What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Snmp v3 sensors stop working



I have few devices (cisco, APC, HP etc), and i have some SNMP (v3) sensors for it.
After i have change SNMP password for cisco devices, its SNMP sensors stopped to work. What I've done:

  1. Re-create devices
  2. Update PRTG to latest stable version
  3. Restart probe and server services. All this actions had no success for me. Credential I entered is absolutely correct, I check it via Paessler SNMP tester (check uptime of devices).

How can I fix this problem?

cisco snmp snmp-sensor

Created on Oct 16, 2018 12:43:46 PM

Last change on Oct 16, 2018 1:48:44 PM by  Luciano Lingnau [Paessler]

1 Reply



Hi there,

Could you post the log of the "Read Device Uptime"-Scan from within the SNMP Tester?

Best regards.

Created on Oct 17, 2018 1:22:03 PM by  Dariusz Gorka [Paessler Support]

Last change on Oct 17, 2018 1:22:12 PM by  Dariusz Gorka [Paessler Support]

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.