Description of problem:
Neutron introduced a new systemd service called neutron-destroy-patch-ports. It should be enabled if ovs-agent service is enabled. The service is one-shot.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHEA-2017:3462