IBM SC41-5420-04 manual Configuring TCP/IP, What you need to know before you can configure TCP/IP

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Chapter 1. Configuring TCP/IP

This chapter explains how to configure an iSeries 400® server for Transmission Control Protocol/Internet Protocol (TCP/IP). If this is the first time that you have configured TCP/IP on an iSeries, you should read the entire chapter before performing any of the configuration tasks.

If you are unfamiliar with TCP/IP, see TCP/IP (http://publib.boulder.ibm.com/pubs/html/as400/v5r1/ic2924/info/ rzahgictcp2.htm) in the Information Center, refer to the Manuals and Redbooks topic, and select IBM redbook TCP/IP Tutorial and Technical Overview as a resource. For a complete formal description of TCP/IP, you can read the Request for Comments (RFC). Or, refer to any of the TCP/IP references that are listed on the RFC Editor Site (http://www.rfc-editor.org/rfc.html).

What you need to know before you can configure TCP/IP

Before you start configuring TCP/IP, you must ensure that the TCP/IP Connectivity Utilities for AS/400® licensed program (LP) is installed on your system. See “Installing the TCP/IP Application Programs” on page 5 for more information.

The iSeries has many commands and menus available to help you configure TCP/IP on the server. Before you begin this task, take time to review the TCP/IP Administration (TCPADM) menu, Figure 1 on page 6, and the Configure TCP/IP (CGFTCP) menu, Figure 2 on page 8.

The initial displays and menus that are shown when you configure TCP/IP on your system may not contain any entries. The sample command line interface displays in this chapter may already contain data, which was entered for the purpose of example in previous configuration steps.

Performing configuration tasks on a single network or even a simple multiple network requires that you do some planning before configuring TCP/IP on any system in that network, including an iSeries. To help you get started with setting up TCP/IP, this chapter includes complete planning details and checklists.

Once you have designed a plan, follow the step-by-step process that is outlined for you in this chapter. Each step guides you through TCP/IP installation and configuration on your system, defines various terms, and describes how these terms relate to TCP/IP.

Using the Operations Navigator interface: After initial setup and configuration, you can customize your TCP/IP through Operations Navigator. Information related to Operations Navigator is located in the online help and on the Operations Navigator (http://www.as400.ibm.com/oper_nav/index.htm) Web page. See the online help in Operations Navigator for information about the following TCP/IP functions:

vConfiguring TCP/IP, including basic functions such as starting and stopping

TCP/IP

vCreating a new Ethernet line

vCreating a new token-ring line

vWorking with TCP/IP interfaces, including configuring a TCP/IP route

© Copyright IBM Corp. 1997, 2001

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Contents TCP/IP Configuration and Reference Page TCP/IP Configuration and Reference Fifth Edition May Contents Index About TCP/IP Configuration and Reference SC41-5420 Vi OS/400 TCP/IP Configuration and Reference V5R1 Operations Navigator Prerequisite and related informationViii OS/400 TCP/IP Configuration and Reference V5R1 Page OS/400 TCP/IP Configuration and Reference V5R1 Summary of changes Xii OS/400 TCP/IP Configuration and Reference V5R1 What you need to know before you can configure TCP/IP Configuring TCP/IPGathering Information About your Network Planning for TCP/IP Installation and ConfigurationLine Description Parameters Checklist TCP/IP Planning ChecklistsInterfaces to Local TCP/IP Networks Local TCP/IP Host Information Checklist25 / Remote System Information Installing the TCP/IP Application ProgramsTcpadm Using the TCP/IP Administration MenuUsing the Configure TCP/IP Menu Cfgtcp Configure TCP/IP MenuProtocol table Configuring TCP/IP using the EZ-Setup WizardConfiguring TCP/IP using the Command Line Interface Services tableInternet address Configuring a Line DescriptionConfiguring a TCP/IP Interface Important NoteAutomatic start Subnet maskLine description Associated local interfaceDo you need to add routes at all? Configuring TCP/IP RoutesMaximum Transmission Unit MTU size Route destinationPreferred binding interface Adding TCP/IP routesDftroute None Multiple Default Routes NormalNO, *YES Adding Remote System Information Configuring TCP/IP attributesConfiguring TCP/IP Remote System Information IP Datagram ForwardingPVC None NONE, *REQUEST, *ACCEPTLind 15, *LIND, *TRANSMIT Adding an Entry to the Host Table Configuring TCP/IP Host Table EntriesWork with TCP/IP Host Table Display Bern MacianDNS SYSNAM890 LoopbackLocalhost AnyNet/400 Appc over TCP/IP Configuring the Local Domain and Host NameLocal Domain Name System DNS ServerDspmsg Qsysopr Dspmsg Qtcp Starting TCP/IP and TCP/IP ServersJob Name Description TCP/IP JobsEnd TCP/IP Endtcp Verifying the TCP/IP ConnectionSuccessful Ping Messages Verifying Additional TCP/IP ConnectionsVerify TCP/IP Connection Vfytcpcnn Verify TCP/IP ConnectionCOMP, *ESCAPE Verifying TCP/IP Connections with Host Name-ExampleVerify TCP/IP Connection Ping VERBOSE, *QUIETVerifying TCP/IP Connections with Internet Address-Example Saving Your TCP/IP ConfigurationConfiguring TCP/IP 32 OS/400 TCP/IP Configuration and Reference V5R1 Work with TCP/IP Network Status Menu Network StatusInternet Network Line Work with TCP/IP Interface StatusWork with TCP/IP Network Status Work with TCP/IP Interface StatusMaxthrput Opt Address Mask ServiceStarting TCP/IP Interfaces Internet Subnet TypeEnding TCP/IP Interfaces Display TCP/IP Route Information Display TCP/IP Route InformationRoute Subnet Next Opt Destination Mask Hop Available Bottom Route Type Opt Destination ServiceWork with TCP/IP Connection Status Type SourceWork with TCP/IP Connection Status Remote Local Opt Address Port Idle Time StateRemote Local Opt Address Port User Bytes Out TCP Ending TCP/IP ConnectionsALL Remote Local Opt Address Port TypeConfirm End of TCP/IP Connections Working with Configuration StatusTrnline Active Trnlinet Trnlitcp Qtcpip Displaying TCP/IP Network Status InformationDisplay Multicast Groups Opt Description Status JobDisplaying TCP/IP Interfaces Display Multicast Host GroupsHost Group Hardware Address MSB Displaying Associated RoutesDisplay TCP/IP Interface Status TrlanDisplaying Route Details Option Display Associated RoutesRoute Subnet Next Opt Destination Mask Hop Displaying TCP/IP Route Information Display TCP/IP Route DetailsDirect Display TCP/IP Route Information, Display 1 Display TCP Connection Status Displaying TCP/IP ConnectionsDisplay TCP/IP Connection Status, Display 2 Displaying Connection TotalsDisplay TCP/IP Connection Totals TCP/IP Host TablesHost Table Information with *NIC Files Managing TCP/IP Host TablesHost File Formats Host Table Information with *AIX FilesTips for Merging Host Tables Merging TCP/IP Host TablesHost Table Information with *AS400 Files Managing the Host Table from a Central Site Merge the File Dead Gateway Processing Negative Advice from TCP or the Data Link LayerMultihoming Function How IP Responds to Negative AdviceMultihoming Single Host, Single Network, Single Line Per physical LAN only Multihoming TCP/IP Network Example The Multihoming functionType of Service TOS X25LINELoopback None TOS Example Multiple RoutesTCP/IP Port Restriction Paolo Configuring TCP/IP Port RestrictionsUDP, *TCP OnlyGerry Related Tables and the Host Table Configure Related Tables MenuWork with Service Table Entry Display IBM Using X.25 PVC instead of SVCMulticast Restrictions Chglintrn Lindtrnline FCNADRC00000040000 70 OS/400 TCP/IP Configuration and Reference V5R1 Base Pool Size TCP/IP JobsTCP/IP Protocol Support Provided by IOP Outbound batching of TCP and UDP datagrams Running TCP/IP Only Performance Considerations Merge Host Table Performance74 OS/400 TCP/IP Configuration and Reference V5R1 Line type Configuration command Line Description Name Configuration StepsSource Service Access Point Creating the Line DescriptionDetermining the Maximum Size of Datagrams Setting the Maximum Transmission Unit78 OS/400 TCP/IP Configuration and Reference V5R1 TCP/IP Exit Points and Exit Programs Appendix B. TCP/IP Application Exit Points and ProgramsTCP/IP Application Exit Points OS/400 Registration FacilityAdding Your Exit Program to the Registration Facility Creating Exit ProgramsQAPP0100 Select your exit pointAdd your exit program Select the Add Exit Program optionYourlib Removing Exit ProgramsApplication identifier Exit Point Interfaces for TCP/IP Application Exit PointsTCP/IP Application Request Validation Exit Point Interface Required Parameter GroupLength of remote IP address Operation identifierUser profile Remote IP addressUsage Notes Length of operation-specific informationAllow operation QSYS.LIB file system pathnames are always in uppercase Command string Length of command stringPoint Character conversion option Command processor identifierQshell interpreter not installed 92 OS/400 TCP/IP Configuration and Reference V5R1 Copyright IBM Corp Trademarks Programming Interface InformationDB2 96 OS/400 TCP/IP Configuration and Reference V5R1 Index Special Characters Interface Qtgtelnets Qtsmtpsrvr Page SC41-5420-04
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