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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.

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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/.2011/huaweiMgmt/hwEthernetPort/.6/hw10GEOpticsModuleInformationTable/hw10GEOpticsModuleInformationEntry/hw10GEOpticsMDConnector

hw10GEOpticsMDConnector

OBJECT-TYPE

1.3.6.1.4.1.2011.5.14.6.3.1.6

Access

read-only

Status

current

Source

HUAWEI-ETHERNET-OPTICMODULE-MIB

Sub-identifiers

Description

Indicate the type of 10GE optical module connector. Options: 1. unknown(0) -unknown the type of 10GE optical module connector 2. sc(1) -the type of 10GE optical module connector is sc 3. style1Connector(2) -the type of 10GE optical module connector is style1Connector 4. style2Connector(3) -the type of 10GE optical module connector is style2Connector 5. bnctnc(4) -the type of 10GE optical module connector is bnctnc 6. channelCoaxial(5) -the type of 10GE optical module connector is channelCoaxial 7. fiberJack(6) -the type of 10GE optical module connector is fiberJack 8. lc(7) -the type of 10GE optical module connector is lc 9. mtrj(8) -the type of 10GE optical module connector is mtrj 10. mu(9) -the type of 10GE optical module connector is mu 11. sg(10) -the type of 10GE optical module connector is sg 12. opticalPigtail(11) -the type of 10GE optical module connector is opticalPigtail 13. hssdc(20) -the type of 10GE optical module connector is hssdc 14. copperPigtail(21) -the type of 10GE optical module connector is copperPigtail 15. invalid(-1) -invalid value

Syntax

INTEGER { unknown(0), sc(1), style1Connector(2), style2Connector(3), bnctnc(4), channelCoaxial(5), fiberJack(6), lc(7), mtrj(8), mu(9), sg(10), opticalPigtail(11), hssdc(20), copperPigtail(21), invalid(-1) }