You can view the ports numbers and override the default values for the clustered server instance you created in the previous section, Creating a Cluster . By default, the HTTP ports are 38081 for instance1 and 38080 for instance2. If these ports were busy on your machine when you created these clusters, or if you had already assigned these ports to other instances and clusters, different port numbers were assigned.
To view the port numbers and optionally override the default values, follow these steps:
In the left pane, expand Clusters and click cluster1 to display the General Information page for clusters.
Click the Instances tab to display instance1 and instance2, the instances that you created.