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Method and equipment for avoiding RIP loop circuit in CE dual-homing network

A dual-homing and network technology, applied in the field of communication, can solve the problems that RIP cannot be applied, and loop problems cannot be eliminated.

Inactive Publication Date: 2010-03-17
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0015] The loop problem caused by the mutual introduction between RIP and BGP cannot be eliminated when RIP is used in the CE dual-homing network, so RIP cannot be applied in the CE dual-homing network.

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  • Method and equipment for avoiding RIP loop circuit in CE dual-homing network
  • Method and equipment for avoiding RIP loop circuit in CE dual-homing network
  • Method and equipment for avoiding RIP loop circuit in CE dual-homing network

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Embodiment Construction

[0059] In the prior art, a loop problem occurs when RIP is used in a CE dual-homing network, resulting in the unavailability of RIP. To solve this problem, the present invention provides a method for avoiding RIP loops in a CE dual-homing network. The core The idea is: in a CE dual-homing network, two PEs connected to the same CE belong to the same AS, and the two PEs have the same AS number. Therefore, by carrying the AS number in the routing message, the PE receiving the routing message can identify Whether the routing packet is sent by the PE of the same AS, that is, another PE connected to the CE. If so, the PE can discard the packet to avoid loops; otherwise, the PE learns the routing information in the routing packet. Specifically, on the two PEs connected to the same CE, when RIP is configured to import BGP routes, the AS number of the local router is carried in the corresponding RIP message; when BGP imports RIP route, the PE checks the AS number carried in the RIP mess...

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Abstract

The invention discloses a method for avoiding RIP loop circuit in a CE dual-homing network, comprising the following steps: configuring CE dual-homing PE with addition and analysis functions of an ASnumber, acquiring the AS number carried in RIP message according to previous configuration when RIP route is introduced into BGP, and comparing the AS number with a local AS number; and discarding theRIP message when the AS number is the same with the local AS number, thereby avoiding loop circuit message occurred between the CE and the two PE connected with CE when RIP route and BGP route are mutually introduced in the CE dual-homing network.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and equipment for avoiding RIP loops in a CE dual-homing network. Background technique [0002] In the Internet, an AS (Autonomous System, autonomous system) is a small network unit that has the right to independently decide which routing protocol should be used in the system. This network unit can be a simple network, or a network group controlled by one or more ordinary network administrators. It is a single manageable network unit, such as a university, an enterprise or a company. An autonomous system will assign a globally unique number, this number is called AS number. [0003] The communication of routing information within an autonomous system network uses IGP (Interior Gateway Protocol, Interior Gateway Protocol), and the routing information is shared between various autonomous system networks through BGP (Border Gateway Protocol, Border Gateway Protocol). [0004] R...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L45/18
Inventor 王伟林慧
Owner NEW H3C TECH CO LTD
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