[SNMP4J] Help with MIB Design

[Jothi P Neelamegam]

Hi All,

This is not a SNMP4J question per se, but thought that is still a good 
place to post to get some advice.

I am in the process of designing a MIB. Our agent will need to expose 
information from two modules (say Module_A and Module_B). I have a table 
for Module_A with the following columns
Indx
Data1
Data2

I was planning to add an augmented table for Moudle_B with the following 
columns
Data3
Data4

with indx being the index of this table as well.

The issue is that Module_B is an optional module in our product and 
might or might not exist. In other words, the agent might have Data3 and 
Data4 or might not have it. What is a good way to architect this?

If I use the augmented table approach above, will the agent need to 
return empty values (or some values indicating _not_available_) for 
Data3 and Data4 for the case where Module_B is not present? I could have 
a scalar to indicate whether Module_B is present or not and then let the 
NMS interpret the values of Data3 and Data4 based on this value. Is this 
a good idea?

Any suggestions/advice would be helpful.

Thanks in advance.
Jothi

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