How does 1 create a check to just get some SNMP values from a device

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I have some IP camera’s (Avigilon) as well as some other SNMP devices that I want to get some information from. I don’t see any predefined checks for these. I have the MIB’s. I have a short test list of OID’s that I just want to get. I want to right a check that runs on the CheckMK server that would query snmp and for the different models collect the data and map it to a service name. Like Model being one. So how do I start this? Just looking for a starter peace. Then if I have a value for firmware then how to do map OID to say Firmware?

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Hi @jbennett ,

welcome to checkmk :slight_smile:

You could start the “big way” and develop your own SNMP check plugin: Writing your own check plug-ins

Or you just create active checks, one for each OID that you want to query. This can be done with the Nagios plugin check_snmp. We have created an extension package that provides a ruleset for easy configuration: Checkmk Exchange

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Thank you for this. I think I want to write a SNMP check plugin. I see the items under 8.4 but I guess I am not understanding how you take 1 OID and name it to say Model. Then another OID and name it Firmware and so on.

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It depends on the structure of the SNMP data. You could implement separate service checks for each or just use the name as item.

Have a look at the existing check plugins to get an idea how it is done.

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I have looked at them but I am not seeing a correlation.
For example here is an Uptime.
OID=.1.3.6.1.4.1.46202.1.1.1.3.0, Type=TimeTicks, Value=3 days, 0:10:22.41

So how would I make this show
OID=.1.3.6.1.4.1.46202.1.1.1.3.0
Value I am guessing might be in a number and I see where I would use a function for converting.
I want to call this Uptime and display 3 days, 0:10:22.41

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Quick reply before I go have my weekend (-:

Maybe easier to start with active checks as @r.sander suggested first.
So: Setup | Services | Other services | Integrate Nagios plugins

Example for showing model of my printer:

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This is a rule that I apply to ‘all’ my printers

When you got that working, you can take a step further making it into a plugin the big way.

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So I tried this with both a model OID and the uptime. I am getting this error. I have also tried this with putting the IP address in the rule same thing.
External command error: snmp_build: unknown failure

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