[SOLVED] When the same monitoring item is used in the Zabbix trigger, the values of item.value1 and item.value2 in the custom alarm message are always the same

When the same monitoring item is used in the Zabbix trigger, the values of item.value1 and item.value2 in the custom alarm message are always the same

I want to monitor changes in IP, and this is my trigger expression:

    
last(/Zabbix server/check.ip[www.a.com])<>last(/Zabbix server/check.ip[www.a.com],#2)

I want to reflect the changes in new and old IPs，so my custom alert message is like this:

TITLE：{EVENT.NAME}  
IP CHANGE：{ITEM.VALUE2} ==> {ITEM.VALUE1}  
EVENT TIME：{EVENT.DATE} {EVENT.TIME}  
EVENT ID：{EVENT.ID}

But I found that {ITEM. VALUE1} and {ITEM. VALUE2} always get the same value, which is the latest value of the monitored item。 Does {ITEM.VALUE<1-9>} always get the same last value when using the same items in the trigger expression?

Solution

As of Zabbix 6.4, yes.

the historical (at-the-time-of-event) value of the Nth item in the trigger expression

https://www.zabbix.com/documentation/6.4/en/manual/appendix/macros/supported_by_location#items