Sorry, Paul - this is nothing to do with scalar instances,
or the difference between "snmpget" and "snmpwalk"
It's down to the particular MIB object(s) involved

> If I an snmpwalk -O n (blah blah), it returns: 
>     .1.3.6.1.2.1.1.2.0 = OID: .1.3.6.1.4.1.8072.3.2.3

In other words:

        SNMPv2-MIB::sysObjectID = NET-SNMP-TC::solaris

which means
   "The identify of this particular agent is a solaris
    version of the Net-SNMP agent"

Note that the *value* NET-SNMP-TC::solaris is associated
with a particular MIB object (SNMPv2-MIB::sysObjectID)

But:

> snmpget -v 1 -c public -m ALL localhost 1.3.6.1.4.1.8072.3.2.3
> Reason: (noSuchName) There is no such variable name in this MIB.

NET-SNMP-TC::solaris does not have a value associated with it.
It is *not* a MIB object itself - it's simply a "named value".

Compare the two MIB definitions:

    sysObjectID OBJECT-TYPE
        SYNTAX  ....
            ::= { system 2 }

    solaris  OBJECT IDENTIFIER ::= { netSnmpAgentOIDs 3 }

They are very different styles of definition.
Only OBJECT-TYPE definitions have a value associated with them.

As far as "snmpget" and friends are concerned, you can ignore
anything other than OBJECT-TYPE definitions.


Dave



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