How can I test the functionality of my SNMP device?

I have problems with receiving SNMP data. How can I test my SNMP device on protocol level ?

This article applies to PRTG Network Monitor 16 or later

Debug SNMP Problems with the Paessler SNMP Tester

With the SNMP Tester you can run simple SNMP requests against a device in your network. This test program is based on the SNMP technologies built into PRTG Network Monitor.

Benefits

The Paessler SNMP Tester aims to

• enable SNMP debugging in order to find communication and/or data problems in SNMP monitoring configurations.
• perform SNMP walks. You can use the Walk option of the SNMP Tester to check OIDs, and to discover OIDs that you can use to access custom monitoring objects. See this article for a step-by-step instruction on How to Perform an SNMP Walk with the Paessler SNMP Tester.

Findings

• If SNMP connection works with the Paessler SNMP Tester it will also work with PRTG.
• If you need analysis, check the SNMP Tester logfile in the Paessler SNMP Tester data folder. You will find the exact protocol of every step of an executed SNMP request in that logfile.

Download & User Manual

Please see the SNMP Tester page for more information, the manual, and a download link.

More

• Paessler Knowledge Base: How do SNMP, OIDs and MIBs work?
• Paessler Knowledge Base: Where can I find MIB files for my device?
• Paessler Knowledge Base: OIDs for SNMP Custom Sensors
• PRTG User Manual: Network Monitoring via SNMP Technology

Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.