[147065] in North American Network Operators' Group
Re: bgp update destroying transit on redback routers ?
daemon@ATHENA.MIT.EDU (Igor Ybema)
Thu Dec 1 12:09:49 2011
In-Reply-To: <CANwiKaaRr6zd62_MSnPE2VRHs-kZBsO9YbKMQ97w-a0JDBhAvg@mail.gmail.com>
Date: Thu, 1 Dec 2011 18:08:54 +0100
From: Igor Ybema <igor@ergens.org>
To: Alexandre Snarskii <snar@snar.spb.ru>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> And what to do with 4-byte AS-numbers then? That would explain the 8 bytes.
>
Looking futher:
Two new attributes, AS4_PATH and AS4_AGGREGATOR, are introduced that
can be used to propagate four-octet based AS path information cross
BGP speakers that do not support the four-octet AS numbers.
However this router is AS4 capable, but probably fails to understand a
4-byte AS in the normal AGGREGATOR attribute. If I understand
correctly a AS4 capable router should understand when announcing that
to it's peer.
I'm I correct? Should I file this as a bug? (redback/ericsson is
already looking also)
regards, Igor
