Very Slow Application performance behind F5

@pagema1: note that if it were DNS related it wouldn't affect the ACK coming back from the server at layer 4. The look up that I am referring to happens up the stack on the server side (usually a domain suffix list that is being traversed) and would very likely be a call off-box from the server to some remote system. Speaking of that, have you done a capture on the server side to see what is going on? That would be a solid data point to have if you've not done so already.

 

 

The fact that you're seeing a consistent 9 second delay really sounds like an "other connection" timeout of some sort (DNS or not).

 

 

-Matt