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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/.4491/.2/.1/docsQos3Mib/.1/docsQos3ServiceClassTable/docsQos3ServiceClassEntry

docsQos3ServiceClassEntry

OBJECT-TYPE

1.3.6.1.4.1.4491.2.1.21.1.8.1

Access

not-accessible

Status

current

Source

DOCS-QOS3-MIB

Sub-identifiers

Description

The conceptual row of docsQos3ServiceClassTable.

Syntax

DocsQos3ServiceClassEntry

Children (36)