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A Method of Improving the Broadcasting Efficiency of CSNP Messages in the IS-IS Routing Protocol

A message broadcasting and routing protocol technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems of consuming network bandwidth, increasing network bandwidth load, and large protocol messages, so as to avoid CSNP broadcasting and improve broadcasting efficiency Effect

Inactive Publication Date: 2016-02-10
合肥时代智慧高新投资管理有限公司
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AI Technical Summary

Problems solved by technology

[0006] If there are hundreds or thousands of devices in a broadcast network, the length of a CSNP message will reach several KB, and the frequency of sending it every 10 seconds will consume a considerable part of the network bandwidth.
If the network is larger, the exchanged protocol packets will be larger, which will increase the load on the network bandwidth.

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  • A Method of Improving the Broadcasting Efficiency of CSNP Messages in the IS-IS Routing Protocol
  • A Method of Improving the Broadcasting Efficiency of CSNP Messages in the IS-IS Routing Protocol
  • A Method of Improving the Broadcasting Efficiency of CSNP Messages in the IS-IS Routing Protocol

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Embodiment Construction

[0028] see figure 1 , a method for improving the broadcast efficiency of CSNP messages in the IS-IS routing protocol. After the DIS in the broadcast network is elected, a variable Time is set by itself, and the variable Time is initialized and cleared. The variable Time is used to record the time when a new LSP indicating a network topology change is received.

[0029] figure 2 In , the variable Time changes with time and network topology. When the DIS receives a new LSP1 representing a network topology change at time X, it immediately updates its own LSP database, and sets the variable Time to the current time X at the same time. In the next 10 seconds, the DIS receives 4 new LSP packets, but because the time X has been set for Time, the variable Time is no longer set. After a delay of 10 seconds, the CSNP message is sent and the variable Time is cleared.

[0030] If the DIS does not receive a new LSP packet within 10 seconds, it sends a specific Hello packet to all nei...

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Abstract

The invention discloses a method for improving the broadcasting efficiency of CSNP messages in the IS-IS routing protocol. After the DIS in the broadcasting network is elected, the DIS itself sets a variable Time, which is initialized and cleared to zero; the variable Time is used to record the received representation The new LSP time of the network topology change; when the DIS receives the new LSP1 representing the network topology change at time X, it immediately updates its own LSP database and sets Time to the current time X; after a delay of 10 seconds, it sends the CSNP report message, and clear the Time; if within 10 seconds, the DIS does not receive a new LSP message, it will send a specific Hello message to all neighbors to maintain the connection relationship. The Hello message is used to indicate that the current network topology does not any changes. The method for improving the broadcasting efficiency of the CSNP message in the IS-IS routing protocol of the present invention has the advantages of reducing the number of times of sending the CSNP message, reducing the bandwidth occupation of the CSNP broadcast message, improving the broadcasting efficiency, and the like.

Description

technical field [0001] The invention relates to a method for improving the CSNP message broadcasting efficiency in the IS-IS routing protocol. Background technique [0002] IS-IS (IntermediateSystem-to-IntermediateSystemintra-domainroutinginformationexchangeprotocol, intermediate system to intermediate system intra-domain routing information exchange protocol) routing protocol is not only suitable for the LAN environment, but also more used in the metropolitan area network environment, can be very good Perform routing management in large networks. There are four types of messages that IS-IS needs to process: Hello message, LSP (LinkStateProtocolDataUnit, link state protocol data unit) message, CSNP (CompleteSequenceNumberPDU, complete sequence number packet) message, PSNP (PartialSequenceNumberPDU, partial sequence number data packet) message. The Hello message is used to establish an adjacency relationship and elect a DIS (Designated Intermediate System), the LSP message ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/761H04L12/755H04L12/757H04L45/16
Inventor 王松谢彬彬唐舜
Owner 合肥时代智慧高新投资管理有限公司
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