in steps 402 , 406 , 417 and 418 . The processor 701 is configured to execute step 405 . In FIG. 5 , the optical transceiver 703 is used in steps 506 , 517 and 518 . The processor 701 is configured to execute step 505 .

The embodiments of the present application also provide a digital processing chip. The digital processing chip integrates a circuit and one or more interfaces for realizing the functions of the above-mentioned processor 701 . When a memory is integrated in the digital processing chip, the digital processing chip can perform the method steps of any one or more of the foregoing embodiments. When no memory is integrated in the digital processing chip, it can be connected with an external memory through an interface. The digital processing chip implements any of the above-mentioned embodiments in FIG. 2 , FIG. 4 and FIG. 5 according to the program code stored in the external memory.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above embodiments can be completed by hardware, or can be completed by instructing relevant hardware by a program. The program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a random access memory, or the like. Specifically, for example, the above-mentioned processing unit or processor may be a central processing unit, a general-purpose processor, a digital signal processor (digital signal processing, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

Whether the above functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Finally, it should be noted that: the above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed by the present application can easily think of changes. Or replacement should be covered within 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 (25)

1. A routing configuration method, characterized in that, the method is applied to a target transmission path, and the target transmission path includes a first network device, at least one intermediate network device, and a last network device connected in sequence, and the method includes:

   receiving, by the intermediate network device, a first configuration packet, where the first configuration packet is transmitted along the first transmission direction in the target transmission path;

   The intermediate network device configures the route between the intermediate network device and the adjacent network device according to the first configuration message, and in the target transmission path, the positions of the intermediate network device and the adjacent network device are adjacent and interconnected;

   receiving, by the intermediate network device, a second configuration packet, the second configuration packet is transmitted in the target transmission path along a second transmission direction, and the first transmission direction and the second transmission direction are opposite;

   If the intermediate network device determines that the first configuration packet and the second configuration packet satisfy a preset condition, the intermediate network device determines that no route is to be configured according to the second configuration packet, and the preset It is assumed that the first configuration packet and the second configuration packet are both used to configure the route of the target transmission path, and the target transmission path is used to transmit the target service.
2. The method according to claim 1, wherein, if the first configuration packet comes from the first network device, and the second configuration packet comes from the last network device, the intermediate network device according to the After the first configuration message configures the route between the intermediate network device and the adjacent network device, the method further includes:

   sending, by the intermediate network device, the first configuration message to the last network device;

   After the intermediate network device determines that the route is no longer configured according to the second configuration message, the method further includes:

   The intermediate network device ends the transmission of the second configuration message.
3. The method according to claim 1, wherein, if the first configuration packet comes from the last network device, and the second configuration packet comes from the first network device, the intermediate network device according to the After the first configuration message configures the route between the intermediate network device and the adjacent network device, the method further includes:

   sending, by the intermediate network device, the first configuration message to the first network device;

   After the intermediate network device determines that the route is no longer configured according to the second configuration message, the method further includes:

   The intermediate network device sends the second configuration message to the last network device.
4. The method according to any one of claims 1 to 3, wherein determining, by the intermediate network device, that the first configuration packet and the second configuration packet satisfy a preset condition comprises:

   The intermediate network device determines that the first configuration packet and the second configuration packet satisfy a first preset sub-condition, where the first preset sub-condition is the first configuration packet and the second configuration packet The configuration packets all include the target identifier of the target service, and the first configuration packet includes a first indication message for indicating the first transmission direction, and the second configuration packet includes a first indication message for indicating the first transmission direction. A second indication message of the second transmission direction;

   And the intermediate network device determines that the first configuration packet and the second configuration packet satisfy a second preset sub-condition, where the second preset sub-condition is the first configuration packet and the first configuration packet. Both configuration packets are used to configure the route of the target transmission path.
5. The method according to claim 1, wherein the method further comprises:

   The intermediate network device receives a deletion instruction message, and if the first configuration packet comes from the end network device, the deletion instruction message is used to instruct deletion of the first configuration packet, or, if the second configuration packet is If the configuration message comes from the last network device, the deletion instruction message is used to instruct to delete the second configuration message.
6. A routing configuration method, characterized in that the method is applied to a target transmission path, the target transmission path includes a plurality of network devices, and the target transmission path is used to send the last network device included in the target transmission path to the Transmitting a forward configuration message, the method includes:

   The terminal network device obtains a reverse configuration packet, and the reverse configuration packet and the forward configuration packet are transmitted in opposite directions in the target transmission path;

   The last network device sends a reverse configuration packet to the first network device, where the reverse configuration packet is used to instruct the first network device to configure a route between the first network device and the second network device, The first network device and the second network device are any two network devices included in the target transmission path that are located adjacent to each other and are connected to each other.
7. The method according to claim 6, wherein the acquisition of the reverse configuration message by the last network device comprises:

   The last network device acquires a reverse path indication message, where the reverse path indication message is used to indicate the connection relationship between the multiple network devices along the reverse transmission direction, and the reverse transmission direction is the reverse transmission direction. the transmission direction of the configuration message in the target transmission path;

   The end-network device acquires the reverse configuration message according to the reverse path indication message.
8. The method according to claim 7, wherein the acquisition of the reverse path indication message by the end-network device comprises:

   The last network device obtains a forward path indication message, where the forward path indication message is used to indicate the connection relationship between the multiple network devices along the forward transmission direction, and the forward transmission direction is the forward transmission direction. the transmission direction of the configuration message in the target transmission path;

   The end-network device converts the forward path indication message into the reverse path indication message.
9. The method according to claim 6, wherein the method further comprises:

   The end-network device receives a fault indication message, where the fault indication message is used to indicate that the initial transmission path is faulty, and the fault indication message includes the target identifier of the target service, wherein both the initial transmission path and the target transmission path are For transmitting the target service, among the multiple network devices included in the initial transmission path and the multiple network devices included in the target transmission path, some network devices are the same;

   The last network device converting the forward path indication message into the reverse path indication message includes:

   When the last network device determines that both the forward path indication message and the fault indication message include the target identifier of the target service, the last network device converts the forward path indication message into the Reverse path indication message.
10. The method according to any one of claims 6 to 9, wherein the method further comprises:

    receiving, by the last network device, the forward configuration message;

    The last network device sends a response message to the first network device via the target transmission path, where the response message is used to indicate whether any two adjacent and mutually connected network devices included in the target transmission path The routing between the two has been successfully configured.
11. The method according to any one of claims 6 to 10, wherein after the last network device sends a reverse configuration packet to the first network device, the method further comprises:

    The last network device deletes the reverse configuration message;

    The last network device sends a deletion instruction message to the first network device, where the deletion instruction message is used to instruct the first network device to delete the reverse configuration message.
12. A network device, characterized in that the network device is an intermediate network device connected between a first network device and a last network device in a target transmission path, and the intermediate network device includes a processor, a memory, and an optical transceiver, Wherein, the processor, the memory and the optical transceiver are interconnected through lines;

    The optical transceiver is configured to receive a first configuration message, and the first configuration message is transmitted along the first transmission direction in the target transmission path;

    The processor invokes the program code in the memory to configure the route between the intermediate network device and the adjacent network device according to the first configuration message, and in the target transmission path, the The intermediate network device and the adjacent network device are located adjacent to each other and connected to each other;

    The optical transceiver is further configured to receive a second configuration packet, the second configuration packet is transmitted along the second transmission direction in the target transmission path, the first transmission direction and the second transmission direction on the contrary;

    The processor is further configured to, if the processor determines that the first configuration packet and the second configuration packet satisfy a preset condition, the processor determines that the second configuration packet is no longer based on the second configuration packet. A route is configured, and the preset condition is that both the first configuration message and the second configuration message are used to configure the route of the target transmission path, and the target transmission path is used to transmit the target service.
13. The network device according to claim 12, wherein if the first configuration message comes from the first network device, the second configuration message comes from the last network device;

    The optical transceiver is further configured to send the first configuration message to the end-network device;

    The processor is further configured to end the transmission of the second configuration message.
14. The network device according to claim 12, wherein if the first configuration message comes from the last network device, and the second configuration message comes from the first network device, the optical transceiver further uses At:

    sending the first configuration message to the first network device;

    Send the second configuration message to the last network device.
15. The network device according to any one of claims 12 to 14, wherein the processor is specifically configured to:

    It is determined that the first configuration packet and the second configuration packet satisfy a first preset sub-condition, where the first preset sub-condition is that both the first configuration packet and the second configuration packet include The target identifier of the target service, and the first configuration message includes a first indication message for indicating the first transmission direction, and the second configuration message includes a message for indicating the second transmission direction. the second instruction message;

    It is determined that the first configuration packet and the second configuration packet satisfy a second preset sub-condition, where the second preset sub-condition is that both the first configuration packet and the second configuration packet use for configuring the route of the target transmission path.
16. The network device according to claim 12, wherein the optical transceiver is further used for:

    Receive a deletion instruction message, if the first configuration packet comes from the end-network device, the deletion instruction message is used to instruct the deletion of the first configuration packet, or, if the second configuration packet comes from a the last network device, the deletion instruction message is used to instruct deletion of the second configuration message.
17. A network device, characterized in that, the network device is an end network device in a target transmission path, the target transmission path includes a plurality of network devices, and the target transmission path is used to transmit a forward direction to the end network device A configuration message, the end-network device includes a processor, a memory, and an optical transceiver, wherein the processor, the memory, and the optical transceiver are interconnected through lines;

    The processor invokes the program code in the memory to obtain a reverse configuration message, where the reverse configuration message and the forward configuration message are in opposite directions in the target transmission path transmission;

    The optical transceiver is further configured to send a reverse configuration message to the first network device, where the reverse configuration message is used to instruct the first network device to configure the relationship between the first network device and the second network device. The first network device and the second network device are any two adjacent and mutually connected network devices included in the target transmission path.
18. The network device according to claim 17, wherein the processor is specifically configured to:

    Obtain a reverse path indication message, where the reverse path indication message is used to indicate the connection relationship between the multiple network devices along the reverse transmission direction, and the reverse transmission direction is that the reverse configuration message is in the the transmission direction in the target transmission path;

    Acquire the reverse configuration message according to the reverse path indication message.
19. The network device according to claim 18, wherein the processor is specifically configured to:

    Obtain a forward path indication message, where the forward path indication message is used to indicate the connection relationship between the multiple network devices along the forward transmission direction, and the forward transmission direction is that the forward configuration packet is in the forward direction. the transmission direction in the target transmission path;

    Converting the forward path indication message into the reverse path indication message.
20. The network device according to claim 17, wherein,

    The optical transceiver is further configured to receive a fault indication message, where the fault indication message is used to indicate that an initial transmission path is faulty, and the fault indication message includes a target identifier of a target service, wherein the initial transmission path and the The target transmission paths are all used to transmit the target service, and some of the network devices included in the multiple network devices included in the initial transmission path and the multiple network devices included in the target transmission path are the same;

    The processor is specifically configured to convert the forward path indication message into the reverse direction when it is determined that both the forward path indication message and the fault indication message include the target identifier of the target service Path indication message.
21. The network device according to any one of claims 17 to 20, wherein the optical transceiver is further used for:

    receiving the forward configuration message;

    Send a response message to the first network device via the target transmission path, where the response message is used to indicate that the route between any two adjacent and mutually connected network devices included in the target transmission path has been configured success.
22. The network device according to any one of claims 17 to 21, wherein,

    The processor is further configured to delete the reverse configuration message;

    The optical transceiver is further configured to send a deletion instruction message to the first network device, where the deletion instruction message is used to instruct the first network device to delete the reverse configuration message.
23. A communication system, characterized in that it includes a target transmission path, and the target transmission path includes a first network device, at least one intermediate network device, and an end network device connected in sequence, and the intermediate network device is as described in any one of claims 12 to 16 As shown in the item, the end-network device is as shown in any one of claims 17 to 22.
24. A digital processing chip, characterized in that, the digital processing chip includes a processor and a memory, the memory and the processor are interconnected through a line, and instructions are stored in the memory, and the processor is used to execute the process as claimed in the claims. The method of any one of 1 to 11.
25. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 11.

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