nanog mailing list archives
Re: Level 3's side of the story
From: "Patrick W. Gilmore" <patrick () ianai net>
Date: Sat, 8 Oct 2005 16:37:29 -0400
On Oct 8, 2005, at 3:07 PM, Richard A Steenbergen wrote:
Teleglobe depeers Cogent due to various ratio and market pressure issues.Of note is that Cogent has recently entered the Canadian market where Teleglobe has a strong presence, and has started giving away free or nearly free transit to large inbound networks. Teleglobe is a Sprint customer, and Cogent reaches Sprint through Verio. Teleglobe is caughtcompletely off-guard when Cogent refuses to accept the route via Sprinttransit, and blocks traffic between the networks. This continues forseveral days, until eventually routes are leaked/added from Teleglobe to SAVVIS (AS3561), who Cogent peers with. This continues for a few days moreuntil Teleglobe finally agrees to repeer Cogent.
[SNIP]You mention at least twice (here and in the FT depeering paragraph) that Cogent "accepts" the routes.
It is entirely possible, and in fact likely IMHO, that the prefixes were never offered by Verio to Cogent. Cogent pays Verio for partial transit, why would Verio give Cogent more ASes than they paid for? If Verio doesn't announce the prefixes, how can Cogent filter them?
Of course, I do not have enable on Cogent or Verio border routers, so I cannot say for certain. Would anyone who _knows_ care to enlighten us?
-- TTFN, patrick
Current thread:
- Re: Level 3's side of the story, (continued)
- Re: Level 3's side of the story James (Oct 07)
- RE: Level 3's side of the story David Hubbard (Oct 07)
- RE: Level 3's side of the story Jon Lewis (Oct 07)
- Re: Level 3's side of the story Richard A Steenbergen (Oct 07)
- Re: Level 3's side of the story Richard A Steenbergen (Oct 07)
- Re: Level 3's side of the story Eric Louie (Oct 08)
- Re: Level 3's side of the story JC Dill (Oct 08)
- Re: Level 3's side of the story Leo Bicknell (Oct 08)
- Re: Level 3's side of the story Will Yardley (Oct 08)
- RE: Level 3's side of the story Jon Lewis (Oct 07)
- Re: Level 3's side of the story Richard A Steenbergen (Oct 08)
- Re: Level 3's side of the story Patrick W. Gilmore (Oct 08)
- Re: Level 3's side of the story Richard A Steenbergen (Oct 08)
- Re: Level 3's side of the story Patrick W. Gilmore (Oct 08)
- Re: Level 3's side of the story Stephen J. Wilcox (Oct 08)
- Re: Level 3's side of the story jmalcolm (Oct 09)
- Re: Level 3's side of the story James (Oct 08)
- Re: Level 3's side of the story John Curran (Oct 08)
- Re: Level 3's side of the story Patrick W. Gilmore (Oct 08)
- Re: Level 3's side of the story Matthew Crocker (Oct 08)
- Re: Level 3's side of the story Stephen J. Wilcox (Oct 08)
- Re: Level 3's side of the story Richard A Steenbergen (Oct 08)