I just installed two Zabbix servers (Master:Child-Node configuration). I have the Zabbix servers monitor itself and also monitor each other. From the log, I can see the communication between the Master and the Child-Node). I did select the child node drop-down on the Master front-end. Changes that I made on the Master front-end are propagated to the Child-Node. The only thing is, I can't bring up the graph for the child-node from the Master front-end. If I bring up the front-end on the child-node, I can see the graph. It is like there is no trend data. So far, I only have two hosts setup which are the Zabbix servers.