From: Micheal Patterson (no email)
Date: Wed Oct 05 2005 - 16:11:54 EDT
----- Original Message -----
From: "Daniel Roesen" <>
To: <>
Sent: Wednesday, October 05, 2005 2:11 PM
Subject: Re: Cogent/Level 3 depeering
>
> On Wed, Oct 05, 2005 at 02:08:01PM -0400, Richard A Steenbergen wrote:
>> You can only be a "tier 1" and maintain global reachability if you peer
>> with every other tier 1. Level 3 is obviously the real thing, and Cogent
>> is "close enough" (at least in their own minds :P) that they won't buy
>> real transit, only spot routes for the few things that they are missing
>> (ATDN and Sprint basically). There is no route "filtering" going on, only
>> the lack of full propagation due to transit purchasing decisions, or in
>> this case the lack thereof.
>
> Exactly. And this is why Cogent's statement to the public (and their
> customers) is an outright lie. Level 3 isn't "denying Level 3's
> customers access to Cogent's customers and denying Cogent's customers
> access to Level 3 customers.". It's just that they deny Cogent
> settlement-free direct peering anymore. Cogent can get the L3 and L3
> customer routes elsewhere if they want. But Cogent doesn't. It's Cogents
> decision to break connectivity, not L3's.
>
> If I would be a Cogent customer, I would have a _very_ warm word with my
> sales rep why they are trying to bs me with those kind of statements and
> think that I actually am dumb enough to believe that.
>
>
> Regards,
> Daniel
Some would argue about Cogent being a tier 1 carrier. I honestly don't know
anymore. All I do know, is that when I was still provisioning circuits
within PSINet years ago, PSINet was on the verge of being a tier 1 as they
had bilateral peering with the majority of the other tier 1 carriers at the
time. Now, when Cogent took over the PSINet fiber backbone, I've no idea if
they kept those peering points hot or not. If they did, then they should
have plenty of pathing to L3 even with the direct peer being down. As you
also said, I would think that if that traffic isn't getting through from
Cogent's net to L3, there's an issue with Cogent's routing of that traffic
unless L3 has placed a direct acl prohibiting any Cogent IP space from
entering their network. That's a big if though simply because of the amount
of traffic that will get just blown away by doing that.
-- Micheal Patterson Senior Communications Systems Engineer 405-917-0600 Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.
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