What is the business rationale for this exception? Is there a specific customer that needs this RFE?
17.1 switched to nftables so backup and restore with NFS will fail as firewall will not be correctly configured. This affects users of backup and restore functionality, including OVN migration

Are there any security concerns?
No

What other functions, teams, or DFGs are impacted by this feature?
Networking DFG Neutron squad (OVN migration uses ReaR)

What is the estimated time to have the upstream work complete and approved?
None, downstream code, already merged

What is the time and resources required to test this issue? On what date will automated tests be written and ready to run and report results in Polarion?
Can be tested with OVN migration automated job

Is there potential doc impact?
No

Are there new packages needed that are not packaged in OSP or RHEL? Does it require newer versions of existing dependencies (dependency bumps)?
No new packages or dependencies.

What is the support level? Tech Preview or fully supported
Full support

How invasive is the code? From very invasive, a core change to very isolated, no risk to other components? Example: Minimal impact (only affects the puppet-cinder module).
Local change in tripleo-ansible, change is in firewall handling for NFS access in backup and restore

What is the impact to deployment/updates/upgrades/FFU; what are the test plans in these areas?
No direct impact (OVN migration can be run for some customers after FFU so may trigger escalations/rollbacks)