mailing list archives
Re: bgp update destroying transit on redback routers ?
From: Alexandre Snarskii <snar () snar spb ru>
Date: Thu, 1 Dec 2011 20:38:03 +0400
On Thu, Dec 01, 2011 at 05:07:15PM +0100, Igor Ybema wrote:
Since about 15:00u GMT we receive bgp updates from our transit which
destroys the bgp sessions with them with message:
send NOTIFICATION: 3/9 (update: optional attribute error) with 11 byte
We use redback smartedge routers (SE100) currently for BGP.
Anyone who have seen this also?
Have a complaint from our customer too. On our side (juniper) this is
NOTIFICATION received from <peer-ip> (External AS <peer-as>): code 3
(Update Message Error) subcode 9 (error with optional attribute),
Data: c0 07 08 00 00 00
As far as I can decode this attribute this is:
c0: optional, transitive, no partial, no extended-length
08: attribute length is 8 bytes.
I think attribute length may be a problem here, because per RFC
AGGREGATOR is an optional transitive attribute of length 6.
In theory, there is no difference between theory and practice.
But, in practice, there is.