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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.

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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/.1166/.1/apex/.100/apexAlarmServiceInError

apexAlarmServiceInError

OBJECT-TYPE

1.3.6.1.4.1.1166.1.31.100.8026

Access

read-only

Status

current

Source

APEX-MIB

Sub-identifiers

Description

Alarm Service In Error. 'major' indicates that one or more services is in error (unable to fully continue processing). However, this is only for very specific errors where the error could be caused by either the input stream being invalid or another command along with the input stream is causing the error. For example, if mapping an input service to an output and that PMT is not referenced in the PAT, or the number of PIDs in the PMT is greater than the number of PIDs supported, then the command is in error. This error condition would be cleared if a new PAT is received referencing the PMT or in the other case, if a new PMT is received referencing a valid number of PIDs. Refer to apexOutputProgramRoutingStatus for more information. This alarm occurs on the first error. It is not issued for additional errors. It is cleared when all errors are cleared.

Syntax

INTEGER { ok(1), indeterminate(2), warning(3), minor(4), major(5), critical(6) }