How to maintain user session in F5 LTM

Hi Expert

 

Is there a way in F5 LTM to main user session for web portal? Basically I have 3 IIS node in my pool. I want to maintain user session when get redirect to new member in the pool. Currently I'm using Source ip address as sticky persistence but somehow my users need to re-login when F5 redirect to different node in the pool when initial node the user connected is down. I would like to maintain user session although it get redirect to new member in pool. I don't want my users to re-login into the portal.

 

Any advice or guide highly appreciate.