CN113328931A

CN113328931A - Route issuing method and device

Info

Publication number: CN113328931A
Application number: CN202110439432.2A
Authority: CN
Inventors: 马臻; 黄李伟
Original assignee: New H3C Big Data Technologies Co Ltd
Current assignee: New H3C Big Data Technologies Co Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-08-31
Anticipated expiration: 2041-04-23
Also published as: CN113328931B

Abstract

The application provides a route issuing method and a device, the method is applied to a first network device in an EVPN network, the EVPN network also comprises a second network device, and the method comprises the following steps: determining a target fifth type EVPN route of the first network equipment for providing flow forwarding service from all the fifth type EVPN routes by using a load sharing algorithm; newly adding first priority indication information in a target fifth type EVPN route; adding second priority indication information in the fifth type EVPN routes except the target fifth type EVPN route in all the fifth type EVPN routes; and issuing all the fifth types of EVPN routes subjected to the newly adding operation to second network equipment in the EVPN network, so that the second network equipment starts the fifth types of EVPN routes corresponding to the first priority indication information after receiving the fifth types of EVPN routes.

Description

Route issuing method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for routing delivery.

Background

In VXLAN (Virtual Extensible Local Access Network) networks, an Ethernet Virtual Private Network (EVPN) is widely used. The EVPN is a two-layer VPN technology, the control plane adopts MP-BGP to announce EVPN routing information, and the data plane adopts VXLAN encapsulation mode to forward messages. When physical sites of tenants are scattered at different positions, the EVPN can provide two-layer interconnection for the same subnet of the same tenant based on the existing service provider or enterprise IP network; and three-layer interconnection is provided for different subnets of the same tenant through the EVPN, and three-layer interconnection with an external network is provided for the subnets.

In practical scenarios, EVPN usually adopts a hierarchical structure of Spine (core) -Leaf (branch), as shown in fig. 1. The device of the Leaf layer is used as a VXLAN Tunnel End Point (VTEP) and is used for carrying out EVPN related processing on the message; and the device of the Spine layer is a core device and is used for forwarding the message according to the destination IP address of the message. When devices in the EVPN network belong to the same Autonomous System (AS), in order to avoid establishing an Inner Border Gateway Protocol (IBGP) peer between all VTEPs, a core device may be configured AS a Route Reflector (RR), and at this time, the RR needs to issue and receive a fifth type of EVPN Route, but does not need to encapsulate and decapsulate a VXLAN packet.

In fig. 1, two RR devices backup each other, and provide a primary EVPN route and a backup EVPN route for a VTEP device, where the traffic is the traffic of a Server (Server) in a Site (Site1 or Site2) accessing the VTEP. When RR equipment failure or upgrade occurs, switching to a backup route can be performed, and service is continuously provided. However, since the routes provided by the two RR devices are identical, this is necessarily preferred. For example, the route in one RR device is the master route, and the route in the other RR device is the standby route. If the main RR equipment fails, all routes are preferably issued again, and the time for switching the routes is longer. In the prior art, although the underlay equivalent route is provided, the load balance of traffic from the VTEP to the Spine can be realized, but the problem that the VTEP route is preferable again and issued cannot be solved, and the switching speed is affected.

Therefore, how to solve the problem of slow switching speed caused by re-optimizing the route in the prior art when the RR device fails is one of the considerable technical problems.

Disclosure of Invention

In view of this, the present application provides a route issuing method, which is used to solve the problem of slow switching speed caused by re-optimizing a route in the prior art when an RR device fails.

Specifically, the method is realized through the following technical scheme:

according to a first aspect of the present application, a route issuing method is provided, which is applied to a first network device in an ethernet virtual private network EVPN network, where the EVPN network further includes a second network device, and the method includes:

determining a target fifth type EVPN route of the first network equipment for providing flow forwarding service from all the fifth type EVPN routes by utilizing a load sharing algorithm;

adding first priority indication information in the target fifth type EVPN route to indicate that the target fifth type EVPN route is a high-priority route;

adding second priority indication information in the fifth type EVPN routes except the target fifth type EVPN route in all the fifth type EVPN routes to indicate that the fifth type EVPN routes except the target fifth type EVPN route are low-priority routes;

and issuing all the fifth types of EVPN routes subjected to the newly adding operation to second network equipment in the EVPN network, so that the second network equipment starts the fifth types of EVPN routes corresponding to the first priority indication information after receiving the fifth types of EVPN routes.

According to a second aspect of the present application, a route issuing method is provided, which is applied to a second network device in an ethernet virtual private network EVPN network, where the EVPN network further includes a first network device and a third network device, and the first network device and the third network device have the same fifth type EVPN route, and the method includes:

receiving a fifth type of EVPN route respectively issued by the first network equipment and the third network equipment;

analyzing priority indication information from the fifth type EVPN route;

if the priority indication information is first priority indication information, enabling the fifth type of EVPN routing and forwarding the traffic of the second network device to the first network device or a third network device by using the fifth type of EVPN routing, wherein the first priority indication information is used for indicating that the fifth type of EVPN routing is a high-priority routing;

if the priority indication information is second priority indication information, not enabling the fifth type of EVPN routing, wherein the second priority indication information is used for indicating that the fifth type of EVPN routing is a low-priority routing;

and when the third network equipment fails, starting a backup fifth type EVPN route issued by the first network equipment, wherein the backup fifth type EVPN route corresponds to a fifth type EVPN route issued by the third network equipment and including second priority indication information.

According to a third aspect of the present application, there is provided a route issuing apparatus, which is disposed in a first network device in an ethernet virtual private network EVPN network, where the EVPN network further includes a second network device, the apparatus including:

the determining module is used for determining a target fifth type EVPN route of the first network equipment for providing flow forwarding service from all the fifth type EVPN routes by utilizing a load sharing algorithm;

an information adding module, configured to add first priority indication information in the target fifth type EVPN route to indicate that the target fifth type EVPN route is a high-priority route;

the information adding module is further used for adding second priority indication information in the fifth type EVPN routes except the target fifth type EVPN route in all the fifth type EVPN routes so as to indicate the fifth type EVPN routes except the target fifth type EVPN route as low-priority routes;

and the route issuing module is used for issuing all the fifth types of EVPN routes subjected to the newly adding operation to the second network equipment in the EVPN network so that the second network equipment starts the fifth types of EVPN routes corresponding to the first priority indication information after receiving the fifth types of EVPN routes.

According to a fourth aspect of the present application, a route issuing apparatus is provided, where the route issuing apparatus is disposed in a second network device in an ethernet virtual private network EVPN network, the EVPN network further includes a first network device and a third network device, and the first network device and the third network device have a same fifth type EVPN route, and the apparatus includes:

the receiving module is used for receiving a fifth type of EVPN route issued by the first network equipment and the third network equipment respectively;

the analyzing module is used for analyzing the priority indication information from the fifth type of EVPN route;

an enabling module, configured to enable the fifth type of EVPN routing and forward traffic of the second network device to the first network device or a third network device using the fifth type of EVPN routing if the priority indication information is first priority indication information, where the first priority indication information is used to indicate that the fifth type of EVPN routing is a high-priority routing; if the priority indication information is second priority indication information, not enabling the fifth type of EVPN routing, wherein the second priority indication information is used for indicating that the fifth type of EVPN routing is a low-priority routing;

the enabling module is further configured to enable a backup fifth type EVPN route issued by the first network device when the third network device fails, where the backup fifth type EVPN route corresponds to a fifth type EVPN route issued by the third network device and including second priority indication information.

The beneficial effects of the embodiment of the application are as follows:

before the fifth type of EVPN routes are issued, the first network equipment adds the first priority indication information or the second priority indication information in all the fifth type of EVPN routes to indicate the priority of each fifth type of EVPN route issued by the first network equipment, and after the priority indication information is added, the second network equipment can start the high-priority fifth type of EVPN routes based on the priority indication information, and then can forward the flow needing to be forwarded by the first network equipment to the first network equipment by using the high-priority fifth type of EVPN routes, thereby realizing the forwarding of the flow; in addition, since the second network device only enables the high-priority EVPN routing type V in the application, therefore, when other network devices sending the route fail, only the high-priority type five EVPN routes of the other network devices need to be enabled in the backup route corresponding to the network device (such as the first network device) that does not fail, in this way, the traffic can be sent to the first network device by using the backup route, that is, the second network device only needs to re-optimize the high-priority EVPN route of the failed network device, does not need to re-optimize all the EVPN routes of the fifth type, therefore, when the network device with the main-standby relationship in the prior art fails to send the route, the second network device needs to re-optimize all the fifth type EVPN routes, which causes the problem of slow switching speed.

Drawings

Fig. 1 is an architectural diagram of an EVPN networking network;

fig. 2 is a flowchart of a route issuing method implemented by a first network device according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a community extension attribute provided in an embodiment of the present application;

fig. 4 is a schematic flowchart of a route issuing method implemented by a second network device according to an embodiment of the present application;

fig. 5 is a schematic view of an application scenario of the route issuing method provided in this embodiment;

fig. 6 is a schematic structural diagram of a route issuing device according to this embodiment;

fig. 7 is a second schematic structural diagram of a route issuing device provided in this embodiment;

fig. 8 is a schematic diagram of a hardware structure of an electronic device implementing a route issuing method according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with aspects such as the present application.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the corresponding listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

The following describes the route issuing method provided by the present application in detail.

Referring to fig. 2, fig. 2 is a flowchart of a route issuing method provided in the present application, where the method is applied to a first network device in an EVPN network, the EVPN network further includes a second network device, and the first network device may implement the method, and include the following steps:

s201, determining a target fifth type EVPN route of the first network device providing the traffic forwarding service from all the fifth type EVPN routes by using a load sharing algorithm.

In this step, the first network device may be a core device of a first network layer in the EVPN network, and the core device of the first network layer may include a plurality of core devices, and when the first network layer includes a plurality of core devices, fifth type EVPN routes on each core device are the same. In order to ensure the route balance of the fifth type EVPN routes on each core device, a load sharing algorithm may be used to determine the fifth type EVPN route in which each core device provides the traffic forwarding service, so as to determine the fifth type EVPN route in which the first network device provides the traffic forwarding service, that is, the target fifth type EVPN route.

It should be noted that the load sharing algorithm may adopt a current load sharing algorithm, and the present application does not limit the load sharing algorithm, and aims to ensure that each core device of the first network layer provides route balancing of the traffic forwarding service.

Specifically, when load sharing is performed, hash calculation may be performed on addresses of all core devices in the first network layer, and then based on a hash calculation result, a target fifth type EVPN route for the first network device to provide a traffic forwarding service is determined.

S202, adding first priority indication information in the target fifth type EVPN route to indicate that the target fifth type EVPN route is a high-priority route.

In this step, when the load sharing calculates the target fifth type EVPN routes of the first network device, a first priority indication information may be added to each target fifth type EVPN route, where the first priority indication information indicates that the target fifth type EVPN route is a high-priority route.

S203, adding second priority indication information in the fifth type EVPN routes except the target fifth type EVPN route in all the fifth type EVPN routes to indicate that the fifth type EVPN routes except the target fifth type EVPN route are low-priority routes.

In this step, after the target fifth type EVPN route is determined, second priority indication information may be added to each remaining fifth type EVPN route except the target fifth type EVPN route in all the fifth type EVPN routes in the first network layer to indicate that the remaining fifth type EVPN route is a low-priority route.

And S204, issuing all the fifth types of EVPN routes subjected to the newly adding operation to second network equipment in the EVPN network, so that the second network equipment starts the fifth types of EVPN routes corresponding to the first priority indication information after receiving the fifth types of EVPN routes.

In this step, after performing new priority indication information (first priority indication information or second priority indication information) on each fifth type EVPN route, the first network device may issue all the new fifth type EVPN routes to the second network device. In this way, after receiving the fifth type EVPN route sent by the first network device, the second network device may enable the fifth type EVPN route including the first priority indication information (i.e., high priority), that is, enable the target fifth type EVPN route, so that when the first network device subsequently uses the target fifth type EVPN route to forward traffic, the first network device may forward the traffic to the first network device.

It should be noted that the second network device may be disposed in a second network layer of the EVPN network, and is a device in the second network layer.

By implementing the route issuing method provided by the application, the first network device adds the first priority indication information or the second priority indication information in all the fifth type EVPN routes before issuing the fifth type EVPN routes to indicate the priority of each fifth type EVPN route issued by the first network device, and after the priority indication information is added, the second network device can start the high-priority fifth type EVPN routes based on the priority indication information, and then can forward the traffic needing to be forwarded by using the first network device to the first network device by using the high-priority fifth type EVPN routes, thereby realizing the forwarding of the traffic; in addition, since the second network device only enables the high-priority EVPN routing type V in the application, therefore, when other network devices sending the route fail, only the high-priority type five EVPN routes of the other network devices need to be enabled in the backup route corresponding to the network device (such as the first network device) that does not fail, in this way, the traffic can be sent to the first network device by using the backup route, that is, the second network device only needs to re-optimize the high-priority EVPN route of the failed network device, does not need to re-optimize all the EVPN routes of the fifth type, therefore, when the main network device fails when the RR device having the primary-backup relationship in the prior art issues the route, and the client of the leaf layer needs to re-optimize all the EVPN routes of the fifth type, so that the switching speed is slow.

Optionally, based on the foregoing embodiment, the EVPN network provided in this embodiment further includes a third network device, where the third network device is in the same designated domain as the first network device, and all network devices in the designated domain have the same fifth type EVPN route, that is, the first network device and the third network device are both in the same network layer, and the third network device also uses the flow shown in fig. 2 to issue a route. That is to say, when the first network layer includes the first network device and the third network device, and the first network device and the third network device are both core devices of the first network layer, at this time, the first network device and the third network device may be configured in the same specified domain, and then the two network devices may respectively perform route sharing by using a load sharing algorithm, for example, half of each of the fifth-type EVPN routes is used as a route for performing traffic forwarding, that is, the two network devices both correspond to respective target fifth-type EVPN routes. It should be noted that the target EVPN route of the first network device is different from the target EVPN route of the third network device, so that it can be ensured that the second network device receives the fifth EVPN routes issued by the first network device and the third network device, and the traffic can be distributed to the first network device and the third network device in a balanced manner through the priority indication information in each EVPN route, thereby implementing balanced processing of the traffic.

On this basis, the route issuing method provided in this embodiment further includes: when the third network equipment fails, performing load sharing calculation on a fifth type EVPN route of the third network equipment providing flow forwarding service, and determining the fifth type EVPN route required to be shared by the first network equipment; adding first priority indication information in the fifth type of EVPN route needing to be shared to indicate that the fifth type of EVPN route needing to be shared is a high-priority route; and issuing all the fifth types of EVPN routes subjected to the newly adding operation to second network equipment in the EVPN network.

Specifically, when the third network device fails, because the third network device itself provides the fifth type EVPN route of the traffic forwarding service, when the third network device fails, it is necessary to allow other core devices in the first network layer to share the fifth type EVPN route of the traffic forwarding service provided by the third network device itself, based on this, the first network device performs sharing processing on the fifth type EVPN route of the traffic forwarding service provided by the third network device itself to obtain the fifth type EVPN route that the first network device needs to share, and then adds the first priority indication information in the fifth type EVPN route that needs to share to indicate that the fifth type EVPN route that needs to share is a high-priority route, and then the first network device issues the fifth type EVPN route to which the first priority indication information is added and the fifth type EVPN route to which the second priority indication information is added to the second network device, such that the second network device enables EVPN routing of a fifth type that includes the first priority indication information. Therefore, when the third network equipment fails, the load of the route is shared and processed. Since only the fifth type EVPN routes used for providing the traffic forwarding service before the failed third network device need to be load-shared, and all the fifth type EVPN routes are not required to participate in the load-sharing calculation, the situation that the switching performance is poor when all the fifth type EVPN routes are load-shared in calculation can be avoided.

Optionally, the first network device is in a specified domain, and all network devices in the specified domain have the same EVPN route of the fifth type; on this basis, the route issuing method provided in this embodiment further includes:

and when the network equipment is newly added in the designated domain, continuously executing the step of determining the target fifth type EVPN route of the flow forwarding service provided by the first network equipment from all the fifth type EVPN routes by using the load sharing algorithm.

Specifically, when a network device is added to the first network layer, taking an example of adding a fourth network device as an example for explanation, in order to enable the fourth network device to participate in the route load sharing, in this embodiment, the fourth network device is configured in a specified domain, and the fourth network device and the first network device participate in the route sharing together, that is, both the first network device and the fourth network device may continue to execute the flow shown in fig. 2 for route delivery.

Optionally, the first priority indication information is set in an extended community attribute in the EVPN route of the corresponding target type five; and the second priority indication information is set in the extended community attribute in the corresponding fifth type EVPN route.

Specifically, a preference value attribute dedicated to EVPN may be set in the extended community attribute and represented by EVPN Preferred-value, where the preference value attribute corresponding field is used to store the first priority indication information or the second priority indication information to represent the priority of the EVPN route corresponding to the fifth type. It should be noted that the preference value attribute is only exchanged between core devices of the first network layer (i.e., between IBGP peers), and is not advertised to other AS. And when the value of the EVPN Preferred-value is the first priority indication information, it indicates that the fifth type of EVPN route including the first priority indication information is the optimal route. In practical applications, the format of EVPN Preferred-value may be as shown in fig. 3, where 8 bits in fig. 3 are used to define EVPN Preferred-value to identify a bit in the extended community attribute for storing the preference value attribute, for example, the 8 bits above may be defined as 0x04 or 0x44, etc.; the lower 8 bits in fig. 3, namely the prefer-value, are used to fill the first priority indication information or the second priority indication information, where the value range of the lower 8 bits may be, but is not limited to, 0x 00-0 xFF, and a larger value indicates that the priority of the corresponding fifth type of EVPN route is higher; the smaller the value is, the lower the priority of the corresponding fifth type EVPN route is.

In addition, the extended community attribute may be reserved for other fields besides the preferred value attribute, for example, 0 may be set.

It should be noted that, in this embodiment, a value of the first priority indication information may be 0xFF, which is described by taking the first network device as an example, and 0xFF is added to a target fifth type EVPN route used for providing a traffic forwarding service for the first network device, so as to indicate that the target fifth type EVPN route belongs to a high-priority route for the first network device. Similarly, in this embodiment, the value of the second priority indication information may be 0x00, and taking the first network device as an example, 0x00 is added to the fifth type EVPN routes, except for the target fifth type EVPN route, in all the fifth type EVPN routes in the first network device, so as to indicate that the fifth type EVPN routes except for the target fifth type EVPN route belong to a route with a low priority for the first network device.

Based on the same inventive concept, this embodiment further provides a route issuing method, which is applied to a second network device in an EVPN network, where the EVPN network further includes a first network device and a third network device, and the first network device and the third network device have the same fifth type of EVPN route, and on this basis, when the second network device implements the route issuing method, the route issuing method may be implemented according to a flow shown in fig. 4, and includes the following steps:

s401, receiving a fifth type of EVPN routes respectively issued by the first network device and the third network device.

In this step, the first network device and the third network device are located in the first network layer, that is, the first network device and the third network device have the same fifth type EVPN route, and the first network device and the third network device are located in the same designated domain. After the first network device and the third network device perform routing load sharing and newly-added priority indication information, all the fifth types of EVPN routes subjected to the newly-added operation are respectively issued to the second network device. The second network equipment is arranged at the second network layer and used for docking

S402, analyzing the priority indication information from the fifth type of EVPN route.

In this step, the second network device receives all the fifth types of EVPN routes respectively issued by the multiple core devices (the first network device, the third network device, and so on) in the first network layer. Taking the first network device as an example for explanation, the second network device may analyze the fifth types of EVPN routes issued by the first network device one by one, and then analyze the priority indication information from each of the fifth types of EVPN routes.

Optionally, the priority indication information is set in the extended community attribute corresponding to the fifth type of EVPN route, and on this basis, the priority indication information may be analyzed from the extended community attribute of each fifth type of EVPN route, as shown in fig. 3, where the prefer-value in fig. 3 is a value of the priority indication information of the fifth type of EVPN route.

S403, if the priority indication information is first priority indication information, enabling a fifth EVPN routing and forwarding the traffic of the second network device to the first network device or a third network device by using the fifth EVPN routing, where the first priority indication information is used to indicate that the fifth EVPN routing is a high-priority routing.

In this step, if the priority indication information analyzed from the fifth type of EVPN route by the second network device is 0xFF, that is, the analyzed priority indication information is the first priority indication information, it indicates that the fifth type of EVPN route is a high-priority route, and then the high-priority EVPN route issued by the first network device is started at this time. In this way, after the second network device acquires the traffic, if the route adopted by the calculation is the fifth type EVPN route with the high priority issued by the first network device, the second network device may forward the traffic to the first network device using the calculated fifth type EVPN route, and the first network device provides the traffic forwarding service.

S404, if the priority indication information is second priority indication information, the fifth type of EVPN routing is not enabled, and the second priority indication information is used for indicating that the fifth type of EVPN routing is a low-priority routing.

In this step, if the second network device analyzes the priority indication information 0x00 from the fifth type EVPN route, that is, if the analyzed priority indication information is the second priority indication information, it indicates that the fifth type EVPN route is a low-priority route, and the low-priority fifth type EVPN route issued by the first network device is not enabled.

Similarly, based on steps S403 and S404, the second network device only starts the high-priority EVPN route issued by the third network device, and does not start the low-priority EVPN route issued by the third network device.

S405, when the third network equipment fails, starting a backup fifth type EVPN route issued by the first network equipment, wherein the backup fifth type EVPN route corresponds to a fifth type EVPN route issued by the third network equipment and including second priority indication information.

In this step, during initialization, the EVPN routes of the fifth type on all the core devices in the first network layer are the same, except that after load sharing, the EVPN of the fifth type that each core device provides traffic forwarding service is different, so when the route issued by the third network device and the route issued by the first network device, the content of the issued route is the same except for the priority indication information. Therefore, when the third network device fails, the second network device may enable the fifth type EVPN route corresponding to the fifth type EVPN route with high priority in the third network device, which is issued by the first network device, that is, backup the fifth type EVPN route, so that the second network device only needs to optimize a part of the fifth type EVPN route, and there is no need to optimize all the fifth type EVPN routes again by the second network device when the main network device fails in the network device scheme of the primary-secondary relationship in the prior art, and further, there is no problem of slow switching speed.

To better understand the Route issuing method provided in this application, an application scenario shown in fig. 5 is taken as an example to illustrate the Route issuing method, where the first network layer is a Spine layer in fig. 5, the second network layer is a Leaf layer in fig. 5, correspondingly, the first network device and the third network device in the first network layer may be a Route Reflector1 and a Route Reflector2 of the Spine layer in fig. 5, and for convenience of description, the Route Reflector1 and the Route Reflector2 may be respectively denoted as RR1 and RR 2. The second network device of the Leaf layer may be a VTEP, on which a Client is disposed, as also shown with reference to fig. 5. The designated domain established at the Spine layer is an RR domain, then RR1 and RR2 are added to the RR domain, and the fifth type EVPN routes on RR1 and RR2 in the RR domain are the same. In order to implement load balancing of the routes, the fifth type EVPN routes where each RR provides traffic forwarding services are different, and based on this, when the RR interacts with the VTEP, the following process may be implemented:

the method comprises the following steps: the RR1 and the RR2 may respectively perform hash calculation by using addresses of all RR devices in the RR domain, that is, the RR1 and the RR2, and then perform load sharing calculation on all fifth-class EVPN routes currently existing in the Spine layer, so as to calculate a target fifth-class EVPN route where the RR1 itself provides traffic forwarding service, and calculate a target fifth-class EVPN route where the RR2 itself provides traffic forwarding service.

For example, the Spine layer includes 100 EVPN routes of the fifth type, which are denoted as route 1 to route 100, and according to the load sharing algorithm, the target EVPN route of the fifth type calculated by RR1 is route 1 to route 50, and the target EVPN route of the fifth type calculated by RR2 is route 51 to route 100.

Step two: the RR1 adds first priority indication information in a target fifth type EVPN route which provides flow forwarding for the RR1, so as to indicate that the target fifth type EVPN route is a high-priority route; similarly, the RR2 adds first priority indication information in the target fifth type EVPN route for providing traffic forwarding by itself, so as to indicate that the target fifth type EVPN route is a high-priority route.

For example, RR1 adds first priority indication information, such as 0xFF, to route 1 to route 50, respectively, and RR2 adds first priority indication information, such as 0xFF, to route 51 to route 100, respectively.

Step three: RR1 adds second priority indication information in all the fifth type EVPN routes except the target fifth type EVPN route which provides the traffic forwarding for the RR1, so as to indicate that the fifth type EVPN route except the target fifth type EVPN route which provides the traffic forwarding for the RR1 is a low-priority route; similarly, the RR2 adds second priority indication information to all the fifth EVPN routes except the target fifth EVPN route providing traffic forwarding, so as to indicate that the fifth EVPN route except the target fifth EVPN route providing traffic forwarding is a low-priority route.

For example, RR1 adds second priority indication information, such as 0x00, to the routes 51 to 100 respectively; similarly, RR2 adds second priority indication information, such as 0x00, to route 1 to route 50 respectively.

Step three: RR1 issues all the fifth EVPN routes after the new adding operation to the Client of the Leaf layer; similarly, the RR2 issues all the EVPN routes of the fifth type after the new addition operation is performed to the Client of the Leaf layer.

For example, RR1 issues route 1 to route 50 to which the first priority indication information is added, and route 51 to route 100 to which the second priority indication information is added to the Client; similarly, the RR2 issues the route 1 to the route 50 to which the second priority indication information is added, and the route 51 to the route 100 to which the first priority indication information is added to the Client.

Step four: after receiving the fifth type EVPN routes issued by RR1 and RR2, the Client analyzes priority indication information from each fifth type EVPN route, and when the priority indication information is the first priority indication information, the Client starts the fifth type EVPN routes and forwards the flow of the Client to the corresponding RR1 or RR2 by using the fifth type EVPN routes. And when the priority indication information is the second priority indication information, not enabling the fifth type of EVPN routing.

For example, the Client analyzes each EVPN route of the fifth type issued by RR1, and may find that priority indication information in routes 1 to 50 is 0xFF, that is, the first priority indication information, then starts the routes 1 to 50 issued by RR1, and then forwards the corresponding traffic to RR1 by using the started route. Then, if the priority indication information in the route 51 to the route 100 is found to be 0x00, the route 51 to the route 100 issued by the RR1 is not enabled. Similarly, the Client analyzes each fifth type EVPN route issued by RR2, and can find that priority indication information in routes 51 to 100 is 0xFF, that is, the first priority indication information, then starts the routes 51 to 100 issued by RR2, and then forwards the traffic to RR2 by using the started route; then, if the priority indication information in route 1 to route 50 is found to be 0x00, route 1 to route 50 issued by RR2 are not enabled. Therefore, the routing sent by each RR can have the routing started by the Client.

Step three: when sensing that the RR2 has a fault, the Client enables a backup fifth type EVPN route issued by RR1, wherein the backup fifth type EVPN route corresponds to the fifth type EVPN route issued by RR2 and including second priority indication information.

For example, when RR2 fails, the Client may perceive that RR2 has failed, and then the route 51 to route 100 with high priority issued by RR2 becomes untrusted, and in order to ensure smooth forwarding of traffic, the Client may enable the route 51 to route 100 issued by RR1, that is, only a part of the routes 51 to route 100 needs to be re-optimized, and 100 routes do not need to be re-optimized, so that the route switching speed is increased, and no additional resource consumption is caused. In addition, after the backup fifth type EVPN route is enabled, the Client may send subsequent traffic to be sent to RR2, and after the backup route in RR1 is enabled, the Client may issue a forwarding table to the forwarding plane of the Client based on the enabled backup routes (route 51 to route 100), so that any one of the enabled routes 51 to route 100 may be used to send and forward the traffic to RR1, thereby ensuring smooth forwarding of the traffic.

Step four: after sensing the RR2 fault, the RR1 performs load sharing calculation on the fifth type EVPN route including the first priority indication information in the RR2, and determines the fifth type EVPN route that the RR1 needs to share, in the scenario shown in fig. 5, the RR1 needs to share all the high-priority fifth type EVPN routes in the RR2, and then adds the first priority indication information in the shared fifth type EVPN route.

For example, when RR1 senses that RR2 has failed, RR1 needs to share the route in RR2 that includes the first priority indication information, that is, the shared route is route 51 to route 100, and then add 0xFF, that is, the first priority indication information, to the route 51 to route 100.

Step five: and the RR1 issues all the fifth type EVPN routes to the Client.

For example, the RR1 issues the route 1 to the route 100 of the first priority indication information, which are all newly added, to the Client.

Step six: and the Client receives the fifth type EVPN route issued by RR 1.

For example, the Client analyzes the route 1 to the route 100 one by one, and finds that the priority indication information in the route 1 to the route 100 is the first priority indication information, but since the Client has started the route 1 to the route 100 issued by the RR1 before, only the routing table about the RR1 recorded by the Client needs to be updated at this time, and the forwarding table does not need to be modified, thereby greatly saving the switching time of the route.

After the RR2 is recovered, or when an RR device is newly added in the RR domain, the route issuing procedure provided in this embodiment, that is, the procedure shown in fig. 2, may be implemented again.

It should be noted that, in practical applications, the Spine layer may include more than 2 RR devices, and the implementation process is similar to that described above, except that when the Client senses that the RR2 is faulty, the Client selects a target RR from the remaining RRs, and then the Client enables the backup EVPN route of the fifth type issued by the target RR, and other operations are similar to those described above, and will not be described in detail here.

Based on the same inventive concept, the application also provides a route issuing device corresponding to the route issuing method implemented by the first network equipment side. The implementation of the route issuing device may refer to the description of the route issuing method by the first network device, and is not discussed here one by one.

Referring to fig. 6, fig. 6 is a routing issuing apparatus provided in an EVPN network, where the routing issuing apparatus is disposed in a first network device of the EVPN network, and the EVPN network further includes a second network device, where the apparatus includes:

a determining module 601, configured to determine, from all fifth types of EVPN routes, a target fifth type of EVPN route where the first network device itself provides a traffic forwarding service, by using a load sharing algorithm;

an information adding module 602, configured to add first priority indication information in the target fifth type EVPN route to indicate that the target fifth type EVPN route is a high-priority route;

the information adding module 602 is further configured to add second priority indication information to a fifth type EVPN route, which is not the target fifth type EVPN route, in all fifth type EVPN routes, so as to indicate that the fifth type EVPN route, which is not the target fifth type EVPN route, is a low-priority route;

the route issuing module 603 is configured to issue all fifth types of EVPN routes after the addition operation is performed to the second network device in the EVPN network, so that the second network device starts the fifth type of EVPN route corresponding to the first priority indication information after receiving the fifth type of EVPN route.

Optionally, the EVPN network further includes a third network device, where the first network device and the third network device are in a specified domain, and all network devices in the specified domain have the same fifth type EVPN route; then

The determining module 601 is further configured to perform load sharing calculation on a fifth type EVPN route, which provides a traffic forwarding service, of the third network device when the third network device fails, and determine the fifth type EVPN route that needs to be shared by the first network device;

the information adding module 602 is further configured to add first priority indication information to the fifth type of EVPN route to be shared, so as to indicate that the fifth type of EVPN route to be shared is a high-priority route;

the route issuing module 603 is further configured to issue all fifth types of EVPN routes after the new addition operation is performed to the second network device in the EVPN network.

Optionally, the first network device is in a designated domain, and all network devices in the designated domain have the same EVPN route of a fifth type; then

The determining module 601 is further configured to, when a network device is newly added in the designated domain, continue to perform the step of determining, by using the load sharing algorithm, a target fifth type EVPN route for the first network device to provide the traffic forwarding service from all fifth type EVPN routes.

Optionally, the first priority indication information in this embodiment is set in the extended community attribute in the EVPN route of the corresponding target type five; and the second priority indication information is set in the extended community attribute in the corresponding fifth type of EVPN routing.

Based on the same inventive concept, the embodiment of the present application further provides a route issuing device corresponding to the route issuing method implemented by the second network device side. The implementation of the route issuing device may refer to the description of the route issuing method by the second network device, and is not discussed here one by one.

Referring to fig. 7, fig. 7 is a routing issuing apparatus provided in a second network device in an EVPN network according to an exemplary embodiment of the present application, where the EVPN network further includes a first network device and a third network device, and the first network device and the third network device have a same fifth type of EVPN routing, and the apparatus includes:

a receiving module 701, configured to receive a fifth type of EVPN routes issued by the first network device and the third network device, respectively;

a parsing module 702, configured to parse the priority indication information from the fifth type EVPN route;

an enabling module 703, configured to enable the fifth type of EVPN routing and forward the traffic of the second network device to the first network device or a third network device by using the fifth type of EVPN routing if the priority indication information is the first priority indication information, where the first priority indication information is used to indicate that the fifth type of EVPN routing is a high-priority routing; if the priority indication information is second priority indication information, not enabling the fifth type of EVPN routing, wherein the second priority indication information is used for indicating that the fifth type of EVPN routing is a low-priority routing;

the enabling module 703 is further configured to enable a backup fifth type EVPN route issued by the first network device when the third network device fails, where the backup fifth type EVPN route corresponds to a fifth type EVPN route issued by the third network device and including the second priority indication information.

Optionally, the priority indication information in this embodiment is set in the extended community attribute in the corresponding EVPN route of the fifth type.

Based on the same inventive concept, embodiments of the present application provide an electronic device, which may be the first network device, the second network device, or the third network device. As shown in fig. 8, the electronic device includes a processor 801 and a machine-readable storage medium 802, where the machine-readable storage medium 802 stores a computer program capable of being executed by the processor 801, and the processor 801 is caused by the computer program to execute the route issuing method provided in the embodiment of the present application.

The computer-readable storage medium may include a RAM (Random Access Memory), a DDR SRAM (Double Data Rate Synchronous Dynamic Random Access Memory), and may also include a NVM (Non-volatile Memory), such as at least one disk Memory. Alternatively, the computer readable storage medium may be at least one memory device located remotely from the processor.

The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.

In addition, a machine-readable storage medium is provided, and stores a computer program, and when the computer program is called and executed by a processor, the computer program causes the processor to execute the route issuing method provided by the embodiment of the present application.

For the embodiments of the electronic device and the machine-readable storage medium, since the contents of the related methods are substantially similar to those of the foregoing embodiments of the methods, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the embodiments of the methods.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The implementation process of the functions and actions of each unit/module in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.

For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, wherein the units/modules described as separate parts may or may not be physically separate, and the parts displayed as units/modules may or may not be physical units/modules, may be located in one place, or may be distributed on a plurality of network units/modules. Some or all of the units/modules can be selected according to actual needs to achieve the purpose of the scheme of the application. One of ordinary skill in the art can understand and implement it without inventive effort.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A route issuing method is applied to a first network device in an Ethernet Virtual Private Network (EVPN) network, wherein the EVPN network also comprises a second network device, and the method comprises the following steps:

2. The method of claim 1, wherein the EVPN network further comprises a third network device, wherein the first network device and the third network device are within a specified domain, and wherein all network devices within the specified domain have the same EVPN routing of a fifth type; the method further comprises:

when the third network equipment fails, performing load sharing calculation on a fifth type EVPN route of the third network equipment providing flow forwarding service, and determining the fifth type EVPN route required to be shared by the first network equipment;

adding first priority indication information in the fifth type of EVPN route needing to be shared to indicate that the fifth type of EVPN route needing to be shared is a high-priority route;

and issuing all the fifth types of EVPN routes subjected to the newly adding operation to second network equipment in the EVPN network.

3. The method of claim 1, wherein the first network device is within a specified domain, and wherein all network devices within the specified domain have the same EVPN routing of a fifth type; the method further comprises:

and when the network equipment is newly added in the specified domain, continuously executing the step of determining the target fifth type EVPN route of the flow forwarding service provided by the first network equipment from all the fifth type EVPN routes by using the load sharing algorithm.

4. The method of claim 1,

the first priority indication information is set in the extended community attribute in the corresponding target fifth type EVPN route;

the second priority indication information is set in the extended community attribute in the corresponding fifth type EVPN routing.

5. A route issuing method is applied to a second network device in an Ethernet Virtual Private Network (EVPN) network, wherein the EVPN network further comprises a first network device and a third network device, and the first network device and the third network device have the same fifth type EVPN route, and the method comprises the following steps:

analyzing priority indication information from the fifth type EVPN route;

6. The method of claim 5,

the priority indication information is set in the extended community attribute in the corresponding fifth type EVPN route.

7. A routing issuing device is characterized in that the routing issuing device is arranged in first network equipment in an Ethernet Virtual Private Network (EVPN) network, the EVPN network also comprises second network equipment, and the device comprises:

8. The apparatus of claim 7, wherein the EVPN network further comprises a third network device, wherein the first network device and the third network device are within a specified domain, and wherein all network devices within the specified domain have the same EVPN routing of a fifth type; then

The determining module is further configured to perform load sharing calculation on a fifth type of EVPN route, which provides traffic forwarding service, of the third network device when the third network device fails, and determine the fifth type of EVPN route, which needs to be shared by the first network device;

the information adding module is further configured to add first priority indication information to the fifth type of EVPN route to be shared to indicate that the fifth type of EVPN route to be shared is a high-priority route;

and the route issuing module is further configured to issue all fifth types of EVPN routes after the new addition operation is performed to the second network device in the EVPN network.

9. The apparatus of claim 7, wherein the first network device is within a specified domain, and wherein all network devices within the specified domain have the same EVPN routing of a fifth type; then

The determining module is further configured to, when a network device is newly added in the designated domain, continue to perform the step of determining a target fifth type EVPN route, which provides the traffic forwarding service, of the first network device from all fifth type EVPN routes by using the load sharing algorithm.

10. A route issuing device is characterized in that the route issuing device is arranged in a second network device in an Ethernet Virtual Private Network (EVPN) network, the EVPN network further comprises a first network device and a third network device, the first network device and the third network device have the same fifth type EVPN route, and the device comprises: