Cogent & HE

Paul Stewart paul at
Wed Jun 8 21:23:18 UTC 2011

For what it's worth, we have a number of IPv6 peers in place plus IPv6
transit from Level(3), HE, and TiNet. 

For downstream customers, we are currently exporting them 6250 prefixes on

>From TiNet we are getting 6168 prefixes
>From Level(3) we are getting 4933 prefixes
>From HE we are getting 5990 prefixes

Hope this helps a bit ;) 


-----Original Message-----
From: jayhanke at [mailto:jayhanke at] On Behalf Of Jay Hanke
Sent: June-08-11 4:47 PM
To: Paul Stewart
Cc: Ken Chase; nanog at
Subject: Re: Cogent & HE

On Wed, Jun 8, 2011 at 3:19 PM, Paul Stewart <paul at> wrote:
> Or peer with HE and buy transit from Cogent (or someone on Cogent's
> list) - this is where I think their strategy is going to go after a while
> with a lot of folks (if they have the option - that's the key).  HE will
> peer with anyone I believe - Cogent has much more stringent "tier1" rules
> peering.

How divided is the table? I see about 98 routes transiting Cogent ASN
via a HE connection. Customer has only has HE as v6 upstream. An
previous post listed about a 1300 prefix difference. That's pretty
significant unless it's due to aggregation or something. I'd also be
interested to see the size of the other major carriers v6 tables so I
can patch a whole until the other upstream is ready.


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