Check The System - IBM Storwize V7000 Unified Manual

Check the system

For each node canister, check that Fibre Channel port 1 can see one file module
and that it is different from the one seen on Fibre Channel port 2
About this task
The update to NAS checker utility (up2nas) checks this for you.
To check the Fibre Channel connects for each node canister:
v Select Settings > Network > Fibre Channel panel of the Storwize V7000
v From View connectivity for: , choose Nodes from the dropdown menu, and
v Select Show Results
v Local Port 1 should have only 1 line in results table.
v Local Port 2 should have only 1 line in results table.
v These lines should have Type = Unknown
v The same file module is connected to both ports of a node canister, if the remote
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IBM Storwize V7000 Unified: Adding Storwize V7000 File Modules to an existing Storwize V7000 system 2073-720
management GUI.
then the node (such as node1) from the second dropdown menu
WWPN connected to local port 1 is one away from the remote WWPN
connected to local port 2, on both node canister in IO group 0.