DNS VIP best Practice

Can you provide more details regarding your question? If you want to set up a new VIP then you need a IP address first and then you can create an entry for it on LB.

Hi,

The below article shoulkd answer your query.

Configuring the BIG-IP DNS system to answer TCP or UDP DNS requests (11.x - 12.x)

https://support.f5.com/kb/en-us/solutions/public/14000/900/sol14923.html

Regards,

Mohammed Shiraz Mukram

Do you mean the GTM listener? If yes I would recommend setting it up for both UDP and TCP. Majority of the DNS queries will use UDP 53, but setting the listener to listen on TCP 53 would be a good idea if you have application that just use TCP for DNS queries.