2. ©HCCS & IBM® 2009 Stephen Linkin 1 Network Communications on z/OS Stephen S. Linkin Houston Community College © HCCS and IBM 2009

3. ©HCCS & IBM® 2009 Stephen Linkin 2 04/27/09 Communications In z/OS  Network Communication Has Software And Hardware Aspects  Programmers And Network Technicians Must Work Together

4. ©HCCS & IBM® 2009 Stephen Linkin 3 04/27/09 Brief History Of Data Networks

5. ©HCCS & IBM® 2009 Stephen Linkin 4 04/27/09 Brief History Of Data Networks  SNA And TCP/IP On z/OS

6. ©HCCS & IBM® 2009 Stephen Linkin 5 04/27/09 Brief History Of Data Networks  Layered Network Models

7. ©HCCS & IBM® 2009 Stephen Linkin 6 04/27/09 Brief History Of Data Networks  Network Reliability And Availability  Factors Contributing To The Use Of SNA

8. ©HCCS & IBM® 2009 Stephen Linkin 7 04/27/09 Z/OS Communications Server

9. ©HCCS & IBM® 2009 Stephen Linkin 8 04/27/09 TCP/IP Overview  Using Commands To Monitor TCP/IP NETSTAT PING TRACERTE NSLOOKUP

10. ©HCCS & IBM® 2009 Stephen Linkin 9 04/27/09 TCP/IP Overview  Using Console Commands To Manage TCP/IP DISPLAY TCPIP VARY TCPIP  Using VIPA’s Availability & Load Balancing

11. ©HCCS & IBM® 2009 Stephen Linkin 10 04/27/09 TCP/IP Overview  TN3270-The Gateway To z/OS

12. ©HCCS & IBM® 2009 Stephen Linkin 11 04/27/09 VTAM Overview  Network Topologies  Subarea Network  APPN Network Topology  VTAM Topologies  Monitoring VTAM  3270 Data Stream

13. ©HCCS & IBM® 2009 Stephen Linkin 12 04/27/09 VTAM Overview  Network Topologies Supported By VTAM Subarea Advanced Peer-to-Peer Network (APPN) Subarea/APPN mixed

14. ©HCCS & IBM® 2009 Stephen Linkin 13 04/27/09 VTAM Overview  What Is A Subarea Network Topology?

15. ©HCCS & IBM® 2009 Stephen Linkin 14 04/27/09 VTAM Overview  What An APPN Network Topology

16. ©HCCS & IBM® 2009 Stephen Linkin 15 04/27/09 VTAM Overview  Summary Of VTAM Topologies  Commands To Monitor VTAM  D NET,VTAMOPTS VTAM Startup Options.  D NET,CSM[,OWNERID=ALL] Communication Storage Usage.  D NET,APPLS Status Of Defined Applications (ACBs).  D NET,MAJNODES Status Of All Major Nodes Activated By VTAM.  D NET,TOPO,LIST=SUMMARY APPN Topology Information.  D NET,CPCP Status Of APPN CP-CP Sessions.  D NET,SESSIONS Status Of Subarea SSCP-SSCP Sessions, LU-LU Sessions (Including CP-CP Sessions), SSCP-LU Sessions And SSCP-PU Sessions.  D NET,CDRMS Status Of Subarea Cross Domain Resource Managers.  D NET,EXIT Displays Status Of VTAM Exit Routines.

17. ©HCCS & IBM® 2009 Stephen Linkin 16 04/27/09 VTAM Overview  Background: 3270 Data Stream

18. ©HCCS & IBM® 2009 Stephen Linkin 17 04/27/09 Summary  Read The Redbook