[c-nsp] Disappearing prefixes in BGP

[Pekka Savola]

On Thu, 3 Aug 2006, Richard Mikisa wrote:
> On 8/3/06, Shakeel Ahmad <shakeelahmad at gmail.com> wrote:
>>
>> Is the next-hop reachable from this router ?
>
> it is
>>
>>
>> *>i217.212.230.0/23 217.212.243.254          0    100      0 i
>> *>i217.212.242.0/23 217.212.243.254          0    100      0 i
>>
>> also try debugging the withdraw messages for this peer.
>
> swings between accessible and inaccessible. Connectivity between the
> two is there however and I have next-hop self set on 217.212.242.254.

Just to be clear, do you have a more specific (non-BGP) route towards 
the next-hop?  That next-hop is covered by the latter /23 which may or 
may not be causing issues.  (We certainly have had issues in both 
Cisco's using (BGP or static route) aggregates for next-hops which 
results in various kinds of issues, flapping prefixes being one 
of them.)

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings