AFM DNS Lookup Process

Hi,

 

I'm looking for an answer to what I assume is a fairly simple question, however I can't seem to find the answer.

 

We are using the AFM module and would like to use DNS names in the rules that we create.

 

What I want to know is, what is the retry timer on failed DNS lookups, for example. If I create a rule using a DNS hostname that does not resolve, how long will it take for the F5 to retry that DNS name to see if there is a valid entry.

 

The reasoning behind this is we are migrating servers behind the F5 and I would like to add the firewalling before the IP allocation for the servers has been complete, and I want to know that the firewall rules will start working once the server has been given it's new name/ip address.

 

Thanks