Method for updating boundary gate protocol recursion router

Abstract

The method comprises: 1) the IP router for running BGP receives the route update message from I-BGP neighbor, and generates a BGP route; 2) according to said BGP route, looking up the route table to make the recursive resolution for the BGP next hopping, and detects if IGP has learnt the BGO route so as to decide if the route synchronization between IGP and BGP has been completed; 3) if yes, then comparing the IGP next hopping obtained through learning with the BGP next hopping after resolution in order to decide if they are consistent; if yes, then directly updating the IP route table, and the route is valid; if not, then according to the user's configuration requirement, making relevant route update.

Description

technical field [0001] The present invention relates to a kind of border gateway protocol recursive route update method, more specifically relate to a kind of IP (Internet Protocol Internet Protocol) router that uses border gateway protocol BGP (Border Gateway Protocol border gateway protocol) to realize BGP recursive route update Methods. Background technique [0002] Routing black hole: There is an unreachable false route in the network, and all traffic trying to reach the destination according to this route will be discarded. It can be seen that in the process of network operation, it is necessary to avoid and prevent the generation of routing black holes. [0003] BGP recursive routing: When the source router advertises a route to the destination router through the BGP protocol, the destination router will first generate a BGP route according to the NLRI (Network Layer Reachability Information) information advertised by the source router. The next hop of this BGP route...

AI Technical Summary

Problems solved by technology

Therefore, the traffic is finally discarded on the R5 router, thus creating a traffic forwarding black hole

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