Description of problem:
During migration to OVN on SR-IOV env after FFU the VMs with VF(direct) ports became not pingable. Migration process itself completed successfully and normal ports were pingable. Note, the issue did not happen when I ran OVN migration on a freshly installed SR-IOV env.
Version-Release number of selected component (if applicable):
Tried once and the issue occurred
Steps to Reproduce:
1. Install OSP13 SR-IOV environment with ML2OVS mechanism driver
2. Perform FFU to OSP16.1
3. Create VM instances with normal and VF(direct) SR-IOV ports on each compute node. Create floating ip for each VM.
4. Perform OVN migration procedure.
5. Verify that all VMs are pingable via floating IPs.
normal VMs are pingable - CORRECT
VMs with VF ports are not pingable - BUG
All VMs are pingable diring and after OVN migration procedure
We looked with Rodolfo with Lucas' help at the environment and currently OVN doesn't support N/S traffic with SRIOV + VLAN tenant network: https://bugs.launchpad.net/neutron/+bug/1875852
We can use this BZ to track the limitation if we want to fix it in OSP. There is probably nothing to do in networking-ovn, the work should be done in core-OVN side.