RAD Data comm Modular Access Device with Integrated Router Snmp Environment, Snmp Principles

Appendix C

SNMP Management

This appendix provides the specific information required for managing FCD-IPM with the Simple Network Management Protocol (SNMP).

C.1 SNMP Environment

This section describes the SNMP environment.

The SNMP management functions of the FCD-IPM are provided by an internal SNMP agent, which can use in-band and out-of-band communication.

The SNMP management communication uses the User Datagram Protocol (UDP). UDP is a connectionless-mode transport protocol, part of the suite of protocols of the Internet Protocol (IP).

This section covers the information related to the SNMP environment.

SNMP Principles

The SNMP management protocol is an asynchronous command/response polling protocol. All of the 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 (that is, events which occurred not in response to a management operation) reported by the managed entity.

SNMP Environment C-1