Comment 39 for bug 1734320

In nova, there is also some code in nova/network/linux_net.py (specifically, class LinuxOVSInterfaceDriver) that seems to have plug() method that calls add-port and would benefit from dead tag setting too, but I failed to find a place where this code is hooked into actual services, so I wonder if this code is not some dead end that will be cleaned up in due course after os-vif switch. I will leave it up to nova team to decide.