Example of cabling

In the best recommandations, alternate one port on Fabric SAN A, then a port on B…

Set the port mask to 11, so only ports 1 and 2 are able to communicate in node

SVC:superuser>chsystem -localfcportmask 00000011 

SVC:superuser>lssystem |grep mask
local_fc_port_mask 0000000000000000000000000000000000000000000000000000000000000011

Nowadays (2024), storage using NVMe are not supported, only SCSI over FC. Hosts are supported with NVMe over FC, SCSI over FC, … network storage protocols

For storage IBM change the layer at storage array to storage

Zone the FC SCSI NPIV (vWWN) port from storage to SVC physical port (pWWN)

For node inter-connection use also pWWN only.

For hosts, use vWWN with SCSI or NVMe protocols.