Datalogic Scanning FALCON 4400 SERIES - Manual (Page 92)

SNMP Interface
C-2 Falcon ® 4400 Series with Windows Mobile ®
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.
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 Inter-
net 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 Config-
urations, Terminal power Configurations and Terminal network parameters.
The format of an MIB follows rules laid out in the appropriate standards,
allowing the manufacturers of network management tools such as HP Open-
View and CastleRock SNMPc to make use of the MIBs developed by manu-
facturers. So by following the procedures used by the management tool, the
MIB can be processed by the tool allowing the proper display of SNMP values
retrieved from the agent.