MIB Viewer
MIB Viewer is a free SNMP MIB browser and database with over 12,000 MIBs and 1,600,000
OIDs, covering both the standard, cross-vendor MIBs every device supports and the
enterprise-specific MIBs published by individual hardware vendors. Search by name, OID,
or number to look up any MIB object, view its syntax, access level, and description,
trace its place in the MIB tree, and generate ready-to-run SNMP commands — all in
your browser, with nothing to install and no account required. The database grows
continuously, and beyond the lookup tool itself, the site includes a growing library of
written guides and reference material covering SNMP concepts, vendor-specific
configuration, DOCSIS cable modem and CMTS monitoring, and troubleshooting — see
the Guides menu above, or the highlights below.
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.
Read more →
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.
Read more →
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.
Troubleshooting SNMP
From a plain timeout to SNMPv3 auth failures to a MIB that won't parse — working through what actually went wrong and why.
Searching OIDs
Starting from a real device's sysObjectID, searching by name or number, and filtering a MIB down to just the objects you need.
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
Search for a MIB or OID above, or pick one from the list on the left.
Have your own MIB file? Drop it on the upload zone in the sidebar (or click to browse)
to parse and explore it right away. It's sent to the server to be parsed and isn't
added to the shared, publicly searchable database — it stays scoped to your own
session in the tree on the left.
New here? The Guides menu above is the place to start if you want
the concepts explained rather than just looked up.