[57694] in North American Network Operators' Group
Re: selective auto-aggregation
daemon@ATHENA.MIT.EDU (william@elan.net)
Thu Apr 17 18:30:37 2003
Date: Thu, 17 Apr 2003 13:48:47 -0700 (PDT)
From: william@elan.net
To: Jack Bates <jbates@brightok.net>
Cc: nanog@merit.edu
In-Reply-To: <3E9F24D6.5090509@brightok.net>
Errors-To: owner-nanog-outgoing@merit.edu
I do it. Reasons are to control inbound traffic better, some routes are
annnounced to all upstreams, some are to some specific ones, some have
different communities tagged to them, etc. I have one block which is /19
which I do not announce and only announce multiple /23, /24 out of. It
works just fine - I'v not seen one place which does not route there...
> I was curious how much of the de-aggregation was due to multi-homed
> companies requiring the longer prefixes. Are there companies that
> actually announce their smaller routes despite controlling the shorter
> prefix? What would be the benefit of doing so?
>
> -Jack
>
