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IPv6 with ISATAP Configuration Example
That's how you can get IPv6 in your office box.
How it works is described in RFC5214
You will need to start ISATAP daemon running on your host, and you are all set.
Of course depending where the ISATAP gateway is, the results might be different.
From the Brussels office it makes for about 300ms RTT to ipv6.google.com - not terribly good at all, but still better than nothing.
When coming from ECT, this is even more fun:
ayourtch@ayourtch-lnx:~$ ping6 ipv6.google.com PING ipv6.google.com(2a00:1450:8001::6a) 56 data bytes 64 bytes from 2a00:1450:8001::6a: icmp_seq=1 ttl=53 time=351 ms 64 bytes from 2a00:1450:8001::6a: icmp_seq=2 ttl=53 time=348 ms 64 bytes from 2a00:1450:8001::6a: icmp_seq=3 ttl=53 time=346 ms 64 bytes from 2a00:1450:8001::6a: icmp_seq=4 ttl=53 time=351 ms 64 bytes from 2a00:1450:8001::6a: icmp_seq=5 ttl=53 time=343 ms
get isatapd and start it as root. You have IPv6.