calculated Item in SNMP template

[ali136]

Hello everybody,
I have a scenario which drives me crazy.
let's suppose I have a device with 4 ethernet interfaces.
I need to to have one calculated item to know the sum of inbound traffic.
I googled it everywhere users said you should do something like this:
last({TEMPL_NAME:KEY_OF_OIDA})/last({TEMPL_NAME:KEY_OF_OIDB})
my problem is that Key is the same for all of the interfaces and I have one item prototype
can anyone tell how to do it? there are more than 1000 host monitored, so I have to do it using a template.
Thanks in advance

[kloczek]

If you need a sum why you are using division?

[ali136]

I replied yesterday but it's not posted yet.
what I said, I meant I need two keys to do the calculation, and it was based on assumption.
what I really need is data-rate on wireless devices
each card has two chains each chain datarate for RX and TX
so I will have TX-vertical TX-horizontal and I need the sum of both TXs and both RXs
here is what I did so far:

then created Item prototype


so far everything is ok

now what I need is the sum of above Items

thanks in advanced

[kloczek]

Something like data rate is calculated by zabbix automatically (item page -> Preprocessing tab -> Add -> in Name drop down list you have Simple change and Change per second).
In other words you don't need to use calculated item type.

[ali136]

I could not find the processing tab, neither in discovery nor in the host itself. I'm using version 3.2
but that is not my problem
for each host I will have 4 Items, as below:
I added values to make more sense.
RX vertical : 350
RX horizontal : 350
TX vertical :200
TX horizontal 100
now what I need is
RX : 700
TX : 300
I already have datarate per second with no problem



Thanks.

[ali136]

Any help ?

[ali136]

no one answered

lets put it this way and I tell you another problem that I've faced.
I have a device which has 36 cores of CPU, I got each core usage as an Item, now I want to calculate the average
in order to do this I should somehow be able to say:
sum(all-Items)/core-count.
I know the format that I wrote is not gonna work. I'm looking for the correct one.
Device SNMP does not support load-average or something like that.
thanks in advance.

[kloczek]

You just started new thread,
You don't need to sample CPU usage per core and than calculate avg because system.cpu.util[.<type>,] automatically gives you what you want (default this key gives avg in last 1min).
https://www.zabbix.com/documentation...s/zabbix_agent.
About you prev topic: you cannot have one metric on horizontal ax and another on vertical one because all metrics are on time scale (horizontal).
And generally .. I've lost what you really want to implement (and this is only reason that no one answered).

[ali136]

Hi
thank you klocdek
using Zabbix agent would be a good idea if the device supports it, but unfortunately, I have to use SNMP. If I have answer for this question I will figure out the other question
thanks in advance.

[ali136]

About you prev topic: you cannot have one metric on horizontal ax and another on vertical one because all metrics are on time scale (horizontal).

its two streams of data, just like having two wireless cards except it is one card. I mean you can assume I have 200M in one card and 100M in another card and I need calculation. it is called polarization (vertical, horizontal) in wireless.
If you look at my questions they are quite straightforward.

calculating the sum of 4 ethernet incoming.
calculating the sum of 2 streams of data in a wireless card.
calculating the sum of 36 cores of CPU to have the average.

All I need is to calculate similar items. that's all.
In all cases that I opened its the same problem.
If it is not possible just tell me. otherwise, please help me.

Thanks indeed.

[ali136]

It seems no one here knows how to solve this problem.

[ali136]

I can even pay for someone who can give me the solution. I really need this to work.