[97398] in North American Network Operators' Group
Re: Peering matrix information at IXPs
daemon@ATHENA.MIT.EDU (Joe Provo)
Thu Jun 14 06:20:55 2007
Date: Thu, 14 Jun 2007 06:20:02 -0400
From: Joe Provo <nanog-post@rsuc.gweep.net>
To: nanog@merit.edu
Reply-To: nanog-post@rsuc.gweep.net
In-Reply-To: <f8f07cf00706130947p13043da8o31693810d21bd845@mail.gmail.com>
Errors-To: owner-nanog@merit.edu
On Wed, Jun 13, 2007 at 06:47:30PM +0200, Daniele Arena wrote:
[snip]
> Traffic matrices (at least up to now and AFAIK) have only been built
> by traffic measurements by IXPs whose switches all support sFlow. Not
> all switches do, so not many IXPs have that feature.
>
> Several IXPs have traffic matrices built on data entered manually.
> That is usually not too reliable as people forget to update the
> peering data after having updated their peerings on the routers.
Not to mention that even at member-driven IXes, you will find
members who believe they can keep their AS-level adjacencies
secret and opt-out. IMO, a major reason you don't see much
traction for this data in larger/non-co-op IXes (most of the US,
sadly).
Cheers,
Joe
--
RSUC / GweepNet / Spunk / FnB / Usenix / SAGE
