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Method, device and system for synchronizing link state notification information

A link status notification and information synchronization technology, applied in the field of communication, can solve problems such as bandwidth resource consumption, neighbor link establishment time extension, etc., and achieve the effect of speeding up and reducing waste

Active Publication Date: 2020-01-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Knownly, in the process of establishing a neighbor relationship on the link 2 or 3, it is necessary to send all the link state advertisement LSA in the LSDB and the summary description information of the local database LSA. It can be seen that this will inevitably cause the neighbor to establish a link The time is extended, and due to the existence of a large number of OSPF packet transmissions, precious bandwidth resources are consumed

Method used

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  • Method, device and system for synchronizing link state notification information
  • Method, device and system for synchronizing link state notification information
  • Method, device and system for synchronizing link state notification information

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Embodiment Construction

[0038] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific examples, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention .

[0039] refer to figure 2 As shown, a method for synchronizing link state notification information provided by an embodiment of the present invention includes:

[0040] S10. For neighbors with multiple links, create a public external link state advertisement LSA database summary list, a public external LSA request list, and a public external LSA retransmission list when establishing a link for the first time;

[0041] S20. In the subsequent link establishment process, determine whether to perform synchronization of external LSA messages according to the public external link state announcement LSA database summary list, public external LSA request l...

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Abstract

The invention discloses a method, device and system for realizing synchronization of link state notification information. The method includes: for neighbors with multiple links, creating a public external link state advertisement LSA database summary list, a public external LSA request list, and a public external LSA retransmission list when establishing a link for the first time; , according to the public external link state notification LSA database summary list, the public external LSA request list and the public external LSA retransmission list to determine whether to perform synchronization of external LSA packets. The present invention creates a public external list when the chain is established for the first time, and cooperates with the public external list in the subsequent chain establishment process, so that when the database has been synchronized, no additional OSPF message is sent to repeatedly perform database synchronization. steps to speed up database synchronization and reduce waste of bandwidth resources.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, device and system for synchronizing link state notification information. Background technique [0002] There are two main types of dynamic routing protocols, one is the distance vector routing algorithm, and the other is the link state routing algorithm. Distance vector routing algorithms include Routing Information Protocol (RIP for short), Border Gateway Protocol (Border Gateway Protocol, BGP for short); link state routing algorithms include Open Shortest Path First (Open Shortest Path First, OSPF for short), Intermediate System-to-Intermediate System (ISIS for short). [0003] In the distance vector routing algorithm, each router maintains a routing table (that is, a vector), which is indexed to each router in the network, and the table lists the best route from the currently known router to each destination router. distance, and the route used. Rou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/755H04L12/771H04L45/60
Inventor 何建军
Owner ZTE CORP