z/OS Communications Server Part 2 - Implementing TCP/IP under z/OS

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UK Start Times

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What do I need?

• webcam
• headphones with microphone
• sufficient bandwidth, at least 1.5 Mb/s in each direction.

What you will learn

On successful completion of this course you will be able to:

• describe the structure, operation and the addressing mechanisms used in a TCP/IP network
• list the major configuration steps involved in customising TCP/IP for z/OS and explain the Security Server customisation required in z/OS
• explain the purpose and use of Virtual IP addressing (VIPA) and explain how to code for both a static and dynamic VIPA configuration
• explain the purpose and use of Distributed VIPAs and the need for Sysplex Distributor
• describe and define devices to TCP/IP for z/OS and explain how to define the TCP/IP for z/OS host IP address(es)
• describe and define the purpose and customisation of the DATA dataset and RESOLVER
• define the host name, domain name and DNS information
• describe and define the HOSTS file and the SERVICES dataset
• explain the configuration of the TN3270 server and the SNA gateway and explain the VTAM configuration required to support the gateway
• implement a VTAM USS table for TN3270 users
• describe and define the Telenet servers, INETD and SSHD
• describe and define the operation and customisation of the FTP server and its major security features
• explain the differences between SFTP and FTPS
• explain and define the operation and customisation of the CSSMTP server and OMPROUTE server
• describe the purpose and use of the major TCPIP, TSO and USS commands
• explain how to start, stop and interpret a TCP/IP packet trace and a component trace using IPCS and WireShark
• explain and define the purpose of the Enterprise Extender
• explain and define the structures required in a Parallel Sysplex for TCP/IP High Availability.

Who Should Attend

This course is designed for network technicians, systems programmers and technical managers who need a thorough understanding of how TCP/IP for z/OS is installed and configured.

Prerequisites

Attendance on the courses TCP/IP Fundamentals and z/OS Communications Server Part 1 - Implementing APPN and VTAM or equivalent experience. A familiarity with UNIX on z/OS is also required and some z/OS systems programming experience is needed.

Duration

4 days

Fee (per attendee)

£2300 (ex VAT)

This includes free online 24/7 access to course notes.

Hard copy course notes are available on request from rsmshop@rsm.co.uk

at £50.00 plus carriage per set.

Course Code

CTMZ

Contents

TCP/IP Review

What is TCP/IP?; Why are we interested in TCP/IP?; What does TCP/IP comprise?; Internetworking principles; IPv4 addressing; IPv4 subnetting; IPv4 variable subnetting; Network Address Translation; One to One NAT; Network Address Port Translation (NAPT); TCP/IP protocol stack; IPv4 Address Resolution Protocol; IPv4 Dynamic Host Configuration Protocol; Why IPv6?; IPv6 addressing; IPv6 prefixes and address types; Global unicast address format; Anycast address; Multicast address; Required host information; Port numbers; IPv4 Transport Protocol message formats; IPv4 Internet Protocol: message format, packet format, header format; Extension Headers; IPv6 Routing Header; IPv6 fragmentation header; IPv6 options header; Internet domain names; Internet domain name hierarchy; Common user application; Common system applications.

An Overview of TCP/IP on z/OS

TCP/IP for z/OS; TCP/IP access to SNA applications; How the gateway works; SNA access to TCP/IP applications; Communications Storage Manager ; Device connectivity and attachments; Direct vs indirect attachment; Direct attachment problem; Virtual IP addressing - the solution; Sharing attachments across LPARs; UNIX Systems Services considerations.

TCP/IP for z/OS Installation

UNIX Systems Services prerequisites; Security Server prerequisites; Communications storage manager; Datasets required; TCP/IP and TN3270 procedures; Required host information; Customising the DATA dataset; DATA dataset syntax; Association with the TCP/IP stack; Specifying the Host Name and Domain Name; Specifying the name server parameters; A typical DATA dataset; RESOLVER: procedure, files, other statements; CINET GLOBALTCPIPDATA; TCPIP.DATA search order; VTAM TRL Major Node; Servers and devices; HCD definitions; Sysplex distributor; z/OS libraries required; 'Must Have' reference manuals; Nice to Have' reference manuals.

TCP/IP for z/OS - Command Overview

Available TCP/IP commands; The START and STOP commands; The MODIFY command; The DISPLAY command; The VARY command; The OBEYFILE command; The NETSTAT and onetstat commands; NETSTAT command options.

Basic Profile Definitions

Customising the PROFILE dataset; PROFILE dataset syntax; Device interface properties; Statements that define an interface; The basic DEVICE statement; The basic LINK statement; Defining LCS devices; Defining CLAW devices; OSAs, Hipersockets and Channel Attached Routers; OSA diagnostic device; QDIO and non-QDIO; OSA Express CHPID definitions; Adding an OSA Control Unit and device; Adding OSAD device; Hipersockets; Hipersockets definition; CHPID Type IQD; MTU sizes; Channel Attached Routers and Servers; Defining MPCPTP devices; Defining MPCIPA devices; The HOME statement; The START statement; INTERFACE - IPAQENET OSA-Express QDIO interfaces statement; Syntax for INTERFACE - IPAQENET OSA-Express QDIO; Syntax for INTERFACE -- IPAQIDIO HiperSockets interfaces statement; The routing statements; Subnetting - a reminder; The GATEWAY statement; The BEGINROUTES statement; The BSDROUTINGPARMS statement; Variable subnets and GATEWAY; Variable subnets and BEGINROUTES; Operational statements.

VIPAs and Sysplex

VIPAs; Static VIPA; Dynamic VIPA; Virtual IP addressing - a reminder; Defining VIPA devices; Specifying the source IP address; Syntax for INTERFACE -- VIRTUAL interfaces statement; Examples of the INTERFACE statement for VIPA; IP solutions in a sysplex; Communication paths in a Sysplex; DynamicXCF transport choices; IUTSAMEH; XCF Groups and their usage; Display XCF groups; DYNAMICXCF; DYNAMICXCF & HiperSockets; Dynamic VIPA - introduction; Dynamic VIPA takeover; Stack-managed DVIPA; Non-disruptive dynamic VIPA takeback; Application-specific DVIPA; IOCTL or Command-Activated DVIPA; Dynamic VIPA statements; MODDVIPA (EZBXFDVP) utility; Dynamic VIPA usage; When does the DVIPA move?; Load balancing and availability; Sysplex Distributor; How the Sysplex Distributor works; Backup capability; Recovery; The role of dynamic routing with Sysplex Distributor; Sysplex Distributor and policy; Sysplex Distributor and MNLB; Connection Optimizing DNS; nformation flow overview; DNS weights; DNS/WLM registration; Starting the DNS server; Distributed VIPA - introduction; Distributed VIPA statements; Single system IP perspective of the sysplex; TCPSTACKSOURCEVIPA / SYSPLEXPORTS; CFRM policy example.

Other Datasets Needed

The SITE dataset; The SERVICES file.

Server Customisation

Configurable servers; TN3270 server customisation steps; Updating the TN3270 started task JCL; TelnetGlobals statement; Reducing demand for ECSA storage; The TELNETPARMS statement; The PORT statement; The BEGINVTAM statement; The VTAM application major node; Defining a USS table; Identifying the USS table in the PROFILE dataset; The UNIX Telnet server; Customising the INETD Server; Starting INETD and Telnet; SSHD UNIX files; SSHD - Using ICSF and /dev/random); SSHD - Creating configuration files; SHD - Creating SSHD server keys; SSHD - Set up SSHD server userids; SSHD - Create SSHD server started task; SSHD - TCP configuration; SSHD - Verify z/OS DNS / Resolver operation; The FTP server; FTPS and SFTP; Pros and cons of FTPS and SFTP; Customising the FTP.DATA dataset; Customising the PROFILE & SERVICES datasets; Starting FTP; SYSLOGD; SYSLOGD -/dev/console and /dev/log; SYSLOGD - create the syslog daemon configuration file; SYSLOGD - create empty syslog output file; SYSLOGD - port and services assignments; SYSLOGD started task JCL; OMVS startup; SYSLOGD RACF definitions; OMPROUTE; OMPROUTE - configuration file; OMPROUTE reserve the ports; OMPROUTE - update the RESOLVER configuration file; OMPROUTE - started task JCL; OMPROUTE services port numbers; OMPROUTE - RACF definitions; OMPROUTE - SYSLOGD; OMPROUTE - static routes; OMPROUTE - Configure OSPF authentication; CSSMTP v SMTPD438; SMTPD to CSSMTP migration considerations; Installing CSSMTP with Started Class procedure: RACF OPERCMDS CLASS, Additional security if required; The CSSMTP Configuration file; Resolver Search; Starting CSSMTP; Customising other servers; Enterprise Extender; z/OS services for SNA traffic; PPN parameters in startup options; Implementation considerations; TCP/IP implementation; DYNAMICXCF; IUTSAMEH; DYNAMICXCF & HiperSockets; Modifications to TCP/IP profile; Modifications to OSPF interface; Proof of initialisation of IUTSAMEH; VTAM implementation; Defining the XCA HPRIP major node; Defining model major nodes for EE connections and RTP pipes; Defining switched Pus for EE connections.

Problem Determination Considerations

Problem determination tools; The PING and OPING commands; The TRACERTE and the OTRACERT commands; TCP/IP SYSLOG output; TCP/IP packet trace overview; Starting a packet trace; The external writer procedure; Stopping a packet trace; Analysing a packet trace with IPCS; Non-z/OS packet traces; TCP/IP component trace overview; Starting and stopping a component trace; Analysing a component trace via IPCS; Analysing a component trace; Other available traces; Packet trace.