4 Nov
2013
4 Nov
'13
10:41 a.m.
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.)