Query and combine multiple SNMP OID values in one item?

[jjeff123]

Trying to update the HP Enterprise SNMP to gather data for the Aruba CX. The CX switches have multiple CPU cores and % utilization can be gathered for core 1 via OID 1.3.6.1.2.1.25.3.3.1.2.196608, core 2 1.3.6.1.2.1.25.3.3.1.2.196609....

So what I want, is to basically do an SNMP walk of all the values returned by 1.3.6.1.2.1.25.3.3.1.2 and average them together.

I am far from an SNMP expert, I can have the switch query itself, on an Aruba 6100 (basic layer 2 CX series), I get this:

Switchname# diag utilities snmpwalk oid .1.3.6.1.2.1.25.3.3.1.2 community public
HOST-RESOURCES-MIB::hrProcessorLoad.196608 = INTEGER: 21
HOST-RESOURCES-MIB::hrProcessorLoad.196609 = INTEGER: 22

The larger boxes have more cores.

So no problems getting one OID into Zabbix, it happily tells me the value for core 1, but I don't want to make a separate template for each model based on the number of CPU cores.

[rogzon]

Hi! I know this is a rather old post but...
Did you ever figure this out?

[Hamardaban]

https://www.zabbix.com/documentation/6.4/en/manual/introduction/whatsnew640?hl=walk#optimized-snmp-discovery-and-collection

walk[]

[rogzon]

Great, that would do it but.... I am having a hard time to understand how to combine the OID results i.e (OID #1 + OID #2)/OID #3 to get one single result. OID #1 and OID #2 would be counters and OID #3 is Gauge.
As it seems the preprocessing could only handle one change per second preprocess?
I am trying to get rid of "Bits received", "Bits sent" and "Speed" in favour of a proper Throughput number with attached trigger in a discovered item from a network switch.
I am also trying to keep the "Latest data" monitoring screen from getting cluttered with items I don't really need (right now I am calculating throughput but that means that Bits sent/received and speed needs to be discovered for use in calculation).