Why is my PRTG sensor failing to connect to an MPLS location, even though the trial version works and other SNMP locations are accessible? Firewall is disabled, UDP 161 is open, version, IP address, and community string are correct.

Common SNMP errors

In case of SNMP Error -2003, please refer to the article My SNMP sensors don’t work. What can I do?

You will find a possible explanation for this error message there.


Use SNMP Tester

Also, try to connect using our SNMP Tester. Please refer to the article How can I test the functionality of my SNMP device?


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.