I'm not sure how this can be, but ... addresses in my delegated /64 seem to have good connectivity to the outside world, but the local tunnel endpoint doesn't. I can't ping from it, nor can I ping that address from tunnelbroker.net's ping6 page. I've triple checked that the v4 and v6 addresses assigned to the tunnel are what tunnelbroker tells me, and of course the setup must be mostly correct in order for the addresses in the /64 to have connectivity ... any ideas on what I'm missing here? Tcpdump shows encapsulated packets going out with the appropriate addresses on them, but nothing coming back.
Can you print out the commands you used to turn up your tunnel? From the tunnel-server I am able to ping your side of the tunnel:
Sending 5, 100-byte ICMP Echos to 2001:470:1F03:1BC::2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 64/64/68 ms
Incidentally we don't assign /128s, only /64s and /48s, so my guess is you are using a bsd system? I recall some of their configs needing /128 to work and not /64.