Method and device for preventing routing loop in autonomous system

An autonomous system and routing technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as the inability to provide an effective method for routing loops in the AS, reduce complexity and prevent routing loops. Convenient and simple effects

Inactive Publication Date: 2009-05-06
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy to find that if the above method has a large number of route reflectors in the AS, and the route reflectors are each other's clients, routing loops will still occur according to their transfer rules.
[0005] In summary, the prior art cannot provide a simple and convenient effective method for preventing routing loops in the AS

Method used

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  • Method and device for preventing routing loop in autonomous system
  • Method and device for preventing routing loop in autonomous system
  • Method and device for preventing routing loop in autonomous system

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Embodiment Construction

[0033] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0034] In a method for preventing routing loops in an autonomous system provided by the present invention, an additional attribute of routing information is defined, which is an ordered set of a series of values, where the values ​​refer to the The unique identifier of each network device inside the AS, for example, the router ID (Router IDentity) value of the network device, or other manually configured identifier values ​​can be used as the unique identifier of each network device.

[0035] Based on the method of the present invention, when a network device needs to transmit routing information to its IBGP neighbors, it is judged whether the routing information carries additional attributes, if not, an additional attribute is created, and the unique identifier of the network device itself is added as The first valu...

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Abstract

The invention discloses a method for preventing routing loops in autonomous system comprising: network equipment judges if the received routing information carries additive attributes, traverses additive attributes when judging the router information carries with additive attributes; judges if the additive attribute includes unique identifier of network equipment, if including, then discards the router information; if not including, then execute local processing to the router information; when router information is judged not to carry additive attribute, then directly executes local processing. The invention also discloses network equipment which can effectively prevent routing loop in autonomous system, and largely reduce complexity of network configuration and pressure of supported by network equipment; the invention is conveniently and simply implemented.

Description

technical field [0001] The invention relates to routing information transmission technology in an autonomous system, in particular to a method and equipment for preventing routing loops in an autonomous system. Background technique [0002] Border Gateway Protocol (BGP, Border Gateway Protocol) is a current common inter-domain routing protocol. With the rapid development of IP networks, the network topology is becoming larger and larger. The BGP routing network constructed in practical applications is in an autonomous system (AS, Autonomous System), and usually no longer has one or two BGP routers running BGP. It is composed of multiple network devices, and these network devices may also have a ring connection in the physical topology. A ring connection can easily lead to the following situation, that is, a network device running BGP learns routing information from other ASs, and advertises the learned routing information to other network devices in its own AS; the advertis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/18
Inventor 刘显东
Owner ZTE CORP
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