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What's a MIB?

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.

What's SNMP?

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.

What's an OID?

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 →

Guides & Resources

Beyond the lookup tool, the site includes practical, hands-on guides and reference material — installing and using the standard SNMP tools, configuring SNMP on specific vendor hardware, monitoring DOCSIS cable modems and CMTSs, and working through the errors people run into most. A few places to start:

SNMP Fundamentals

The manager/agent model, MIBs and OIDs, versions, access control, and all six core operations in one place.

Using net-snmp

Installing the standard Linux SNMP toolkit, the client commands, running an agent, receiving traps, and loading MIBs into each one.

Configuring SNMP on Cisco devices

Community strings, SNMPv3 users, and trap destinations across classic IOS, IOS-XE, and NX-OS — including where NX-OS's syntax genuinely diverges.

Configuring SNMP on Fortinet devices

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

Understanding MIBs

How objects, tables, and notifications are actually defined, and how vendor-specific numbering keeps everyone's private OIDs from colliding.

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Searching OIDs

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Modem/MTA bootfiles

Compiling modem and MTA configuration files from plain text, and reading real Arris and Hitron examples OID by OID.

DOCSIS Monitoring

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.

Get started

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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.

RAISECOM-EXTLOOPBACK-MIB

14 objects

This MIB module defines objects to rcExtLoopback

Imported Objects

IF-MIB	InterfaceIndex
Q-BRIDGE-MIB	VlanId
RAISECOM-BASE-MIB	iscomSwitch
SNMPv2-TC	Counter32 Gauge32 Integer32 MacAddress Unsigned32
SWITCH-TC	EnableVar

OID	Name	Access	Status	Description
1.3.6.1.4.1.8886.6.1.45	IdentityrcExtLoopback			This MIB module defines objects to rcExtLoopback
1.3.6.1.4.1.8886.6.1.45.1	NodercExtloopbackObjectsGroup
1.3.6.1.4.1.8886.6.1.45.1.1	ScalarrcExtLoopbackBMDMacTransEnable	read-write	current	The mode of broadcast-mulitcast dmac transform
1.3.6.1.4.1.8886.6.1.45.2	NodercExtloopbackConfigGroup
1.3.6.1.4.1.8886.6.1.45.2.1	TablercExtLoopbackTable	not-accessible	current	This table contains sla control data.
1.3.6.1.4.1.8886.6.1.45.2.1.1	RowrcExtLoopbackEntry	not-accessible	current
1.3.6.1.4.1.8886.6.1.45.2.1.1.1	ColumnrcExtLoopbackPortIndex	not-accessible	current	An index based on the equipment port number.
1.3.6.1.4.1.8886.6.1.45.2.1.1.2	ColumnrcExtLoopbackDMac	read-write	current	The packets which is based on this DMAC rule are loopback.
1.3.6.1.4.1.8886.6.1.45.2.1.1.3	ColumnrcExtLoopbackSMac	read-write	current	The packets which is based on this SMAC rule are loopback.
1.3.6.1.4.1.8886.6.1.45.2.1.1.4	ColumnrcExtLoopbackSVlan	read-write	current	The packets which is based on this SVLAN rule are loopback.
1.3.6.1.4.1.8886.6.1.45.2.1.1.5	ColumnrcExtLoopbackCVlan	read-write	current	The packets which is based on this CVLAN rule are loopback.
1.3.6.1.4.1.8886.6.1.45.2.1.1.6	ColumnrcExtLoopbackTime	read-write	current	How long loopback will last. '0' indicates forever.
1.3.6.1.4.1.8886.6.1.45.2.1.1.7	ColumnrcExtLoopbackMode	read-write	current	The on-off loopback function.based on one of rules .

Type Definitions

Name	Syntax	Status	Description
RcExtLoopbackMode	INTEGER { disable (1), port (2), dmac (3), smac (4), cvlan (5), svlan (6), dvlan (7) }	current

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