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IBM s/390 manual 4.2.5 TCP/IP for OS/390

Models: s/390

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4.2.5 TCP/IP for OS/390

It is possible to share a single Ethernet LAN adapter in the ThinkPad between Linux (including the FLEX-ES Terminal Solicitor) and OS/390 TCP/IP. This requires some coordination between the FLEX-ES definitions and the OS/390 TCPIP profile data set parameters. Our goal was to assign IP address 9.12.17.211 to OS/390 TCP/IP, using the OS/390 device addresses E20 and E21 for the interface. (Our Linux IP address was 9.12.17.210.)

We included the following FLEX-ES definitions:

System definition:

channel (3) local

cu devad(0xE20,2) path(3) resource(R10A3172)

Resource definitions:

R10A3172: cu 3172 interface local(1)

options ‘ipaddress=9.12.17.211’ device(00) 3172 eth0 device(01) OFFLINE

end R10A3172

We changed the following lines in the TCPIP.PROFILE.TCPIP data set:

...
DEVICE LCS1 LCS E20
LINK ETH1 ETHERNET 0 LCS1
...
HOME 9.12.17.211 ETH1
...
GATEWAY
9	=	ETH1	1492	0.255.255.0	0.12.17.0
...

START LCS1

This specifies the use of LAN adapter 0 (sometimes known as the MPTS adapter number, from the OS/2 MPTS program). Adapter 0 is the default LAN adapter number for FLEX-ES. This number is not related to any Linux LAN number.

In order to share an Ethernet adapter with Linux, we must specify, in the resources file, the IP address to be used by OS/390. It must also be specified in the OS/390 TCP/IP profile data set, as shown here. With the specifications described here, we have these connection options from another host on the network:

TN3270 to 9.12.17.210, port 24 -- this connects to the Terminal Solicitor (assuming resadm is started. We can then select a session and should receive the USSTAB logo screen.

TN3270 to 9.12.17.211, port 23 -- this connects directly to OS/390 TCP/IP. In recent AD systems (where a USSTAB function is defined for TCP/IP) this should produce the logo screen.

telnet to 9.12.17.210, port 23 -- this connects to Linux (if telnet connections are enabled).

telnet to 9.12.17.211, port 1023 -- this connects to OS/390 Unix System Services, as an ASCII terminal (assuming you are using a recent AD system).

telnet to 9.12.17.211, port 23 -- this produces a line-mode connection (via VTAM) to TSO and is not very useful.

34S/390 PID: ThinkPad Enabled for S/390

Image 44

IBM s/390 manual 4.2.5 TCP/IP for OS/390

Contents

System setup AD CD-ROM use System operation Front coverBill Ogden ThinkPad Enabled for S/390Page October S/390 Partners in Development ThinkPad Enabled for S/390International Technical Support Organization First Edition October Contents Contents4.3 Shutting down Chapter 6. Frequently asked questionsiv S/390 PID ThinkPad Enabled for S/390 Index ContentsSpecial notices vi S/390 PID ThinkPad Enabled for S/390 The author PrefaceSpecial notice IBM trademarks Comments welcomeChapter 1. Introduction 1.1 Purpose of this redbook 1.2 ThinkPad/EFS systems1.2.1 FLEX-ES 1.2.2 Linux 1.2.3 Positioning with other small S/390s1.3 ThinkPad/EFS hardware used 1.4 Terminology Chapter 2. System and Linux installation 2.1 Disk planningDifferences 2.3 Linux installation 2.2 ThinkPadPartition Manually Partition Mount PointThe installation prompts continued with fairly basic items Page 2.3.1 Installation notes etc/xinetd.d # vi telnet# ps -ef grep xinetd # kill -s USR1 pidnumber14 S/390 PID ThinkPad Enabled for S/390 Chapter 3. FLEX-ES and OS/390 installation 3.1 FLEX-ES 3.1.1 Brief introductionPC Processor in ThinkPad 18 S/390 PID ThinkPad Enabled for S/390 3.1.2 Installation 20 S/390 PID ThinkPad Enabled for S/390 Installing the FLEX-ES license key3.1.3 3.2.1 AD systems 3.2 OS/390 AD systems3.1.4 Next steps 3.2.2 OS/390 on CD-ROM Basic CD-ROM formats3.2.3 OS/390 device configuration FLEX-ES formats3.2.5 Installation tasks Unzipping and installing AWSCKD CD-ROM filesUnzip and convert a volume 3.2.4 An unzip programLoad the other CDs 3.4 Minor problems3.3 File ownership Files unzip in wrong order Volume in two separate zip files3.4.1 Next steps Chapter 4. FLEX-ES Operation 4.1 FLEX-ES system and resource definitions Comments4.1.1 Building a shell script $ sh shos flexes ipl a80 0a82cs 4.1.2 IPL OS/390 Terminal Solicitor4.2 Operation and use 4.2.1 User terminal connection4.2.4 System performance monitors 4.2.2 Linux TN32704.2.3 IODF requirements 4.2.5 TCP/IP for OS/390 4.3 Shutting down 36 S/390 PID ThinkPad Enabled for S/390 Chapter 5. Additional Topics Copyright IBM Corp5.1 Basic debugging 38 S/390 PID ThinkPad Enabled for S/3905.4 Server memory 5.2 Operating Systems Messages console5.3 Security 5.4.1 The vmstat command 5.4.2 Importance of Linux swapping 5.5.1 Using a second Linux hard disk 5.5 Ultrabay5.5.2 Second disk planning 5.5.3 Disk layout AD system 5.6 FLEX-ES FakeTape on OS/390 5.5.4 Alternative method3,222222 46 S/390 PID ThinkPad Enabled for S/3902,560 5.7 Multi-system setup 5.8 x3270 client 5.9 Remote resources # cd /usr/lib/X11/app-defaults# cp X3270 X3270old # vi5.10 Disk caches System ASystem B System CHere is an example that uses all three options 5.11 Tuning cachesize 5.12 FSI Channel Adapters5.14 Disk fragmentation 5.15 Backup and restore considerations5.13 SCSI adapter for the ThinkPad 5.15.1 Using tar to back up S/390 volumes 5.15.2 Using tar and ftp 5.16 S/390 identification 5.15.3 CD-RW drive5.17 Display PSW and registers 5.18 RAS discussion5.19 Verify ckd disk 5.20 Linux windows5.21 Installing FLEX-ES upgrades 5.22 ThinkPad power control5.23 Useful Linux commands Common commandsCD-ROM Multiple consoles, sessions, screensText editors 62 S/390 PID ThinkPad Enabled for S/390 Chapter 6. Frequently asked questions Q Can I run a ThinkPad in 24x7 operation? 24 hours/day, 7 days/week A Yes Q How do I order a ThinkPad/EFS system? What if I am not a PID member? Q What is the difference between swapping and paging? Q How long does the ThinkPad battery last? Appendix A. FLEX-ES definition listings Basic definitions for a single HDDShell script for a single HDD 70 S/390 PID ThinkPad Enabled for S/390Definitions for two HDDs Appendix A. FLEX-ES definition listingsShell script for two HDDs 72 S/390 PID ThinkPad Enabled for S/390Appendix B. FLEX-ES parameters System definitionschannel3 local channel1 local 74 S/390 PID ThinkPad Enabled for S/390cpu0 cpu1 cpu2 Resource definitions Emulated control unit types76 S/390 PID ThinkPad Enabled for S/390 Emulated device typesTypical resource definitions CKD disk resources resourcename cu cutype parameters end resourcename3270 terminal resources Tape resources LAN resources$ echo ‘mount 703 bills’ flexescli localhost S10A $ echo ‘mount 704 @9.12.17.211’ flexescli localhost S10ACloned devices 80 S/390 PID ThinkPad Enabled for S/390The resadm command Common rulesCLI commands Here are a few brief notes concerning CLI commands 84 S/390 PID ThinkPad Enabled for S/390 Special notices through The Open Group How to get IBM Redbooks Numa-Q Enabled for S/390 Technical Introduction, SG24-6215S/390 Partners in Development NetFinityEnabled for S/390, SG24-6501 FLEX-ES Concepts, FSIMM020 FLEX-ES Technical FAQ, FSIMM040IBM Redbooks collections 88 S/390 PID ThinkPad Enabled for S/390Numerics SymbolsIndex Page Page 92 S/390 PID ThinkPad Enabled for S/390 S/390 Partners in Development ThinkPad Enabled for S/390 0.2”spine 0.17”-0.473” 90-249 pagesPage Page System setup AD CD-ROM use System operation Back coverThinkPad Enabled for S/390 S/390 Partners in Development