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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 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.