Upgrade Guide › JBoss Version › Upgrade on a JBoss Cluster › Decide to Use Unicast or Multicast

Decide to Use Unicast or Multicast

If you install CA IdentityMinder on JBoss 6.1 EAP, you can use either unicast or multicast as the messaging protocol. This protocol is the means of communication between nodes in the cluster. We recommend testing both options to determine the best choice for your organization.

Consider unicast in these situations:

• The servers in your JBoss cluster are on different subnets. This situation commonly exists when you install a JBoss cluster on virtual machines.
• If network congestion is a concern, unicast helps to reduce how many packets are sent between cluster nodes.

Consider multicast in these situations:

• Default deployment of JBoss on a single network
• JBoss 5 is required for the cluster.