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This article discusses some third-party monitoring tools you can use to monitor applications and ports.
Windows NT Load Balancing Service (WLBS) monitors cluster integrity using the periodic exchange of heartbeats between cluster members. Heartbeat exchange ensures the server is available on the network, but does not include any checking at the port or application level.
You can use third-party monitoring tools to control cluster membership based on content availability. Some tools allow a command to be executed after detecting an application failure at a server. For example, if an application being load balanced on a server fails, the monitoring tool could execute the following command
wlbs stop IPaddress:HostIDwhere IPaddress is the IP address for that cluster and HostID is the host ID or dedicated IP address of that server.
For information about the command line syntax, type wlbs at an MS-DOS prompt.
Some examples of third-party tools that monitor cluster membership are listed in the following table.