When a single backend server is used, then we are able to access web interface with no errors.
When multiple servers are bound to LB VIP, we receive state error :"There is a problem with your session. For security reasons, you must close your browser window and log on again to continue accessing your resources.To log on again, you must restart your browser."
After setting Persistence to SourceIP and setting time to 1440, we are able to access web interface when multiple servers are bound to Load Balancer VIP.
Persistency was not maintained.