Drop sensitive prefix (bgp path) attribute modification

摘要

The first autonomous system in system( AS )It is configured with the first switching gateway router forward data and one group of IP address prefix,To the 2nd AS via the 2nd AS problems of the oneth eBGP peer devices of link 1,Packet drop data are still active in the first gateway router and the first eBGP peers in link still " upper " and an eBGP session simultaneously of the first gateway router of output,Solve by( 1 )It receives to fall about the packet of data and is exporting the first gateway router,( 2 )Determine that data service unloading situation exists,Use the received information of institute( 3 )Change path attribute(It is one or more)If at least some IP address prefix group data services unloading situation exist,So that the first gateway router is by those associated IP address prefixes of less forward data,And( 4 )Generating bgp update message includes the path attribute changed(It is multiple)At least one iBGP peer device is communicated in the first AS.