Hi list,
I've got two OpenBSD (5.1-STABLE, amd64) machines running OpenBGPd.
Both of them are connected to two upstream providers each,
furthermore
there are (older) Ciscos, also connecteed to the same (!) upstream
routers.
Recently, both OpenBSD machines lost their BGP session to one of the
upstream providers. On both machines the same upstream router was
affected.
Logs show this:
Sep 17 17:25:35 hostname bgpd[1638]: neighbor 12.23.34.45
(Upstream1):
sending notification: HoldTimer expired, unknown subcode 0
Sep 17 17:25:35 hostname bgpd[1638]: neighbor 12.23.34.45
(Upstream1):
state change Established -> Idle, reason: HoldTimer expired
Sep 17 17:25:43 hostname ospfd[5366]: desync; scheduling fib reload
Sep 17 17:25:43 hostname ospfd[5366]: reloading interface list and
routing table
Sep 17 17:25:48 hostname bgpd[15513]: nexthop 12.23.34.45 now valid:
directly connected
Sep 17 17:26:05 hostname bgpd[1638]: neighbor 12.23.34.45
(Upstream1):
state change Idle -> Connect, reason: Start
Sep 17 17:26:05 hostname bgpd[1638]: neighbor 12.23.34.45
(Upstream1):
state change Connect -> OpenSent, reason: Connection opened
Sep 17 17:26:05 hostname bgpd[1638]: neighbor 12.23.34.45
(Upstream1):
state change OpenSent -> OpenConfirm, reason: OPEN message received
Sep 17 17:26:05 hostname bgpd[1638]: neighbor 12.23.34.45
(Upstream1):
state change OpenConfirm -> Established, reason: KEEPALIVE message
received
Sep 17 17:26:20 hostname bgpd[15513]: nexthop 12.23.34.45 now valid:
directly connected
The Ciscos didn't see anything like this, their sessions didn't
drop.
Any clue what was going on?
Thanks,
Bernd
