Each instance referencing a named configuration initially inherits its port numbers from that configuration. Since port numbers must be unique on the system, you might need to override the inherited port numbers.
In the tree component, expand the Configurations node.
Select the node for a named configuration.
Select System Properties.
The Admin Console displays the Configuration System Properties page.
Click Instance Values next to the instance variable you want to edit.
For example, if you click Instance Values next to the HTTP-LISTENER-PORT instance variable, you see the value of HTTP-LISTENER-PORT for every server instance that references that configuration.
Change the values as desired and click Save.