From: John (jgarrison1@austin.rr.com)
Date: Thu Sep 27 2007 - 20:34:52 ART
I'm having a hard time understanding advertise-map.I have a hub and spoke BGP
setup. R1, R2, and R3 are the spokes R5 is the hub. R1, R2, R3 are
advertising 150.1.x.x/24(x represents the router number). On R5 I aggregate
the address to aggregate-address 150.1.0.0/21 with as-set, summary-only and
advertise-map added on. The part I'm not getting is for the spokes to recieve
the aggregate I have to include the 150.1.x.0 in the prefix-list that the
route -map is using. Does BGP compare the advertise-map to incoming
advertisements and then sends advertisements to all matches. Does BGP then
strip off the as-set and advertise the aggregate route? Because if it doesn't
strip of the as-set than the as-set will contain the originating AS and
therefore break the loop avoidance rule?
This archive was generated by hypermail 2.1.4 : Sat Oct 06 2007 - 12:01:16 ART