The problem her e is network-manager that doesn't know how to handle alias interfaces.
When n-m resets the primary interface, the alias is taken down but not reconfigured. Fabio ** Changed in: network-manager (Ubuntu) Sourcepackagename: ifupdown => network-manager Assignee: Fabio Massimo Di Nitto => (unassigned) -- ifup fails to bring up alias interfaces like eth0:10 https://launchpad.net/bugs/95968 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs