Cisco® Router Configuration & Troubleshooting, Second Edition

Management Information Base (MIB)

There are a number of commercial and publicly available applications that use SNMP to access the Management Information Base, or MIB, for an SNMP enabled device. The MIB contains a great deal of information about the device itself and each of the individual interfaces on the device. There are basically two types of data fields stored in the MIB:

• Read-only fields

• Read-write fields

Access to read-only and read-write MIB variables is controlled through the use of a password called the community string. The community string for the read-only variables can be different than the community string for the read-write variables. The community string to access each type of variable can be any ASCII string. Typically, ...