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Chapter 19: Networking on z/OS. Objectives. In this chapter, you will learn: An overview of the communication network model layers The software components of the z/OS Communications Server product The difference between a VTAM subarea and APPN network topology - PowerPoint PPT Presentation
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Introduction to z/OS Basics
© 2006 IBM Corporation
Chapter 19: Networking on z/OS
Chapter 19 Networking
© 2006 IBM Corporation2
Objectives
In this chapter, you will learn:
– An overview of the communication network model layers
– The software components of the z/OS Communications Server product
– The difference between a VTAM subarea and APPN network topology
– How the IP network can be used to transport data between SNA applications.
– Commonly used TCP/IP and VTAM commands
Chapter 19 Networking
© 2006 IBM Corporation3
IBM Communications Server
ApplicationsApplications
Applications
z/OS
APPC
Sockets RPC
SNA
RPC
Sockets APPC
TCP/IP
Chapter 19 Networking
© 2006 IBM Corporation4
Open Systems Interconnect (OSI) network model
Physical Physical Physical
Data Link Data Link Data Link Control
IP ARP RARP ICMP Network Path Control
TCP UDP Transport Transmission Control
Session Data Flow Control
telnet, np, SNMP, SMTPPresentation
Applications Transaction Services
NAU Services MgrFunc. Mgmt Data Srvc
TCP/IP OSI SNA
Layered Network Models
Chapter 19 Networking
© 2006 IBM Corporation5
TCP/IP introduction
Network A Network B
pSeriesRouter
xSeriesRouter
xSeriesRouter
pSeriesWorkstation Workstation Workstation
xSeriesGateway
zSeriesGateway zSeries
Chapter 19 Networking
© 2006 IBM Corporation6
Interconnecting TCP/IP networks
Router
INTER-NETWORK
Network A Network B
Bridge
Gateway
Gateway
Router
Router
Chapter 19 Networking
© 2006 IBM Corporation7
Internet addressing
IPv4
Host A
IP Address131.12.8.2
IP Address193.15.6.4
IP Address131.12.8.1
Host BGateway
Host C
IP Address193.15.6.3
Network131.12
Network193.15.6
IP address = x.x.x.x (32 bits)= <net-ID> <host addr>
Class A = <x> <x.x.x>Class B = <x.x> <x.x>Class C = <x.x.x> <x>
IP address = x.x.x.x (32 bits)= <net-ID> <host addr>
Class A = <x> <x.x.x>Class B = <x.x> <x.x>Class C = <x.x.x> <x> network ID host
address
193.15.6 3131.12 8.2
hostaddress
network ID
Chapter 19 Networking
© 2006 IBM Corporation8
TCP/IP commands
TCP/IP Commands can be entered
– TSO ready prompt
– ISPF Command Shell
– Prefixing the command with TSO on any ISPF command line. • NETSTAT • PING• TRACERTE• NSLOOKUP• TELNET• FTP
– z/OS UNIX shell prompt (prefix “o”=command)• onetstat
Chapter 19 Networking
© 2006 IBM Corporation9
VTAM overview - the SNA environment
317x
Clustercontroller
Host processor
z/OSCICSVTAM
PCpSeries
AIX
iSeries
OS/400
zSerieszSeries
z/VM
WindowsWindows
Communicationcontroller (37xx)
Workstations
NCP
Chapter 19 Networking
© 2006 IBM Corporation10
A pure VTAM subarea network
New York City
VTAM (SSCP) Subarea Configuration
Los Angeles Chicago
PU Type 2
LU LU
NCP subarea (13)PU Type 4
NCP subarea (12)PU Type 4
PU Type 2 PU Type 2
LU LU LU LU
NCP subarea (11)PU Type 4
VTAM subarea (3)SSCP (PU Type 5)
LU (CICSTS3)LU (IM S3)
VTAM subarea (1)SSCP (PU Type 5)
LU (CICSTS1)LU (IM S1)
VTAM subarea (2)SSCP (PU Type 5)
LU (CICSTS2)LU (IM S2)
PU Type 2
LU
LU
Chapter 19 Networking
© 2006 IBM Corporation11
APPN topology
New York City
VTAM (CP) APPN Configuration
Los Angeles ChicagoPC PC
PC PC PC PC
router
VTAM APPNCP (PU Type 5)LU (CICSTS3)
LU (IM S3)
VTAM APPNCP (PU Type 5)LU (CICSTS1)
LU (IM S1)
VTAM APPNCP (PU Type 5)LU (CICSTS2)
LU (IM S2)
Internetsegment
PC
PC
internetsegment
router
Internetsegment
router
Internet and /orintranet
OSAHPR/IP
OSAHPR/IP
OSAHPR/IP
Chapter 19 Networking
© 2006 IBM Corporation12
Common VTAM commands
D NET,VTAMOPTS Displays VTAM startup options.
D NET,CSM[,OWNERID=ALL] Displays communication storage usage.
D NET,APPLS Displays status of defined applications (ACBs).
D NET,MAJNODES Displays status of VTAM activated ATCCONxx members.
D NET,TOPO,LIST=SUMMARY Displays APPN topology information.
D NET,CPCP Displays status of APPN CP-CP sessions.
D NET,SESSIONS Displays status of subarea SSCP-SSCP sessions.
D NET,CDRMS Displays status of subarea cross domain resource managers.
D NET,EXIT Displays status of VTAM exit points.
Chapter 19 Networking
© 2006 IBM Corporation13
Summary
In this chapter, you have learned:
– An overview of the communication network model layers
– Software components of the z/OS Communications Server product
– The difference between a VTAM subarea and APPN network topology
– How the IP network can be used to transport data between SNA applications.
– Commonly used TCP/IP and VTAM commands
Introduction to z/OS Basics
© 2006 IBM Corporation
Backup slides
Instructor slides with additional material
Chapter 19 Networking
© 2006 IBM Corporation15
SDLC / CICS
