What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general. You are invited to get involved by asking and answering questions!

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
300.000 administrators have chosen PRTG to monitor their network. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags


View all Tags

SNMPERR_UNKNOWN_USER_NAME (SNMP error # -33)

Votes:

0

Your Vote:

Up

Down

I keep getting this error intermittently on one of my switches when using SNMPv3SNMPERR_UNKNOWN_USER_NAME (SNMP error # -33). I have 3 other switches setup with the same configuration and they are fine. What can I do to troubleshoot this. Are there logs in PRTG that can help?

error-smp#-33 prtg9 snmp-sensor

Created on Jul 20, 2017 11:08:59 PM by  Kyle (0) 1



4 Replies

Votes:

0

Your Vote:

Up

Down

Hello,

Thank you for the KB-Post. There isn't much more that PRTG could log there actually. What you see there is the error message that the target device actually throws, the response to the same SNMP v3 monitoring requests, which most of the time appear to be valid (if the errors only appear intermittently).
How often and how long do you see this issue? Does it help to use a longer interval, and thus reduce the load of SNMP-v3 requests on the targets?

best regards.

Created on Jul 21, 2017 12:17:35 PM by  Torsten Lindner [Paessler Support]



Votes:

0

Your Vote:

Up

Down

I have got the same problem. Is there any other advice?

Created on Feb 25, 2021 9:45:31 AM by  sturan60 (0)



Votes:

0

Your Vote:

Up

Down

Hi there,

I'm afraid from our side there is nothing new from our side.


Kind regards

Felix Wiesneth - Team Tech Support

Created on Feb 26, 2021 8:30:16 AM by  Felix Wiesneth [Paessler Support]



Votes:

0

Your Vote:

Up

Down

Don't know which devices you tried to monitor. I had the same issue on my WiFi Controllers .... just don't forget to install/commit pending changes to your switch configuration!

hope that helps anyone.

Created on Jun 8, 2021 4:26:32 PM by  bsc (0) 1



Please log in or register to enter your reply.


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.