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Method for improving CSNP (complete sequence number protocol data unit) message broadcast efficiency in IS-IS (intermediate system-to-intermediate system intra-domain routing information exchange protocol)

A technology of message broadcasting and routing protocol, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems of large protocol messages, consume network bandwidth, increase network bandwidth load, etc., so as to reduce bandwidth occupation and reduce the number of transmissions. , the effect of improving broadcast efficiency

Inactive Publication Date: 2013-06-26
合肥时代智慧高新投资管理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Method for improving CSNP (complete sequence number protocol data unit) message broadcast efficiency in IS-IS (intermediate system-to-intermediate system intra-domain routing information exchange protocol)
  • Method for improving CSNP (complete sequence number protocol data unit) message broadcast efficiency in IS-IS (intermediate system-to-intermediate system intra-domain routing information exchange protocol)
  • Method for improving CSNP (complete sequence number protocol data unit) message broadcast efficiency in IS-IS (intermediate system-to-intermediate system intra-domain routing information exchange 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, send the CSNP message and clear the variable Time.

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

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Abstract

The invention discloses a method for improving CSNP (complete sequence numbers protocol data unit) message broadcast efficiency in an IS-IS (intermediate system to intermediate system routing protocol). The method includes: when a DIS (designated intermediate system) in a broadcast network is elected out, setting a variable Time for the DIS by itself, initializing to clear; utilizing the variable Time to record a received new LSP (link state protocol data unit) time indicating a network topology variation; when the DIS receives a new LSP1 time indicating the network topology variation at the time X, immediately updating an own LSP database and setting the Time as the current time X at the same time; delaying 10 seconds before transmitting a CSNP message, clearing the Time; and if the DIS does not receive any new LSP message within 10 seconds, transmitting a specific Hello message for maintaining connection relation to all neighbors, wherein the Hello message is used for indicating that the current network topology does not vary. The method for improving the CSNP message broadcast efficiency in the IS-IS has the advantages that transmitting times for the CSNP message can be reduced, bandwidth occupation of the CSNP broadcast message can be lowered, broadcast efficiency can be improved, 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 (Intermediate System-to-Intermediate System intra-domain routing information exchange protocol, 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, it can perform routing management in a large network very well. There are four types of packets that IS-IS needs to process: Hello packets, LSP (Link State Protocol Data Unit, Link State Protocol Data Unit) packets, CSNP (Complete Sequence Number PDU, complete sequence code packet) packets, PSNP (Partial Sequence Number PDU, partial sequence number data packet) message. The Hello message is used to establish an adjacency relationship and elect a DIS (Designated Intermediate System), t...

Claims

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Application Information

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Patent Type & Authority Applications(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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