Cogent IPv6

Owen DeLong owen at
Thu Jun 9 00:51:38 UTC 2011

On Jun 8, 2011, at 7:18 AM, ryan at wrote:

> On Wed, 8 Jun 2011 09:51:21 -0400, Nick Olsen wrote:
>> I'm sure someone here is doing IPv6 peering with cogent. We've got a Gig
>> with them, So they don't do that dual peering thing with us. (They do it
>> on
>> another 100Mb/s circuit we have... I despise it.)
>> Just kind of curious how they go about it.
>> Do they issue you a small IPv6 block for your interface, just like they
>> do
>> for IPv4? Is it a separate session? Any things to be aware of before
>> pulling the trigger on it? (Other then them not having connectivity to
>> HE's
>> IPv6 side of things, Wish they would fix that already...)
>> Nick Olsen
>> Network Operations (855) FLSPEED x106
> We have separate v4 and v6 sessions with them on the same dual-stack interface (a v4 /29 and v6 /112 on the interface).  One session is between our v4 address and theirs, and carries v4 prefixes only.  Then another session between v6 addresses that carries v6 prefixes only.

That's really the best way to do dual stack peering anyway.

Keeps things much cleaner.


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