[57695] in North American Network Operators' Group
Re: selective auto-aggregation
daemon@ATHENA.MIT.EDU (bdragon@gweep.net)
Thu Apr 17 18:34:40 2003
To: nanog@merit.edu
Date: Thu, 17 Apr 2003 18:33:11 -0400 (EDT)
In-Reply-To: <390E55B947E7C848898AEBB9E507706041E744@msmdcfs01.msmgmt.com> from "McBurnett, Jim" at Apr 17, 2003 04:32:27 PM
From: <bdragon@gweep.net>
Errors-To: owner-nanog-outgoing@merit.edu
> Only 1 question:
> What about the companies that have a /24 out of the /20 0r /21 that are =
> multi-homed?
> If the route rules are not carefully prepared the multi-homed customer =
> then might be single-homed and tied to the upstream they got the IP's =
> from.
>
> Thoughts?
>
> Jim
I'm not seeing any scenarios which would differ from the existing practice
of filtering out said /24 entirely. Depending on how a particular entity
heard the /24, they may even continue to accept it as such without
aggregation. For example, if the company was announcing the /24 to a
peer of a network using this type of aggregation, the peer would still
see the route as a /24. Otherwise, they lose nothing by aggregating to
the /20 or /21 along their transit path.
