Sounds like with your configuration you are transiting traffic
between your two peer AS's.
Can you run 'show route advertising-protocol <neighbor>' for each of
your two peer's when you have both up and running?
It may be that the 2meg link is saturated and the keepalive messages
are not making it across in time.
Just a thought.
Shane
On Jul 5, 2008, at 11:45 AM, Lee Hetherington wrote:
Hi All,
I have a very odd problem with a J Series router and wonder if
anyone can help, as neither our providers nor JTAC can shed any
light on this one.
We have a J2320-JH, it has a Link to AS1200 over a 2meg serial x.21
connection and then a 100meg connection to AS1299 over ethernet. I
have bgp from our as accepting ANY from them and announcing a
single /23 network to them.
My original 2meg connection has been stable and running a BGP
session with no flapping for almost 3 weeks now. As soon as I
introduce the new peer, the route table increases as you'd expect
to around 500k routes, becomes stable with 245k active routes and
then the originally stable connection starts to flap giving a Hold
Timer Expired Error. This then keeps flapping.
Whilst this first session is flapping there are no errors on the
interfaces to either AS1200 or AS1299. However, whilst the session
is flapping I note that almost exactly 1mbits/sec is going out of
our new AS1299 connection and comming into our AS1200 connection.
This traffic however does not come onto our LAN as the gig
connection to our switch is showing none or very minimal traffic.
The guys at AS1200 havent got back to me yet, but the guys from
AS1299 have told me to check my prefix-limit, but I dont currently
have this configured. JTAC tell me my router is fine and my
configuration is correct.
Anyone have an idea? The providers seem to be stumped but this
leaves me with one peer disabled currently.
Thanks,
Lee
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