MTV 2.5 was tested only with Red Hat Virtualization (RHV) 4.4 SP1. Migration from Red Hat Virtualization (RHV) 4.3 has not been tested with MTV 2.6.

As RHV 4.3 lacks the improvements that were introduced in RHV 4.4 for MTV, and new features were not tested with RHV 4.3, migrations from RHV 4.3 may not function at the same level as migrations from RHV 4.4, with some functionality may be missing.

Therefore, it is recommended to upgrade RHV to the supported version above before the migration to OpenShift Virtualization.

However, migrations from RHV 4.3.11 were tested with MTV 2.3, and may work in practice in many environments using MTV 2.6. In this case, we advise upgrading Red Hat Virtualization Manager (RHVM) to the previously mentioned supported version before the migration to OpenShift Virtualization.

• • modules/compatibility-guidelines.adoc*

it says "MTV 2.5" at the beginning but it holds for MTV 2.6 as well - we have not tested migrations from RHV 4.3 as it's not supported but basic migrations from RHV 4.3 are supposed to work (or put it differently - we didn't make a change that is expected to break migrations from RHV 4.3)