[syslog-ng]Monitoring connection

Good morning! Have a question regarding syslog-ng TCP/IP connection... Is it possible to configure an SYSLOG-COLLECTION-SERVER to give any kind of alert whenever the connection between this server and any syslog-client is dropped? My problem is: if i plug out the network cable neither the server (AIX) nor the client (an AIX too) do recognize this within an acceptable period of time... Does there exist something like a "SERVER-CLIENT heartbeat" ??? Or... does anybody have an idea how to solve this problem another way? Best regards Roman Ernst