You should assign the SVP the same type of IP addresses (IPv4 or IPv6) as those used on the storage system. You must also configure the client computers with the same IP version that you assign to the SVP. In addition, use the same communication options for the management client and the SVP. If the SVP uses IPv6, you must configure the management clients to use IPv6 for communication.
If you use IPv6 to display the Device Manager - Storage Navigator main window when both IPv4 and IPv6 are available, IPv6 addresses are displayed in the Device Manager - Storage Navigator secondary window but IPv4 communication is actually used.