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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/.2011/.6/hwXponCommonMIB/.1/.1/.5/hwXponOntEthernetPortOpticalStaticInfoTable/hwXponOntEthernetPortOpticalStaticInfoEntry/hwXponOntEthernetPortOpticalGEComplianceCodes

hwXponOntEthernetPortOpticalGEComplianceCodes

OBJECT-TYPE

1.3.6.1.4.1.2011.6.145.1.1.5.13.1.11

Access

read-only

Status

current

Source

HUAWEI-XPON-COMMON-MIB

Sub-identifiers

Description

Indicate the 1G ethernet transceiver type. Options: 1. en1000BASET(1) -Ethernet transceiver type is 1000BASE-T 2. en1000BASECX(2) -Ethernet transceiver type is 1000BASE-CX 3. en1000BASELX(3) -Ethernet transceiver type is 1000BASE-LX 4. en1000BASESX(4) -Ethernet transceiver type is 1000BASE-SX 5. enMULTILX(5) -Ethernet transceiver type is 100BASE-LX&1000BASE-LX 6. en100BASELX(6) -Ethernet transceiver type is 100BASE-LX 7. en100BASEFX(7) -Ethernet transceiver type is 100BASE-FX 8. en1000BASEBX(8) -Ethernet transceiver type is 1000BASE-BX 9. en1000BASEPX(9) -Ethernet transceiver type is 1000BASE-PX 10. en100BASEBX(10) -Ethernet transceiver type is 100BASE-BX 11. invalid(-1) -Indicates that the query fails or no information is detected

Syntax

INTEGER { en1000BASET(1), en1000BASECX(2), en1000BASELX(3), en1000BASESX(4), enMULTILX(5), en100BASELX(6), en100BASEFX(7), en1000BASEBX(8), en1000BASEPX(9), en100BASEBX(10), invalid(-1) }