Verifying your network configuration after upgrade
ONTAP 9.8 and later automatically monitors layer 2 reachability. After you upgrade from ONTAP 9.7x or earlier to ONTAP 9.8 or later, you should verify that each .network port has reachability to its expected broadcast domain.
Verify each port has reachability to its expected domain:
network port reachability show -detail
A reachability-status of ok indicates that the port has layer 2 reachability to its assigned domain.