BGP route flap damping

Mon Jan 16 19:36:19 UTC 2006

On Jan 16, 2006, at 8:48 AM, Gustavo Rodrigues Ramos wrote:

> Patrick W. Gilmore wrote:
>>
>> Not much you can do about this in general.  In your specific case,
>> since we don't know why your sessions died, we don't know what to
>> suggest to stop it.  Perhaps change the timers with your upstream?
>
> My BGP connections (and annoucements) with/to my ISPs are all fine.
>
> The problem takes place five or six AS far from me... Where I can't do
> much. I still can't reach some prefixes announced by large ISPs.
>
> At the first time, I thought an e-mail to the NOC of the network I  
> can't
> reach can solve the problem, but it was a waste of time...

I'm a little confused.

Are you saying you dampened the prefixes of some other network?  If  
so, it sounds like this is 100% in your control.

If the BGP sessions between you and your upstreams / peers never  
flapped, no one should have dampened you.  (I can see it possibly  
happening if someone else in the path between you and $OtherNetwork  
is attacked and therefore flaps your routes, but that would affect a  
lot of networks, not just you.)

-- 
TTFN,
patrick