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What's a MIB?

A MIB (Management Information Base) is a structured document that defines the data a device exposes over SNMP — things like interface counters, system uptime, or CPU load. Each module declares a set of named objects, organized into a tree.

What's SNMP?

SNMP (Simple Network Management Protocol) is how network devices — routers, switches, servers — report status and statistics to monitoring tools. It's the protocol; MIBs are the vocabulary it uses to describe what's being asked for.

What's an OID?

An OID (Object Identifier) is the numeric address of one piece of data in a MIB — a dotted sequence like 1.3.6.1.2.1.1.1, read from the root of a global tree down to one specific object. Names are easier to read; OIDs are what's actually sent over the wire.

Try it: sysDescr (1.3.6.1.2.1.1.1) →

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iso/org/dod/internet/private/enterprises/.9/.9/.599/.1/.3/cldcClientTable/cldcClientEntry/cldcClientReasonCode

cldcClientReasonCode

OBJECT-TYPE

1.3.6.1.4.1.9.9.599.1.3.1.1.37

Access

read-only

Status

current

Source

CISCO-LWAPP-DOT11-CLIENT-MIB

Sub-identifiers

Description

unspecified - Unspecified. previousAuthNotValid - Previous Authentication was not valid. deauthenticationLeaving - Leaving due to deauthentication. disassociationDueToInactivity - Disassociation due to Inactivity. disassociationAPBusy - Disassociation since AP was busy. class2FrameFromNonAuthStation - Class 2 frame from non authenticated station. class2FrameFromNonAssStation - Class 2 frame from non associated station. disassociationStaHasLeft - Station has left due to disassociation. staReqAssociationWithoutAuth - Station send association request without authentication. invalidInformationElement - Invalid information element. groupCipherInvalid - Invalid group Cipher. unicastCipherInvalid - Invalid unicast cipher. akmpInvalid - Invalid AKMP. unsupportedRsnVersion - Unsupported RSN version. invalidRsnIeCapabilities - Invalid RSN IE capabilities. cipherSuiteRejected - Cipher suite rejected. missingReasonCode - Reason code is missing. maxAssociatedClientsReached - Maximum allowed associated client number has reached. maxAssociatedClientsReachedOnRadio - Maximum allowed associated client number has reached on radio. maxAssociatedClientsReachedOnWlan - Maximum allowed associated client number has reached on wlan. unSpecifiedQosFailure - Unsupported QOS failure. qosPolicyMismatch - Mismatch on QOS policy. inSufficientBandwidth - Insufficient bandwidth. inValidQosParams - Invalid QOS parameters.

Syntax

INTEGER { unspecified(1), previousAuthNotValid (2), deauthenticationLeaving (3), disassociationDueToInactivity (4), disassociationAPBusy (5), class2FrameFromNonAuthStation (6), class2FrameFromNonAssStation (7), disassociationStaHasLeft (8), staReqAssociationWithoutAuth (9), invalidInformationElement(40), groupCipherInvalid (41), unicastCipherInvalid (42), akmpInvalid (43), unsupportedRsnVersion (44), invalidRsnIeCapabilities(45), cipherSuiteRejected(46), missingReasonCode (99), maxAssociatedClientsReached(101), maxAssociatedClientsReachedOnRadio(105), maxAssociatedClientsReachedOnWlan(106), unSpecifiedQosFailure(200), qosPolicyMismatch(201), inSufficientBandwidth(202), inValidQosParams(203) }