Level3 (3356/3549) changes routing policy
david.reader at zeninternet.co.uk
Thu Aug 2 07:41:29 CDT 2012
On Thu, 2 Aug 2012 10:33:38 +0200
Fredy Kuenzler <kuenzler at 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):
> is preferred over
> 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.
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.
More information about the NANOG