how to create a trigger that evaluates an items for two last reads?

[theologu]

Hello folks,

I am trying to monitor some Cisco Routers and I need to define a trigger for device availability, but to be activated only if the check is true for the last two reads...

For example I have an item with icmpping that runs at every 5 minutes for that device. Ok, I create a trigger with a key icmpping.last(0)=0 BUT I want something like "if the item is the two last times 0 then activate the trigger" or "if that host does not respond to ping two consecutive times, alert me" Is there an expression for this?

Thanks!

[Tenzer]

There are in fact several ways to do this. Try to look in the bottom of this page, there are some examples on how to make different triggers:
http://www.zabbix.com/manual/v1.1/config_triggers.php

[offline]

i do {google.com:icmpping.min(360)}=0

or

{google.com:icmpping.min(#3)}=0


or either

{google.com:icmpping.max(360)}=0


but i doesnt work. The item triggered whenever first change in value noticed.

I use Zabbix 1.4.4

[offline]

It is a bug or im doing something wrong?

[cstackpole]

How often is it checking? Will the last three checks be within 5 minutes? If so you should be able to try something like count or avg.
What if you try:
{google.com:icmpping.count(360,0,"eq"}>2

I don't know if that will help you without knowing a bit more. Look through page 117 (well it starts on that page) of the Zabbix manual (Release 12 is the latest) for more info.