I think I have the same issue on 14.04 Server, at least it appears to be the same issue. No network-manager.
If the server is configured for DHCP and you later change it to static, the dhcp client daemon still goes out and requests a DHCP address. This impacts DNS for the device. The static IP remains on the interface, but the DNS record changes making it unreachable via hostname. The work around that I found, other than killing the dhclient process, is deleting the dhcp client database and rebooting. rm /var/lib/dhcp/dhclient.* You could probably just kill the related interface files if you wanted to. Based on the way this is behaving, I suspect its the same issue as not having the interface active. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dhcp3 in Ubuntu. https://bugs.launchpad.net/bugs/190359 Title: dhclient continually seeks ip address on unconnected interface To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dhcp3/+bug/190359/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs