ip6

Finally have ip6 (albeit as a tunnel) up and running again, from my home system:

% ping6 open.nlnetlabs.nl 
PING open.nlnetlabs.nl(open.nlnetlabs.nl) 56 data bytes
64 bytes from open.nlnetlabs.nl: icmp_seq=1 ttl=61 time=7.32 ms
64 bytes from open.nlnetlabs.nl: icmp_seq=2 ttl=61 time=7.32 ms
64 bytes from open.nlnetlabs.nl: icmp_seq=3 ttl=61 time=7.36 ms
^C

Bloody shame I didn't do this sooner.