Replacing a DNS Server with F5 BIG-IP DNS

Hi Piotr. I probably don't have a great answer for you but I will do my best. Also, it seems as though some of the questions/responses have been mixed together with different use cases. With that, I attempt to never use the Bind Forwarders Server List. It provides no high availability or health checking of what you are performing name resolution against. It has and will likely always be a recommended best practice to use pools when configuring the BIG-IP to act as a recursive DNS server. Also, this isn't documented and may be my own experience though I have experienced times when I expect name resolution attempts to continue down the list of BIND Forwarders and DNS servers in the system general settings though it doesn't and name resolution fails on the first attempt. This behavior was not expected from me so therefor I really like the use of DNS pools with DNS health monitors to validate the members are available. I know this probably isn't what you were looking for but I hope it convinces you to use DNS pools! :)