Active agent availability check

[dimedrol]

What is the best way to check if active agent has access to active server?
This could not be performed for active only agents, because they will not be able to notify server that it is inaccessible. But active+passive agent could be passively asked if all servers from ServerActive are available and inform about not accessible servers.

So are there any way of performing such check except for creating script that parses config file and telneting to every server?

[dimedrol]

If anyone is interested - solution is rather simple.
Trigger on any active check, that should regularly send data to zabbix and doesn't do it for a period of time.
If host has no connection to zabbix server it will never receive any active check and will never send any data back - so this will fire up.