[Hampshire] Anyone know much about IPv6 tunnels?

Hi All.

I'm having a bit of a play with IPv6. I've got myself a tunnel, but I
can't seem to make it work.

I'm using aiccu to set up the tunnel. Running "aiccu start" seems to
succeed - but I can't actually get the tunnel working.

Trying to ping ipv6.google.com gets me the following error:

>From cl-1048.lon-02.gb.sixxs.net icmp_seq=1 Destination unreachable:
Address unreachable

Unless I've misread this, it looks like the far end of my tunnel is not
able to route packets, and the tunnel itself is operational.

Am I right?

Thanks.

Vic.