Fixing MTU issues - would somebody like a 'tracepath6 from 47 different ISPs'? (Was: Test your connectivity for World IPv6 Day)

[Andrew Yourtchenko]

>> Though sometimes it is a bit more complicated than just ICMP being
>> blocked.
>> (speaking from personal experience with tracking down s/w bugs).
>
> Yes, for example when a router in the middle sends the packet too big with a link-local address as source.
>

yes, CSCtk93753/CSCtn04646 were one of the cases I had in mind.

cheers,
andrew