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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.

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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/.11863/.6/tplinkAclMIB/.1/.3/tpAclActionTable/tpAclActionEntry/tpAclActionQosRemarkDscp

tpAclActionQosRemarkDscp

OBJECT-TYPE

1.3.6.1.4.1.11863.6.26.1.3.1.1.9

Access

read-create

Status

current

Source

TPLINK-ACL-MIB

Sub-identifiers

Description

Specify the DSCP region for the data packets those match the corresponding ACL.

Syntax

INTEGER{ dscp64-noLimit(64), dscp0-be-000000(0), dscp1(1), dscp2(2), dscp3(3), dscp4(4), dscp5(5), dscp6(6), dscp7(7), dscp8-cs1-001000(8), dscp9(9), dscp10-af11-001010(10), dscp11(11), dscp12-af12-001100(12), dscp13(13), dscp14-af13-001110(14), dscp15(15), dscp16-cs2-010000(16), dscp17(17), dscp18-af21-010010(18), dscp19(19), dscp20-af22-010100(20), dscp21(21), dscp22-af23-010110(22), dscp23(23), dscp24-cs3-011000(24), dscp25(25), dscp26-af31-011010(26), dscp27(27), dscp28-af32-011100(28), dscp29(29), dscp30-af33-011110(30), dscp31(31), dscp32-cs4-100000(32), dscp33(33), dscp34-af41-100010(34), dscp35(35), dscp36-af42-100100(36), dscp37(37), dscp38-af43-100110(38), dscp39(39), dscp40-cs5-101000(40), dscp41(41), dscp42(42), dscp43(43), dscp44(44), dscp45(45), dscp46-ef-101110(46), dscp47(47), dscp48-cs6-110000(48), dscp49(49), dscp50(50), dscp51(51), dscp52(52), dscp53(53), dscp54(54), dscp55(55), dscp56-cs7-111000(56), dscp57(57), dscp58(58), dscp59(59), dscp60(60), dscp61(61), dscp62(62), dscp63(63) }