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Message exchange method and device for routers

A message interaction and router technology, applied in data exchange network, digital transmission system, electrical components, etc., can solve problems such as redundant operation and waste of resources

Active Publication Date: 2017-09-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the technical problem to be solved by the present invention is to provide a message exchange method and device between routers, to solve the redundant operation caused by the router not knowing the application that is using the router ID, and avoid waste of resources

Method used

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  • Message exchange method and device for routers
  • Message exchange method and device for routers
  • Message exchange method and device for routers

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The specific format of router ID usage information TLV in the embodiment of the present invention is defined as follows:

[0051] Router ID Usage Information – This optional TLV should appear at most once in the LSP to indicate the usage of the router ID.

[0052] Type code – undetermined

[0053] length – the total length of the content

[0054] content-

[0055] Sub-TLV Type Code – 1 or 2.

[0056] Sub-TLV Length – Sub-TLV content length.

[0057] Sub-TLV content –

[0058]

[0059] Among them, sub-TLV type 1: IPv4 router ID usage information

[0060] This sub-TLV contains IPv4 routing ID usage information, and it should appear at most once in the router ID usage information TLV. In consideration of flexibility and easy expansion, the length of the sub-TLV is not fixed at 1 byte (eight bits).

[0061] Sub-TLV Type 2: IPv6 Router ID Usage Information

[0062] This sub-TLV contains IPv6 routing ID usage information, and it should appear at most once in the ro...

application example 1

[0066] suppose as figure 2 In the network topology, the directly connected nodes are interconnected, and the two-way Metric cost value (10 in the figure) is the same. Now try to generate a Remote-LFA standby route for link S-E, and it can be known that node C is a candidate PQ node according to the algorithm. If the information TLV used by analyzing the router ID of node C finds that the router ID carried by node C does not apply to Remote-LFA, then node S will immediately abandon the standby topology from node S to node C, and will also give up trying to establish a slave topology. A tunnel from node S to node C.

application example 2

[0067] Application Example 2: Assume that image 3 In the network topology, directly connected nodes are interconnected, and the two-way metric value is the same. Now establish a TE tunnel for the S node to the E node. Although the router ID is obtained from the LSP of the E node, if it is found that the router ID carried by the E node does not apply to the TE by analyzing the router ID usage information TLV of the E node, then the S node will immediately give up the establishment of a link from the S node to the E node. The TE tunnel of the node.

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PUM

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Abstract

The invention relates to a message exchange method and device for routers. The method comprises: router ID TLV usage information is added into an exchanged message between routers, wherein the router ID TLV usage information is used for representing information of an application or applications using the router ID of the router sending a message; and one router executes the corresponding operation of the application being using the outer ID of the router sending the message according to the router ID TLV usage information in the message received from another router. Therefore, a problem that the router does not know the application being using the router ID and thus performs the redundant operation can be solved; and thus resource wasting can be avoided.

Description

technical field [0001] This article relates to the technical field of message interaction between routers, in particular to a method and device for message interaction between routers. Background technique [0002] Routers usually need to exchange messages to complete routing. In related technologies, the messages exchanged between routers only include the router ID TLV (type, length, value). Through the router ID TLV, the router receiving the message can know that the message sent The ID of the router and route accordingly. [0003] When multiple applications share the router ID TLV information, the router receiving the message will perform many redundant operations because it does not know the ID of the router sending the message, resulting in waste of resources. Contents of the invention [0004] In view of this, the technical problem to be solved by the present invention is to provide a message exchange method and device between routers to solve redundant operations c...

Claims

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Application Information

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IPC IPC(8): H04L12/751H04L45/02
CPCH04L45/02
Inventor 黄占彬
Owner ZTE CORP
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