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A border gateway protocol smooth restart method and routing equipment

A border gateway protocol and smooth restart technology, which is applied in the field of network communication transmission, can solve problems such as slow route convergence, unexpected disconnection of TCP connections, bandwidth occupation, etc., and achieve the effect of accelerating route convergence and reducing bandwidth

Active Publication Date: 2017-08-11
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In view of this, the present invention proposes a border gateway protocol smooth restart method and routing equipment, which effectively solves the problem that some equipment TCP does not support NSR or the TCP connection is accidentally disconnected in the prior art when switching occurs, and BGP NSR mode cannot be used for switching. problems, as well as the bandwidth occupation caused by sending a large number of unnecessary routes in the BGP GR switching mode, and the problems of slow route convergence

Method used

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  • A border gateway protocol smooth restart method and routing equipment
  • A border gateway protocol smooth restart method and routing equipment
  • A border gateway protocol smooth restart method and routing equipment

Examples

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Embodiment 1

[0066] by figure 1 The schematic diagram of the routing network in the example is used to illustrate the technical solution of the present invention, figure 1 In , the local routing information on routing device A is denoted as a, the local routing information on routing device B is denoted as b, and the local routing information on routing device C is denoted as c. Routing device A establishes a neighbor relationship with routing device B, and routing device B establishes a neighbor relationship with routing device C. After the neighbor relationship is established, each routing device sends local routing information to its neighbor router respectively, that is, routing device A sends local routing information a to routing device B, routing device C sends local routing information c to routing device B, and routing device B sends routing information b and c to routing device A, and sends routing information b and a to routing device C. Afterwards, routing information a, b, a...

Embodiment 2

[0093] Method Embodiment 1 The technical solution of the present invention is described by taking the local routing information of routing devices A, B, and C during the disconnection of the TCP connection as an example to illustrate the technical solution of the present invention. This embodiment still adopts the networking structure and parameter settings in Embodiment 1. Assuming that the local routing information a of routing device A is updated to a' during the disconnection of the TCP connection, image 3 The flowchart of the present embodiment includes the following steps:

[0094] Steps 301 to 307 are the same as steps 201 to 207 and will not be repeated here.

[0095] Step 308: The TCP connection returns to normal, and the neighbor routing device calculates the summary value of routing information corresponding to routing device B again.

[0096] In this step, after the TCP connection returns to normal, the neighbor routing device calculates the routing information s...

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Abstract

The invention discloses a border gateway protocol smooth restart method. The method is applied to a first routing device. The first routing device enables BGP uninterrupted routing and backs up its own BGP routing information; when switching occurs, if the TCP connection is abnormally disconnected On, the first routing device switches to GR Restarter, and calculates the routing information summary value corresponding to the neighbor routing device during the disconnection of the TCP connection; if the routing information changes during the disconnection of the TCP connection, the updated BGP route will be used after the TCP connection is restored The information recalculates the routing information summary value corresponding to the neighbor routing device. If the information summary value of the above two calculations is not equal, the first routing device sends the routing information after the TCP connection is restored to the neighbor routing device to update itself If the recorded routing information is equal, a switching end notification message is sent to the neighbor routing device.

Description

technical field [0001] The invention relates to a network communication transmission technology, in particular to a border gateway protocol smooth restart method and routing equipment. Background technique [0002] Border Gateway Protocol (BGP) Graceful Restart (GR) is a mechanism to ensure uninterrupted forwarding services during active-standby switchover or BGP protocol restart. GR has two roles: [0003] Graceful restart device GR Restarter: A device that has the GR capability after an active / standby switchover or protocol restart occurs. [0004] Graceful restart auxiliary device GR Helper: a device that has a neighbor relationship with the GR Restarter and assists in completing the GR process. GR Helper also has GR ability. [0005] The device can serve as both a GR Restarter and a GR Helper. The role of a device is determined by its role in the BGP GR process. [0006] The working process of BGP GR is as follows: [0007] (1) GR Restarter and GR Helper exchange G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/703H04L12/707H04L45/28H04L45/24
Inventor 樊超王伟王海
Owner NEW H3C TECH CO LTD