I think this is essentially the same as the RHEL bug https://bugzilla.redhat.com/show_bug.cgi?id=665601 that was fixed earlier this year.
** Bug watch added: Red Hat Bugzilla #665601 https://bugzilla.redhat.com/show_bug.cgi?id=665601 -- 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
