Template:FAQ:Coding 13
From Net-SNMP Wiki
Remember that 'mib2c'
generates a template for the MIB implementation.
It doesn't fill in all the details for you. In particular, it cannot
know how to obtain the information needed to answer particular queries.
That's the job of the MIB module programmer (you!) - See the previous
question for how to proceed.
Essentially mib2c handles the syntax of the MIB implementation, leaving you to concentrate on the semantics.