It looks like this has been fixed upstream. I will close it. If the problem still occurs, please reopen it.
** Changed in: linux (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/917643 Title: Adding IPv6 address to vlan in UNKNOWN state results in routes that expire within 30 days. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/917643/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs