DNS listeners, DNS Express & BIND

Thanks both for the help. Agreed, that's a good article, unfortunately it's also what lead to my further questions.

I don't believe this problem is a load balancing one; the decision logging looks correct. I only encounter these timeouts when BIND is disabled, unhandled query actions is set to drop, or both.

With BIND enabled I get an immediate resolution.

Regardless of whether BIND is enabled or not statistics suggest the record is served out of DNS Express.

BIG-IP is version 13.0