[j-nsp] Odd BGP Issue

[Scott Morris]

Well, does your export policy to the neighbor have a reject statement after
the accepting of your own prefix list?

Scott 

-----Original Message-----
From: juniper-nsp-bounces at puck.nether.net
[mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Lee Hetherington
Sent: Saturday, July 05, 2008 3:06 PM
To: Shane Ronan
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] Odd BGP Issue

LOL, I am indeed announcing the entire route table to AS1200 from AS1299.

How can I stop this?  I am using the same prefix list to each provider, and
should only be announcing a specific range of IP's?


Many Thanks,

Lee

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Lee Hetherington

Technical Services Lead
REDtechnology.com
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-----Original Message-----
From: Shane Ronan [mailto:sronan at fattoc.com]
Sent: Sat 05/07/2008 19:52
To: Lee Hetherington
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] Odd BGP Issue
 
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
>
>
>
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net 
> https://puck.nether.net/mailman/listinfo/juniper-nsp


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