Datalogic Scanning 4420 - Manual (Page 123)

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 man-
agement program (client) issues queries and commands to the remote device
(agent/server). The protocol itself defines a number of variable types and struc-
tures, and the rules for using them for data transfer. Using these variable types
and rules, there are a number of standard variables that are supported by all
SNMP agents. These standards include network addressing (IP address, sub-
net 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 func-
tion is selected, SNMP is used to query the Terminal for its current Configura-
tion settings, as well as current status information such as battery status and
memory usage. In the same function, SNMP is used to update Terminal Con-
figuration settings when directed to. SNMP is also used by the FMU Servers
to perform the automated Group Configuration update. The Server issues
SNMP queries to discover the current Terminal Configuration, 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 avail-
able, depending on the information being managed.