You can run ESXCLI commands to determine the unicast configuration. What to read next View the Communication ModesUsing esxcli vsan cluster get command, you can view the CMMDS mode (unicast or multicast) of the vSAN cluster node. Verify the Cluster HostsUse the esxcli vsan cluster unicastagent list command to verify whether the vSAN cluster hosts are operating in unicast mode. View the Network InformationUse the esxcli vsan network list command to view the vSAN network information such as the VMkernel interface that vSAN uses for communication, the unicast port (12321), and the traffic type (vSAN or witness) associated with the vSAN interface. Parent topic: Using Unicast in vSAN Network