[c-nsp] learned routes disappear

[Paul A]

Thanks Walter.

I really didn't want to mess with debug as it's a production router and I
would have to do this late night, hopefully without crashing it. I really
was hoping someone ran into this issue before.

FYI the 1st update-source is from router A to my bgp customer on fa1/43 the
other is from router A to router B on loop0
So I think that's fine.

-----Original Message-----
From: Walter Keen [mailto:walter.keen at RainierConnect.net] 
Sent: Friday, February 06, 2009 12:40 PM
To: Paul A
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] learned routes disappear

I would turn on debugging and see if 1:15m corresponds to one of the BGP
nexthop scanning or other events.  Don't leave debugging on any longer
than needed on production systems.  If you can replicate in a lab
scenario, that would be ideal.  One thing that looks odd, is that you
have 2 different update-source interfaces listed on RouterA's neighbor
configuration for RouterB


Paul A wrote:
> Hi, I'm having a bgp issue I can't figure out and hoping someone has ran
> into this.
>
>  
>
> I have two routers, router A and router B doing bgp.
>
>  
>
> Router A is advertising 5 routes to router B, when the session 1st comes
up,
> router B has 5 routes received from router A. After 1:15 min the learned
> routes on router B disappear.
>
>  
>
>  
>
> Router A
>
> Learns the routes from one of my bgp customers.
>
>  
>
> neighbor 2xx.xx.xx.xx description xxx
>
>  neighbor 2xx.xx.xx.xx update-source FastEthernet1/43
>
>  neighbor 2xx.xx.xx.xx default-originate
>
>  neighbor 2xx.xx.xx.xx prefix-list PxxPL-IN in
>
>  neighbor 2xx.xx.xx.xx route-map PLIN in
>
>  neighbor 2xx.xx.xx.xx filter-list 109 in
>
>  neighbor 2xx.xx.xx.xx filter-list 2 out
>
>  neighbor 2xx.xx.xx.xx remote-as xxx
>
>  neighbor 2xx.xx.xx.xx update-source Loopback0
>
>  neighbor 2xx.xx.xx.xx next-hop-self
>
>  
>
> it advertises them to the configured neighbor on router A
>
>  
>
> neighbor 216.xxx update-source Loopback0
>
>  neighbor 216.xxx next-hop-self
>
>  neighbor 216.xxx filter-list 1 in
>
>  neighbor 216.xxx filter-list 1 out
>
>  
>
> If I clear the bpg session or when the session 1st comes up on router B, I
> see the routes but then they disappear after 1:15 min.
>
>  
>
> Thanks PA
>
>  
>
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>   

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