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imapct of auto summary on redistribution & network command in BGP

Posted by murtazaali123 , 07 October 2011 · 2,839 views

Can some1 plz explain it in detail. I went through CCIE exam cert guide,  but could get it much.





rameshindia003
Mar 24 2013 02:54 PM
The Impact of Auto-Summary on Redistributed Routes and the network Command:

As it does with IGPs, the BGP auto-summary command causes a classful summary route to be created if any component subnet of that summary exists. However, unlike IGPs, the BGP autosummary router subcommand causes BGP to summarize only those routes injected due to redistribution on that router. BGP auto-summary does not look for classful network boundaries in the topology, and it does not look at routes already in the BGP table. It simply looks for routes injected into the BGP due to the redistribute and network commands on that same router.

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