[106400] in North American Network Operators' Group
Re: Arbitrary de-peering
daemon@ATHENA.MIT.EDU (Jon Lewis)
Mon Jul 28 12:28:42 2008
Date: Mon, 28 Jul 2008 12:27:18 -0400 (EDT)
From: Jon Lewis <jlewis@lewis.org>
To: William Waites <ww@styx.org>
In-Reply-To: <37F98BA4-6F4B-438A-BBDE-6B7AD58E26F0@styx.org>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Mon, 28 Jul 2008, William Waites wrote:
>> Neither network has transit. What other path is there to take?
Bit bucket path.
> http://www.renesys.com/blog/2008/03/he_said_she_said_cogent_vs_tel.shtml
>
> "Then Cogent de-peered Telia and suddenly Verizon and others started
> providing a path
> between the two and their respective customers."
>
> Which is as it should be. Then somebody (not clear who) apparently took
> explicit steps to stop the traffic from taking these other paths.
> Surprising. Severing a peering relationship is one thing, purposely
> filtering large swathes of the Internet over other all links is quite
> another.
>
> As I said, this is surprising behaviour, but not simple de-peering. And I'm
Why is it surprising? Sounds more like a repeat performance to me.
Back when Level3 depeered Cogent, it was said that Cogent was already
buying transit from Verio to reach at least some networks they weren't
peering with. After the depeering, why didn't Cogent get to Level3 (and
vice versa) via Verio?
Was the reason ever made public?
> Tier 1 has enough peering relationships with enough other Tier 1
> networks that they can always buy temporary transit privileges over an
> existing link.
Tier 1 means you don't buy transit, no?
----------------------------------------------------------------------
Jon Lewis | I route
Senior Network Engineer | therefore you are
Atlantic Net |
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