North American Network Operators Group
Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: Arbitrary de-peering

  • From: Jon Lewis
  • Date: Mon Jul 28 12:28:53 2008
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                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________