I managed to disable the dhcp server in my router. the result is that network manager waits for the dhcp timeout and then it assigns the no-ip configuration, through the eth0:avahi interface. So everything is working and I think we can close this bug
-- [feisty] nm gives me an ip even if there is no cable https://bugs.launchpad.net/bugs/78078 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs