[147064] in North American Network Operators' Group
Re: bgp update destroying transit on redback routers ?
daemon@ATHENA.MIT.EDU (Igor Ybema)
Thu Dec 1 12:04:09 2011
In-Reply-To: <20111201163803.GA50110@snar.spb.ru>
Date: Thu, 1 Dec 2011 18:03:17 +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
>
> AGGREGATOR is an optional transitive attribute of length 6.
>
> --
> In theory, there is no difference between theory and practice.
> But, in practice, there is.
Typical, because:
AGGREGATOR is an optional transitive attribute of length 6.
The attribute contains the last AS number that formed the
aggregate route (encoded as 2 octets), followed by the IP
address of the BGP speaker that formed the aggregate route
(encoded as 4 octets). Usage of this attribute is described
in 5.1.7
And what to do with 4-byte AS-numbers then? That would explain the 8 bytes.
regards, Igor
