[99469] in North American Network Operators' Group
RE: Route table growth and hardware limits...talk to the filter
daemon@ATHENA.MIT.EDU (michael.dillon@bt.com)
Sun Sep 23 10:26:15 2007
Date: Sun, 23 Sep 2007 15:18:00 +0100
In-Reply-To: <Pine.LNX.4.61.0709220918150.24441@soloth.lewis.org>
From: <michael.dillon@bt.com>
To: <nanog@nanog.org>
Errors-To: owner-nanog@merit.edu
> Has everyone forgotten the "Tier 1 depeerings" of several=20
> years ago? i.e.=20
> If you were pointing default at C&W, PSINet, Cogent, or=20
> Level3 when they each had or caused depeering issues, parts=20
> of the internet ceased to be reachable. In such cases,=20
> having full routes from multiple providers was the only way=20
> to be automatically protected from such games.
Not so. Anyone who had sufficient transit was also protected from
the games. Lots of so-called regionals and tier-2 networks were=20
shielded from this monkey-business. And, of course, they shielded
their customers as well. A tier-1 network operator who operates such
a fragile network becomes a single point of failure. And not just
because of peering as the AT&T frame relay collapse shows.
--Michael Dillon
