An administrator’s Unity system is configured with both a Fibre Channel CNA and a Fibre...

Only one FC port can be configured and used for synchronous replication. Once an FC port is assigned, it will continue to act as the synchronous replication port and can never be changed. To determine the FC port used for synchronous replication, in the CLI console, run the command /remote/sys show -detail. Port information, similar to the following example, will appear in the output:

Synchronous FC ports = spb_fc4, spa_fc4

References: https://www.dellemc.com/en-us/documentation/unity-family/unity-p-replication-config/03-unity-rep-br-considerations-syncrep.htm