Help on load balance with persistence

Hi All, I am trying following thing We have auth module in which we support multifactor so once first factor done we are sending the Auth-challenge and we are persisting state locally which are needed to send in next request. It working fine with out load balance , with load balance enabled there is possibility that second request once with auth-challenge response will go to other home server and failing since that home server dont have the persistent attributes. is there is any way to send the request which have state parm will go to same home server? or Can we save some attributes which can be used in subsequent request irrespective of home-server. Regards, Shivaprasad