(1) An extension to an SNMP agent that permits a user to dynamically add, or in some cases replace, management variables in the local MIB, thereby providing a means of extending the range of information that network managers may access.
(2) An agent that the coordinator agent enlists to speed up SQL processing. See also coordinating agent.
(3) A logical grouping of bundles and services on the common agent. An application uses a subagent to perform actions on a system where the common agent is installed. See also agent, bundle, common agent.