All Neutron CI jobs (except for unit, functional and fullstack jobs), have explicitly defined the network backend used: - linuxbridge - ovs - ovn That was discussed and approved during the Neutron CI meetings [1]. [1]https://meetings.opendev.org/meetings/neutron_ci/2021/neutron_ci.2021-06-15-15.00.log.html Change-Id: I036924f13b77dd5957ad5e60b9f536562deb9f05