In a patent-pending process called autodiscovery, CloudBridge units detect each other's presence automatically. The appliances attach TCP header options to the first packets in each connection: the SYN packet (sent by the client to the server to open the connection), and the SYN-ACK packet (sent by the server to the client to indicate that the connection has been accepted). By tagging the SYN packets and listening for tagged SYN and SYN-ACK packets, the appliances can detect each other's presence in real time, on a connection-by-connection basis.
The main benefit of autodiscovery is that you do not have to reconfigure all of your appliances every time you add a new one to your network. They find each other automatically. In addition, the same process allows autoconfiguration. The two appliances use the TCP header options to exchange operating parameters, including the bandwidth limits (in both the sending and receiving directions), the basic acceleration mode (hardboost or softboost), and the acceptable compression modes (disk, memory, or none). All of the information that each appliance needs about its partner is exchanged with each connection, allowing per-connection variations (for example, per-service-class variations in the allowable compression types).
The connection is accelerated, and the acceleration is transparent to the client, server, routers, and firewalls.