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Method and Router for Reducing Link State Packet Flooding

A link state and router technology, applied in the field of communication, can solve the problems of increasing CPU processing load, large LSDB capacity, and inability to achieve LSDB isolation

Active Publication Date: 2016-08-17
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the existing network, it is impossible to isolate the LSDB within the same L1. For example, the LSP sent by RT1 to MTR1 will be forwarded to RT2 through MTR1, and the LSDBs of RT1 and RT2 will be synchronized.
In this way, the LSDB capacity of the routers at the boundary of the aggregation layer and the access layer is larger, which increases the CPU processing burden of the system.

Method used

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  • Method and Router for Reducing Link State Packet Flooding
  • Method and Router for Reducing Link State Packet Flooding
  • Method and Router for Reducing Link State Packet Flooding

Examples

Experimental program
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Effect test

Embodiment 1

[0042]In order to prevent RT2 from receiving the LSP sent by RT1 to MTR, configure an interface routing filtering policy on the interface between MTR and RT2, specifying that when MTR receives an LSP from RT1, it will not send it to RT2, that is, in MTR , the interface filtering routing policy on the interface with RT2 is set with the system ID of RT1, as long as the MTR checks on the interface with RT2 that the system ID of the source router that generated the LSP is RT1, it will not send the LSP to RT2 , so as to realize the LSDB isolation of RT1 and RT2.

Embodiment 2

[0044] To prevent RT2 from receiving LSPs from other RT devices, configure a global routing filtering policy on the interface between MTR and RT2, specifying that MTR only sends the LSPs generated by itself to RT2, that is, only MTR communicates with RT2. Check out the system ID of the source router that generated the LSP on the interface between the routers, and then send it to RT2. In this way, the LSPs sent by RT1 or other RT devices to MTR will not be sent to RT2, so that RT2 and other RT devices can completely communicate with each other. isolation. According to the above description, configure the global routing filtering policy on the interface between the specified MTR and RT2; similarly, if you want RT3 not to receive LSPs from other RT devices, then configure the global routing filtering policy on the interface between the designated MTR and RT3; By analogy, multiple interfaces can be specified on the MTR with a global routing filtering policy, and the interface with...

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Abstract

The present invention provides a method for reducing link state packet LSP flooding. The method comprises: setting a route filtering policy on a router interface in advance, and the route filtering policy is used to filter LSP; the router interface according to the route filtering policy Receive or send LSP packets. The invention also provides a router. Adopting the present invention can reduce the synchronization of the link state database.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and a router for reducing flooding of link state data packets. Background technique [0002] IS-IS (Intermediate System-to-Intermediate System) routing protocol is a link-state-based interior gateway protocol developed by the IETF. Routers using the IS-IS protocol transmit routing information to each other through Link State Packets (LSPs). This process is called flooding. Each router running the IS-IS protocol always describes the connection status of the local network, such as available interface information and reachable neighbor information, with LSP, and broadcasts it to the entire autonomous system. In this way, each router has received the LSPs generated by all routers in the autonomous system, and the collection of all LSPs constitutes the link state database (LSDB). Since each LSP is a description of the network topology around a router, the entire LSDB ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/813H04L45/16H04L47/20H04L45/02
CPCH04L45/32H04L45/03H04L45/02
Inventor 林长望
Owner NEW H3C TECH CO LTD
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