MIB compilation

[kbsenthilkumar]

what is the advantage of loading MIBs into NMS ? If I want to read the value of particular OID is it ok to use the that particular OID or I have to load the MIB.

How the NMS reads the interface type from MIB for a particular value of ifType?

[nhabib]

The advantage of loading MIBs into NMS is that the OIDs will be translated from numbers to words.

For example, the NMS would map 1.3.6.1.2.1.2.2.1.3 to ifType

[kbsenthilkumar]

Thank You.

when MIB is loaded into the NMS how it is organized? In a tree structure ?

How the NMS finds a particular OID from that structure?

[Joe Clarke]

The MIB structure is a logical tree, and most MIB parsers use a tree data structure to represent it in memory. The internal tree choice and implementation of a specific NMS dictate exactly how an OID is resolved to an object name (e.g. breadth-first search, depth-first search, etc.).

Regardless, each branch of the tree has a numerical identifier, and MIBs map those identifiers to a textual name. For example, 1.3.6.1.2.1.2.2.1.3:

iso (1)

org (3)

dod (6)

internet (1)

mgmt (2)

mib-2 (1)

interfaces (2)

ifTable (2)

ifEntry (1)

ifType (3)

You can use tools such as http://jaguar.ir.miami.edu/~marcus/snmptrans.html to help visualize this tree.