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Method and device for realizing graceful restart of link state routing protocol

A smooth restart and routing protocol technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as switching router routing oscillations, achieve the effects of suppressing refresh, wide application environment, and improving stability and performance

Inactive Publication Date: 2010-06-16
ZTE CORP
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  • Description
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Problems solved by technology

[0015] In view of this, the main purpose of the present invention is to provide a method and device for implementing smooth restart of a link state routing protocol, which can solve the problem of route oscillation in the application environment where the switching router has some neighbor routers that do not support the GR function

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  • Method and device for realizing graceful restart of link state routing protocol
  • Method and device for realizing graceful restart of link state routing protocol
  • Method and device for realizing graceful restart of link state routing protocol

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Embodiment Construction

[0043] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0044] The main idea of ​​the smooth restart implementation scheme of the link state routing protocol of the present invention is: in order to avoid unnecessary route oscillation, after the GR of the switching router is completed, the link state information of itself is not refreshed immediately, and the forwarding table of itself is still maintained. Instead, according to the LSDB sent by the neighbor (that is, the neighbor router), determine the link state information before GR, so as to determine all the neighbor information, mainly the neighbor ID (ID) before GR (before switchover); at the same time, according to the preset Set the waiting time to judge whether the neighbor relationship between itself and all neighbors before switching is successfully established; only after the above-mentioned neighbor relationsh...

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Abstract

The invention discloses a method for realizing graceful restart of a link state routing protocol, comprising the following steps: after graceful restart (GR) is completed, a switching router determines current self link state information of GR according to link state data base (LSDB) transmitted by a neighbor supporting GR function and obtains all current neighbor information of the GR; the neighbors comprise neighbors supporting GR function and neighbors not supporting GR function; in preset waiting time, the switching router judges the neighbourhoods of all neighbors are successfully established, refreshes self link state information and informs the network; the invention also provides a device for realizing graceful restart of a link state routing protocol; with the device and method of the invention adopted, routing oscillation can be resolved in the application environment where the switching router is in coexistence with a part of neighboring routers not supporting GR function.

Description

technical field [0001] The invention relates to the field of data network communication, in particular to a method and device for realizing smooth restart of a link state routing protocol. Background technique [0002] Usually, for the sake of reliability, the hardware of carrier-class routers generally adopts the mode of active and standby redundant backup, that is, it has two control boards as active and standby. When a router (the router indicated in the present invention refers to a router in a general sense, and a three-layer switch that has run a routing protocol) encounters an unexpected failure and cannot work normally, it will automatically switch between active and standby; the operation of active and standby switching will cause A brief interruption occurs between the router and its neighboring routers, which causes route oscillation, which makes the routes in the entire network unstable and greatly reduces the stability and reliability of the network. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/28
Inventor 陈晶鑫赵科强
Owner ZTE CORP
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