GTM iRule to enhance Topology Records

Ahh... Should be. However the iRule would probably have to be a GTM iRUle, and not an LTM iRule (They're the same language, but LTM iRules don't have access to the GTM information - e.g. The GTM Pool). GTM rules however are a bit more constrained and don't have access to some of the newer features of iRules.

LTM iRules however have full access to the DNS request & response info, so you can directly alter the data being returned from there.

H