NetApp
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.
About this task 
If your storage system is running Data ONTAP versions earlier than 7.3.2, the left pane displays FCP as the Fibre Channel protocol, and if your storage system is running Data ONTAP 7.3.2 or later, FC/FCoE is displayed.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Configuration > Protocols, and then click the Fibre Channel protocol.
3.
Click Edit.
4.
Type the new name and click OK.
Related reference 
FC/FCoE window