Problem SNMP UNKNOWN

[sofiane]

.1.3.6.1.2.1.1.3.0 would be a full OID

Result :

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SNMP OK - Timeticks: (380169) 1:03:21.69 | 

[rhassing]

And what happens if you do

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check_snmp -m ALL -H localhost' -C public -o sysDescr.0

[sofiane]

Result :

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SNMP OK - Linux Sofiane 4.9.0-4-amd64 #1 SMP Debian 4.9.65-3 (2017-12-03) x86_64 | 

[rhassing]

So it should work in Nagios as well...
This is the command from your command.cfg file

[sofiane]

I don't know why, but it still doesn't work

[kyang]

Wow, thanks @rhassing!

sofiane, it doesn't work? Same error as the first screenshot?

Were there any changes to the commands.cfg? Or is it still the same?

Is the path to check_snmp plugin actually this /usr/lib/nagios/plugins/check_snmp?

[sofiane]

Wow, thanks @rhassing!

I'm so boring ?

sofiane, it doesn't work? Same error as the first screenshot?

Yes, unfortunately

Were there any changes to the commands.cfg? Or is it still the same?

The same

Is the path to check_snmp plugin actually this /usr/lib/nagios/plugins/check_snmp?

Yes.

[tgriep]

Another reason for the errors you are receiving is that the SNMP Daemon that is running on the server is not allowing the polling of those OID's so can you post your snmpd.conf file so we can check it?

[sofiane]

Sorry for my inactivity, I had some problems IRL

After reinstalling Nagios, all my snmp services have now "critical" status and graphs don't work (better than "unknown" I agree )



I don't now why, but "SNMP_service.xml" doesn't want to be created in /usr/local/pnp4nagios/var/perfdata/localhost/ , even after restarting npcd service

[tgriep]

Check and see if after reinstalling Nagios, the check_snmp plugin was reinstalled as well in to the following location.

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/usr/lib/nagios/plugins/

If the plugin is missing, that would generate the error you are receiving.