Create an item using existing items

[ram_0000]

I have a host (a Cisco router in fact) that can only perform snmp request/response (no zabbix agent)

I would like to create a new item mesure which is for example (last ifInOctets1) - (current ifInOctets1) to display it in a graph

Is it possible and if yes, how

Thank you for help
Raymond

[Alexei]

Hi Raymond,

I believe you want to see speed of the interface, not simple difference. I mean (last - current)/(last_time-current_time).

Go to Item configuration screen and select Store value: Delta

ZABBIX will automatically calculate speed of change of the monitored parameter, and will also correctly processe interface resets.

Note that ZABBIX 1.1 will support calculation of simple difference between last and previous values as well.

[ram_0000]

Exactly what I needed

Thank you

Raymond