[162923] in North American Network Operators' Group
Re: Traffic shaping going on?
daemon@ATHENA.MIT.EDU (Jared Mauch)
Wed May 8 13:09:21 2013
From: Jared Mauch <jared@puck.nether.net>
In-Reply-To: <CAM8Fm=7MaFObcsceRSLTpb9KpcuqcUjSdGOLVJ6HUwjduB0OtQ@mail.gmail.com>
Date: Wed, 8 May 2013 13:09:02 -0400
To: Ray Wong <rayw@rayw.net>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On May 8, 2013, at 10:54 AM, Ray Wong <rayw@rayw.net> wrote:
> Doesn't seem directly correlated with outages, and everything seems to =
be
> working ok, but I'm seeing about a 20-30% shift in flows from AS7792 =
to
> AS3356. Seems unlikely that many ISPs have suddenly turned up a level3 =
link
> on the same day/hour, and performance metrics all seem normal. I =
confess
> I've had to turn my attention away from network issues to
> systems/DB/security ones lately, so I may have missed something. =
Anyone
> else seeing fairly significant next hop shifts over the previous 24 =
hours?
> All of yesterdays major outages I was sort of suspecting seem to have =
been
> resolved without correlating shifts back.
Just a random guess:
Level3 could be migrating/integrating further networks which has =
triggered this shift. They do represent over 50% of the networks out =
there
http://as-rank.caida.org/?mode0=3Das-ranking&n=3D50&ranksort=3D1
You can see here they have 51% of AS'es and 55% of IPv4 prefixes behind =
them.
If you look at the combined, it's even more @69%/72% here:
http://as-rank.caida.org/?mode0=3Dorg-info&mode1=3Dmember-ases&org=3DLVLT-=
ARIN
- Jared=
