Forum Discussion
The way I resolved this issue myself was to create an internal and external wide IP for the same service, and point them to separate pools.
For example with internal DNS, I have a subdomain pointed to the F5 DNS appliances - gslb.company.ca - and the same subdomain set up for the exteral DNS provider - gslb.company.ca.
On the DNS appliances I set up two wide IPs - mail.int.gslb.company.ca for the internal DNS resolution and mail.ext.gslb.company.ca for the external DNS resolution.
Internally in DNS I have a CNAME record that points mail.company.ca to mail.int.gslb.company.ca. Externally in DNS I have a CNAME record that points mail.company.ca to mail.ext.gslb.company.ca.
There may be different way to set this up using topology records and such but this is a simple solution and works well for me.
Thanks alot for your reply, i have decided to merge internal & external in on box GTM, using different DNS is quite confusing..
Thanks again