Nagios Support Forum

You need to identify the oid that you wish to check. It may be better to dump the walk's output to a file from the cli and then attach it to your next post so that we can look at the walk and help you identify the oid you are looking for:
V1: V2c: Attach /tmp/walk.txt to your next post.

Ok, got the file, and attached

This device has 7 external temperature sensors and 16 External Switch Sensors.
The external Switch's need to alert when the state is 'Closed' (they are currently all open----good)

the temperature settings should alert at 65.

Well, that walk was *very* spartan.

Is there a chance that these values/oids are not pollable, and are only reported as events through snmp traps?

Hopefully, this will help
Using iReasoning MIB Browser, I was able to find this:

Well, we can try to snmpget those oids:

[root@localhost tmp]# snmpget -c public 10.100.3.121 1.3.6.1.4.1.20916.1.8.1.2.1.1
No log handling enabled - turning on stderr logging
snmpget: Timeout

My guess is access control on the device:

http://www.net-snmp.org/wiki/index.php/ ... t#Timeouts

Specifically, if there is a web interface where you can configure the device I would look around for something like "Access List" or "Blocklist" or something similar where you can allow the Nagios IP to query.

but the snmp walk that nagios does do, the fact that it returns info shows its responding isn't it?

It might be configured to allow certain OIDs to all IPs, but others must be allowed e.g. for security-related gets.

Or these oids are only event-based traps. Can you contact the vendor for clarification?