Different results from 'check_snmp' running on different servers

[Richard Luys-Nagios User]

Thomas,

Thanks for your swift reply!

I've been digging deeper into the hell called SNMP, and found out what the  
problem is:
The NET-SNMP commands return these two errors:

Cannot find module (SNMPv2-TC-v1): At line 11 in  
/usr/share/snmp/mibs/CISCO-ENVMON-MIB.txt
Cannot find module (SNMPv2-SMI-v1): At line 10 in  
/usr/share/snmp/mibs/CISCO-SMI.txt

Strange thing is: SNMPv2-TC and SNMPv2-SMI are available, but not these  
'-v1' variants. Even stranger is that the 'oldNagios' server doesn't have  
these modules either, but does not complain. So the WARNING is indeed  
issued by the underlying snmpget command and does not indicate a problem  
with the monitored device.

Regarding not being able to monitor a status change on these OID's: I  
think you are right. I did not create these checks but one of my  
colleagues did, and I will give him the OID's you suggested to monitor so  
we can improve these checks.

Thanks again for sharing your thoughts!

Regards,
Richard

On Thu, 03 May 2007 15:14:49 +0200, Thomas Guyot-Sionnest <dermoth at aei.ca>  
wrote:

> On 03/05/07 06:06 AM, Richard Luys-Nagios User wrote:
>> Hi list,
>>
>> I have an odd problem, hope someone can shed some light on this.
>>
>> I'm busy installing a new Nagios server. The old one is running Nagios
>> 1.2, and the new one is running 2.9. The used nagios plugins on the old
>> server is version 1.3.1, on the new server it is: 1.4.8.
>>
>> I issue the following check from the old server (the 1.2):
>>
>> oldNagios:/usr/local/nagios/libexec # ./check_snmp -H switch1 -o
>> ciscoEnvMonTemperatureStatusDescr.1005
>> SNMP OK - Switch#1, Sensor#1, Status is GREEN
>>
>> The exitcode of this check is 0 (OK)
>>
>> newNagios:/usr/local/nagios/libexec # ./check_snmp -H switch1 -o
>> ciscoEnvMonTemperatureStatusDescr.1005
>> SNMP WARNING - Switch#1, Sensor#1, Status is GREEN
>>
>> Now the exitcode is 1 (WARNING) !!!
>>
>> Then I issue this check from the new server (the 2.9 installation), but
>> with the old plugin (1.3.1):
>> newNagios:/usr/local/nagios/libexec.131 # ./check_snmp -H switch1 -o
>> ciscoEnvMonTemperatureStatusDescr.1005
>> SNMP WARNING - Switch#1, Sensor#1, Status is GREEN
>>
>> And again: the exitcode is 1 (WARNING)
>
> You're checking is a string so normally it always return OK. If it
> returns a non-ok status it's most likely because snmpget returned
> something on STDERR. use the -v switch to see which command is being
> run, and then you can run it yourself to see what's going on (usually
> it's MIB parsing errors like illegal characters - there's multiple way
> to fix these issues)
>
> If you want to alert based on the status returned you should rather use
> a OID that returns a numeric value like these ones:
>
> ciscoEnvMonTemperatureStatusValue
> ciscoEnvMonTemperatureState
>
> Thomas



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