Verified on puddle RHOS-16.1-RHEL-8-20220121.n.1 which uses python3-networking-ovn-migration-tool-7.3.1-1.20220113183500.4e24f4c.el8ost.noarch.rpm. Verified that the code change exist in rpm, OVN migration workload router is created before starting the workload VMs and the OVN migration workload VMs started successfully on ML2/OVS DVR environment.
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 (Red Hat OpenStack Platform 16.1.8 bug fix and enhancement 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/RHBA-2022:0986