Product and Software: This article applies to all Aruba controllers and ArubaOS versions.
In the WebGUI, navigate to Configuration > IP > DHCP server > edit the Pool > DNS servers. Each entry must be separated by spaces in the format, <primaryip secondaryip>.
In the CLI, issue these commands:
(Config) #ip dhcp pool <pool Name>
(Config-dhcp)#dns-server address1 address2
where address1 is the primary and address2 is the secondary.
Note: A maximum of six DNS IP addresses can be entered.