it looks that there's unreachable IPv6 prefix advertised at the venue.
please stop this router advertisement (2001:468:1420:f::/64),
or fix conectivity... with this configuration i can't use IPv6 to
connect to my home.
itojun
itojun[coconut:~] traceroute6 -n -q1 2001:468:1420:f:220:e0ff:fe8d:3a8c
traceroute6 to 2001:468:1420:f:220:e0ff:fe8d:3a8c (2001:468:1420:f:220:e0ff:fe8d:3a8c) from 2001:298:308:1:2ae:d0ff:fe00:3b, 30 hops max, 12 byte packets
1 2001:298:308:1:200:24ff:fec0:55de 0.878 ms
2 3ffe:8360:1000::2000 5.885 ms
3 3ffe:8360:1000::1 5.252 ms
4 3ffe:8360:1000:1::3 6.879 ms
5 3ffe:8360:0:1000::1:1 7.379 ms
6 2001:200:0:1800:230:48ff:fe41:4e50 5.001 ms
7 2001:200:0:1800::9c4:2 5.16 ms
8 2001:200:0:1800::9c4:0 5.142 ms
9 2001:200:0:6c01:290:27ff:fe3a:d8 5.557 ms
10 2001:200:0:6c01:209:11ff:fedb:19fe 144.071 ms
11 2001:468:ff:b17::1 390.569 ms
12 2001:468:ff:b17::2 389.938 ms
13 2001:468:ff:1317::1 390.554 ms
14 2001:468:ff:1213::1 402.714 ms
15 2001:468:ff:6c1::1 390.262 ms
16 2001:468:ff:306::1 397.108 ms
17 2001:468:ff:354::2 419.125 ms !A