The server performs monitoring actions through SNMP. SNMP is a protocol used to exchange data about network activity. With SNMP, data travels between a managed device and a network management station (NMS). A managed device is anything that runs SNMP: hosts, routers, your web server, and other servers on your network. The NMS is a machine used to remotely manage that network. Usually, the NMS software will provide a graph to display collected data or use that data to make sure the server is operating within a particular tolerance.
The NMS is usually a powerful workstation with one or more network management applications installed. A network management application such as HP OpenView graphically shows information about managed devices such as your web servers. For example, it might show which servers in your enterprise are up or down, or the number and type of error messages received. When you use SNMP with the Sun Java System Web Server, this information is transferred between the NMS and the server through the use of two types of agents, the subagent and the master agent.
The subagent gathers information about the server and passes the information to the server’s master agent. Every Sun Java System Web Server except for the Administration Server has a subagent.
After making any SNMP configuration changes, you must click the Save button, then restart SNMP subagent.
To change settings for the configuration, perform the following tasks:
Click theConfigurations tab.
Select the configuration for which you need to change monitoring settings.
Click theMonitoring Settings sub tab.
To change general monitoring settings for a configuration, edit the values under the General Settings section. The following table provides the field description of general monitoring parameters:
Table 13–2 Field Description > General Monitoring Settings
To change SNMP subagent settings for a configuration, edit the values under the SNMP Subagent Settings section. The following table provides the field description of SNMP Subagent parameters:
Table 13–3 Field Description > SNMP Subagent Settings