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A MIB (Management Information Base) defines the data a device can report over SNMP — things like interface counters, system uptime, or CPU load — organizing each value under a name and a fixed numeric address. Every MIB module declares a tree of related objects, and a device typically implements dozens of MIBs at once: a handful of universal ones every vendor supports, plus whatever proprietary ones that specific vendor has published.

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SNMP (Simple Network Management Protocol) is how routers, switches, servers, and other network devices report status and statistics back to monitoring tools. It's the transport; MIBs are the vocabulary that gives the data it carries any meaning. Most monitoring platforms — Zabbix, PRTG, LibreNMS, Prometheus's SNMP exporter, and plenty of others — rely on this same underlying protocol and MIB structure.

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An OID is the actual address of one piece of data — a dotted sequence like 1.3.6.1.2.1.1.1, read from the root of a shared global tree down to one specific object. Names are for humans; OIDs are what actually gets sent over the wire. Every vendor's private MIBs live under that vendor's own reserved branch of the same tree, which is what lets one numbering system cover both universal and proprietary data.

Try it: sysDescr (1.3.6.1.2.1.1.1) → Read more →

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SNMP Fundamentals

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Configuring SNMP on Cisco devices

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Configuring SNMP on Fortinet devices

FortiOS's config system snmp syntax for communities, SNMPv3 users, and choosing which events actually generate a trap.

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Signal quality and status OIDs for both the modem and CMTS side, what changed across DOCSIS versions, and how DOCS-IF3/IF31-MIB extend it for bonded and OFDM channels.

Linux snmpd passthrough

NET-SNMP-EXTEND-MIB and the extend directive in snmpd.conf, used to expose the output of shell scripts as custom OIDs.

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New here? The Guides menu above is the place to start if you want the concepts explained rather than just looked up.

ARRIS-D5-CHANNEL-MODE-LOG-MIB

9 objects

This MIB contains objects to monitor QAM channel mode changes on the ARRIS D5 UEQ.

Imported Objects

ARRIS-MIB	arrisD5UEQam
IF-MIB	InterfaceIndex
SNMPv2-SMI	MODULE-IDENTITY NOTIFICATION-TYPE OBJECT-TYPE Unsigned32
SNMPv2-TC	TEXTUAL-CONVENTION

OID	Name	Access	Status	Description
1.3.6.1.4.1.4115.1.8.1.23	Identityd5ChannelModeLogMib			This MIB contains objects to monitor QAM channel mode changes on the ARRIS D5 UEQ.
1.3.6.1.4.1.4115.1.8.1.23.1	Tabled5ChannelModeLogTable	not-accessible	current	This table lists channel mode changes on the D5 UEQ.
1.3.6.1.4.1.4115.1.8.1.23.1.1	Rowd5ChannelModeLogEntry	not-accessible	current	An entry for the D5 channel mode log table.
1.3.6.1.4.1.4115.1.8.1.23.1.1.1	Columnd5ChannelModeLogIndex	not-accessible	current	Table index for channel mode log entries.
1.3.6.1.4.1.4115.1.8.1.23.1.1.2	Columnd5ChannelModeLogTimeStamp	read-only	current	The POSIX time at which the channel change occurred.
1.3.6.1.4.1.4115.1.8.1.23.1.1.3	Columnd5ChannelModeLogIfIndex	read-only	current	The interface index of the QAM port on which the channel mode change occurred.
1.3.6.1.4.1.4115.1.8.1.23.1.1.4	Columnd5ChannelModeCurrentValue	read-only	current	The value of the channel mode prior to the mode change.
1.3.6.1.4.1.4115.1.8.1.23.1.1.5	Columnd5ChannelModeNewValue	read-only	current	The new value of the channel mode.

Type Definitions

Name	Syntax	Status	Description
D5ChannelMode	INTEGER { single(1), dual(2), quad(4), hex(6), octal(8) }	current	Type definition for channel modes.

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