On Thu, Oct 06, 2011 at 06:05:12PM -0500, Michael Vallaly wrote:
Fellow bird users,
I currently have a single router with two upstream eBGP sessions to two separate ISPs. IE:
ISP1 <---> Router <---> ISP2
I am attempting to advertise a public netblock to both of these ISPs simultaneously. I currently have a single kernel routing table (exterior) configured for the public netblock (203.0.113.0/24), below is a sample config.
I seem to have a problem in Bird 1.3.3 with this configuration where the netblock only gets advertised out one of the two upstream peers.
See https://git.nic.cz/redmine/projects/bird/wiki/BGP_example_2
When I enable both ext_isp1 and ext_isp2 protocols simultaneously it seems the BGP advertisement only happens via one peer only, (not both as I expect / want). Does it make sense that this doesn't work as I expect?
Problem is that only the best route is propagated. If the best route is filtered, second best route is not propagated. -- Elen sila lumenn' omentielvo Ondrej 'SanTiago' Zajicek (email: santiago@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."