We have a 900+ host setup, and are configuring host-dependency monitoring.
What we want to achieve is that if a switch is down, all hosts behind it should not alert - only one alert should be send telling that this switch is unreachable.
We have now set it up, but when we loose connectivity to one site (we just had a maintenance break), we still get alerts from a lot of hosts (not all), eventhough our switches are unreachable aswell. My guess is that not all hosts are alerting is caused by Zabbix not knowing/checking if the switch is ok before alerting, because it hasn't checked this switch yet though it's normal check-cycle. In Nagios you could configure (or was it default) this so that it checks parrent dependencies before alerting if check failes for a specific host.
I could setup that it needs x-number of failed child-checks for an alert to happen, but this will delay my alerts and I will have to run a lot of unnessesary checks. I'm really not interested in this as we will have 4-5 dependencies for some hosts !
Is there an option in Zabbix, so I can enable this somehow ?
(in the long run I would surgest making this the default...)
Thanks in advance