NetApp
Vserver : Configuration > Protocols > FC/FCoE : Managing FC/FCoE : Changing an FC or FCoE node name
Changing an FC or FCoE node name
If you replace a storage system chassis and reuse it in the same Fibre Channel SAN, the node name of the replaced storage system in certain cases might be duplicated. You can change the node name of the storage system by using the Edit Node Name dialog box.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
Ensure that the left navigation pane displays the Vservers hierarchy.
3.
In the navigation pane, select the Vserver and click Configuration > Protocols, and then click the Fibre Channel protocol.
4.
Click Edit.
5.
Type the new name and click OK.
Related reference 
FC/FCoE window