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From "Patrick Wang" <>
Subject What is mcastBindAddr for??
Date Sat, 19 Aug 2006 17:53:59 GMT


I am currently setting up 2 linux server and enabled the clustering and
multicast for these 2 servers.


I verified using the cat /proc/net/igmp command and found out once I started the
tomcat, machine will subscribe to the group, multicast address.


I also used the ethereal to see the network traffic, both machine 1 and machine
2 send out UDP packet to address Since from machine1, it can see both
the traffic

>From machine1 and machine2 to, I assume it can receive the message on


However I did not find any tcp replication traffic come between machine1 and
machine2, the traffic between machine 1 and 2 seems all MySQL database request.


Can anyone shed some light on? I did not figure out what's the mcastBIndAddr
inside the server.xml. Documentation indicate it is for binding the multicast
socket to an address?


I donot understand what this is for.




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