I found this PPA with ifupdown 0.7beta2 for oneiric and it fixed the issue for me:
https://launchpad.net/~davewalker/+archive/ifupdown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/876829 Title: Oneiric's ifupdown breaks ip aliases To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/876829/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
