Method and device for preventing route flapping in an intermediate-intermediate routing protocol

A routing protocol and routing technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as IS-IS routing oscillation

Active Publication Date: 2017-03-15
NEW H3C TECH CO LTD
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Problems solved by technology

[0008] In view of this, the present invention provides a method and device for preventing route oscillation in an intermediate-intermediate routing protocol, which can solve the problem of IS-IS route oscillation without adjusting the priority of different protocol routes, and is flexible in use and does not affect routing study

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  • Method and device for preventing route flapping in an intermediate-intermediate routing protocol
  • Method and device for preventing route flapping in an intermediate-intermediate routing protocol
  • Method and device for preventing route flapping in an intermediate-intermediate routing protocol

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[0035]Compared with the prior art, the present invention carries the generator information of the LSP in the LSP prefix issued by the router, and uses the generator information to determine whether routing calculation is required. In this way, on the Level 12 system, the route flapping problem caused by the loopback of the imported route through another Level area is avoided.

[0036] The embodiment of the present invention provides a method for preventing route flapping in an intermediate-intermediate routing protocol, which is applied to a router.

[0037] see figure 2 , the method includes:

[0038] 201. The local router receives a first LSP packet sent by the peer router, where the first LSP packet carries a first routing prefix and information about the original generator of the first routing prefix.

[0039] 202. The local router parses out the first routing prefix carried in the first LSP message and the original generator information of the first routing prefix, and...

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Abstract

The invention provides a method and device for preventing route oscillation in an intermediate-intermediate routing protocol. The method includes: the local router receives the first LSP message sent by the peer router, and the first LSP message carries the first routing prefix and the original generator information of the first routing prefix. The local router parses out the first routing prefix carried by the first LSP message and the original generator information of the first routing prefix, and judges whether the first routing prefix is ​​generated by the local router according to the original generator information of the first routing prefix. If the first route prefix is ​​generated by the local router, the IS‑IS route calculation for the first route prefix is ​​no longer performed. If the first route prefix is ​​not generated for the local router, perform IS‑IS route calculation for the first route prefix. It can solve the problem of IS‑IS route oscillation without adjusting the priority of different protocol routes, and it is flexible to use and does not affect route learning.

Description

technical field [0001] The invention relates to the technical field of intermediate-intermediate routing protocols, in particular to a method and device for preventing route oscillation in an intermediate-intermediate routing protocol. Background technique [0002] IS-IS (Intermediate System-to-Intermediate System intra-domain routinginformation exchange protocol, intermediate-intermediate routing protocol), belongs to the interior gateway protocol, used in the autonomous system. IS-IS is a link state protocol that uses the Shortest Path First (SPF) algorithm for route calculation. IS (Intermediate System): The intermediate system is the basic unit for generating routes and disseminating routing information in the IS-IS protocol. It is equivalent to a router in TCP / IP, and is referred to as a router hereinafter. LSP (Link State Protocol Data Unit or Link State Packet): link state protocol data unit or link state packet. In IS-IS, each router generates an LSP, which contain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/703H04L12/741H04L45/28H04L45/74
Inventor 林长望
Owner NEW H3C TECH CO LTD
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