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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/.738/.10/.6/.5/mplsTeMIB/.1/mplsTunnelTable/mplsTunnelEntry/mplsTunnelGPid

mplsTunnelGPid

OBJECT-TYPE

1.3.6.1.4.1.738.10.6.5.2.1.2.1.43

Access

read-create

Status

current

Source

PRVT-MPLS-TE-MIB

Sub-identifiers

Description

This object indicates the payload carried by the LSP.It is only required when GMPLS will be used for this LSP. Only valid if Generalized Label Request is in use as specified by mplsTunnelLSPEncodingType. This object is only meaningful if mplsTunnelLSPEncoding is not set to 0

Syntax

INTEGER { unknown (0), ds1SF (1), ds1ESF (2), ds3M23 (3), ds3Cbit (4), asyncE4 (5), asyncDS3 (6), asyncE3 (7), bitSyncE3 (8), byteSyncE3 (9), asyncDS2 (10), bitSyncDS2 (11), byteSyncDS2 (12), asyncE1 (13), byteSyncE1 (14), byteSync31DS0 (15), asyncDS1 (16), bitSyncDS1 (17), byteSyncDS1 (18), vcByteSyncDS2 (19), vcAsyncE1 (20), vcByteSyncE1 (21), ds1SFAsync (22), ds1ESFAsync (23), ds3M23Async (24), ds3CbitAsync (25), vt (26), sts (27), pos16CRC (28), pos32CRC (29), posScrambling16CRC (30), posScrambling32CRC (31), atmMapping (32), ethernet (33), sdh (34), sonet (35), digitalWrapper (36), lambda (37), etsiPdh (38), ansiPdh (39), laps (40), fddi (41), dqdb (42), fiberch3 (43), hdlc (44), etherV2di (45), ether8023 (46), etherGfpSonet (56) }