MultiCastGroup settings in MCS

Answer

Information about setting MultiCastGroup IP and port in DistributedGlobalCache-Config.xml and DistributedEventService-config.xml:

• MultiCastGroup IP and port is set for the EhCache to discover CacheManager peers participating in the cluster.
• The MultiCastGroup IP and port number defined in the application property file are different from what is set at the application server level. It is NOT the IP:port of any physical machine.
• Each environment should have unique IP:Port combination. As an example, you have Production and Staging as two environments. For production you chose 224.0.0.1:7001 and for staging 224.0.0.2:7001 is chosen. So, 224.0.0.1:7001 should be set in the property files of all the nodes in production and 224.0.0.2:7001 should be set in all the property files in Staging. They should NOT be same.
• This is NOT the IP:port of the respective admin servers.
• Please use the IP in the range 224.0.0.1 to 239.255.255.255. The Out of the box (OOTB) ports set in each property file can be used.
• This property is set in DistributedEventService-config.xml and DistributedGlobalCache-Config.xml. It does not have to be set it in EhCache.xml as it would be redundant.

References:

• Comments in EhCache.xml, DistributedEventService-config.xml and DistributedGlobalCache-Config.xml