If I understand correctly, the cost-community is only considered very late in the decision process (among others after as-path, med and e-bgp/i-bgp): http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009 4431.shtml
All these should be equal before the cost-community kicks in.. /Eduard > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Manu Chao > Sent: woensdag 1 augustus 2007 12:38 > To: [EMAIL PROTECTED] > Cc: [email protected] > Subject: Re: [c-nsp] Late night BGP puzzler > > eBGP prefer to iBGP > > On 8/1/07, Peter Kranz <[EMAIL PROTECTED]> wrote: > > I can't for the life of me figure out why this won't select > path #2 as > > the best path.. can someone unravel what I'm missing.. My > goal is to > > get it to resolve the equal length AS path dispute using > the Cost community. > > > > Path #1 is from a directly connected upsteam provider, no > OSPF Path #2 > > is from a directly connected peer router, OSPF cost 10 > > > > gsr-365-backup#sho ip bgp 6.14.0.0/15 > > BGP routing table entry for 6.14.0.0/15, version 19026850 > > Paths: (2 available, best #1, table Default-IP-Routing-Table) > > Advertised to update-groups: > > 10 > > 2914 701 668 > > 128.241.219.33 from 128.241.219.33 (129.250.0.39) > > Origin IGP, metric 11, localpref 10, valid, external, best > > Community: 2914:420 2914:2000 2914:3000 32354:300 > > Extended Community: Cost:igp:1:10 > > 174 701 668 > > 204.11.106.1 (metric 11) from 204.11.106.1 (204.11.106.1) > > Origin IGP, metric 0, localpref 10, valid, internal > > Community: 174:21000 174:22013 32354:300 > > Extended Community: Cost:igp:1:8 > > > > gsr-365-backup#sho ip route 128.241.219.33 Routing entry for > > 128.241.219.32/30 > > Known via "connected", distance 0, metric 0 (connected, > via interface) > > Redistributing via bgp 32354 > > Advertised by bgp 32354 route-map point-to-point > > Routing Descriptor Blocks: > > * directly connected, via GigabitEthernet4/16 > > Route metric is 0, traffic share count is 1 > > > > gsr-365-backup#sho ip route 204.11.106.1 Routing entry for > > 204.11.106.1/32 > > Known via "ospf 1", distance 110, metric 11, type intra area > > Last update from 204.11.106.41 on GigabitEthernet5/1, 00:03:19 ago > > Routing Descriptor Blocks: > > * 204.11.106.41, from 204.11.106.1, 00:03:19 ago, via > GigabitEthernet5/1 > > Route metric is 11, traffic share count is 1 > > > > gsr-365-backup# > > > > Peter Kranz > > Founder/CEO - Unwired Ltd > > www.UnwiredLtd.com > > Desk: 510-868-1614 x100 > > Mobile: 510-207-0000 > > [EMAIL PROTECTED] > > > > > > _______________________________________________ > > cisco-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > This e-mail and its contents are subject to the DISCLAIMER at http://www.tno.nl/disclaimer/email.html _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
