Session replication is useful when a client directly connects to a load balancer which in turn connects to ActiveTransfer Server. Session replication enables you to configure replication of an ActiveTransfer client session that is in progress on one node, across all other ActiveTransfer Server nodes in the group. A client connected to one ActiveTransfer Server in a group is valid on all other ActiveTransfer Servers in the group. So, if one ActiveTransfer Server goes down, the client is directed to another ActiveTransfer Server in the group and any in-progress file transfers can continue without the need for a client re-login. For configuration details, see Configuring Session Replication in ActiveTransfer Servers.

Note that session replication is not required if the client connects directly to the ActiveTransfer Gateway which routes the requests to ActiveTransfer Server. In this case, ActiveTransfer Gateway automatically handles session replication between ActiveTransfer Servers.