SNMP Overview

The Sun Management Center server uses SNMP to communicate with the Sun Management Center agents. SNMP also communicates with the other server components, such as the Topology manager, Configuration manager, Event manager, and Trap handler. By contrast, the Sun Management Center server uses remote method invocation (RMI) to communicate with the Sun Management Center consoles.

The SNMP port definitions for Sun Management Center components are defined in two files:

• The /var/opt/SUNWsymon/cfg/domain-config.x file exists in every machine running any Sun Management Center component

• The /var/opt/SUNWsymon/cfg/server-config.x file exists on machines that have the Sun Management Center server component installed

The domain-config.x file contains one configuration block for each of the SNMP-based Sun Management Center agents. Each configuration block contains at least one line that defines the port address for the corresponding agent. The default port definition for the Sun Management Center server is in the server-config.x file.

You can manually add hosts with Sun Management Center agents that use port addresses other than 161 to the administrative domain through the Create Topology Object window. Alternatively, you can discover these hosts automatically by specifying the port number in the discovery parameters. For more information about the Create Topology Object window, see Chapter 3, Manually Adding Objects to the Topology Database, in Sun Management Center 3.6.1 User’s Guide. For more information about how hosts are discovered automatically, see Chapter 4, Adding Objects to the Topology Database Using the Discovery Manager, in Sun Management Center 3.6.1 User’s Guide. Because you can only specify one port number in addition to port 161, you must select an alternate port number and use that number for all agent installations.