title: Two oracle databases on one IP
body: <p>What I have:
  1) Oracle 11R1 services on Local system
  2) Oracle 12c services on other account</p>
  
  <p>TNS listener run from  oracle 11R1 (but also I've create one for 12c)</p>
  
  <p>As a first solution I try</p>
  
  <pre><code>A12c =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 1.1.1.1)(PORT = 1531))
      (CONNECT_DATA =
        (SERVER = DEDICATED)
        (SERVICE_NAME = A12c.1.1.1)
      )
    )
  
  
  B11R1 =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 1.1.1.1)(PORT = 1521))
      (CONNECT_DATA =
        (SERVER = DEDICATED)
        (SERVICE_NAME = B11R1)
      )
    )
  
  
  LISTENER =
    (DESCRIPTION_LIST =
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = 1.1.1.1)(PORT = 1521))
      )
      (DESCRIPTION =
        (ADDRESS = (PROTOCOL = TCP)(HOST = 1.1.1.1)(PORT = 1531))
      )
    )
  </code></pre>
  
  <p>With this configuration I could connect to 11r1 (also on 1531 port !) but nt to 12c. When I setup two listener situation was same. When I run with 12c listener I could not connect to any databases.</p>
  
  <p>Will be grateful for any suggestions.
  Thank you</p>