[155228] in North American Network Operators' Group
Re: Level3 (3356/3549) changes routing policy
daemon@ATHENA.MIT.EDU (David Reader)
Thu Aug 2 08:42:50 2012
Date: Thu, 2 Aug 2012 13:41:29 +0100
From: David Reader <david.reader@zeninternet.co.uk>
To: nanog@nanog.org
In-Reply-To: <501A3B62.9020003@init7.net>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Thu, 2 Aug 2012 10:33:38 +0200
Fredy Kuenzler <kuenzler@init7.net> wrote:
> From my observation Level3 has recently changed their routing policy. It
> seems that 3356 always prefers customer prefixes of 3549, regardless of the
> AS path length. Example (seen from 3356):
>
> 3549_13030_[Customer1]_[Customer2]
>
> is preferred over
>
> 2914_[Customer1]_[Customer2]
>
> Considering that both 2914 and 3549 are peers of 3356, and 13030 is a
> customer of 3549, 3356 seems to give higher local-pref on the longer
> AS-path, likely to increase traffic and revenue of their sister network 3549.
Hi Fredy,
Level 3 owns both 3356 and 3549.
They're simply preferring to have their customers pay them, rather than
a 3rd party.
I don't think it's suprising at all that they're doing it. If, as you
think, it's only happened recently then what is suprising is that it
didn't happen sooner IMO.
d.
