Properties of the Virtual Service include the Generic Type and also provide Remote Terminal specific options.

Persistence

If the terminal servers support a Session Directory, the LoadMaster will use the "routing " supplied by the Session Directory to determine the correct host to connect to. The LoadMaster persistency timeout value is irrelevant here - it is a feature of the Session Directory.

Note: The switch "IP address redirection" in the Session Directory configuration must not be selected for this to work.

Using Session Directory with LoadMaster is optional, in terms of persistence. If the client pre-populates the username and password fields in the initial request, then this value is stored on the LoadMaster. As long as these fields are still populated upon reconnect, the LoadMaster will look up the name and reconnect to the same server as the original connection. The persistence timeout is used to limit the time the information is kept on the LoadMaster.

If using Terminal-Service or Source IP mode, then if neither of these two modes succeeds, then the source IP address is used for persistency.

Service Check for the Virtual Service

Only three options are available; ICMP, TCP and RDP. Remote Terminal Protocol (RDP) opens a TCP connection to the Real Server on the Service port (port 3389). The LoadMaster sends an a1110 Code (Connection Request) to the server. If the server sends an a1101 Code (Connection Confirm) then LoadMaster closes the connection and marks the server as active. If the server fails to respond within the configured response time for the configured number of times, or if it responds with a different status code, it is assumed dead.