In a typical SNMP deployment, many production environments use a network management system (NMS) for a unified monitoring and administrative view of all SNMP-enabled devices. The NMS communicates with a master agent, whose main responsibility is to translate the SNMP protocol messages and multiplex any request messages to the subagent on each managed device (for example, Directory Proxy Server instance, Directory Proxy Server, Data Sync Server, or OS Subagent). The master agent also processes responses or traps from the agents. Many vendors provide commercial NMS systems. Consult with your NMS system for specific information.

The PingDirectoryProxy Server contains an SNMP subagent plugin that connects to a Net-SNMP master agent over TCP. The main configuration properties of the plugin are the address and port of the master agent, which default to localhost and port 705, respectively. When the plugin is initialized, it creates an AgentX subagent and a managed object server, and then registers as a MIB server with the Directory Proxy Server instance. Once the plugin's startup method is called, it starts a session thread with the master agent. Whenever the connection is lost, the subagent automatically attempts to reconnect with the master agent. The Directory Proxy Server’s SNMP subagent plugin transmits only read-only values for polling or trap purposes. (Set and inform operations are not supported). SNMP management applications cannot perform actions on the server on their own or by means of an NMS system.

One important note is that the PingDirectoryProxy Server was designed to interface with a Net-SNMP (version or later) master agent implementation with AgentX over TCP. Many operating systems provide their own Net-SNMP module. However, SMA disables some features present in the Net-SNMP package and only enables AgentX over UNIX Domain Sockets, which cannot be supported by Java. If your operating system has a native Net-SNMP master agent that only enables UNIX Domain Sockets, you must download and install a separate Net-SNMP binary from its web site.