BigIP behaving as an intelligent DNS server. Probe before answering.

Hello,

 

I come across a situation where huge data traffic must be balanced between servers, but I do not want the BigIP to suffer from it. (neither I wish an asynchronous routing)

 

Imagine a set of 20 servers, that can be picked by a client, indifferently. DNS Round Robin would be a solution. but if one of the servers is down. DNS server cannot tell.

 

The BIGIP has the intelligence to probe servers (healthmonitor). Probe before answering to a DNS query would be the solution.

 

++ client -> query -> bigIP

 

++ bigIP -> probe -> 20 servers

 

++ 19 servers -> ok > BIgIP

 

++ BigIP -> list of 19 servers -> client

 

Only answering to DNS query would, let the BIgIP out of the real data traffic.

 

From past reading I see that GTM is capable of this. But I believe the BigIP can do this to. The task is actually pretty easy.

 

Any iRule iApp or already written solution to achieve this? Thanking you in advance Alberto