Method, system and router realizing elegant restart of route information protocol

Abstract

The embodiment of the invention discloses a method that a routing information protocol realizes graceful restart. The method comprises that: a router discovers a neighbor router which is connected with the router, and sends a restart notice message to the neighbor router; routing information is received by the neighbor router; after receiving a routing updating completion notice message from the neighbor router, the router updates a forwarding table according to the routing information. The embodiment of the invention discloses the method that the routing information protocol realizes the graceful restart. The method comprises: the restart notice message from a restart router is received, the routing information is sent to the restart router, and the routing updating completion notice message is sent to the restart router after all the routing information is sent out. The embodiment also discloses two routers. Applying the invention, routing updating can be accurately carried out in time, and the interference of the restart router to the network is reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a router for realizing a graceful restart (GR, Gracefull Restart) of a Routing Information Protocol (RIP, Routing Information Protocol). Background technique [0002] Router restart refers to the process of restarting and returning to the normal working state when the router fails to work normally. Router restart includes re-learning routes and re-updating the routing table according to the routing protocol. Many routing protocols support the router GR mechanism with high reliability. Specifically, when a router is scheduled to restart or unexpectedly restarts, the routing protocol supports the restarted router (hereinafter referred to as the restart router) to communicate with the neighbor router (hereinafter referred to as the helper router) that provides routing information. router) for routing synchronization, that is, the helping router sends routing information to the...

AI Technical Summary

Problems solved by technology

[0010] Moreover, because RIP restarts the trigger update of the router within the restart time is suppressed, that is, before the routing table is synchronized, it does not send any routing updates, which may cause the RIP neighbor routers connected to it to fail to update the route for a long time due to the restart of the router. And delete the route learned from the RIP restart router

[0011] Through the above analysis, it can be seen that the current method of implementing GR cannot update routes in a timely and accurate manner, which will cause interference to the network when restarting the router.

Images