Lync client failover timing question

Ryan, this is what we found as well. This issue (or at least one of them) is the web services are going through the VIP and the client is talking to the server. When the server is powered off, the client gets RST from the LTM, but they don't seem to get killed from the Lync server, or at least it seemes they wait an extremely long time before finally doing a DNS lookup for the other pool members.

 

This spawns a few questions; is there a way to tune the client to identify the server down condition quicker (when talking to the server) and switchover. As well, why can't the server always present the VIP to the client, I think OCS did this and that configuration worked fine with the LTM's. Is there a way to get the developers that wrote the application guide and the microsoft developers on a call to get a definitive answer as no one is giving us the true answer as to what works and what doesn't. Finally and the most important, what should the failover timeout be from a client perspective when a server goes down? It seems to be around 2 minutes in RR DNS and 1 min 30 with the LTM's.

 

 

Cheers

 

 

Bob James

 

 

Ps

 

 

 

Is there a work around to send it back to F5, do they present names to the client, if so can we use host files on the client pointing the host names to the VIP?