I have a strange issue with ipv6 on Ubuntu 12.04.
There are two hosts, directly connected to the internet. Both have assigned a /64 network. They are properly configured with a /128 endpoint each and one can ping6 the other and vice versa. My plan was to terminate a /112 subnet of my assigned ipv6/64 to the interface to have plenty of addresses for usage in apache2 vhosts. But that's not the point.
$ ifconfig eth0 Link encap:Ethernet HWaddr (...) inet6 addr: fe80::5246:5dff:(...)/64 Scope:Link inet6 addr: 2a01:xxx:xxx:000A::2/64 Scope:Global $ route -A inet6 Kernel IPv6 routing table Destination Next Hop Flag Met Ref Use If 2a01:xxx:xx:000A::/64 :: U 256 0 0 eth0 fe80::/64 :: U 256 0 0 eth0 ::/0 fe80::1 UG 1024 0 0 eth0 ::/0 :: !n -1 1 5689 lo ::1/128 :: Un 0 1 18 lo 2a01:xxx:xx:000A::2/128 :: Un 0 1 202 lo 2a01:xxx:xx:000A::/112 :: U 1024 0 0 lo fe80::5246:5dff:fea1:977c/128 :: Un 0 1 86 lo ff00::/8 :: U 256 0 0 eth0 ::/0 :: !n -1 1 5689 lo
Host B can ping6 2a01:xxx:xx:000A::[0001-FFFF] correctly and works as I expected it. But on Host A, I cannot ping my own Addresses. If I try to ping6 2a01:xxx:xxx:000A::n, I get this one:
$ ping6 2a01:xxx:xxx:000A::3 PING (...) 56 data bytes ping: sendmsg: Invalid argument ping: sendmsg: Invalid argument ping: sendmsg: Invalid argument
I suspect the routing table, but I've played around with it a long time and even using google I can't get it work.
Any Ideas? Thanks.