Hirschmann MACH 4000 Series, User Manual

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General Information
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B.3 Management Information BASE MIB
Basic - L3P
Release 3.1 06/07
B.3 Management Information
BASE MIB
The Management Information Base (MIB) is designed in the form of an ab-
stract tree structure.
The branching points are the
object classes . The “leaves” of the MIB are
called generic object classes .
Wherever necessary for unambiguous identification, the generic object clas-
ses are
instantiated , i.e. the abstract structure is imaged on the reality, by
specifying the port or the source address.
Values (integers, time ticks, counters or octet strings) are assigned to these
instances; these values can be read and, in some cases, modified.
The object description or the object ID (OID) identifies the object class.
The subidentifier (SID) is used for instantiation.
Example:
The generic object class
hmPSState (OID = 1.3.6.1.4.1.248.14.1.2.1.3)
is the description of the abstract information “power supply state”. However,
it is not possible to read any information from this, as the system does not
know which power supply is meant.
Specification of the subidentifier (2) images this abstract information onto
reality (instantiates it), which means that it refers to power supply 2. A value
is assigned to this instance and can then be read. The instance “get
1.3.6.1.4.1.248.14.1.2.1.3
.2”, for example, returns the response
“1”, which means that the power supply unit is ready for operation.
The following abbreviations are used in the MIB:
Comm Group access rights
con Configuration
Descr Description
Fan Fan
ID Identifier
Lwr Lower (e.g. threshold value)
PS Power supply
Pwr Power