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5.Configuring the FieldServer as a SNMP Server/Agent
For a detailed discussion on FieldServer configuration, please refer to the FieldServer Configuration Manual. The information that follows describes how to expand upon the factory defaults provided in the configuration files included with the FieldServer. (See “.csv” sample files provided with the FieldServer).
This section documents and describes the parameters necessary for configuring the FieldServer to communicate with a SNMP Client such as a Network Management application. Please refer to Appendix A: for a discussion of how to configure SNMP TRAPS.
The configuration file tells the FieldServer about its interfaces, and the routing of data required. In order to enable the FieldServer for SNMP communications, the driver independent FieldServer buffers need to be declared in the “Data Arrays” section, the FieldServer virtual Node(s) needs to be declared in the “Server Side Nodes” section, and the data to be provided to the clients needs to be mapped in the “Server Side Map Descriptors” section. Details on how to do this can be found below.
Note that in the tables, * indicates an optional parameter, with the bold legal value being the default.
5.1.Server Side Data Arrays
A special Data Array naming convention is used to map FieldServer Data Arrays into the SNMP OID addressing scheme. Any data arrays that are to be visible via SNMP have to be named in the following way:
Data_Arrays |
|
|
Data_Array_Name, | Data_Format, | Data_Array_Length |
SNMP_DA_1, | Int, | 20 |
SNMP_DA_2, | Float, | 20 |
The Data_Format and Data_Array_Length may be freely chosen, but the name has to be in the format SNMP_DA_x, where x is sequential from one Data Array to the next. The corresponding entries in the automatically generated MIB file would appear as shown below.
SNMP_DA_1 appears in the MIB thus:
dataArray1 OBJECT IDENTIFIER ::= { snmp_server_v1_00a 1 }
The first data value in SNMP_DA_1 appears in the MIB thus (note Integer Data Type): dataValue1_0
SYNTAX INTEGER
DESCRIPTION "Data value."
::= { dataArray1 0 }
The resulting OID for this data value is 1.3.6.1.4.1.6347.1.1.0.
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