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

Warning by lookup value 'Warning' in channel 'Fan 1 State (chassis)'




When I add health sensor for my cisco switch it returns Warning by lookup value 'Warning' in channel 'Fan 1 State (chassis)'.Please let me know How I can fix it?

cisco health prtg

Created on Sep 10, 2018 11:04:59 AM

4 Replies



Hi Sara,

Are you certain there is no ongoing issue on your switch that might cause this status?

You further could check what SNMP is really reporting back by using a SNMP-Test tool - this might help explain what you see. Not sure though about the OID - SNMP ID - you would need to look for - but we might be able to figure it out together.

Paessler offers such a tool here: https://www.paessler.com/tools/snmptester


Florian Rossmark


Created on Sep 11, 2018 1:42:48 PM



Hi there,

The following Column is is used to monitor the FAN-States: Fan State

So please run a "Walk" with the SNMP Tester against the OID and post the results.

Best regards.

Created on Sep 11, 2018 7:04:51 PM by  Dariusz Gorka [Paessler Support]



Hi Having similar issue. The test comes back ok.

----------------------- New Test -----------------------
Paessler SNMP Tester - 20.1.58 Computername: shrdprtg01 Interface: (
3/29/2021 9:37:54 PM (1 ms) : Device:
3/29/2021 9:37:54 PM (4 ms) : SNMP v3
3/29/2021 9:37:54 PM (6 ms) : Walk
3/29/2021 9:37:54 PM (157 ms) : = "1" [ASN_INTEGER]
3/29/2021 9:37:55 PM (234 ms) : = "1" [ASN_INTEGER]
3/29/2021 9:37:55 PM (321 ms) : = "1" [ASN_INTEGER]
3/29/2021 9:37:55 PM (411 ms) : = "1" [ASN_INTEGER]
3/29/2021 9:37:55 PM (487 ms) : = "1" [ASN_INTEGER]
3/29/2021 9:37:55 PM (563 ms) : = "1" [ASN_INTEGER]

I've upgraded PRTG to latest and switch firmware also updated and switch rebooted recently. Anything else I can do to troubleshoot? thanks

Created on Mar 29, 2021 8:57:29 PM

Last change on Mar 30, 2021 4:35:44 AM by  Sven Roggenhofer [Paessler Technical Support]



Hello John,

The result of the SNMP Tester looks fine. PRTG should display the sensor in status "UP" if the channel is referring to one of the listed fans.

For further troubleshooting I would invite you to open a ticket by sending a mail to [email protected].

Kind regards

Felix Wiesneth - Team Tech Support

Created on Mar 30, 2021 1:55:49 PM by  Felix Wiesneth [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.