Configuring Cluster Communication
Ports
This procedure enables you to change the assigned join port of a server process, on which the server process listens for connections (for example, when the port assigned to the cluster element is already in use by another program).

Do not modify the cluster element ID (element.clusterId), group ID (element.groupId), name (element.name) or type (element.type) properties. Modifying any of these properties leads to problems within the cluster communication and operation.
...
1. Start the Config Tool.
2. Choose cluster-data→ template → instance - <n> → managers → ClusterManager.
3. From the list of properties, select element.joinPort.
4. In the Custom value field, set the required value.

The port value must not be greater than 65535, less than 1024, or a port that is already in use.
5. To apply the new value, choose Set.
6.
To save the
changes, choose
Apply Changes.
7. For the changes to take effect, restart the cluster.