Re: pingability of 2600::

On 15.01.2026 14:56 Brandon Martin via NANOG wrote:

Cogent is well known for having incomplete global IPv6 connectivity.

Does your network have a route to 2600::? Does Cogent have a route to your network? If you're on AS6939, the answer to both of those is probably "no". Obviously in that case, you're not going to be able to ping it even if there's a host there listening and willing to respond.

This is not limited to HE. E.g. AS3320 doesn't have a route to 2600::/29 - and they peer on IPv6 - e.g. 2001:550::/32 is being in their table directly connected to AS174. Are there some people form Cogent here who can clarify that?