Anyone from ARIN listening?

[James Jun]

> Third location (AS31333, 2001:4d88::/32) stalls again, I don't have
> access to their BGP but trace shows Tiscali-OCCAID-ARIN as well. Return
> path is 30071 3549 15598 31333.
> 
> All that would point to OCCAID-GBLX. http://www.occaid.org loads fine
> for me as well, but there is a tunnel involved inside OCCAID
> 

It's actually a Metro-E circuit we're running at MTU capped to 1480. We're
having some technical issues with one of our IGP implementations that's
confused between having different MTU'd links.  So as a temporary workaround
we're using consistent 1480 MTU still on a number of backbone links until we
complete migration off of the tunnels.

> 
> if the path is symmetric return traffic would see pMTU to 1480 inside
> OCCAID, so pMTU issues on OCCAID-GBLX might not be seen.

As a matter of experiment, 2001:4d88::/32 is temporarily rerouted via 3257
(Tiscali) peer.  Please check and see if you are still having pMTU problems.

james