BIRD ignored routes

Ondrej Zajicek santiago at crfreenet.org
Wed Mar 11 10:06:24 CET 2015


On Tue, Mar 10, 2015 at 03:04:53PM -0400, Nat J wrote:
> Hi All,
> 
> I’m having an issue with bird ignoring some prefixes it’s receiving. I'm
> new to bird and may be overlooking something simple. The config is
> essentially this
> 
> [1] Exabpg1:AS_X < — > BIRD:AS_Y (route-server)
> [2] Exabgp2:AS_X < — > BIRD:AS_Y (route-server)
> 
> [3] BIRD:AS_Y < — > BIRD:AS_Z
> 
> [1] & [2] behave as expected, however when the route-server exports to the
> 2nd BIRD instance the routes are ignored. The debug file unfortunately
> makes no mention of the routes being ignored. Any suggestions on how I can
> find the cause for those being ignored.

Hi

First thing to try would be to run just one Exabgp link, with disabled
add-path, to see if something changes. Another good idea would be to try
to catch the [3] with tcpdump, as the receiver (AS_Z) not only ignore
these updates, but also consider them to be withdraws.

-- 
Elen sila lumenn' omentielvo

Ondrej 'Santiago' Zajicek (email: santiago at 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."
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