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Product Reference Guide

D-1

Appendix D

SNMP Interface

Overview

SNMP Concepts

Simple Network Management Protocol (SNMP) is a standardized protocol for network

management services using a client/server model. The network management program

(client) issues queries and commands to the remote device (agent/server). The protocol

itself defines a number of variable types and structures, and the rules for using them for

data transfer. Using these variable types and rules, there are a number of standard vari-

ables that are supported by all SNMP agents. These standards include network address-

ing (IP address, subnet mask, etc.), and network statistics (total packets, bad packets,

etc.).

FMU uses Simple Network Management Protocol (SNMP) to perform many of its

functions. When the Terminal Configuration or Terminal Report function is selected,

SNMP is used to query the Terminal for its current Configuration settings, as well as

current status information such as battery status and memory usage. In the same func-

tion, SNMP is used to update Terminal Configuration settings when directed to.

SNMP is also used by the FMU Servers to perform the automated Group Configura-

tion update. The Server issues SNMP queries to discover the current Terminal Configu-

ration, then uses SNMP commands to update any Configuration settings that need it.

MIB Files

A Management Information Base (MIB) is a file that defines a set of SNMP variables,

their types and usage. There are a number of standard MIBs available, depending on the

information being managed.

Datalogic MIBs

Beyond the standard values, SNMP allows manufacturers to define their own private

MIBs. For example, Datalogic has been assigned an MIB by the Internet Assigned

Numbers Authority that allows Datalogic to define SNMP values relating specifically to

devices that we manufacture. Within the Datalogic MIB, several categories of values

have been defined including scanner Configurations, Terminal power Configurations

and Terminal network parameters.

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