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, and troubleshooting — see the Guides and SNMP Resources menus 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.

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, and working through the errors people run into most. A few places to start:

What is SNMP?

The fundamentals: what the protocol actually does, how a manager and an agent talk to each other, and where MIBs fit into that conversation.

Installing and using net-snmp

How to install the standard Linux SNMP toolkit, use snmpget/snmpwalk/snmpset, and get MIB names resolving instead of raw OID numbers.

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.

Enterprise OIDs and private MIBs

How vendor-specific data fits into the same global OID tree as everything else, and how to find a given vendor's reserved number.

Diagnosing an unknown OID

What to check when a monitoring tool returns a bare number instead of a name, and how to track down the MIB that defines it.

SNMPv3 authentication failures

The most common causes of authPriv/authNoPriv mismatches, and how to tell a wrong password from a wrong security level.

DOCSIS modem bootfiles

Compiling a cable modem's configuration file from plain text, including the open-source tool most ISPs actually use for this.

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 and SNMP Resources menus above are the place to start if you want the concepts explained rather than just looked up.

About MIB Viewer

MIB Viewer is a free, searchable database of SNMP MIBs and OIDs, built to solve a problem anyone who's worked with SNMP has run into: Finding the OIDs you need or conveniently looking up the ones you already have has historically been cumbersome.

What we're building

At its core, MIB Viewer is a large, continuously growing database of parsed MIB files - both the standard, cross-vendor MIBs every device supports and the enterprise-specific MIBs published by individual hardware vendors. Search by MIB name, by OID, or by object name, and see exactly where an object sits in the tree, what it means, and how it's typed - without needing to load anything locally.

How the database grows

We add new MIBs on an ongoing basis, and anyone can contribute one directly - drop a MIB file into the upload tool and it's parsed and explorable immediately. Files uploaded this way stay private to that browser session by default; only MIBs we've reviewed and added to the shared library show up for other visitors.

What we're aiming for

Our goal is simple: keep MIB Viewer free, keep it accurate, and keep expanding what it covers, so it becomes a more complete and more reliable resource over time.