WO2017036164A1

WO2017036164A1 - Traffic forwarding control method and system

Info

Publication number: WO2017036164A1
Application number: PCT/CN2016/081440
Authority: WO
Inventors: 周广腾
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-06
Filing date: 2016-05-09
Publication date: 2017-03-09
Also published as: CN106506358A

Abstract

Disclosed are a traffic forwarding control method and system. A route reflector (RR) acquires a first route and a second route. The RR only informs a first provider edge (PE) specified by the first route of the first route, and only informs a second PE specified by the second route of the second route, the first route and the second route being used for establishing a traffic forwarding route channel between a first customer edge (CE) and a second CE, the first CE being a first route neighbor specified on the first PE, and the second CE being a second route neighbor specified on the second PE.

Description

Traffic forwarding control method and system

Technical field

This application relates to, but is not limited to, the field of communications.

Background technique

The Border Gateway Protocol (BGP) defined in RFC4271 is the basic method of route advertisement. Figure 1 is a schematic diagram of the traffic forwarding direction in the related art. As shown in Figure 1, the traffic in Figure 1 is from the user edge device (Customer Edge). , referred to as CE) 2 forwarded to CE1, this relatively complex networking, the practice of the relevant technology is to require CE1/Edge Router (Provide Edge, PE) 1 / Route Reflector (RR) / The configurations of the devices such as the PE2/CE2 are modified to ensure that routes are routed to the traffic forwarding channel from CE2 to CE1. However, this configuration is not only complicated, but may affect the original route advertisement, which affects other device traffic. Forwarding.

For the related technologies, the traffic forwarding configuration process between CE devices causes the traffic forwarding efficiency of other devices in the network to be reduced. Currently, no effective solution has been proposed.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

This document provides a method and system for controlling traffic forwarding to solve the problem of traffic forwarding configuration between CE devices in related technologies, resulting in lower traffic forwarding efficiency of other devices in the network.

According to an aspect of the present invention, a method for controlling traffic forwarding is provided, including: a route reflector RR acquiring a first route and a second route; and the RR notifying the first edge router PE specified by the first route to the first Route, and advertise the second route only to the second edge router PE specified by the second route; wherein the first route and the second route are used to establish traffic forwarding between the first edge user equipment CE and the second edge user equipment CE Routing channel; the first CE is on the first PE The first routing neighbor is specified, and the second CE is the designated second routing neighbor on the second PE.

In the embodiment of the present invention, the first route and the second route are routes that are sent by the routing controller to the RR or locally configured in the RR.

In the embodiment of the present invention, the first route specifies the next hop of the first PE, and the second route specifies the next hop of the RR.

In the embodiment of the present invention, the next hop of the first PE specified by the first route is a valid interface address of the RR, and the next hop of the RR specified by the second route is a valid interface address of the second PE.

In the embodiment of the present invention, the first route is a virtual private network version 4 VPNV4 route, and the second route is an Internet Protocol version 4-virtual private network route forwarding instance IPV4-VRF route.

According to another aspect of the present invention, a traffic forwarding control system is provided, including: a route reflector RR, a first edge user equipment CE, a second edge user equipment CE, a first edge router PE, and a second edge. The router PE; wherein the first PE is an edge router specified by the first route; the second PE is an edge router specified by the second route; the first CE is the designated first route neighbor on the first PE, and the second CE is the second Specifying a second routing neighbor on the PE; the RR is configured to: obtain the first route and the second route, and advertise only the first route to the first PE, and only the second route to the second PE; wherein, the first route and the first route The two routes are used to establish a traffic forwarding routing channel between the first CE and the second CE.

In the embodiment of the present invention, the first route and the second route are routes configured locally in the RR.

In the embodiment of the present invention, the system further includes: a routing controller;

The routing controller is configured to send the first route and the second route to the RR.

According to another aspect of an embodiment of the present invention, a computer readable storage medium storing computer executable instructions for performing the method of any of the above is provided.

In the embodiment of the present invention, the route reflector RR is used to obtain the first route and the second route, and the first route and the second route are respectively advertised to the first edge router and the second edge router respectively, thereby opening the first CE backup and The traffic between the second CEs is forwarded to the routing channel without modifying the configuration of the first CE, the second CE, the first edge router, and the second edge router, so that the forwarding of traffic of other devices is not affected, and the solution is solved. The traffic forwarding configuration process between CE devices reduces the traffic forwarding efficiency of other devices in the network and improves the speed of establishing traffic forwarding routing channels between CEs.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic diagram of a traffic forwarding direction in the related art;

2 is a flowchart of a method for controlling traffic forwarding according to an embodiment of the present invention;

3 is a structural block diagram 1 of a control system for traffic forwarding according to an embodiment of the present invention;

4 is a structural block diagram 2 of a control system for traffic forwarding according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a method of controlling traffic forwarding according to an alternative embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be hereinafter described with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present specification and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order.

In this embodiment, a method for controlling traffic forwarding is provided. FIG. 2 is a flowchart of a method for controlling traffic forwarding according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, the route reflector RR acquires the first route and the second route.

Step S204, the RR advertises only the first route to the first edge router PE specified by the first route, and advertises the second route only to the second edge router PE specified by the second route, where the first route and the second route are used. Establishing a traffic forwarding routing channel between the first edge user equipment CE and the second edge user equipment CE; the first CE is the designated first routing neighbor on the first PE, and the second CE is the designated second routing on the second PE neighbor.

Through the above steps, the route reflector RR is used to obtain the first route and the second route, and the first route and the second route are respectively advertised only to the first edge router and the second edge router respectively, thereby opening the first CE backup and the second route. The traffic between the CEs is forwarded to the routing channel without modifying the configuration of the first CE, the second CE, the first edge router, the second edge router, etc., and thus does not affect the original route advertisement, and thus does not affect. The forwarding of traffic to other devices solves the problem of traffic forwarding configuration between CEs, which reduces the traffic forwarding efficiency of other devices in the network, reduces the complexity of configuration, and improves the relationship between the first CE and the second CE. The rate at which traffic is forwarded to the routing channel.

In the embodiment of the present invention, the first route and the second route may be routes that are sent by the routing controller to the RR or locally configured in the RR.

The routing controller may be another centralized management device, or may be implemented by an operation command, an operation and maintenance (OAM) command, or a command sent by a gateway interface. The RR or the route is directly configured on the RR, so that the control of the traffic forwarding is managed by one device, which makes the operation simpler. At the same time, the route is configured on the RR compared to the configuration of each device in the related technology. Less affected.

In the embodiment of the present invention, the first route may specify a next hop of the first PE, and the second route may specify a next hop of the RR. In an optional embodiment, the next hop of the first PE specified by the first route is a valid interface address of the RR, and the next hop of the RR specified by the second route is a valid interface address of the second PE. The next hop is specified, so that the destination address of the traffic forwarding can be obtained smoothly during the traffic forwarding process, thereby speeding up the traffic forwarding. For example, the next hop of the first PE specified by the first route is a valid interface address of the RR, and the next hop of the RR specified by the second route is a valid interface address of the second PE, and the first CE forwards the traffic. The second CE can be quickly obtained after being forwarded by the first PE, the RR, and the second PE device. Arrived at the second CE.

In an optional embodiment of the present invention, the first route may be a virtual private network version 4 VPNV4 route, and the second route may be an Internet Protocol version 4-virtual private network route forwarding instance IPV4-VRF route.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present application, which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM). The method includes a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present invention.

In the embodiment, a flow forwarding control system is also provided, which is used to implement the foregoing embodiments and implementation manners, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 3 is a structural block diagram of a control system for traffic forwarding according to an embodiment of the present invention. As shown in FIG. 3, the system includes: a route reflector RR32, a first edge user equipment CE34, and a second edge user equipment CE36. Edge router PE38 and second edge router PE310.

The first PE 38 is the edge router designated by the first route; the second PE 310 is the edge router designated by the second route; the first CE 34 is the designated first route neighbor on the first PE 38, and the second CE 36 is the designated first on the second PE 310. Two routing neighbors;

The RR32 is configured to: obtain the first route and the second route, and advertise only the first route to the first PE 38, and advertise the second route only to the second PE 310. The first route and the second route are used to establish the first CE34 and The traffic between the second CE 36 forwards the routing channel.

The first route and the second route are obtained by using the route reflector RR32, and the first route and the second route are respectively advertised to the first PE 38 and the second PE 310 respectively, thereby opening a gap between the first CE 34 and the second CE 36. Traffic forwarding routing channel without modifying the first CE34, The configuration of the CE36, the first PE38, and the second PE310 does not affect the original route advertisement, and thus does not affect the forwarding of traffic of other devices. This solves the traffic forwarding configuration process between CE devices. The problem of reduced traffic forwarding efficiency of other devices in the network reduces the complexity of the configuration and improves the speed of establishing the traffic forwarding routing channel between CEs.

In the embodiment of the present invention, the first route and the second route may be routes configured locally in the RR.

4 is a structural block diagram 2 of a control system for traffic forwarding according to an embodiment of the present invention. As shown in FIG. 4, the system further includes:

The routing controller 42 is configured to deliver the first route and the second route to the RR32.

The routing controller 42 may be another centralized management device, or may be implemented by the RR32 configuring the OAM command or the gateway interface, and the routing controller 42 sends a route to the RR32 to control the traffic forwarding through a device. The operation is relatively simple, and the configuration of the route on the RR32 has less impact on the network than the configuration of modifying each device in the related art.

In the embodiment of the present invention, the first route may specify the next hop of the first PE 38, and the second route may specify the next hop of the RR32. In an optional embodiment, the next hop of the first PE 38 specified by the first route is a valid interface address of the RR32, and the next hop of the RR32 specified by the second route is a valid interface address of the second PE 310. The next hop is specified, so that the destination address of the traffic forwarding can be obtained smoothly during the traffic forwarding process, thereby speeding up the traffic forwarding. For example, the next hop of the first PE 38 specified by the first route is a valid interface address of the RR32, and the next hop of the RR32 specified by the second route is a valid interface address of the second PE 310, and the first CE 34 forwards the traffic. The second CE 36 can be quickly obtained after being forwarded by the first PE 38, the RR 32, and the second PE 310 to reach the second CE 36.

The above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the above modules are all located in the same processor; or, the above modules are respectively Located in multiple processors.

For a better understanding of the present application, the present application is further explained below in conjunction with alternative embodiments.

An alternative embodiment of the present invention provides a method for controlling traffic forwarding. The method uses a routing controller to deliver a route, and the route is specified to be sent to a neighboring PEER of the BGP; the routes are respectively forwarded to the neighboring PEER by the RR device. PE1/PE2 advertises that the traffic forwarding channel of CE2 (corresponding to the first CE in the foregoing embodiment) to CE1 (corresponding to the second CE in the foregoing embodiment) is opened;

Configure a route on the device RR (equivalent to the RR in the above-mentioned embodiment). The route is characterized in that: when advertising on the RR device, the next hop is specified; when advertising on the RR device, which PEER is routed to the RRER The transmission is specified, not in accordance with the provisions of ordinary BGP route advertisements;

As shown in FIG. 1, the VPNV4 route is advertised to the PE2 (corresponding to the first PE in the foregoing embodiment), and the IPV4-VRF route is advertised to the PE1 (equivalent to the second PE in the foregoing embodiment), and the traffic is forwarded by CE2 to CE1. Routing channels, which in turn ensure traffic from CE2 to CE1.

Here, the routing controller may be another centralized management device, or may be implemented by the device RR configuring an OAM command or a gateway interface. This solution has the advantages of centralized management on one device, convenient operation, and small impact on configuration of the network.

In an optional embodiment, FIG. 5 is a schematic diagram of a method for controlling traffic forwarding according to an alternative embodiment of the present invention. As shown in FIG. 5, a route is sent and sent on the device RR, and is respectively transmitted to other devices to open CE2. (corresponding to the first CE in the above embodiment) to CE1 (corresponding to the second CE in the above embodiment) to forward the routing channel of the traffic. Methods include:

Step 1, the device RR (corresponding to the RR in the above embodiment) and the PE2 (corresponding to the first PE in the above embodiment) configure the neighbors of the VPNV4.

Step 2: The device RR and PE1 (corresponding to the second PE in the foregoing embodiment) configure a VRF neighbor.

In step 3, the device RR is configured as a route reflector.

Step 4: A route is sent by the routing controller or a route is configured on the device RR. The route is characterized by: a VPNV4 route; the next hop is specified, which is a valid interface address of the RR; The advertised to the specified VPNV4 neighbor, that is, the route is advertised only to the specified VPNV4 neighbor on PE2.

Step 5: A route is configured by the routing controller or configured on the device RR. The route is characterized by: 1) an IPV4VRF route; the next hop is specified, which is a valid interface address of PE1; VRF neighbor advertisement, that is, the route is advertised only to the specified IPV4VRF neighbor on PE1.

After the route advertisement is completed in Step 4 and Step 5, the traffic forwarding channel from CE2 to CE1 is cleared.

The optional embodiment of the present invention is easy to manage, relatively simple to operate, and reduces the impact of configuration changes on the network.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1. The route reflector RR acquires the first route and the second route.

S2, the RR advertises the first route to the first edge router PE specified by the first route, and advertises the second route to the second edge router PE specified by the second route, where the first route and the second route are used to establish the first edge. a traffic forwarding route between the user equipment CE and the second edge user equipment CE; the first CE is the designated first routing neighbor on the first PE, and the second CE is the designated second routing neighbor on the second PE;

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

For example, the examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the above-described modules or steps of the embodiments of the present invention can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed over a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or They are separately fabricated into integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.

The above is only the embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Claims

A method for controlling traffic forwarding includes:

The route reflector RR acquires the first route and the second route.

The RR advertises the first route only to the first edge router PE specified by the first route, and advertises the second route only to the second edge router PE specified by the second route, where the The first route and the second route are used to establish a traffic forwarding routing channel between the first edge user equipment CE and the second edge user equipment CE; the first CE is a designated first route on the first PE The second CE is a designated second routing neighbor on the second PE.
The method according to claim 1, wherein the first route and the second route are routes that are sent by the routing controller to the RR or locally configured in the RR.
The method of claim 1 wherein the first route specifies a next hop of the first PE and the second route specifies a next hop of the RR.
The method according to claim 2, wherein the next hop of the first PE specified by the first route is a valid interface address of the RR, and the next route of the RR specified by the second route Jumps to a valid interface address of the second PE.
The method according to any one of claims 1 to 4, wherein the first route is a virtual private network version 4 VPNV4 route, and the second route is an Internet Protocol version 4 - virtual private network route forwarding instance IPV4-VRF routing.
A traffic forwarding control system includes: a route reflector RR, a first edge user equipment CE, a second edge user equipment CE, a first edge router PE, and a second edge router PE; wherein the first PE is the first a route-designated edge router; the second PE is an edge router specified by the second route; the first CE is a designated first route neighbor on the first PE, and the second CE is the second Specify the second routing neighbor on the PE;

The RR is configured to: obtain the first route and the second route, advertise only the first route to the first PE, and advertise the second route only to the second PE; where the first The route and the second route are used to establish a traffic forwarding routing channel between the first CE and the second CE.
The system of claim 6 wherein said first route and said second route are A route configured locally on the RR.
The system of claim 6 further comprising: a routing controller;

The routing controller is configured to deliver the first route and the second route to the RR.
The system of claim 6 wherein the first route specifies a next hop of the first PE and the second route specifies a next hop of the RR.
The system according to claim 9, wherein the next hop of the first PE specified by the first route is a valid interface address of the RR, and the next route of the RR specified by the second route Jumps to a valid interface address of the second PE.
The system according to any one of claims 6 to 10, wherein the first route is a virtual private network version 4 VPNV4 route, and the second route is an Internet Protocol version 4 - virtual private network route forwarding instance IPV4-VRF routing.