XPages on a cluster?

Do XPages session-state data replicate from cluster member to cluster member?

For example:

  1. You’ve got an IP sprayer, sending requests to a cluster with two servers: Server1 and Server2

  2. Somebody’s working with an XPage on Server1 and it dies and they failover to Server 2

  3. Have all their session/application variables, view states, etc. been transferred over to Server 2, so their next browser click just picks right back up where it left off?