Display Connections inside TNS subsystem.
=========================================
/TNS TNS DISPLAY CONN 

Display Listens.
================
/TNS TNS DISPLAY LISTENS

Start HPNS/IBMTCP + other Networking Tasks in TNS subsystem.
============================================================
/TNS TNS START HPNS (tcp/ip using IBM's High Performance Native Sockets)
/TNS TNS START IBMTCP
/TNS TNS START IXCF 
/TNS TNS START LU62

Stop HPNS/IBMTCP in TNS subsystem.
==================================
/TNS TNS STOP TCP
/TNS TNS STOP IXCF 
/TNS TNS STOP LU62

Start the MPMTNS subtask in the MPM.
====================================
/"SSN" ORACLE START NET.MPMTNS

 eg. /MPM1 ORACLE START NET.MPMTNS (start NPMTNS inside the MPM1 subsystem)