Appendix A. Configuring a Physical Line for TCP/IPCommunicationOn the iSeries 400, communication occurs through objects called lines, controllers,and devices. The communications objects for iSeries TCP/IP are the linedescriptions, the network controller descriptions, and the network devicedescriptions.TCP/IP communicates over a variety of physical line types and network interfaces(NWI). The command that defines the characteristics of the physical lineconnection or network interface depends on the type of communications adapter,as shown in Table 8.Table 8. Line Types and Network Interfaces Supported by TCP/IPLine type Configuration commandAsynchronous Create Line Description (Async) (CRTLINASC) See LinkConfiguration(http://publib.boulder.ibm.com/pubs/html/as400/v5r1/ic2924/info/rzaiy/rzaiylinkline.htm) in the Information Center. If you are usingthe Supplemental Manuals CD, then switch to the iSeriesInformation Center CD to access this information.DDI Create Line Description (DDI Network) (CRTLINDDI)Ethernet Create Line Description (Ethernet) (CRTLINETH)Frame relay Create Line Description (Frame Relay Network) (CRTLINFR)Frame relay NWIusing a frame relay,token ring, Ethernet,or DDI linedescriptionThe frame relay NWI is created using the Create Network InterfaceFrame Relay Network (CRTNWIFR) command.The line description is created using the appropriate Create LineDescription command and attached to the frame relay NWI byspecifying the NWI and NWIDLCI parameters.ISDN NWI using anX.25 line descriptionThe ISDN NWI is created using the Create Network Interface ISDN(CRTNWIISDN) command.The X.25 line is created using the Create Line X.25 (CRTLINX25)command and attached to the ISDN NWI by specifying the NWI,NWICHLTYPE, NWICHLNBR, and SWTNWILST parameters.Point-to-Point Create Line Description (PPP) (CRTLINPPP) See Link Configuration(http://publib.boulder.ibm.com/pubs/html/as400/v5r1/ic2924/info/rzaiy/rzaiylinkline.htm) in the Information Center. If you are usingthe Supplemental Manuals CD, then switch to the iSeriesInformation Center CD to access this information.Token-ring Create Line Description (Token-Ring Network) (CRTLINTRN)Twinax Create Line Description (TDLC) (CRTLINTDLC)Wireless Create Line Description (Wireless Network) (CRTLINWLS)X.25 Create Line Description (X.25) (CRTLINX25)You can describe the characteristics of the communications controllers by using theCreate Controller Description (Network) (CRTCTLNET) command or by letting thesystem create the controller automatically when you activate TCP/IP. You onlyneed one network controller to describe all the systems with which youcommunicate over any given line description.© Copyright IBM Corp. 1997, 2001 75