Administering MIB files

A Management Information Base (MIB) is defined as a database of management information called managed objects that represent a specific resource. A MIB is used and maintained by a network management protocol such as SNMP. The values of the MIB object can be changed or retrieved using SNMP commands. MIBs can also be used to translate values from SNMP traps.

Object Identifiers (OIDs) are used to identify managed objects within a MIB hierarchy. Each OID is a unique value that consists of a long sequence of numbers separated by periods (.). OIDs follow strict structure, similar to that of the directory structure of a file system.
  • The top level is always root.
  • The level below root is ISO, represented by the number 1.
  • The level below ISO is ORG, represented by the number 3.
  • The level below ORG is DOD, represented by the number 6.
Top level MIB OIDs belong to various standards organizations. Vendor define their own private branches of OIDs for their products. The following table shows the OID hierarchical structure:
OID value Level
1 iso
1.3 org
1.3.6 dod internet directory mgmt experimental private enterprise security SNMPv2 mail features