If you are adding one of the storage systems from a high-availability pair, the partner node is automatically added to the list of managed systems. If a high-availability partner node is down, you can add the working storage node.
Steps
1.
From the Home tab, click Add to add a storage system.
2.
Type the fully qualified DNS host name, or the IPv4 or IPv6 address of the storage system and click Add.
Result
The storage system or the high-availability pair that you added is included in the list of managed systems.