Working With Calculated Items - Novice User

[jimbrewski]

I also posted this as a visitor message. I am using a Cisco router template that is retrieving inbound and outbound octets on a serial interface as separate items. I have worked for two days trying to create a calculated item that is a combination of those two items so I can create a "baseband" graph of that circuit that shows total usage. I am getting some kind of number from Zabbix based on what I have in the Key and Formula fields but it certainly isn't the combination of the inbound and outbound octets. Any suggestions would be greatly appreciated. I surmise that my main issue is not completely understanding the syntax that needs to be in the Key and Formula fields. Thank You.

[MrKen]

Example #3 in the online documetation looks pretty clear how to do this http://www.zabbix.com/documentation/1.8/manual/config/items#calculated_items

The key can be anything you want, e.g ifInOutTotal

Something like this for the formula:
last("ifOutOctets1")+last("ifInOctets1")

MrKen

[jimbrewski]

MrKen,
Many thanks for your reply. Tried exactly that previous to my post but the result I was seeing in latest data was nowhere near the combination of the inbound and outbound octets. For example, inbound octets might be 142k and outbound octets might be 98k. ifInOutTotal was 192bps -- not even 1k. I'll keep trying to see if I can figure it out. Again, thanks for replying.

[richlv]

you could post full item config screenshot. wild guess - what is "store value" set to for the calculated item ? it should be "as is".

[zabbixei]

calculated Items for Catalyst switches

Hello Everyone,

i am new to Zabbix and i am using version 2.4. after so many searches and struggles found out the right templates for my switches to monitor each port of switches but now i want to make a map with calculated items or host to know the flow of single port in a map.

can someone please explain me how to do it because i had look to zabbix documentation but i did not get anything useful so i can make calculated values.

thanks in advance.

John

[zabbixei]

Example #3 in the online documetation looks pretty clear how to do this http://www.zabbix.com/documentation/1.8/manual/config/items#calculated_items

The key can be anything you want, e.g ifInOutTotal

Something like this for the formula:
last("ifOutOctets1")+last("ifInOctets1")

MrKen

i want something similar but i have tried this above formula and it does not work.

i have tried all these:

last("ifOutOctets1")+last("ifInOctets1")
last("ifOutOctets10101")+last("ifInOctets10101")
last("Cisco L3S2:ifOutOctets10101")+last("Cisco L3S2:ifInOctets10101")
{last("Cisco L3S2:ifOutOctets10101")+last("Cisco L3S2:ifInOctets10101")}

Cisco Lxxx is my switch name
10101 is port number

but none of them worked, if use this: {Cisco L3S2:ifInOctets.10101.last(0)} I only get the inbound for the this port but it does not working with summation.

can you please advise how i can figure it our.

thanks in advance.

P.S. I am using Zabbix 2.4


John

[aib]

Sorry about that, but you CANNOT use any formula in Labels.
So, you cannot calculate the summarized value and show it on map.
You have to create an Item, which will summarize all data which you need, and then you can show that Item on map.

[grmnrvs]

Sorry about that, but you CANNOT use any formula in Labels.
So, you cannot calculate the summarized value and show it on map.
You have to create an Item, which will summarize all data which you need, and then you can show that Item on map.

Hi aib can i made that?

I've two snmp agent items (look the picture)


And I need to create a Calculated Item to sum the totals of both SNMP Agent Items, and I'm confused about how to create or write the correct formula.

I need this because I want to calculate how much percentage of bandwidth I have used over the available bandwidth of a link.

[aib]

Create a "calculated" Item prototype and use formula:
last("net.if.in(ifHCInOctets.{#SNMPINDEX})")+last( "net.if.in(ifHCOutOctets.{#SNMPINDEX})")
I'm using a similar formula to calculate total traffic going through Internet port.