If the connection is idle for more than a specified time period, then the client entry is removed from the table. The next request from that client can be sent to any server in the cluster. The active router uses IP over IP tunneling to send packets to Web servers. The tlclusterd daemon configures the tunneling device on the master. Tunneling devices on Web servers must be configured manually.
Web servers respond to client requests by sending response packets directly to clients.
Responses do not pass through the master. This improves performance, since traffic from servers to clients is usually much larger than traffic from clients to servers. The master balances the load between Web servers. Each time a client requests a connection, the master selects the most suitable server to process the request. Server is selected via a scheduling algorithm.