NetApp
7-mode/HA pair/V-Series : Configuration : Network : DNS : Configuring DNS : Enabling and disabling DNS

Enabling and disabling DNS
You can use the Edit DNS Settings to enable and disable DNS on a storage system. DNS is disabled by default.
Steps 
1.
From the Home tab, double-click the appropriate storage system to display a subtree of management features.
2.
Click Configuration > Network > DNS.
3.
Click Edit.
4.
Select the Enable DNS check box and click OK or clear the Enable DNS check box and click OK.