Re: Mapping of the MODULE-IDENTITY value

>>>>> Mark Ellison writes:

Mark> When is it necessary for the other OBJECT IDENTIFIER values
Mark> assigned within the module to be unrelated to the OBJECT
Mark> IDENTIFIER value of the MODULE-IDENTITY macro?

The prominent example is the IF-MIB. The OID structure (without the
details) looks as follows. 

--internet(1.3.6.1)
  |
  +--mgmt(2)
  |  +--mib-2(1)
  |     +--interfaces(2)
  |     |  +--ifTable(2)
  |     +--ifMIB(31)
  |        +--ifMIBObjects(1)
  |        |  +--ifXTable(1)
  |        |  +--ifStackTable(2)
  |        |  x--ifTestTable(3)
  |        |  +--ifRcvAddressTable(4)
  |        +--ifConformance(2)
  |           +--ifGroups(1)
  |           +--ifCompliances(2)
  +--snmpV2(6)
     +--snmpModules(3)
        +--snmpMIB(1)
           +--snmpMIBObjects(1)
              +--snmpTraps(5)

The OID of the MODULE-IDENTITY ifMIB is { mib-2 31 } and the reason
for this is that many definitions in the IF-MIB predate the SMIv2.
There might be other reasons for these kind of constructions.

/js

-- 
Juergen Schoenwaelder    <http://www.informatik.uni-osnabrueck.de/schoenw/>