---
type: Sensor Reference
title: "Complete SNMP OID Catalog: Every Sensor & Metric"
description: "A copy-paste SNMP OID reference mapping CPU, memory, disk, interface, physical and device metrics to their MIB, base OID and unit."
resource: "https://snmp-monitoring.info/sensors/all/"
tags: [sensors]
timestamp: 2026-07-11T00:00:00Z
---

# Complete SNMP OID Catalog: Every Sensor & Metric

A copy-paste SNMP OID reference mapping CPU, memory, disk, interface, physical and device metrics to their MIB, base OID and unit.

## Related concepts

- Up: [SNMP Sensors & OID Catalog: Every Metric You Can Monitor](/sensors/index.md)

## Frequently asked questions

### What are the most common SNMP OIDs?

The everyday set: hrProcessorLoad (1.3.6.1.2.1.25.3.3.1.2) for CPU, the hrStorageTable rows (1.3.6.1.2.1.25.2.3.1.5/.6) for memory and disk, sysUpTime (1.3.6.1.2.1.1.3.0) for uptime, and the IF-MIB counters (ifHCInOctets 1.3.6.1.2.1.31.1.1.1.6) for interfaces. Those cover most host and network dashboards.

### What OID is CPU, disk, or uptime?

CPU is hrProcessorLoad at 1.3.6.1.2.1.25.3.3.1.2 (per core). Disk/memory capacity and usage are the hrStorageTable columns 1.3.6.1.2.1.25.2.3.1.5 (size) and .6 (used). Uptime is sysUpTime at 1.3.6.1.2.1.1.3.0, or hrSystemUptime at 1.3.6.1.2.1.25.1.1.0 for OS uptime.

### How do I test an OID?

Use snmpget for a single scalar (with its trailing instance, e.g. .0) and snmpwalk to traverse a table or subtree. If the object returns nothing, the agent may not implement that MIB or a view is filtering it — walk the parent branch and check names with a MIB browser.

### Where do vendor OIDs live?

Under the enterprise arc 1.3.6.1.4.1, followed by the vendor's assigned number. Anything a standard MIB doesn't cover — RAID health, a specific PDU outlet, a labelled CPU-temperature sensor — is typically found there, and you need that vendor's MIB to interpret it.

## Source

Concept generated from https://snmp-monitoring.info/sensors/all/ — the SNMP Monitoring vendor-neutral knowledge base. Content is limited to what that page states (no external claims added here).