Peering matrix information at IXPs
nanog-post at rsuc.gweep.net
Thu Jun 14 10:20:02 UTC 2007
On Wed, Jun 13, 2007 at 06:47:30PM +0200, Daniele Arena wrote:
> 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,
RSUC / GweepNet / Spunk / FnB / Usenix / SAGE
More information about the NANOG