z/OS Basic Skills Information Center. Networking on z/OS

• Publisher: IBM Corporation
• Year: 2010
• Tongue: English
• Leaves: 268
• Category: Library

✦ Table of Contents

Contents
Before you begin the topic about networking on z/OS
Part 1. Introduction to networking on the mainframe
Chapter 1. Mainframes and networks
Mainframes, networks, and you
Networks and online systems
Why are networks important?
Examples of mainframe-based networks
Technology choices abound in network technology
Who supports the network?
What are the basic elements of a network?
Overview of mainframe network capabilities
z/OS Communications Server
SNA and TCP/IP on z/OS
Security in a network
Data protection in a mainframe network
Availability of a mainframe network
Chapter 2. Network layers and protocols review
Networking terminology
Network layers
Physical media, layer 1
Network interface card (NIC)
Data link layer, layer 2
Ethernet
Media access control (MAC) addressing
Network layer, layer 3
Address Resolution Protocol (ARP)
Network types
Virtual LAN
Network routing
Routing tables and protocols
Internet Control Message Protocol (ICMP) and other layer 3 protocols
Transport layer, layer 4
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Sockets
Network applications
Network security
Systems Network Architecture (SNA)
Chapter 3. Hardware connectivity on the mainframe
Channel subsystem (CSS)
The mainframe channel subsystem and network links
Hardware channels
Channel command word (CCW) channels
Parallel channel
Enterprise System Connectivity (ESCON) channel
Fiber connection (FICON)
Channel-attached network devices
Coupling channels
Open Systems Adapter (OSA)
Queued Direct I/O (QDIO)
Non-QDIO mode
OSC mode
Open Systems Adapter for NCP (OSN)
HiperSockets
The I/O cage
Chapter 4. Sample network configuration
Requirements for a mainframe network
Example: the ZOS Company data center
Key mainframe network availability aspects
Hardware availability
Software availability
Part 2. TCP/IP implementation on the mainframe
Chapter 5. TCP/IP on z/OS
The TCP/IP daemon
The TCP/IP profile
TCP/IP Profile statements
Link configuration
IP configuration
TCP configuration
Static routing information
Automated IP application monitoring
Generic servers and multiple TCP/IP instances
The FTP server
The telnet daemon
A good resolver is hard to find
How an application searches for resolver configuration information
Resolver address space
Type of application (MVS or z/OS UNIX)
The search order for resolver configuration information
The multi-stack environment
TCP/IP clients
Chapter 6. TCP/IP in a sysplex
Computer cluster
The z/OS sysplex
Cross-system Coupling Facility (XCF)
Workload Manager (WLM)
Dynamic virtual addressing
Unique application-instance DVIPA
Multiple application-instance DVIPA
Dynamic cross-system coupling
Sysplex distributor
Sysplex distributor roles
TCP/IP definitions for sysplex distributor
An example of distributed connections
Controlling distribution of work in a network
How work can be distributed to the network
Problem detection and recovery in the cluster
The routing function in a sysplex
Network interface card
Part 3. SNA and SNA/IP implementation on the mainframe
Chapter 7. Systems Network Architecture - basics and implementation
What is Systems Network Architecture (SNA)?
The evolution of SNA
Subarea networking
SNA nodes
System services control point (SSCP)
Subareas and domains
Connecting subarea nodes
Architectural components of the SNA network
Path information unit (PIU)
How LU-LU sessions are initiated
Class of service (CoS)
VTAM subarea definitions
VTAM start options
VTAM configuration lists
How VTAM resources are defined
Sift-down effect
Sample VTAM network
Chapter 8. SNA Advanced Peer-to-Peer Networking (APPN)
Introduction to APPN
Advanced Program-to Program Communications (APPC)
Advanced Peer-to-Peer Networking (APPN)
APPC versus APPN
APPN node types
Low-entry networking (LEN) nodes
End nodes (EN)
Network nodes (NN)
Specialized network node types
Specialized VTAM Nodes
Control point (CP-CP) sessions
APPN databases
Topology database (TOPO DB)
Directory services database (DS DB)
APPN network topology
Topology data update (TDU) flows
How directory services locate resources in APPN
Broadcast search
Directed search
How a CDS minimizes broadcast searches
Route calculation in APPN
Transmission group (TG) characteristics
Class of service (CoS)
High performance routing (HPR)
Rapid transport protocol (RTP)
Automatic network routing (ANR)
HPR headers
Path switching
Connection networks
Dependent LU requester/server (DLUR/DLUS)
Defining a VTAM APPN network
Defining data sets and VTAM startup JCL
Creating definitions in ATCSTRxx
Defining VTAM major nodes
Chapter 9. SNA/IP implementation
Background on SNA/IP implementation
DLSw and Logical Link Control 2 (LLC2)
How an LLC2 connection is established over a LAN
Data link switching (DLSw)
How SDLC devices are connected using DLSw
DLSw configuration
Enterprise Extender
Why does Enterprise Extender use UDP packets?
Enterprise Extender on z/OS
Class of service (CoS) and type of service (ToS)
EE implementation in non-z/OS remote sites
Internet connectivity exploitation and Enterprise Extender
A comparison of Enterprise Extender and DLSw
Enterprise Extender implementation
SNA/IP configuration examples
Enterprise Extender configuration
Extended border node configuration
Cisco SNASw definitions
Chapter 10. TN3270 Enhanced
Introduction to the 3270 terminal
3270 data stream
TN3270 Enhanced (TN3270E)
Telnet protocol and SNA meet
TN3270E description
Additional TN3270E functions supported in z/OS
Where to place a TN3270E server
TN3270E server implementation
TELNETPARMS statement block
BEGINVTAM statement block
VTAM setup for TN3270E server
Part 4. Network operations and administration
Chapter 11. Network operational tasks
Network startup
VTAM startup
TCP/IP startup
How the network is stopped
z/OS network administrator tasks
Examples of managing VTAM
Examples of changing VTAM resources
Examples of managing TCP/IP
Examples of controlling TCP/IP applications
TN3270E server
Network environment documentation
Chapter 12. Network security
About security
TCP/IP security
Industry standard network security features
Application layer security
Transport Layer Security (TLS)
Virtual Private Network
Application Transparent TLS
OpenSSH
TCP/IP on z/OS security features
Intrusion Detection Services (IDS)
The System Authorization Facility (SAF) in a network context
More port control
IP filtering
More network security options
TN3270 security
SNA security
Chapter 13. Network problem determination
Determining the network problem
Network tools and diagnostic aids
Common (z/OS-wide) tools and diagnostic aids
VTAM tools and diagnostic aids
TCP/IP tools and diagnostic aids
Tracing TCP/IP components
Diagnostic TCP/IP commands
VTAM problem determination
TCP/IP problem determination
Communications Storage Manager (CSM)
Debugging CSM
Commands used to monitor CSM
Network performance and tuning
Part 5. Appendixes
Notices
Programming interface information
Trademarks
Related publications