Apparently the same problem was found and fixed in OpenSUSE in 2011: https://bugzilla.novell.com/show_bug.cgi?id=700771
** Bug watch added: Novell/SUSE Bugzilla #700771 https://bugzilla.novell.com/show_bug.cgi?id=700771 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1183762 Title: dhclient-script flushes & re-adds an alias IP every time a lease is renewed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1183762/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs