After upgrading the source server to Enterprise Server, start the domain and then the node agent, which, by default, starts the server instances. If you have upgraded from Application Server 8.x EE, you might face problems while attempting to start the node agent. The domain, clusters, and instances have admin port set to 4849 and the node agent points to 4848. You need to manually modify the admin port to which the node agent points. To change the node agent port, edit the agent.das.port property in the install_dir/nodeagents/node-agent-name/server_name/config/das.properties file.
Start the Admin Console and verify that these servers are started. If any of the servers are not running, in the install_dir/nodeagents/node-agent-name/server_name/logs/server.log file, check for failures that are caused by port conflicts. If there any failures due to port conflicts, use the Admin Console and modify the port numbers so there are no more conflicts. Stop and restart the node agent and servers.
The default ports in Enterprise Server are:
4848 for admin port
8080 for HTTP Instance (DAS instance)
7676 for JMS
3700 for IIOP
8181 for HTTP_SSL.
3820 for IIOP_SSL
3920 for IIOP_MUTUALAUTH
8686 for JMX_ADMIN