NetApp
Configuration > Network > DNS : Managing DNS : Adding or editing the DNS domain name
Adding or editing the DNS domain name
You can use the Edit DNS Settings dialog box to add or modify the DNS domain name of your storage system.
Steps 
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Configuration > Network > DNS.
3.
Click Edit.
4.
In the DNS domain name and the DNS search domains boxes, type or modify the DNS domain name and the DNS search domain name.
5.
In the IP address box, type the IP address of the name server and click Add.
You can add up to three name server IP addresses.
6.
Click Save and Close.