GTM Split-Brain DNS Setup

So in case anyone else comes along and looks at this. Here is the answer.

The trick is to have multiple virtual servers configured on the LTM say

domain.com_internal = 192.168.100.2

domain.com_external = 208.x.x.2

Both use the same pool of servers and health monitors.

Then you have to go to DNS>GSLB>Pools and create a Pool one with the external virtual servers and the other with the internal virtual servers. The pools should reflect the difference as well.

Then follow these instructions when using the F5 to resolve DNS. https://support.f5.com/kb/en-us/solutions/public/14000/400/sol14421.html

Works like a champ.

thanks,

Robert