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

SVC port connexion to SAN SW

https://www.ibm.com/support/pages/troubleshooting-svcstorwize-npiv-connectivity

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 (vWWPN) port from storage to SVC physical port (pWWPN)
• For node inter-connection use also pWWPN only.
• For hosts, use vWWPN with SCSI or NVMe protocols.

Before configuring all nodes, wait:

• Configure the first node as a cluster node
• Start the other nodes
• Do the private zoning
• All other nodes started 'll be candidates (if they are still configured, go to the GUI and do a remove node)
• Add the candidates nodes to the cluster
• configure ALL service IP (on each node)
• Download and install the IP quorum
• Create the zoning for the external storage (controllers)

Now you are ready to configure the Enhanced Stretch Cluster