Re: Cogent IPV6 connectivity to fireball.acr.fi

[Clinton Work <clinton () scripty com>]

I should have stated that I tried icmpv6, UDP, and TCP traceroute with
the same results.  Looks like Cogent is not returning TTL expired IPV6
packets within their core.  I can only guess that this is a result of
using 6PE and propagating the IPV6 TTL into MPLS.  

Clinton 

On Sun, Nov 3, 2013, at 09:47 PM, Joe Abley wrote:
> "Traceroute packets" is extremely vague. As a general rule, if you
> want to discover a complete path between endpoints that are expected
> to communicate using 80/tcp, trace the route using 80/tcp.
>
> (Not that it's ever expected to see protocol-specific drops in a core
> or across a transit or peering edge.)