To Configure Listener with NETCA

 In Windows -> Startup got to Oracle - OraDB19Home1 -> Net Configuration Assistant

Click on the radio button for Listener Configuration

Click on Add

Give a name to the listener you want to configure. The default name for listener is LISTENER.

For this example I have given the name as LISTENER_1

Select the TCP protocol for configuring the listener

Sine the existing port will be listening on the default port 1521, select the radio button for 'Use another port Number' and assign a unique port number which is not in use on the server.

1523 is the port I have taken for this example

If no more listeners to be configured, Select No

Click on Next to start the Listener and Finish

In LSNRCTL you can see the listener service and status for LISTENER_1

LSNRCTL> services LISTENER_1


LSNRCTL> status LISTENER_1

Entry in listener.ora file for the same, after the configuration from NETCA is complete

LISTENER_1 =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 01HW2038611)(PORT = 1523))
    )
  )

To attach services to this listener, can make entry in listener.ora for a database SID as follows

SID_LIST_LISTENER_1 =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\ora_home)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\ora_home\bin\oraclr19.dll")
    )
    (SID_DESC =
      (GLOBAL_DBNAME = ALPHA)
      (ORACLE_HOME = D:\ora_home)
      (SID_NAME = ALPHA)
    )
  )

Stop the existing listener LISTENER_ALPHA which is currently running. 

Start the new listener LISTENER_1 In LSNRCTL it will show LISTENER_1 is started successfully.

Connecting to database with the new LISTENER_1 started you will still get below error.

For this in tnsnames.ora you simply need to change the port for your database service to the new port 1523.

ALPHA =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 01HW2038611)(PORT = 1523))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = alpha)
    )
  )

Now if you connect to the database it will connect, with the new listener configured

SQL> show parameter LISTENER
  NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
forward_listener                     string
listener_networks                    string
local_listener                       string      LISTENER_ALPHA
remote_listener                      string

To register the new LISTENER with the database you can give the following command once you connect to database as SYS user

SQL> alter system set local_listener='LISTENER_1' scope=both;
System altered.
SQL> show parameter LISTENER

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
forward_listener                     string
listener_networks                    string
local_listener                       string      LISTENER_1
remote_listener                      string
SQL>

References