As a great workaround, I stopped using VLAN interfaces like "eth0.X", and now I'm using it like this "vlanX"... It is working better (still no not free of problems).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/850566 Title: does not configure ipv6 vlan interfaces due to autoconf sysctl failure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/850566/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs