RAD Data comm IPmux-11 operation manual Snmp Environment, Snmp Principles, Snmp Operations

Appendix C

SNMP Management

This appendix provides specific information for IPmux-11 management by SNMP (Simple Network Management Protocol).

The SNMP management functions of IPmux-11 are provided by an internal SNMP agent. The SNMP management communication uses UDP (User Datagram Protocol), which is a connectionless-mode transport protocol, part of the IP (Internet Protocol) protocol suite.

This appendix covers the information related to the SNMP environment.

C.1 SNMP Environment

SNMP Principles

The SNMP is an asynchronous command-response polling protocol. All management traffic is initiated by the SNMP-based network management station, which addresses the managed entities in its management domain. Only the addressed managed entity answers the polling of the management station (except for trap messages).

The managed entities include a function called an SNMP agent, which is responsible for interpretation and handling of the management station requests to the managed entity, and the generation of properly formatted responses to the management station.

SNMP Operations

The SNMP protocol includes four types of operations:

•getRequest: Command for retrieving specific management information from the managed entity. The managed entity responds with a getResponse message.

•getNextRequest: Command for retrieving sequentially specific management information from the managed entity. The managed entity responds with a getResponse message.

•setRequest: Command for manipulating specific management information within the managed entity. The managed entity responds with a getResponse message.

•trap: Management message carrying unsolicited information on extraordinary events, which are events that occurred not in response to a management operation reported by the managed entity.

IPmux-11 Ver. 2.00 SNMP Environment C-1