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SNMP Error 2011 - snmptester is working?




We're having a problem on PRTG where one of our device's SNMP sensors is failing with error -2011 on SNMPv3.

I've reset the credentials, restarted the unit (just to be sure) but nothing I do helps.

the SNMPTester works perfectly, I can see the uptime on the unit and can go through a network walk on the device too - all passes with flying colours.

Any suggestions as to why PRTG would be failing? I'm carefully copying/pasting any passwords and sensitive values to be sure I'm not messing up there.



2011 snmp snmptester

Created on Apr 5, 2019 12:42:06 PM

3 Replies

Accepted Answer



Hi there,

As a test, please restart the Probe Service under which you have added the sensors. It can happen that certain changes to the SNMP Credentials result in hanging SNMP Connections.

best regards.

Created on Apr 5, 2019 6:34:03 PM by  Dariusz Gorka [Paessler Support]



Hi Rob,

I am facing the same issue with a snmp sensor. Were you able to solve the problem?

best regards, Adrian

Created on Aug 21, 2019 11:17:41 AM



Hi there,

Have you restarted the Probe Service as suggested?

Best regards,

Created on Aug 21, 2019 11:22:51 AM 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.