messages server 923 becomes aware of the fact that a session exists for token t 1 on server 924 server 923 therefore sends a redirect message to dtu 926 thereafter dtu 926 sends an insert event 928 to server 924 note that part of the message indicates that this is a redirect i e cause u201c redirect u201d thereby bypassing a repeated authentication attempt after collecting tokenr responses from the candidate servers in one embodiment the group manager process on the server that originally received the insert event server 923 chooses a server to which to forward the dtu by choosing the session with the latest time of last connection the group manager then sends a redirect message to the dtu telling it to reconnect to the new server the dtu breaks the connection with the current server reconnects to the new server and sends an insert event with a cause field of u201c redirect u201d the u201c redirect u201d cause prevents the new server from doing the server selection all over again the dtu is connected to the session identified by the token as a security measure one embodiment signs messages broadcast throughout the network for example one embodiment may use a keyed sha1 hash algorithm the key is derived from a local key file on each server which must be identical on all of the servers for the servers to trust each other host messages.