Hmm, I did a quick tcpdump the day before but didn't spot any withdrawals.
Today, however , I do see both routes being accepted. The only difference
between before and now is that the next-hop is no longer the same as the IP
of the session where this was learned.
On Mar 11, 2015 5:06 AM, "Ondrej Zajicek" <santi...@crfreenet.org> wrote:
> 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: santi...@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."
>
bird> show protocols all
name proto table state since info
device1 Device master up 12:04:01
Preference: 240
Input filter: ACCEPT
Output filter: REJECT
Routes: 0 imported, 0 exported, 0 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 0 0 0 0 0
Import withdraws: 0 0 --- 0 0
Export updates: 0 0 0 --- 0
Export withdraws: 0 --- --- --- 0
Exa1 BGP master up 12:05:27 Established
Description: Exa1
Preference: 100
Input filter: ACCEPT
Output filter: ACCEPT
Routes: 1 imported, 0 exported, 1 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 1 0 0 0 1
Import withdraws: 0 0 --- 0 0
Export updates: 1 1 0 --- 0
Export withdraws: 0 --- --- --- 0
BGP state: Established
Neighbor address: 192.168.3.4
Neighbor AS: 65010
Neighbor ID: 192.168.3.4
Neighbor caps: AS4 add-path-rx add-path-tx
Session: external route-server AS4
Source address: 192.168.3.3
Hold timer: 145/180
Keepalive timer: 28/60
Exa2 BGP master up 12:05:28 Established
Description: Exa2
Preference: 100
Input filter: ACCEPT
Output filter: ACCEPT
Routes: 1 imported, 1 exported, 0 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 1 0 0 0 1
Import withdraws: 0 0 --- 0 0
Export updates: 1 0 0 --- 1
Export withdraws: 0 --- --- --- 0
BGP state: Established
Neighbor address: 192.168.4.4
Neighbor AS: 65010
Neighbor ID: 192.168.4.4
Neighbor caps: AS4 add-path-rx add-path-tx
Session: external route-server AS4
Source address: 192.168.4.3
Hold timer: 111/180
Keepalive timer: 9/60
ExaOut BGP master up 12:13:07 Established
Description: main exa
Preference: 100
Input filter: ACCEPT
Output filter: ACCEPT
Routes: 0 imported, 2 exported, 0 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 0 0 0 0 0
Import withdraws: 0 0 --- 0 0
Export updates: 2 0 0 --- 2
Export withdraws: 0 --- --- --- 0
BGP state: Established
Neighbor address: 192.168.5.4
Neighbor AS: 65011
Neighbor ID: 192.168.5.4
Neighbor caps: refresh restart-aware AS4 add-path-rx add-path-tx
Session: external route-server AS4 add-path-rx add-path-tx
Source address: 192.168.5.3
Hold timer: 187/240
Keepalive timer: 44/80
================
bird> show protocols all
name proto table state since info
device1 Device master up 12:11:29
Preference: 240
Input filter: ACCEPT
Output filter: REJECT
Routes: 0 imported, 0 exported, 0 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 0 0 0 0 0
Import withdraws: 0 0 --- 0 0
Export updates: 0 0 0 --- 0
Export withdraws: 0 --- --- --- 0
EXT BGP master up 12:13:07 Established
Preference: 100
Input filter: ACCEPT
Output filter: ACCEPT
Routes: 2 imported, 0 exported, 1 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 2 0 0 0 2
Import withdraws: 0 0 --- 0 0
Export updates: 2 2 0 --- 0
Export withdraws: 0 --- --- --- 0
BGP state: Established
Neighbor address: 192.168.5.3
Neighbor AS: 65012
Neighbor ID: 192.168.5.3
Neighbor caps: refresh restart-aware AS4 add-path-rx add-path-tx
Session: external AS4 add-path-rx add-path-tx
Source address: 192.168.5.4
Hold timer: 182/240
Keepalive timer: 47/80
bird> show route all
192.168.200.0/24 via 192.168.5.3 on eth1 [EXT 12:13:07] * (100) [AS65010i]
Type: BGP unicast univ
BGP.origin: IGP
BGP.as_path: 65010
BGP.next_hop: 192.168.10.4
BGP.local_pref: 100
via 192.168.5.3 on eth1 [EXT 12:13:07] (100) [AS65010i]
Type: BGP unicast univ
BGP.origin: IGP
BGP.as_path: 65010
BGP.next_hop: 192.168.11.4
BGP.local_pref: 100
bird>
