Dear Maintainer, Where VLANS are used in conjunction with ucarp, a loss of power to the ethernet port will trigger ucarp to remove the $dev:ucarp alias interfaces, but it will also remove all the VLAN inferfaces (this is related to bug 742018). This will happen if the switch is rebooted, the port turned off, or the cable unplugged. restarting networking did not help. I did not test specifically killing ucarp before trying.