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IBM AS/400 Network Router User Manual

1. For information about the SDLCLIN parameter see Specifying the SDLCLIN parameter for 3651 retail controllers The following table describes how to coordinate values for parameters on the AS 400 CRTLINSDLC and CRTCTLRTL commands with bits that are specified for the 3651 SDLCLIN parameter The SDLCLIN parameter is specified as a series of 8 bits designated 0 through 7 01234567 The default value for the SDLCLIN parameter when used with an SDLC line is 01100001 or hex 61 The default value for each bit is underlined in the Bit Value column To configure the AS 400 to a 3651 controller use the following table SDLCLIN Bit Bit Value AS 400 Parameter and Value Notes 0 0 None Data terminal ready There is no equivalent parameter for the AS 400 system Specify 0 to on when the controller is powered on or 1 to indicate that the DTR is off when the controller is None powered on This bit should be set to 1 only if the configuration being defined includes IBM world trade data communications equipment DCE in a switched network indicate that the data terminal ready DTR signal is NRZI NO Specify 1 if the data communications equipment DCE provides the clocking or if NRZI data k NRZI YES encoding is used Chapter 7 Communicating with remote workstation controllers 69 AS 400 Parameter SDLCLIN Bit Bit
2. RMTNETID LCLNETID RMTNETID specified on the local AS 400 system device description must match the local network ID specified in the network attributes of the remote AS 400 system Single session SNGSSN SNGSSN For Element 1 single session device description this parameter must match on both the local and remote APPC device Note If you want a value other than NO for APPN devices this value must be configured on the QAPPNRMT configuration list For Element 2 number of single session conversations this parameter does not need to match the remote device For more information on AS 400 parameters see the I Connecting one AS 400 to another AS 400 system Configuration parameters must be coordinated when you specify controller device and line descriptions for the local and remote AS 400 Example 1 AS 400 to AS 400 using X 25 Chapter 6 Communicating with a remote AS 400 system 37 This example shows the matching parameters between an AS 400 connecting to another AS 400 that uses X 25 AS 40 Bao CRILINA2S LINDERZSLINE RS RICHAME LING 1 LGLCHLE 002 SyCBOTH EGLCHLEN oi eae ecen I LGLCHLE OGA FSWCBOTH NETADRC 47971013 2 CHHINITYLOCAL EXCH ID O56EEEEE 1 CRICTLAPRC CCTLD BACLT LINKTYPE x25 SWITCHEDEFTES APPH C HO SWTLINLST RZSLINE FMTNETIDENONE EXCH IDEOSEFFFFF 4 CHHNER 47911140 3 ROLE SEC
3. 5 CRTDEYAPPE DEYDEABAODE vol AM TLOCHAME 15 400BU3 e 3 LOLLOCHAME 35404 e 7 FMTNETIDENONE ETLEABANCTL MODE BLANK APPHC HO HALL HAME BLANK 9 Example 2 AS 400 to AS 400 using SDLC 38 Version 5 ASAGO Bad CHTLINAZE LINDERZSLINE RSFICHAMEELINGSL LGLCHLE O01 PYC LGLCHLE 002 SVCBOTH LELEHLE aa eerie east LGLCHLE OOS SWCBOTH 3 a HNETADR 47911140 CNN INIT LOCAL 4 EXCHIDCOS6F FFFF CRICTLAPPC CTLO XB 20CLT LINKTYPE 25 SWITCHEDEFYES APP C HO SWTLINLST X25L INE PMTWE TIC WONE 1 EICH ID O56EEEEE 2 9 CNNNBRE 47971013 5 ROLE PRT CRIDEVWAPPC DEYD RB 2ODE VOL 7 PM TLOCNAME XS 400BU4 8 LCLLOCNAME XS 400BU3 4 AMTHE TIC HOHE CTLEXB2OCTLI MODE ELANK AFFPHE YNO MODE 9 4 NAME BLANK Av4Tzcs c This example shows the matching parameters between an AS 400 connecting to another AS 400 that uses SDLC AS fag EC CRTLINSDLC LIND S400L INE RSRCNAMESLINO1 2 ROLE S EC 1 EXCHID 05600401 2 LINESPEED 19200 MODEM 1BMLPDAL CRICTLAPRC CTLOCS4008DLC LINKTYPE SDLC APPHC NO LINE S400L INE PMTNE TIDY NONE EXCHID 05600400 3 ROLE PRI _ 4 STHADRE C1 5 CRITE VAPRC DEVOCS4O0DE WOLY AM TLOCHAME ASAO0BLS 6 LOLLOCHAME AS 400BU1 7 FMTNETIDE NONE CTLES4005DL0 MODE BLANK 8 APPH HO
4. 94 Version 5 Note SDLC supports traditional AS 400 communication protocols such as APPC but does not support TCP IP X 25 network X 25 is a Telecommunications Standardization Sector ITU T recommendation that defines the physical level physical layer link level data link layer and packet level network layer of the OSI reference model A X 25 network is an interface between data terminal equipment DTE and data circuit terminating equipment DCE that operates in the packet mode which is connected to public data networks by dedicated circuits X 25 networks use the connection mode network service An AS 400 X 25 line can be connected through a packet switching data network PSDN and an adjacent remote system by using either a nonswitched or switched physical line A switched line connection is one that is established on demand between the AS 400 system and the X 25 network On nonswitched line connections the AS 400 system supports both switched virtual circuits SVCs and permanent virtual circuits PVCs Only SVCs are supported on switched physical lines One X 25 line supports one or more virtual circuits Each virtual circuit can support one of the following One or more Systems Network Architecture SNA sessions that can include Advanced Program to Program communications APPC SNA upline facility remote work stations or finance communications e One connection to an asynchronous communications host system the pr
5. AS fdoQ FSC CRTLINSDLC LINDE S400L INE RSRCNAME LING 21 1 ROLE PRI 3 FXCHID 06600401 LINESPEED 192000 M DEM IEMLFDA1 CRTETLAFPC CTLOCS4008DL03 LINKTYPE SDLCN APPHC NO LINE S400L INE PMTNE TIDY NONE 2 9a EICH ID 05600401 4 a R LE SEC 5 4 STWADRICL CRIDEWAPPC DEWOCS400DE WOLY 7 FHTLOCHAME ASAO0BLI1 6 LCLLOCHAME AS 400BL3 FMTNETIDE NONE CTLES4005DL0 8 MODE BLANK APPH HO Ad T208 1 Example 3 AS 400 to AS 400 using one way automatic dialing This example shows the matching parameters between an AS 400 connecting to another AS 400 that uses one way automatic dial function Chapter 6 Communicating with a remote AS 400 system 39 AS do0 Bau Line Description LINSBLC LINDCADLINGI 14 RSRICNAME LINOL 1 ROLE HEG CMHC S TPR EXCHID OS6FFFFF 3 LINESPEED 2400 5 SWTCHH DLAL 6 AUTOANS CO 7 AUTODIAL VE5 amp DIALCHDE 25 B15 STHADREBL 1 Controller Descr CTLAPPC CTLOCADAS ABLE LINKTYPE 3DLC 9 SWITCHED V ES APPH Ho 10 SWTLINLSTCADLINGI 1 EXCHIDCGOSGEEEEE 4 CHNNBR 1234567 ROLE HEG STHACR B11 1 Device Description DEVAPPC DEVOCADAS 4603 FMTLOCHAME CADACOBLIS te 11 LCLLOCHAME ADAGOBLd He 12 ETLLEADASABUS MODE BLANK 13 APPH C HO 10 40 Vers
6. Dependent location name Matches the LU name on the LU definition on VTAM Chapter 5 Communicating with host systems 31 Note This must match the VTAM LU name with the corresponding local location address LOCADDR on VTAM For more information on DLUR see Dependent LU Requester Support DLUR 32 Version 5 Chapter 6 Communicating with a remote AS 400 system Using advanced program to program communications APPC you can configure the AS 400 system to communicate with another AS 400 system This configuration requires the coordination of configuration parameters and values Only those configuration prompts and parameters that require coordination on both the AS 400 and the remote AS 400 system are listed In addition some of the parameters that are listed may not apply to your particular configuration See the following topics for more information For more information on AS 400 parameters see the K Matching AS 400 line description parameters for a remote AS 400 system You must coordinate communications configuration parameters between local and remote AS 400 systems These parameters are described in the following table This table shows those prompts and parameters that must be coordinated when you specify line descriptions for the local and remote AS 400 systems To configure a local AS 400 to a remote AS 400 A for an example of connecting one AS 400 to another AS 400 system e Use the following table for
7. For more information about APPC Over TCP IP Configuration see the APPC Programming book A For more information about IPX Support see the lnterne For related information about AnyNet see AnyNet communications for the AS 400 system AnyNet is an IBM implementation of the Multiprotocol Transport Networking MPTN architecture such as AnyNet 2 and AnyNet Multiple Virtual Storage MVS AnyNet capability allows applications and associated services that use application programming interfaces such as sockets intersystem communications function ICF or CPI Communications the flexibility to use alternative network protocols such as Systems Network Architecture SNA or TCP IP AnyNet is a family of products that allow applications that 14 Version 5 are written for one type of network protocol to run over a different type of network protocol For example without AnyNet your choice of application program interface API dictates your choice of network protocol or your choice of network protocol dictates your choice of APIs AnyNet allows you to mix and match applications with network protocols In fact you can do this without changing your application programs Your destination address such as a remote location determines the type of network protocol to use e AnyNet 400 Sockets This support converts TCP IP addresses to SNA addresses that are based on tables that are configured by the network administrator Programs supported in
8. H EXCHID 07300001 LGLCHID 002 Automatically created Remote Work Station Controller Description CTLD CHISARMT TYPE 5494 LINKTYPE NONE RMTLOCNAME CHI5494 LCLLOCNAME NETATR FMTNETID NETATR Automatically created DWS Display Device Description DEYD CHISDSPOO CTL CHISSRMT LOCADR 00 Automatically created DWS Printer Device Description DEYD CHISPRT14 CTL CHISSRMT LOCADR 14 H1 1 RCHAS218 H1 2 CHINET H1 6 001 5494 Controller DWS Configuration Screen 2 Network Information 11 CHINET Default local network name 12 CHI5494 5494 LU name 13 CHI5494 5494 CP name 14 ORMTWSC 5494 default mode name AS 400 LU name AS 400 network name AS 400 logical channel DWS Configuration Screen 1 AS 400 connection AA u X25 DD 1 Token ring gateway 2 01 5494 station address 4 0 027 X 25 subscription data Circuit type 5 1 1000 X 25 configuration 6 All defaults X 25 software data 7 All defaults Retry parameters K 40005494E000 5494 token ring address Twinaxial independent work station using DOS Client Access 400 CONFIG PCS SFLR 1 1 RCHAS218 RTLN CHINET DOSTWX1 RTYP 5250 EMLI RCHAS218 2 Token ring independent work station using DOS Client Access 400 CONFIG PCS SFLR 1 1 RCHAS218 RTLN CHINET DOSTRN1 RTYP ITRN TRLI RCHAS2 18 40005495E000 CHISDSPOO Port 0 Address 0 CHI5SPRT14 Port 2 Address 6 RV4T211 0 Chapter 7 Communicating
9. server iSeries Networking iSeries Communications Management Copyright International Business Machines Corporation 1998 2001 All rights reserved US Government Users Restricted Rights Use duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp Contents Part 1 Getting started with AS 400 communications Chapter 1 Print this topic Chapter 2 Configuring AS 400 for communications Creating a network interface description Creating a network server description Creating a line description Chapter 3 Optimizing communications performance Improving wide area network performance Adjusting WAN protocols for optimum AS 400 performance Adjusting the WAN line speed for optimum AS 400 salle WAN line speed considerations for IOPs 3 f Improving local area network performance Adjusting LANs for optimum communications performance Adjusting LAN lines for optimum communications performance LAN line speed considerations for IOPs Improving data path performance s Considerations for subsystem configuration for error recovery performance Communications performance considerations for interactive jobs Communications performance considerations for batch jobs Mixing interactive and batch jobs on a WAN line Performance considerations for AnyNet communications Subsystems Chapter 4 Communications applications User written APPC applications i Distributed data management DDM Ap
10. CRTCTLAWS LINKTYFE LAN ADPTADR 40003 17 40004 Ru4Tzir 0 Matching AS 400 parameters for finance controllers You must coordinate several parameter values that are specified for the AS 400 system and in the controller configuration for finance communications Matching AS 400 parameters for 470x finance controllers You must match the AS 400 configuration parameters with the configuration CPGEN for the 4701 and 4702 finance controllers These parameters are described in the following table AS 400 prompts are listed in alphabetical order by parameter name the AS 400 commands on which the parameters are specified are included in the rightmost column of the table For more information about configuring the 4700 controllers see Volume 6 of the 4700 Finance Communication System Controller Programming Library GC31 2068 To configure the AS 400 to a 470x finance controller 67 for an example of connecting an e Use the following table to connect an AS 400 to a 4701 finance controller 62 Version 5 AS 400 Prompt AS 400 Parameter 4700 Macro 4700 Parameter Connection type CNN COMLINK ACB For SDLC finance communications if the line is switched CNN SWTPP on the CRTLINSDLC command or SWITCHED YES on the CRTCTLFNC command include the SWM value on the ACB parameter ACB SWM Exchange identifier EXCHID X25CKT XID The values specified for the 4700 and the AS 400 system must matc
11. Procedure or library name is greater than 8 characters Current library not found Not authorized to current library Not authorized to QS36PRC in current library Not authorized to procedure in current library Not authorized to System 36 environment library Not authorized to file QS36PRC in System 36 environment library Not authorized to procedure in System 36 environment library Not authorized in library QSSP Not authorized to file QS36PRC in QSSP Not authorized to procedure in QS36PRC in QSSP Unexpected return code from System 36 environment support Problem phase program not found in QSSP Not authorized to problem phase program in QSSP Maximum number of target programs started 100 per System 36 environment System logic error Function check or unexpected return code encountered while processing a program start request Temporarily unable to allocate needed resources for a program start request No subsystem accepting program start requests for this device 86 Version 5 Chapter 9 Networking concepts If you would like more information on networking topics review the following Advanced Peer to Peer Networking Advanced Peer to Peer Networking APPN is one type of data communications support that is provided by the AS 400 system This support routes data in a network between two or more advanced program to program systems The systems do not need to be directly connected in the same network or adjac
12. QBASE Used for both interactive and communications batch jobs QCMN Used for communications batch jobs QSERVER File server system QSYSWRK Used for general system work QUSRWRK This is the default subsystem used for TCP IP Client Access Host Servers that used to run in QSYSWRK A new subsystem can also be defined with the Create Subsystem Description CRTSBSD command Chapter 3 Optimizing communications performance 15 For more information about creating subsystems see the Work Managemeni book 16 Version 5 Chapter 4 Communications applications Communications applications that are used in an APPC advanced program to program environment are also available to be used in an APPN and HPR environment only the method by which data is transported is changed APPC delivers the data from ap rears higher in the SNA layers down to APPN for transportation through the network When you encounter problems that indicate that the route to the remote location cannot be found you can attempt to mare the connection again with ne Start Pass Through STRPASTHR command See the For information on Connecting Windows 95 NT Clients to your AS 400 see Klient Accesd User written APPC applications APPN performs many functions in a communications environment Therefore it is important to consider time out parameters in APPC programs which use ICF In particular it may be important to increase the WAITFILE parameter for the
13. COS parameter must be defined in the host logon mode table using the COS parameter on the MODEENT macro instruction The class of service description must also be defined in the VTAM class of service table For more information on AS 400 parameters see Examples Connecting AS 400 to a host system Configuration parameters must be coordinated when you connect an AS 400 system to a host system Example 1 AS 400 to host system over a nonswitched SDLC line This diagram shows the AS 400 values that need to match the VTAM values when you use a nonswitched SDLC line 26 Version 5 AS 400 System Network Attributes LCLLCONAME R4OSZAL4 LCLNETID RPC Line Description LIND HOSTLINE CHN HONSWTPP EXCHID WSYSGEN LINESPEED 9600 MAXFRAME 521 NRZI YES Host Controller Description CTLD HOSTCTL LINKTYPE SDLC LINE HOSTLINE MAXFRAME LINKTYPE STNADDR C1 Display Device Description DEYD R4OS2AQ DEVCLS RMT LOCADR 09 CTL HOSTCTL APPTYPE CTLSSN LCLLOCNAME NETATR Display Device Description DEYD D5PO2 DEWCLS RMT LOCADR 00 CTL HOSTCTL APPTYPE DEVINIT INACTTMR WATTACH Printer Device Description DEYD APO2 DEVCLS RMT TYPE 3287 MODEL 0 LOCADR 00 CTL HOSTCTL APPTYPE APPTINIT INACTTMR WSEC15 FMTLOCHAME 30324407 LCLLOCHAME NETATR R4082A09 LU RAOS2A14 LU VTAM Licensed Program LINE Line definition SPEED 9600 MAXDATA 521 PU ADDR C1 Station address NETID
14. Press Enter The device description is created For more information about ICF see 18 version 5 Performance considerations for Common Programming Interface Communications You can use Common Programming Interface Communications CPI Communications to write application programs that you want to communicate with advanced program to communications APPC The interface makes use of the System Network Architecture SNA LU logical unit 6 2 architecture to do the following e Establish a conversation e Send and receive data e Exchange control information e End a conversation e Notify a partner program of errors Intersystem communications feature ICF and CPI Communications programs have similar performances for small data transfers To optimize CPI Communications application programs do the following e Minimize the use of flush and confirm e Receive a compile record and parse it in your buffer e Do not use multiple receive calls to receive a single record e Use Request to Send only when necessary To add or change communications entries to get the system set up for CPI Communications do the following 1 Type appropriate command on the AS 400 command line and press F4 e Add Communications Entry ADDCMNE e Remove Communications Entry RMVCMNE e Change Communications Entry CHGCMNE 2 Use the online help information to change add or remove parameter values 3 Press Enter The communications entries are added cha
15. Responsible or assigning DLC and is conigured for he PYCO connecton between the AS 400 system and he 5494 RVET216 0 Matching AS 400 parameters for a 5494 connected by SDLC You must coordinate communications configuration parameters between AS 400 and the 5494 controller that is connected by EDLA These parameters are described in the following table Then the related fields and subfields from the 5494 configuration display are listed next These values are followed by the AS 400 configuration value and the matching 5494 value to be entered in the display subfield You can coordinate these values automatically or manually Pick one of these ways To automatically connect the AS 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system value To manually connect the AS 400 to a 5494 controller 2 g AS 400 to a 5494 controller conne example of connecting AS 400 to a 5494 controller by SDLC Use the following table to configure the AS 400 connected by SDLC 48 Version 5 For more information about configuring the 5494 see these books IBM 5494 Remote Control Unit Planning Guide GA27 3936 IBM 5494 Remote Control Unit User s Guide GA27 3852 AS 400 AS 400 mee Prompt Parameter Field Subfield AS 400 Value 5494 Value Notes Connection CNN 3 1 NONSWTPP 0 type MP SWTPP 1 3 MP 0 NONSWTPP 1 SWTPP Duplex Duplex 3 2 HALF 0 FULL 1 NRZ
16. not significant enough to choose one over the other e The 100 Mbps Ethernet support provides the best LAN performance The IOP can be optimally configured to have an aggregate transfer rate of 27 Mbps Multiple concurrent large transfers may be required to drive at that rate e When analyzing communications performance that includes the 2619 TRLAN IOP you should be aware that resources other than the IOP use can become the bottleneck e You should have the highest capacity IOP available for file serving You should have the highest capacity IOP available for environments that use many communications input and output operations for each transaction The highest capacity IOP also minimizes the overall response time See the following references for more detail e For more information about AS 400 communications see the e For more information on IOP performance see the Performance Tools for AS 400 book Improving data path performance To assess the performance of your data path you may want to review the following topics 10 Version 5 Considerations for subsystem configuration for error recovery performance Each piece of work that runs on the AS 400 system is called a job Each job is a single identifiable sequence of processing actions that represents a single use of the system The basic types of jobs performed are interactive jobs batch jobs spooling jobs autostart jobs and prestart jobs Jobs that run in subsystems
17. Control Unit must match Remote RMTNETID 11 3 Values specified for the AS 400 network CRTCTLAPPC and CRTCTLRWS identifier commands and for the 5494 Remote Control Unit must match This will probably match LCLNETID in the network attributes and H1 2 Remote RMTLOCNAME 12 Values specified for the AS 400 location CRTCTLRWS command and for the name 5494 Remote Control Unit must match Example Connecting AS 400 to a 5494 controller connected by Ethernet Configuration parameters must be coordinated when you connect an AS 400 system to a 5494 controller Example AS 400 to 5494 controller that is connected by Ethernet The following diagram shows the AS 400 parameters and 5494 parameters that need to match when you use Ethernet Chapter 7 Communicating with remote workstation controllers 45 Network Attributes NWS Config Screen 2 LGLLOGNAME SYSNAME H1 3 NETID LGLNETID NETID 12 ENS494GP 13 ENS494GP H1 4 ORMTWSG 15 02006 49 4E0000 H1 1 SYSNAME H1 2 NETID H1 5 400000004 400 H1 7 O4 Line Description GRTLINETH LIND ENLINOS NWS Config Screen 1 ADPTADR 400000004 400 AA 5 AUTOGRTCTL YES F 04 Auto created APPC Controler Description GTLD ENS494 LINKTYPE LAN LINE ENLINOS RMTNETIO NETATR RMTGPNAME EN5494CGP ADPTADR 02006 494E000 DSAP Od SSAP Od RWS Controller Description GTLD ENS494RAWS TYPE 5494 MODEL 2 LINKTYPE NONE RMTLOGNAME ENS4I4GP LGLLOGNAME NETATR RMT
18. Controller Unit must match LAN ADPTADR 15 Values specified for the AS 400 remote CRTCTLAPPC command and adapter for the 5494 Remote Control address Unit must match Local LCLLOCNAME H1 1 Values specified for the AS 400 location CRTCTLRWS command and name for the 5494 Remote Control Unit must match This will probably match LCLLOCNAME in the network attributes This value will probably match the LCLLOCNAME in the network attributes Link type LINKTYPE AA LAN 4 5494 configuration values must match the values specified for the LINKTYPE parameter on the CRTCTLAPPC command For APPC controllers that specify LINKTYPE SDLC the value specified in the 5494 configuration must be compatible with the physical interface INTERFACE parameter specified on the CRTLINSDLC command Select 4 for the network connections Remote RMTCPNAME 13 Values specified for the AS 400 control CRTCTLAPPC command and point name for the 5494 Remote Control Unit must match Remote RMTNETID 11 3 Values specified for the AS 400 network CRTCTLAPPC and identifier CRTCTLRWS commands and for the 5494 Remote Control Unit must match This will probably match LCLNETID in the network attributes and H1 2 Remote RMTLOCNAME 12 Values specified for the AS 400 location CRTCTLRWS command and name for the 5494 Remote Control Unit must match Example Connecting an AS 400 to a 5494 controller connected by frame relay Config
19. FBSS and for the SSAP parameter on the CRTCTLFNC command must match SSCP identifier SSCPID SSCP Names SSCP namexx If used the value specified for the FBSS controller must match the last 10 digits of the SSCPID parameter on the CRTCTLFNC command Station address STNADR SDLC Station address Communications Values specified for the AS 400 CRTCTLFNC command and the FBSS controller must match 66 Version 5 Example Connecting AS 400 to a finance network Configuration parameters must be coordinated when you connect an AS 400 system to a 4701 finance controller Finance communications use high level language operations and communications functions that allow you to communicate between an AS 400 system and finance controllers 8209 Ethernet F Token T AS 400 System FBSS Ring LAN User Applications 4722 4707 3694 S DLG SDLG Finance Communications x 25 3694 4702 SDLG 4732 4720 4732 4704 4704 4704 4704 3279 3624 4704 4704 4710 3278 IGF only RV2PSTS 0 Matching AS 400 parameters for retail controllers You must coordinate several AS 400 parameter values with retail controllers for retail communications These values are specified for the AS 400 system and in the controller configuration For more information about configuring the 3651 controller see the IBM Programmable Store System Language and Host Services Macro Reference GC30 3076 book Chapter 7 Communicating with remote workstation c
20. K 400054946000 5494 token ring address STNADDR 01 Twinaxial independent work station using DOS Client Access 400 Automatically created Remote Work Station Controller Description CTLD NYS49RMT TYPE 5494 LINKTYPE NONE RMTLOCNAME NY 5494 CONFIG PCS SFLR 1 1 545P RTLN MYNET DOSTRN1 RTYP 5250 LCLLOCNAME NETATR EMLI S45P 2 FMTNETID NETATR Token ring independent work station using DOS Client Access 400 CONFIG PCS SFLR 1 1 RCHAS218 RTLN MYNET DOSTRN1 RTYP ITRN TALI S45P 40005495E000 Automatically created DWS Display Device Description DEVD NYS4DSPOO CTL NYSA9RMT LOCADR 00 NYS4DSPOO Automatically created Port 0 DWS Printer Device Description Address 0 DEYD NY5S4PRT14 CTL NYSA9RMT LOCADR 14 NYS4PRT14 Port 2 Address 6 RV4T212 0 Chapter 7 Communicating with remote workstation controllers 51 Matching AS 400 parameters for a 5494 connected by X 21 You must coordinate communications configuration parameters between AS 400 and the 5494 remote controller that is connected by K 21 These parameters are described in the following table Then the related fields and subfields from the 5494 configuration display are listed next These values are followed by the AS 400 configuration value and the matching 5494 value to be entered in the display subfield You can coordinate these values automatically or manually Pick one of these ways e To automatically connect the AS
21. RPC AS 400 local network identifier Dependent LU name LOCADDR 09 Dependent LU address Independent LU name LOCADDR 00 Independent LU address RV4T203 0 Example 2 AS 400 to host system over a token ring line This diagram shows the AS 400 values that need to match the VTAM values when you use a token ring line Chapter 5 Communicating with host systems 27 AS 400 System VTAM Licensed Program Network Attributes LCLLOCNAME RCHAS 22 LCLNETID RPC Line Description Switched Major Node Definition LIND TRNLINE SwW722 VBUILD Switched major node name ADPTADR 4000705F4512 LINESPEED 4M MAXFRAME 1994 Host Controller Description SW722 PU CTLD TRNCTL1 IDBLK 056 AS 400 black number LINKTYPE LAN IDNLM 0722A AS 400 ID number LINE TRNLINE MAXDATA 1994 AS 400 maxdata MAXFRAME LINKTYPE RMTNETID USIEMZP FMTEPNAME ANYVALL LCLEXCHID O560722A DSAP 04 SSAP 04 APPN YES NODETYPE LENNODE PATH2 PATH DIALNO 010440007 05445 12 Display Device Description DEYD TRN722A LOCADR 04 CTL TRNCTL1 APPTYPE CTLSSN LCLLOCNAME NETATR SW722A04 LU Display Device Description DEYD TRN 22A000 LOCADR 00 CTL TRNCTL1 APPTYPE DEVINIT Host Controller Description SWF22B PU NETID RPC AS 400 local network ID LOCADDR 04 Dependent LU address RCHAS 22 LU Independent LU name LOCADDR 00 Independent LU address CTLD TRNCTL2 IDBLK 056 AS 400 block number LINKTYPE LAN IDNUM 0
22. To manually connect the a to a 5494 controller example of connecting AS A00 to a 5494 controller by X 25 Use the following table to connect an AS 400 to a 5494 controller that is connected by X 25 For more information about configuring the 5494 see these books IBM 5494 Remote Control Unit Planning Guide GA27 3936 54 Version 5 IBM 5494 Remote Control Unit User s Guide GA27 3852 AS 400 AS 400 3494 AS 400 Prompt Parameter Field Subfield Value 5494 Value Notes Default DFTPKTSIZE 5 1 64 0 packet size 128 1 256 2 512 3 Local LCLLOCNAME H1 1 Values specified for the AS 400 location CRTCTLRWS command and for the name 5494 Remote Control Unit must match This will probably match LCLLOCNAME in the network attributes This value will probably match the LCLLOCNAME in the network attributes X 25 link LINKPCL 6 2 QLLC 01 protocol ELLC 10 Link type LINKTYPE AA X25 1 5494 configuration values must match the values specified for the LINKTYPE parameter on the CRTCTLAPPC command For APPC controllers that specify LINKTYPE SDLC the value specified in the 5494 configuration must be compatible with the physical interface INTERFACE parameter specified on the CRTLINSDLC command Select 1 for communications using X 25 lines X 25 NETLVL 6 5 1988 0 Used for X 25 communications only network 1984 1 level 1980 2 Remote RMTCPNAME 13 Values specified f
23. Value and Value Notes 2 and 3 00 SWITCHED YES Bit 2 Specify 1 if using nonswitched CNN SWTPP communications or 0 if using switched 01 Not valid communications If switched the SENDID parameter must also be specified 10 SWITCHED NO and CNN NONSWTPP Bit 3 Specify 1 if using a multipoint communications 11 SWITCHED NO and Laren 0 if not 01 is not a valid combination for CNN MP i 4 0 None See Notes Direct attachment This bit must be set to 0 for communications with the AS 400 system There is no 1 None equivalent parameter for the AS 400 system 5 0 MODEMRATE FULL Modem data rate 1 MODEMRATE HALF 6 0 DUPLEX HALF Data carrier setting 1 DUPLEX FULL 7 0 None Answer tone generation There is no equivalent parameter for the AS 400 system Specify 0 to indicate that the modem generates the answer tone 1 None or 1 to indicate that the controller generates the answer tone For information about SDLC see Matching AS 400 parameters for 3684 retail controllers You must coordinate parameters with the AS 400 system and the 3684 retail controller The following table lists those parameters AS 400 parameters are listed in alphabetical order the commands on which the parameters are specified are included in the rightmost column of the table To configure the AS 400 to a 3684 controller use the following table 3684 AS 400 AS 400 Definition Prompt Parameter Statement 3684 Paramete
24. area networks perform these tasks e Reduce the total number of frames by using larger frames e To take advantage of these large frame sizes change the MAXFRAME parameter on the line description LIND to reflect the maximum value For X 25 increase the DFTPKTSIZE and MAXFRAME parameters to their maximum value e Configure a WAN line as full duplex to provide you with a higher throughput for applications that can take advantage of this mode This can also provide higher throughput for multiple users e Increase frame relay to capacity The data rate for a given protocol may increase as frame size increases Under these circumstances the central processing unit CPU and the input output processor IOP do not do as much processing Fewer and larger frames also make more efficient use of the communications line higher effective data rate because of fewer overhead bytes and line turn arounds Frame relay has equivalent performance over RS449 X 21 and V 35 assuming equal line speeds and conditions Frame relay performance CPU time is similar to or slightly better than Synchronous Data Link Control For properly tuned large transfer applications the CPU and IOP have no problem using the line speed to capacity For information about configuring AS 400 communications see the book Adjusting the WAN line speed for optimum AS 400 performance In many cases the communications line is the largest contributor to overall response time in t
25. characters and control character sequences to send binary coded data over a communications line Binary synchronous communications equivalence link BSCEL support is the intersystem communications function ICF support on the AS 400 system that provides binary synchronous communications with a remote system or device BSCEL also supplies online and batch communications between application programs on different BSC systems AS 400 application programs can be written in the Integrated Language Environment ILE C 400 ILE COBOL 400 ILE FORTRAN 400 or ILE RPG 400 programming languages Frame relay networks Frame relay is a protocol that defines how frames are routed through a fast packet network based on the address field in the frame Frame relay takes advantage of the reliability of data communications networks to minimize the error checking done by the network nodes This provides a packet switching protocol similar to but much faster than X 25 The high speed that can be obtained through frame relay networks makes it well suited for wide area network WAN connectivity Frame relay is commonly used to connect two or more LAN bridges over large distances The AS 400 system supports these frame relay network connections Chapter 10 Common networking standards 93 e Frame relay direct network Allows data that uses SNA TCP IP or IPX communications over a frame relay network to move at speeds of up to 2 048 Mbps This support allows a net
26. header lengths MAXFRAME should be 9 bytes longer than the 4700 MWL parameter MWL Value specified for the 4700 MWL parameter must be coordinated with the value specified for the AS 400 MAXFRAME parameter on the CRTCTLFNC command Because the MAXFRAME parameter includes transmission and request header lengths MAXFRAME should be 9 bytes longer than the 4700 MWL parameter If the AS 400 maximum length of request unit MAXLENRU parameter specified for device descriptions attached to the 4700 controller is larger than the MAXFRAME parameter specified for the controller description the 4700 should also specify OPTIONS SEGMENT NRZI data NRZI COMLINK ACB encoding For SDLC finance communications if the line does not use NRZI data encoding NRZI NO on the CRTLINSDLC command include the DCE value on the ACB parameter ACB DCE Station address STNADR X25CKT CUA The values specified for the AS 400 STNADR parameter on the CRTCTLFNC command must match the physical address CUA parameter specified for the 4700 Matching AS 400 parameters for FBSS finance controllers You must coordinate several parameter values that are specified for the AS 400 system and IBM Financial Branch System Services FBSS finance controllers in the controller configuration The following table shows those AS 400 configuration parameters that must match values on the SDLC Token Ring or X 25DLC configuration displays for FBSS c
27. is specified as a 2 digit hexadecimal number SSCP identifier SSCPID VTAMLST SSCPID Required if APPN YES or if RMTCPNAME is not specified AS 400 controller description value must match SSCPID specified in the VTAM start options list ATCSTRyy The SSCPID parameter is a decimal value 0 65535 the AS 400 value is specified as a 12 digit hexadecimal number of which the first 2 digits are 05 Station address STNADR PU ADDR AS 400 system station address must be unique within host PU definitions Controller description STNADR must match the value specified in the line description For more information on AS 400 parameters see Matching AS 400 device description parameters for a host system You must match host system communications configuration parameters with AS 400 values A description of the AS 400 values are in the following table For information about configuring host systems see the manuals VTAM Installation and Resource Definition SC23 0111 and Network Control Program Resource Definition Reference SC30 3254 You can specify some host system parameters on multiple definition statements such as the GROUP LINE PU and LU The following table lists only the lowest level definition statement that is used by the host system To configure an AS 400 to a host system x el for an example of connecting an AS 400 to a host system 24 Version 5 e Use the following table for the device desc
28. lines controllers or devices may represent the symptom of the problem To check and change the communication configuration on the system do the following Type the Work with Configuration Status WRKCFGSTS command on any AS 400 command line Press F4 The Work with Configuration Status display appears Specify the configuration type for the CFGTYPE parameter Specify the configuration description for the CFGD parameter Pons Note You may subset this list produced by WRKCFGSTS based on the status of the objects using the STATUS parameter For example if you want to see just the failed objects specify STATUS FAILED Considerations for system tuning during error recovery The overall performance tuning that is done by the system can play a significant role during error recovery scenarios For example you may need to change the machine pool if it is too small because it can cause excessive error recovery times e Performance Adjustment QPFRADJ The automatic performance adjustment function of the system is set to 2 when the system is shipped The system can automatically adjust the performance of the system based on this value Automatic adjustment may be a desirable feature particularly when unexpected loads hit the system Automatic adjustment can help the system perform better through these peak loads e Subsystem considerations You should consider dividing communications users whether they are remote workstation or APPC
29. network name Line Description H1 4 OQRMTWSG AS40000 mode name GRTLINSDLG H1 5 111111 AS400 Connection LIND X21SHMLN number CNN SHI NRZI NO NWS Config Screen 1 AS 400 Connection AA 2 X21 Switched 2 G1 5495 Station address D 4 Daal ditt format SHMCALLFM DNIG GALLNBR 411111 APPC Controler Description GTLD X21SHM SWITCHED YES SHM YES GNNNBR 222222 RMTNETID NETATR RMTCPNAME STNADR i EXGHID PWS using DOS PC Support 400 GONFIG PGS SFLR 1 1 SYSNAME RTLN NETID PS2 ATYP 5250 EMLI SYSNAME 1 CTLD K21SHMAWS TYPE 5494 LINKTYPE NONE RMTLOGNAME X21CP LGLLOGNAME NETATR RMTNETID NETATR NWS Display Devices Description D EVD DISP3196 DISP3196 CTL X215HMRWS i Port 1 LOCADA OB Address 4 RV4T21S 0 Matching AS 400 parameters for a 5494 connected by X 25 You must coordinate communications configuration parameters between the AS 400 and the 5494 controller that is connected by These parameters are described in the following table Then the related fields and subfields from the 5494 configuration display are listed next These values are followed by the AS 400 configuration value and the matching 5494 value to be entered in the display subfield You can coordinate these values automatically or manually Pick one of these ways To automatically connect the AS 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system value e
30. the controller description CTLD Maximizing the frame size in a LAN environment supplies the best performance for large transfers A large frame size does not negatively affect performance for small transfers Configure both the AS 400 system and the other link station for large frames Otherwise of the two maximum frame size values the smaller is used when you transfer data Bridges may also limit the maximum frame size You should change the default value from 1994 to a larger size e LANMAXOUT on the CTLD for advanced program to program communications APPC environments This parameter governs how often the sending system waits for an acknowledgment The LANACKFRQ Chapter 3 Optimizing communications performance 9 parameter value on one system should never have a greater value than the LANMAXOUT parameter value on the other system The parameter values of the sending system should match the values on the receiving system e Setting appropriate values for the LANMAXOUT parameter along with the LAN acknowledgment frequency LANACKFRQ parameter for both the sending stations and receiving stations is essential for optimal performance Other values may decrease throughput by 50 or even more if conditions trigger time outs e LANWDWSTP for advanced program to program communications APPC on the controller description CTLD If there are network congestion or overruns to certain target system adapters then increasing the value from the defaul
31. 00 LU name H1 2 DALNET AS 400 network name H1 5 400000000000 Token ring address of AS 400 DWS Configuration Screen 1 AS 400 connection AA 4 Token ring Line Description CRTLINSDLC LIND DALTRAN ADPTADR 400000000000 AUTOCRTCTL YES Automatically created APPC Controller Description LINKTYPE WLAN LINE DALTRAN FMTNETID HETATR RMT CPRAME DAL5 494 ADPTADR 400054946000 Automatically created Remote Work Station Controller Description CTLD DALSARMT TYPE 5494 LINKTYPE HONE FMTLOCNAME DAL5494 LCLLOCNAME NETATR FMTNETID HETATR Automatically created DWS Display Device Description DEYD DALSDSPOO CTL DALSARMT LOCADR 00 DAL5DSP Q Automatically created Port 0 DWS Printer Device Description Address 0 DEYD DALSPRT14 Twinaxial independent work station using DOS Client Access 400 CONFIG PCS SFLR 1 1 RCHAS218 RTLH DALNET DOSTWK1 RTYP 5250 EMIL RCHAS218 2 CTL DALSARMT LOCADR 14 DALSPRT14 Port 2 Address 6 RV 4T213 0 Matching AS 400 parameters for a 5494 connected by Ethernet You must coordinate communications configuration parameters between AS 400 and the 5494 controller that is connected by Ethernel A description of these parameters are in the following table Then the related fields and subfields from the 5494 configuration display and the AS 400 configuration value and the matching 5494 value entered in the display subfi
32. 25 command and in sequence number 410 must match Modem data MODEMRATE 318 Full or Half Speed Transmission rate select The values specified for the MODEMRATE parameter on the CRTLINSDLC and CRTLINX25 commands must match sequence number 318 as follows If MODEMRATE FULL 318 0 If MODEMRATE HALF 318 1 NRZI data NRZI 313 NRZ or NRZI Encoding encoding For SDLC lines only the values specified must match as follows If NRZI NO 313 0 If NRZI YES 313 1 Short hold SHM 362 X 21 Switched Options mode If SHM YES is specified on the CRTCTLRWS command digit 7 or 8 of question 362 must be set to 1 For example xxxxxx10 indicates that the DCE is supported for direct calls Station address STNADR 302 Control Unit Address Value specified for item 302 must match that specified on the CRTCTLRWS command Example Connecting an AS 400 to a 3174 control unit Configuration parameters must be coordinated when you connect an AS 400 system to a 3174 controller Chapter 7 Communicating with remote workstation controllers 61 The following diagram shows the AS 400 parameters and 3174 parameters that need to match when you use token ring ASADO System 3174 Control Unit Line Description 101 7 Token Ring Network CRILINTRH 106 4000 3174 0004 Token ADFTADR 40007 1ODES OO Ring Network Address of the 3174 107 40007 10DES00 Token Ring Network Address of the Gateway Controller Description
33. 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system value e To manually connect the AS 400 to a 5494 controller A nd A n example of connecting AS 400 to a 5494 controller by X 21 Use the following table to configure the AS 400 to a 5494 controller by X 21 For more information about configuring the 5494 see these books IBM 5494 Remote Control Unit Planning Guide GA27 3936 IBM 5494 Remote Control Unit User s Guide GA27 3852 AS 400 AS 400 3434 Prompt Parameter Field Subfield AS 400 Value 5494 Value Notes Connection CNNNBR 15 number Values specified for the AS 400 CRTCTLAPPC command and for the 5494 Remote Control Unit must match If the AS 400 CRTCTLAPPC command specifies CNNNBR DC the X 21 direct call user facility must be used to make the connection Local LCLLOCNAME H1 1 Values specified for the AS 400 location CRTCTLRWS command and name for the 5494 Remote Control Unit must match This will probably match LCLLOCNAME in the network attributes This value will probably match the LCLLOCNAME in the network attributes Remote RMTCPNAME 13 Values specified for the AS 400 control CRTCTLAPPC command and point name for the 5494 Remote Control Unit must match Remote RMTNETID 11 3 Values specified for the AS 400 network CRTCTLAPPC and identifier CRTCTLRWS commands and for the 5494 Remote Control Unit must match This
34. 50 display station pass through or Telnet are some examples of these types of connections that should be separated When you configure interactive subsystems identify how you want the interactive users to be separated and create the appropriate subsystem descriptions During error recovery when many users risk losing their sessions at one time an interactive subsystem can be very busy performing device recovery This device recovery can adversely affect the work of other users in the subsystem who would otherwise be unaffected by the failure Therefore you may need to change how the interactive subsystems are configured However multiple subsystems can provide multiple processes to do cleanup and recovery when error conditions occur This can result in improved performance The example below shows how to configure an interactive subsystem to allocate devices that begin with devname and present a signon display on those display devices ADDWSE SBSD libname sbsname WRKSTNDEV devname AT SIGNON Use the following example to configure an interactive subsystem so that the device name devname is not allocated and a signon display does not appear ADDWSE SBSD libname sbsname WRKSTNDEV devnamex AT ENTER Adding workstation entries with AT ENTER allows you to use the Transfer Job TFRJOB function into that subsystem If the TFRJOB function is not required or necessary there is no need to add the workstation entries with AT ENTER To s
35. 684 retail controller use the following table AS 400 Parameter and LINECON Bit Bit Value Value Notes 0 0 None Enabled at initial microprogram load IML There is no equivalent parameter for the AS 400 system Specify 0 1 None to indicate that the controller is enabled at IML or 1 to indicate that the controller is not enabled at IML 1 0 NRZI NO Specifies NRZI data encoding with leading pads 1 or NRZI YES non NRZI without leading pads 0 2 and 3 00 SWITCHED YES and Bit 2 Specify 1 is using nonswitched communications CNN SWTPP or 0 if using switched communications If switched the 01 Not valid SENDID parameter must also be specified 10 SWITCHED NO and Bit 3 Specify 1 if using a multipoint communications CNN NONSWTPP protocol or 0 if not 01 is not a valid combination for 11 SWITCHED NO and nese pita CNN MP 4 0 SNBU NO Switched network backup 1 SNBU YES 5 0 MODEMRATE FULL Data rate select speed 1 MODEMRATE HALF 6 0 DUPLEX HALF Data carrier setting 1 DUPLEX FULL 7 0 None Answer tone generation There is no equivalent parameter for the AS 400 system Specify 0 to indicate 1 None that the controller generates the answer tone or 1 to indicate that the answer tone is omitted Matching AS 400 parameters for 4680 4690 LINE parameter You must coordinate parameters between the AS 400 and the 4680 or 4690 retail controller The following table lis
36. 722B AS 400 ID number LINE TRNLINE MAXDATA 1994 AS 400 maxdata MAXFRAME LINKTYPE FMTNETID NETATR FMTCPNAME ANYWAL2 LCLEXCHID 0560722B PATH2 PATH DSAP 04 DIAL NO 010840007 05445 12 SSAP 08 APPH YES NODETYPE LENNODE Display Device Description NETID RPC 45 400 local net ID DEVD TRH 22B SwW722B04 LU LOCADR 04 LOCADDR 04 Dependent LU address CTL TRNCTL2 APPTYPE CTLSSN LCLLOCNAME S W722B00 SW722B00 LU Independent LU name LOCADDR 00 Independent LU address Display Device Description DEYD TRH722B000 LOCADR 00 CTL TRNCTL APPTYPE DEVINIT Example 3 AS 400 system for DLUR support with the host system 28 Version 5 RY 4T204 0 This diagram shows the AS 400 values that need to match the VTAM values when you use AS 400 DLUR and VTAM AS 400 System YTAM Licensed Program YTAM Start Up Parameters CPCP YES NODETYPE NN ALSO NETWORK NODE x NETID USIBMZP NETWORK ID X XNETALS YE NON NATIVE NETWORK SUPPORT X SSCPNAME R5CDRM SSCPNAME X Network Attributes Cross Domain Resource Definition LCLCPNAME ASDLUR2 CDRDDLUR VBUILD TYPE CDRSC LCLNETID APPH NETWORK NETID APPN ASDLUR CDRSC Line Description LIND TRNLINE ADPTADR 400000000365 Switched Major Node Definition MAXFRAME 1994 SWDLUR2 YBUILD Switched major node name Host Controller Description SWDLUR2A PU CTLD all IDBLK 056 AS 400 block number LINKTYPE IDNUM 13014 AS 400 ID number LINE va
37. CCPIC on the command line and pressing F4 Prompt Type TRCCPIC on the command line and press F4 Specify OFF for the Trace option setting and you are prompted for the OUTPUT parameter Solving communication problems using the system problem log Error conditions that are communications related can make entries in the system problem log You can access the log to see the lists of problems that are detected by the system or by the user To access the system problem log type WRKPRB on any AS 400 command line and press F4 Tips You can select a subset of the problems that are listed in the problem log by selecting the problem status A problem that is listed in the log has one of the following as a status e OPENED The problem was identified problem analysis has not been run e READY The system has run problem analysis the problem is ready to be prepared e PREPARED The system added information that relates to the problem e SENT The problem was sent to the service support location Chapter 8 Troubleshooting communications problems 83 You can also sort the WRKPRB display by the date the problem was entered into the log Note Use the WRKPRB command for the menu options additional problem analysis or documenting problem records Solving communication problems using status information You can often diagnose the communications problem by checking communications status Status information for network servers network interfaces
38. I data NRZI 3 4 YES 0 encoding NO 1 Local LCLLOCNAME H1 1 Values specified for the AS 400 location CRTCTLRWS command and name for the 5494 Remote Control Unit must match This will probably match LCLLOCNAME in the network attributes This value will probably match the LCLLOCNAME in the network attributes Link type LINKTYPE AA SDLC 0 2 3 5494 configuration values must match the values specified for the LINKTYPE parameter on the CRTCTLAPPC command For APPC controllers that specify LINKTYPE SDLC the value specified in the 5494 configuration must be compatible with the physical interface INTERFACE parameter specified on the CRTLINSDLC command Select 0 for communications using SDLC lines other than X 21 connections Remote RMTCPNAME 13 Values specified for the AS 400 control CRTCTLAPPC command and point name for the 5494 Remote Control Unit must match Remote RMTNETID 11 3 Values specified for the AS 400 network CRTCTLAPPC and identifier CRTCTLRWS commands and for the 5494 Remote Control Unit must match This will probably match LCLNETID in the network attributes and H1 2 Chapter 7 Communicating with remote workstation controllers 49 5494 AS 400 AS 400 Prompt Parameter Field Subfield AS 400 Value 5494 Value Notes Remote RMTLOCNAME 12 Values specified for the AS 400 location CRTCTLRWS command and name for the 5494 Remote Control Unit m
39. IAL If the AS 400 line description CNN parameter is SWTPP or SHM DIAL YES must be specified for the host system if CNN is MP or NONSWTPP DIAL NO must be specified If CNN MP is specified the SERVICE macroinstruction must be used to specify the sequence in which stations are served Exchange identifier EXCHID PU IDBLK IDNUM The AS 400 block number digits 1 3 of the EXCHID is always 056 The remaining 5 digits based on the system serial number if SYSGEN is used are specified in the IDNUM parameter Line speed LINESPEED LINE SPEED Line speeds specified for each system must match Maximum frame size MAXFRAME PU MAXDATA Values specified for each system must match NRZI data encoding NRZI LINE Station address STNADR PU NRZI Values specified for each system must match ADDR AS 400 system station address must be unique within host PU definitions Ignored within 9370 LAN environment For more information on AS 400 parameters see For steps on how to create a line description see 22 Version 5 Matching AS 400 controller description parameters for a host system You must match host system communications configuration parameters with AS 400 values A description of the AS 400 values are in the following table For information about configuring host systems see the manuals VTAM Installation and Resource Definition SC23 0111 and Network Control Program Re
40. IB MYLIB NEWOBJ MYCMN 2 Set up the communication entries ADDCMNE SBSD MYLIB MYCMN DEV PC ADDCMNE SBSD MYLIB MYCMN DEV PC MODE QSERVER MAXACT 0 ADDCMNE SBSD QSYS QCMN DEV PC MODE QPCSUPP MAXACT 0 3 If desired update your system startup program to start your new subsystems automatically Communications performance considerations for interactive jobs An interactive job is one that uses a keyboard and character type display If a job needs the user to type on the keyboard and display character results that job is probably considered interactive Interactive in this sense means that the job and the user depend on each other to get the work done To optimize communications performance for interactive jobs consider the following e Attach work stations through communications requires more CPU overhead than 5250 local workstations e Use a twinaxial controller to provide better performance than an American National Standard Code for Information Interchange ASCII controller e Keep the line utilization below 30 percent for best performance when interactive users are attached This will maintain predictable and consistent response times Exceeding 50 to 60 percent line utilization will usually cause unacceptable response times If your system has interactive users who are connected many different ways you should consider configuring your interactive subsystems to separate the users Local workstation remote workstations 52
41. LINSDLC command This parameter is used only for switched line communications RECVID 3651 RECVID parameter must match the last 5 digits of the EXCHID parameter specified on the AS 400 CRTCTLRTL command Modem data rate MODEMRATE QFHOST SDLCLIN Value specified for the AS 400 MODEMRATE parameter on the CRTLINSDLC command must match the value specified for bit 5 of the 3651 SDLCLIN parameter NRZI data encoding NRZI QFHOST SDLCLIN Value specified for the AS 400 NRZI parameter on the CRTLINSDLC command must match the value specified for bit 1 of the 3651 SDLCLIN parameter 68 version 5 AS 400 Prompt AS 400 Parameter 3651 Definition Statement 3651 Parameter SSCP identifier Station address SSCPID STNADR QFHOST QFHOST SSCPID 3651 SSCPID parameter must match the SSCPID parameter specified on the AS 400 CRTCTLRTL command SDLCPOL 3651 SDLCPOL parameter must match the STNADR parameter specified on the AS 400 CRTCTLRTL command Switched connection SWITCHED QFHOST SDLCLIN Value specified for the AS 400 SWITCHED parameter on the CRTCTLRTL command must match the values specified for bits 2 and 3 of the 3651 SDLCLIN parameter Note For the AS 400 system the 3651 QFHOST definition must specify DIRATT NO The value specified for the AS 400 parameters on the CRTLINSDLC command must match the values specified on the 3651 SDLCLIN parameter
42. N support HPR changes the existing APPN intermediate session routing by using automatic network routing ANR which maximizes the storage and processing requirement in intermediate nodes Each outbound packet has a predetermined path through the network so that intermediate routing nodes need not remember anything about HPR sessions that flow through them Intermediate routing nodes in HPR simply route data that is based on information that is contained within the packet itself The HPR function can operate under a base architecture or can operate under the base architecture plus options There are performance capabilities available under the Tower RTP option not available with the base The page HPR architecture option sais can give you a more thorough explanation of what architecture option is right for you HPR architecture option sets HPR base option Its primary function is to provide automatic network routing ANR Products that only use this function can participate as intermediate nodes in one or more rapid transport protocol RTP connections This type of implementation cannot be an end point of an RTP connection An addition to the base option is HPR Link Level Error Recovery A system that supports high speed links does not always require link level error recovery It is optional because when link level error recovery is eliminated there can be faster communications when using high quality data transmission RTP Tower Option Impl
43. NBR parameter on the controller description for the remote system NRZI data encoding NRZI NRZI Values specified for each system must match YES or NO Data link role ROLE ROLE The value specified for the local system line description ROLE parameter should match the controller description ROLE parameter specified at the remote system Number of stop bits STOPBITS STOPBITS Values specified for each system must match Switched connection type SWTCNN SWTCNN Values specified for each system must be compatible DIAL or ANS must not be specified for both systems 34 Version 5 AS 400 Remote AS 400 AS 400 Prompt Parameter Parameter Notes X 25 DCE support X25DCE X25DCE If X 25 DCE support is used X25DCE YES only one of the AS 400 line descriptions should specify YES The system specifying X25DCE YES should also specify CNNINIT LOCAL the other AS 400 system should specify X25DCE NO and CNNINIT REMOTE or CNNINIT WAIT For switched connections both systems can also specify X25DCE NEG to negotiate the DCE and DTE roles and CNNINIT CALLER to allow either system to initiate the connection by making the call For more information on AS 400 parameters see the I For steps on how to create a line description see Matching AS 400 controller description parameters for a remote AS 400 system You must coordinate communication
44. NETID NETATR NWS Display Devices Description DEVD DISP3196 DISP3196 CTL ENS 494RWS y Fort 1 LOGADR OB Address 4 ews PWS using DOS PG Support 400 GONFIG PGS SFLR 1 1 5YSNAME RTLN NETID PS2 RTYP 5250 EMLI SYSNAME 1 RV4T21 0 Matching AS 400 parameters for a 5494 connected by frame relay You must coordinate the communications configuration parameters between AS 400 and the 5494 controller connected by A description of the parameters are in the following table Then related fields and subfields from the 5494 configuration display and the AS 400 configuration value and the matching 5494 value You can coordinate these values automatically or manually Pick one of these ways e To automatically connect the AS 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system value To manually configure the AS 400 to a 5494 controller Use the following table to configure the AS 400 to a 5494 that is connected by frame relay For more information about configuring the 5494 see these books 46 Version 5 IBM 5494 Remote Control Unit Planning Guide GA27 3936 IBM 5494 Remote Control Unit User s Guide GA27 3852 AS 400 3494 AS 400 Prompt AS 400 Parameter Field Subfield Value 5494 Value Notes Local ADPTADR H1 5 Values specified in the AS 400 adapter line description CRTLINTRN address command and for the 5494 Remote
45. NRF you must change the link type to DLUR Follow these steps 1 Retrieve the configuration description for the Dependent LU Requester DLUR controller description using the Retrieve Configuration Source RTVCFGSRC command Edit the member to change the link type to DLUR Convert the source to a CL program Create the CL program using the CRTCLPGM command Delete the configuration using the DLTCTLD command Call the CL program to create the new configuration DARN An explanation of some of the fields on the Create Controller Description SNA Host CRTCTLHOST screen are as follows Local exchange identifier Matches the ID block and ID number parameters from the PU definition on VTAM Dependent PU name Matches the name of the PU specified on the PU definition on VTAM Note If the local exchange identifier and the dependent PU name are specified both must match the definitions on VTAM If both parameter values do not match the ACTPU will be rejected If the DIAL value is specified for the INLCNN parameter the primary DLUS name PRIDLUS and either the local exchange identifier LCLEXCHID or the dependent PU name DEPPUNAME must be specified Control point name and network identifier for the primary DLUS name Matches the SSCP name and NETID parameters on the VTAM startup options For the last step see Configuring the device descriptions Use the Create Device Description CRTDEVDSP command to create the device
46. PI Communications call interface Using CPI Communication calls carries the LU 6 2 verbs e The CICS file interface In CICS 400 support the LU 6 2 verbs are carried out by using EXEC CICS commands e The sockets application program interface API For the sockets API the LU 6 2 verbs are carried out by using the socket functions The APPC support also handles networking functions and allows peer systems in a network to start and end sessions without a controlling host system The AS 400 Advanced Peer to Peer Networking APPN support is an enhancement to the node type 2 1 architecture APPN provides additional networking functions such as searching distributed directories dynamically selecting routes routing of intermediate sessions creating and starting remote locations and routing data by using transmission priorities Built upon APPN high performance routing HPR is an enhancemnet to APPN that enables improved availability and persistence during network outages Dependent LU requester support Dependent LU Requester Support DLUR allows dependent secondary logical units LU 0 1 2 and 3 an entry point into the APPN network DLUR support gives the appearance of having an adjacent connection to VTAM but allows traversing the APPN network through intermediate nodes DLUR supports the following controllers displays and printers e Host devices including 3270 emulation EML remote job entry RJE and program to program
47. The Communications Trace function of the STRSST command ends the trace e The STOPTRC parameter is specified and the buffer becomes full ENDCMNTRC End Communications Trace The ENDCMNTRC command ends the trace currently running on the specified line network interface description or network server description The ENDCMNTRC command saves the communications trace buffer and the associated System Licensed Internal Code SLIC data PRTCMNTRC Print Communications Trace The PRTCMNTRC command writes the communications trace data for the specified line network interface description or network server description to a spooled file or a database file The system can print trace data multiple times in either form and parameters on the command allow for dividing and formatting of the data DLTCMNTRC Delete Communications Trace The DLTCMNTRC command deletes the communications trace buffer and associated SLIC data for the specified line network interface description or network server description The communications trace can be deleted once the trace has ended CHKCMNTRC Check Communications Trace The CHKCMNTRC command returns the communications trace status for a specific line network interface description or network server description The CHKCMNTRC command returns status for all of the traces of a specific type that exist on the system The system returns the status through a message Trace Common Programming Interface CPI Communications Y
48. U Name JA LU Address oO Partner LU APPN adxtest ADX_SPGM ADXTEST 286 Definition R4690CC Partner LU RCHASXXX Definition R4690CC ode Definition MODETRN Remotely Attachabe TP Name ADXTEST Rv4Taoi 1 Chapter 7 Communicating with remote workstation controllers 77 78 Version 5 Chapter 8 Troubleshooting communications problems If you suspect you have a problem with communications connectivity the AS 400 system provides a set of tools to help you with problem analysis tasks The list below contains some of the more common tools for communications problem analysis You can do the following to identify communication problems In addition when a local system rejects an incoming program start request a message is sent to the system operator message queue You can Use PEAT re to determine why the program start request was rejected Displaying message queues to solve communication problems Message queues receive some messages that are related to communications failures The message lists possible causes of the problem and additional information depending on the problem and the suggested problem analysis tool To display message queues follow these steps On the AS 400 command line type DSPMSG MSGQ XXXxX in which XXXX may be e The message queue identified by the QCFGMSGQ system value The default value is QSYSOPR Or message queue if the system value has been changed e For lines cont
49. VSFGLNK SSCPID 3684 SSCPID parameter must match the SSCPID parameter specified on the AS 400 CRTCTLRTL command Station address STNADR QVSFGLNK POLCHAR 3684 POLCHAR parameter must match the 2 digit hexadecimal address specified for the STNADR parameter on the AS 400 CRTCTLRTL command Allowed values are in the range 01 through FE Switched SWITCHED QFSFGLNK LINECON connection Value specified for the AS 400 SWITCHED parameter on the CRTCTLRTL command must match the values specified for bits 2 and 3 of the 3684 LINECON parameter Note For the AS 400 system the 3684 QVSFGLNK QVSFCOMM and QVSFSESN definitions must each specify DATALNK SDLC Values specified for the AS 400 parameters on the CRTCTLRTL and CRTLINSDLC commands must match the values specified on the 3684 LINECON parameter Specifying the LINECON parameter for 3684 retail controllers The following table describes how to coordinate values that are specified for parameters on the AS 400 CRTLINSDLC and CRTCTLRTL commands You must coordinate the values with bits that are specified for the 3684 LINECON parameter The LINECON parameter is specified as a series of 8 bits designated 0 through 7 01234567 The default value for the LINECON parameter when used with an SDLC line is 01000001 or hex 41 Chapter 7 Communicating with remote workstation controllers 71 The default value for each bit is underlined in the Bit Value column To configure the AS 400 to a 3
50. and Token Ring Network Address of the 3174 If the AS 400 system uses a Token Ring network line to connect to the 3174 controller values specified for question 106 and for the ADPTADR parameter on the CRTCTLRWS or CRTCTLAPPC command must match If the AS 400 system uses an Ethernet line through an 8209 LAN Bridge see Appendix C Local Area Network Addressing Considerations in the Communications Configuration book 58 Version 5 AS 400 Prompt AS 400 Parameter 3174 Configuration Questions Notes Local adapter address ADPTADR 107 Token Ring Network Address of the Gateway If the AS 400 system uses a Token Ring network line to connect to the 3174 controller values specified for question 107 and for the ADPTADR parameter on the CRTLINTRN command must match If the AS 400 system uses an Ethernet line through an 8209 LAN Bridge see Appendix C Local Area Network Addressing Considerations in the Communications Configuration book for information about specifying the ADPTADR parameter on the CRTLINETH command Connection number CNNNBR 423 Host DTE Address HNAD For X 25 lines the numbers specified on the CRTLINX25 command and in question 423 must match 368 X 21 Switched Short Hold Mode Dial Number For X 21 short hold mode connections the numbers specified on the CRTCTLRWS command and in question 368 must match 424 3174 DTE Address For X 25 SVC
51. blic and private packet switching networks and national telephone networks These topics introduce the types of wide area networks that are supported by the AS 400 system Asynchronous communications OS 400 asynchronous communications support allows an AS 400 application program to exchange data with a remote system or device using either an asynchronous start stop or X 25 line AS 400 application programs can be written in ILE COBOL 400 ILE RPG 400 ILE C 400 or FORTRAN 400 languages Asynchronous communications support includes file transfer support also used with other communications types and interactive terminal facility ITF Asynchronous communications support provides program to program and program to device communications between systems that use asynchronous start stop or X 25 lines For X 25 lines it also supplies an integrated packet assembler disassembler PAD 1 that follows CCITT recommendations X 3 X 28 and X 29 Asynchronous communications support allows you to send data to and receive data from a remote program or device attached by either an asynchronous start stop or an X 25 line Your application program must provide the data stream required by the remote device Asynchronous communications support packages your data stream in either a start stop format or within X 25 data packets Binary synchronous communications BSC is a data communications line protocol that uses a standard set of transmission control
52. cations support that allows programs on an AS 400 system to communicate with programs on other systems having compatible communications support such as System 38 and System 36 APPC on the AS 400 system provides an application programming interface to the Systems Network Architecture SNA LU type 6 2 and node type 2 1 architectures that makes it possible to communicate with System 390 The APPC support handles all of the SNA protocol requirements when your system is communicating with a remote system that uses the LU type 6 2 and node type 2 1 architectures You can connect your system to any other system that supports the APPC program interface APPC application programs can also communicate over lines using the Internet Protocol IP of Transmission Control Protocol Internet Protocol TCP IP The AS 400 APPC support handles the protocol needed for communicating between an application program that runs on your AS 400 system and an application that runs on a remote system The protocol consists of a set of verbs that are common to the local and remote systems in a network However the way in which each system provides a program interface to the verbs may differ The AS 400 system provides the following program interfaces e The intersystem communications function ICF file interface In ICF the LU 6 2 verbs are carried out by using data description specifications DDS keywords and system supplied formats e The Common Programming Interface C
53. clude File Transfer Protocol FTP Simple Mail Transfer Protocol SMTP Simple Network Management Protocol SNMP PING and user written sockets programs TCP IP over SNA TCP IP over IPX e AnyNet 400 APPC advanced program to program communications This support allows programs that are written to traditional APPC APIs such as ICF CPI Communications and CICS 400 to be run over non APPC networks The application program uses Location names to specify the source and destination address A TCP IP domain name server converts these location names to IP addresses Programs supported include distributed data management DDM Distributed Relational Database Architecture DRDA SNA distribution services SNADS display station pass through Client Access user written CPl Communications programs and user written ICF programs APPC over TCP IP APPC over IPX For more information about using both AnyNet and nonAnyNet sockets see the Sockets Programming book 3 Subsystems A subsystem is a single predefined operating environment through which the system coordinates work flow and resource usage OS 400 can contain several that are independent operating subsystems The run time characteristics of a subsystem are defined in an object that is called a subsystem description IBM supplies several subsystem descriptions that can be used with or without modification QINTER Used for interactive jobs QBATCH Used for batch jobs
54. communication users into multiple subsystems If communications fails all users who are in a single subsystem may be affected as a result of the communications recovery that is performed on their systems For more information see Using error messages to aid in error recovery When problems occur in communications there are many places you can look for error messages and additional information to help resolve the problems See the topics below for the most common places to look for APPC error information Solving communication problems using reason codes When the local system rejects an incoming program start request a message is sent to the system operator message queue You can use the message information to determine why the program start request was rejected 84 Version 5 Refer to Table 13 for an explanation on reason codes for failed program start requests Table 1 Reason Codes for Rejected Program Start Requests Reason Code 401 402 403 404 405 406 407 408 409 410 411 412 413 501 502 503 504 505 506 507 508 602 604 605 704 705 706 707 708 709 710 711 712 713 714 715 718 722 723 725 726 730 801 802 803 804 805 806 807 Reason Description Program start request received to a device that is not allocated to an active subsystem Requested device is currently being held by a Hold Communications Device HLDCMNDEV command User profile is not accessible Job description i
55. communications PGM e SNA Passthrough upstream devices e DHCF display devices e NRF display and printer devices e SNUF devices DSNX The normal SSCP PU and SSCP LU flows for dependent LUs are encapsulated in a control point server CP SVR pipe This pipe consists of two LU 6 2 sessions 88 Version 5 e Send e Receive At the primary end of the pipe is a Dependent LU Server DLUS At the secondary end of the pipe is a Dependent LU Requester DLUR DLUS and DLUR support the activation and deactivation of dependent physical units PUs and logical units LUs in the APPN network The pipe consists of a pair of LU 6 2 conversations where two APPC applications DLUR and DLUS exchange dependent SNA SSCP flows The flows are encapsulated in a general data stream GDS variable and sent in LU 6 2 logical records The pair of conversations that are used to transmit encapsulated SNA is called the CP SVR Pipe To configure DLUR see the page Configuring Dependent LU Requested High performance routing High Performance Routing HPR is the evolution of Advanced Peer to Peer Networking APPN HPR enhances APPN data routing performance and reliability especially when using higher speed lower error links To support high speed communications facilities certain changes to the APPN architecture are required These are necessary to allow switching in intermediate nodes to be done at a lower layer and to enable faster switching than in base APP
56. do all work that is performed on the AS 400 As the number of users on the system increases it becomes important for you to consider how the communications and interactive subsystems should be configured The configuration of subsystems has little impact in normal data path operations However multiple subsystems can provide multiple processes to do cleanup and recovery when error conditions occur This can result in improved performance As the number of users on the system increases you must consider the importance of how subsystems are configured e Consider limiting the number of devices that are serviced by a single subsystem Between 200 and 300 devices for each subsystem are recommended Use the following recommendations to divide these users The number of users in any given subsystem The connectivity used to access the system The type of work the users do The geographic location of the users e Create additional communications and interactive subsystems to split the work into multiple subsystems e The work that is performed in the QCMN subsystem is for connecting and disconnecting from the system Error recovery considerations are important in the configuration of the communications subsystem e To prevent a subsystem from ever allocating a device ensure that there are no workstation or type entries for the devices that you do what allocated by that subsystem e Only use the AT ENTER option if you must allow jobs to
57. e access point DSAP PORT SAPADDR For 9370 LAN only the AS 400 controller description DSAP must match the host SAPADDR parameter The SAPADDR parameter is a decimal value 4 252 the AS 400 value is specified as a 2 digit hexadecimal number Local exchange identifier LCLEXCHID PU IDBLK IDNUM For parallel connections only Required if the AS 400 system specifies RMTCPNAME ANY SWITCHED YES and LINKTYPE is SDLC or IDLC The LCLEXCHID specified must match the values specified in the switched major node definition PU macro instruction Chapter 5 Communicating with host systems 23 AS 400 Host Definition AS 400 Prompt Parameter Statement Host Parameter Maximum frame size MAXFRAME GROUP MAXDATA Values specified for each system must match Remote control point RMTCPNAME VTAMLST SSCPNAME name Required only if APPN YES AS 400 controller description value must match SSCPNAME specified in the Virtual Telecommunications Access Method VTAM start options list ATCSTRyy Remote network RMTNETID VTAMLST NETID identifier Required only if APPN YES AS 400 controller description value must match NETID specified in the VTAM start options list ATCSTRyy Source service access SSAP PU SAPADDR point For 9370 LAN only the AS 400 controller description DSAP must match the host SAPADDR parameter The SAPADDR parameter is a decimal value 4 252 the AS 400 value
58. e EXCHID parameter must be specified as xxxyyyyy where xxx matches the FBSS dentification block and yyyyy matches the FBSS Identification number Link type LINKTYPE Communication Data Link Control Servers Values specified for the FBSS and AS 400 configurations must match If the FBSS response is SDLC LINKTYPE SDLC must be specified for the CRTCTLFNC command e If the FBSS response is TRDLC LINKTYPE LAN must be specified for the CRTCTLFNC command e If the FBSS response is X25DLC LINKTYPE X25 must be specified for the CRTCTLFNC command Local location address LOCADR Session Id and LU Host Logical Unit Numbers Assignments FBSS logical unit number must match the LOCADR parameter value specified on the CRTDEVFNC command The FBSS logical unit assignments are decimal numbers the AS 400 values must be hexadecimal LU Assignments Host Logical Unit Numbers for Display Emulators FBSS logical unit number must match the LOCADR parameter value specified on the CRTDEVDSP or LU Assignments CRTDEVPRT command for 3270 devices attached to for 3287 Printer the FBSS controller Emulator The FBSS logical unit assignments are decimal numbers the AS 400 values must be hexadecimal NRZI data encoding NRZI SDLC N R Z l Communications Values specified for the AS 400 CRTLINSDLC command and the FBSS controller must match Source service access SSAP Token Ring Service access point for Host 37xx 4700 point Communications Values specified for the
59. e processing are essentially handled the same way Application program interface API performance considerations To achieve better performance with your AS 400 you need to consider the application programming interface API available on the AS 400 To optimize APPC performance consider the following Copyright IBM Corp 1998 2001 17 e Using larger sends for a given large transfer record sizes provides a higher application data rate and decreases CPU time With the larger record size the CPU has less processing to do because there are fewer application reads and writes to transfer the same amount of data e Ifa value of CALC is selected for maximum Systems Network Architecture SNA request response unit RU the system selects an efficient size compatible with the frame size The frame size is on the line description that you choose Changing the RU size to a value other than CALC may negate the performance feature e Compression with APPC should be used with caution and only for slower speed wide area network WAN environments Many suggest that compression should be used with speeds 19 2 kbps and slower e If you are doing tasks that include repetitive small puts better performance is achieved if you use ICF or CPI Communications See the following topics for a more complete discussion of APPC applications Performance considerations for intersystem communications function You can use intersystem communications functi
60. e the output of the trace information collected in the trace storage area User data length Specifies the maximum length of user data to be saved for each trace record in the storage area This prompt affects only the tracing of user data on the Send_Data and Receive calls This parameter does not affect the tracing of log data on Set_Log_Data Send_Error or Deallocate calls This prompt appears only if you specified ON on the Trace option setting prompt 128 The number of bytes for the user data length This is the default value 0 4096 The valid range of bytes for the user data length Trace Common Programming Interface CPI Communications continues to collect trace records until you stop the trace or until the trace storage area becomes full The amount of trace storage depends on the value that is specified on the Trace full prompt If the trace storage area becomes full and the collection of trace records stops you must enter the TRCCPIC command again to create output The output that is created by the TRCCPIC command is directed either to the spooled printer file QSYSPRT or to a database output file that you specify If the output file that you specify already exists it must have the same attributes as the system supplied file QACMOTRC You can stop a trace procedure in one of the following ways e Using the System Menu e Typing TRCCPIC OFF on the command line e Adding the TRCCPIC command to a CL or a REXX program e Typing TR
61. eld You can coordinate these values manually or automatically Pick one of these ways 44 Version 5 e To automatically connect the AS 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system value connect the AS 400 to a 5494 controller connecting AS 400 to a 5494 controller by Ethemet Use the following table to configure the AS 400 to a 5494 controller that is connected by Ethernet For more information about configuring the 5494 see these books IBM 5494 Remote Control Unit Planning Guide GA27 3936 IBM 5494 Remote Control Unit User s Guide GA27 3852 for an example of AS A00 AS 400 9494 AS 400 Prompt Parameter Field Subfield Value 5494 Value Notes Local ADPTADR H1 5 Values specified in the AS 400 line adapter description CRTLINTRN command address and for the 5494 Remote Controller Unit must match LAN remote ADPTADR 15 Values specified for the AS 400 adapter CRTCTLAPPC command and for address the 5494 Remote Control Unit must match Local LCLLOCNAME H1 1 Values specified for the AS 400 location CRTCTLRWS command and for the name 5494 Remote Control Unit must match This will probably match LCLLOCNAME in the network attributes This value will probably match the LCLLOCNAME in the network attributes Remote RMTCPNAME 13 Values specified for the AS 400 control CRTCTLAPPC command and for point name the 5494 Remote
62. ementations that support this option can act as an endpoint and are able to transport logical unit LU to LU session traffic across HPR networks by using RTP connections An RTP connection can only be made between two systems that support RTP That is there can only be a mix of systems in a given RTP connection s path through the network ones that only support the HPR base option and ones that support the HPR tower option However there is the stipulation that at least the two end points in the path support the HPR tower option Otherwise APPN is used Note An implementation that has the RTP Tower Option also supports the base option These systems can run as intermediate systems in the path Internetwork packet exchange support If your group or business has an established Novell LAN you can connect AS 400 into your business using the OS 400 Internetwork Packet Exchange IPX Chapter 9 Networking concepts 89 Internetwork Packet Exchange support is the AS 400 implementation of the NetWare communication protocols These protocols include IPX Sequenced Packet Exchange SPX Router Information Protocol RIP Service Advertising Protocol SAP and NetWare Link Service Protocol NLSP Other related NetWare functions are also included This set of communications protocols supports peer to peer connectivity functions in both local area networks and wide area networks What is Systems Network Architecture In IBM networks Systems Networ
63. ent networks The APPC APPN support handles all of the SNA protocol requirements when your system is communicating with a remote system that uses the LU session type 6 2 and node type 2 1 architectures The remote system can be any of the following systems e AS 400 system e System 36 e System 38 IBM personal computer e Displaywriter e Series 1 e 5520 Administrative System e RISC System 600 Reduced Instruction Set Computer e DPPX 370 Distribute Processing Programming Executive e One of the following host systems System 370 System 390 30XX processor 43XX processor 9370 system Another system that supports the appropriate level of architecture The AS 400 APPN support is an enhancement to the SNA Node Type 2 1 architecture that supplies networking functions These enhancements are easy to use are dynamic and give control of the network to the peer systems that make up the network APPN provides you with the following advanced functions e Distributed directory services e Dynamic route selection that is based on user specified values e Intermediate session routing e Routing of data by using transmission priorities With the exception of intermediate session routing HPR builds on and uses these APPN functions For more information on HPR see high performa Copyright IBM Corp 1998 2001 87 Advanced program to program communications Advanced program to program communications APPC is data communi
64. et CRTLINETH e Create Line Description Distributed Data Interface DDI CRTLINDDI e Create Line Description Frame Relay CRTLINFR e Create Line Description for IDLC CRTLINIDLC e Create Line Description Synchronous Data Link Control SDLC CRTLINSDLC e Create Line Description Token ring CRTLINTRN e Create Line Description Wireless CRTLINWLS e Create Line Description X 25 CRTLINX25 2 Use the online help information to choose the correct parameter values 3 Press Enter The line description is created Copyright IBM Corp 1998 2001 5 6 Version 5 Chapter 3 Optimizing communications performance Many factors can affect the performance of AS 400 application programs To achieve the best performance with your particular communications environment you may want to review these topics Improving wide area network performance To achieve better performance with your AS 400 when communicating in a wide area network WAN you need to consider the following Adjusting WAN protocols for optimum AS 400 performance Wide area network WAN protocols affect the communications performance on AS 400 Let us use X 25 for our example For each X 25 communications controller the AS 400 has some processing limitation for the line the line speed and the total number of virtual circuits that can be used Performance degradation can be reduced by observing these limitations To optimize AS 400 performance for wide
65. g APPN APPN NO specified for the controller and device descriptions this value must match the value specified by the RMTLOCNAME parameter on the remote system device description APPC device descriptions are automatically created as needed by the AS 400 APPN support when the following is specified on the controller description APPN YES e AUTOCRTDEV ALL Location Password LOCPWD LOCPWD This parameter must match on both the local and remote APPC device Note If you want a value other than NONE for APPN devices this value must be configured on the QAPPNRMT configuration list Mode MODE MODE For systems not using APPN APPN NO specified for the controller and device descriptions this value must match the value specified by the MODE parameter on the remote device description For systems using APPN APPN YES specified for the controller and device descriptions the specified mode description must exist on the remote system The mode description name need not be specified in the remote device description Remote location name RMTLOCNAME LCLLOCNAME For systems not using APPN APPN NO specified for the controller and device descriptions this value must match the value specified by the LCLLOCNAME parameter on the remote device description APPC device descriptions are automatically created as needed by AS 400 APPN support if APPN YES is specified for the controller description
66. guration parameters with AS 400 values A description of these AS 400 values are in the following table For information about configuring host systems see the manuals VTAM Installation and Resource Definition SC23 0111 and Network Control Program Resource Definition Reference SC30 3254 You can specify some host system parameters on multiple definition statements such as the GROUP LINE PU and LU The following table lists only the lowest level definition statement that is used by the host system To configure an AS 400 to a host system X G for an example of connecting an AS 400 to a host system e Use the following table for the line description parameter Copyright IBM Corp 1998 2001 21 AS 400 AS 400 Prompt Parameter Statement Host Definition Host Parameter Local adapter address ADPTADR PATH DIALNO Host DIALNO parameter is a concatenation of SSAP DSAP remote adapter address AS 400 CRTLINTRN command ADPTADR value must match the remote adapter address portion of the host DIALNO parameter The DSAP portion of the DIALNO parameter must correspond to the SSAP value specified on the AS 400 controller description PU MACADDR For 9370 LAN only the AS 400 line description ADPTADR must match the host MACADDR parameter MACADDR can be coded as an 8 or 12 digit hexadecimal number the 8 digit variation assumes 4000 in the first four positions 4000xxxxxxxx Connection type CNN GROUP D
67. h The block number for the 4700 first 3 digits of the AS 400 EXCHID parameter must be 057 The 4700 parameter values are decimal numbers the AS 400 values are hexadecimal X 25 link protocol LINKPCL X25CKT LLC For X 25 finance communications the LLC parameter must specify QLLC for the type of logical link control LINKPCL QLLC must also be specified on the AS 400 CRTCTLFNC command Link type LINKTYPE COMLINK TYPE 4700 TYPE parameter must match the LINKTYPE parameter specified on the AS 400 CRTCTLFNC command If LINKTYPE SDLC specify TYPE 4502 If LINKTYPE X25 specify TYPE 1424 Local location address LOCADR STATION ID If the optional LUA parameter is not specified the value specified for the 4700 ID parameter must match the value specified for the LOCADR parameter on the AS 400 create device description command If LUA is specified the LUA parameter value must match the LOCADR parameter The 4700 parameter values are decimal numbers the AS 400 values are hexadecimal Chapter 7 Communicating with remote workstation controllers 63 AS 400 AS 400 Prompt Parameter 4700 Macro 4700 Parameter Maximum MAXFRAME COMLINK CNL frame size Value specified for the 4700 CNL parameter must be coordinated with the value specified for the AS 400 MAXFRAME parameter on the CRTCTLFNC command Because the MAXFRAME parameter includes transmission and request
68. h an 8209 LAN Bridge see Appendix C Local Area Network Addressing Considerations in the Connection type CNN SDLC Switched line Communications Values specified for the FBSS and AS 400 configurations must match If the FBSS response is Yes CNN SWTPP must be specified for the CRTLINSDLC command and SWITCHED YES for the CRTCTLFNC command If the FBSS response is No CNN NONSWTPP or CNN MP must be specified for the CRTLINSDLC command and SWITCHED NO for the CRTCTLFNC command Destination service DSAP Token Ring Service access point for PC access point Communications Values specified for the FBSS and for the DSAP parameter on the CRTCTLFNC command must match Duplex DUPLEX SDLC Line mode Communications Values specified for the FBSS and AS 400 configurations must match If the FBSS response is Turn required DUPLEX HALF must be specified for the CRTLINSDLC command If the FBSS response is CRTS Continuous request to send DUPLEX FULL must be specified for the CRTLINSDLC command Chapter 7 Communicating with remote workstation controllers 65 FBSS AS 400 Configuration AS 400 Prompt Parameter Display FBSS Prompt Exchange identifier EXCHID SDLC Identification block and Identification number Communications The values specified for the FBSS controller must match the value specified in the EXCHID parameter of the CRTCTLFNC command Th
69. he wide area network WAN Therefore you should closely plan and manage its performance In general having the appropriate line speed is the key consideration for gaining the best performance To adjust the line speed for your wide area network perform these tasks e Check the difference in performance between half duplex utilization and full duplex utilization on the line description Copyright IBM Corp 1998 2001 7 e For interactive environments keep line use below 30 to maintain predictable and consistent response times Exceeding 50 line use usually slows down response time The line use can be measured with the AS 400 performance tools e For large transfer environments or for environments in which only a small number of users are sharing a line increase line use to allow for acceptable response times e The CPU usage for fractional T1 support and other high speed WAN connections is similar to any other line that runs the same type of work As the speed of a line increases from a traditional low speed to a ng speed or full T1 E1 J1 speed performance characteristics may change as follows With interactive transactions performance may be slightly faster With a large transfer performance may be significantly faster With a single job performance may be too serialized to use the entire bandwidth With high throughput performance is more sensitive to frame size With high throughput performance is more sensiti
70. hronous transfer mode ATM frame relay and integrated services digital network ISDN protocols describe the communications interface To create a network interface description do the following 1 Type one of these commands on any AS 400 command line for the type of network interface you are creating and press F4 e Create Network Interface ATM CRTNWIATM e Create Network Interface Frame Relay Network CRTNWIFR e Create Network Interface Description for ISDN CRTNWIISDN 2 Use the on line help information to choose the correct parameter values 3 Press Enter The network interface description is created Creating a network server description A network server description describes which Integrated PC Server the local area network LAN and the application will be using To create a network server description do the following 1 Type the Create Network Server Description CRTNWSD command on any AS 400 command line and press F4 2 Use the on line help information to choose the parameter settings 3 Press Enter The network server description is created Creating a line description You create line descriptions to describe the physical line connection and the data link protocol to be used between the AS 400 system and the network To create line descriptions do the following 1 Type one of these commands on any AS 400 command line to define the type of line you are creating and press F4 e Create Line Description Ethern
71. imary or controlling computer in a communications network e One connection to an asynchronous device through the X 25 network packet assembler disassembler PAD function e One connection to an asynchronous communications host system through AS 400 PAD emulation e One user defined communications facility e One Transmission Control Protocol Internet Protocol TCP IP link to an adjacent IP node or gateway A gateway is a device that is used to connect two systems that use two different communications protocols X 21 network In data communications a specification of the International Telegraph and Telephone Consultative Committee CCITT that defines the connection of data terminal equipment to an X 21 public data network The AS 400 system supports short hold mode SHM operation for use with X 21 circuit switched networks X 21 short hold mode is characterized by a series of connections and disconnections with a remote controller or system on an X 21 circuit switched line When there is no data traffic the connection is broken but the SNA sessions remain active When either side has data to send the connection is established again Chapter 10 Common networking standards 95 96 Version 5 Printed in U S A
72. in question 423 must match NRZI data NRZI 313 NRZ or NRZI Encoding encoding For SDLC lines only the values specified on the CRTLINSDLC command and in question 313 must match as follows If NRZI NO 313 0 If NRZI YES 313 1 Source service SSAP 940 Ring Address Assignment access point The value specified for the SSAP parameter on the CRTCTLRWS command must match the SAP associated with the Ring adapter address of the AS 400 system on the Ring Address Assignment display Used for token ring only Short hold SHM 367 X 21 Switched Short Hold Mode mode Values specified on the CRTCTLRWS command and in question 367 match as follows If SHM NO 367 0 If SHM YES 367 2 Station address STNADR 104 Control Unit Address Value specified for question 104 must match the STNADR specified on the CRTCTLRWS command Switched SWITCHED 317 Telecommunication Facilities connection Values specified on the CRTLINSDLC command and in question 317 match as follows If SWITCHED NO 317 0 If SWITCHED YES 317 1 Note If you are using a 3174 Model 1L Gateway to connect an AS 400 system to a host system on a Token Ring the value specified for item 900 Token Ring Network Address of the Gateway must match the value specified for the ADPTADR parameter on the CRTCTLHOST command Matching AS 400 parameters for a 3274 controller You match the AS 400 configuration parameters with the configuration ques
73. ion 5 Ga m tn to po e i j 2 10 a APFNE NG 3 6 1 l AS 400 BAG Line Description LINSBLC LINDCADLINGL 14 RSRCNAME LINGLL a ROLE HEGI CHNC SWTPPY EXCH IDCOSGEEEEE LINESPEED 2400 4 SWICHHE ANS AUTOANS ES ALTODIALC NGN STNADR BL Controller Descr CTLAPPC CTLDLADASABU A a LIHNKTYPEC S DLC a SWITCHED YES SWTLINLSTCADLINGL 1 a EXCHIDCOS6FFFFF a INLCHNE ANS 4 ROLE NEG 4 STNADR B1 Device Description DEVAPPC DEVOCADASIBU 4 12 FMTLOCHAME ADAQOBUA 11 LOLLOCHAME AD4OQBUS CTLUADAS ABA 13 MODE BLANK 10 a APPHE HO SHGSSN ENO AV aT2 100 Chapter 7 Communicating with remote workstation controllers You can configure the AS 400 system to communicate with another AS 400 system a non AS 400 system or a remote controller This configuration requires the coordination of configuration parameters and values To configure your AS 400 to communicate with remote workstation controllers see the following Matching AS 400 parameters for 5494 controllers You must coordinate the configuration parameters and values to configure the AS 400 system to communicate with a 5494 controller You can coordinate these values automatically or manually Pick one of the ways e To automatically connect the AS 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system val
74. ion problems using reason codes Chapter 9 Networking concepts Advanced Peer to Peer Networking 7 Advanced program to program communications Dependent LU requester support High performance routing HPR architecture option sets Internetwork packet exchange support What is Systems Network Architecture What is TCP IP Chapter 10 Common networking standards Local area network standards ATM on AS 400 Distributed data interface network Ethernet networks Token ring networks Wireless network Wide area network standards Asynchronous communications Binary synchronous communications Frame relay networks Fu Integrated services digital network i Synchronous data link control network X 25 network X 21 network iV Version 5 Part 1 Getting started with AS 400 communications The AS 400 is an extremely versatile system for networking technologies supporting a broad range of communication protocols Protocols that are supported include TCP IP APPC APPN HPR Remote workstation asynchronous and binary synchronous communications AS 400 communications configuration is done by either manually or automatically creating a set of j that represent the local and remote systems that are to communicate The types of objects required for a communications configuration vary depending on the type of communications being configured Many factors can affect the performance of the AS 400 in a communications environme
75. ions Duplex DUPLEX DUPLEX Depending on the type of communications used the values specified for the DUPLEX parameters may need to be coordinated Ethernet standard ETHSTD ETHSTD Values specified for each system must be coordinated Both systems must specify the same standard ETHV2 or IEEE8023 or at least one system must specify ALL Exchange identifier EXCHID EXCHID Remote AS 400 controller description EXCHID must match the local AS 400 line description EXCHID The first three digits of the exchange identifier known as the block number is 056 for the AS 400 line You can use the Work with Line Descriptions WRKLIND command to determine this value Logical channel entries LGLCHLE LGLCHLE If X 25 DCE support is specified X25DCE YES or X25DCE NEG logical channel types and channel numbers must be coordinated See also the considerations for the X25DCE parameter Line speed LINESPEED LINESPEED For asynchronous lines the line speeds specified for each system must match Modulus MODULUS MODULUS If X 25 DCE support is specified X25DCE YES or X25DCE NEG modulus values specified for each system must match The values specified for this parameter should match for all communications types Local network address NETADR CNNNBR For switched virtual circuits SVCs the NETADR parameter on the local system line description must match the CNN
76. k Architecture SNA is the layered logical structure formats protocols and operational sequences that are used for transmitting information units through networks SNA also controls the configuration and operation of networks APPC APPN and HPR are some examples of the protocols included within SNA They can be used to connect the AS 400 with other IBM systems or non IBM systems to connect remote controllers and to maintain a high level of security on your system What is TCP IP Transmission Control Protocol Internet Protocol TCP IP is a set of network protocols that enables computers to share resources and exchange information across a network TCP IP allows hosts to communicate with each other regardless of the host or user s physical location the operating system or the network medium TCP IP operates in many different network environments that include the Internet and corporate Intranets For more information see the topic TCP IP configuration fastpathl 90 version 5 Chapter 10 Common networking standards These topics introduce the types of common networking standards that are supported by the AS 400 system See the following topics for more information Local area network standards A LAN local area network is a communications system that allows interconnection and the sharing of resources between independent devices within a moderately sized geographic area These topics introduce the types of local area net
77. l MAXADATA 1994 AS 400 maxdata MAXFRAME LINKTYPE NETID APPH AS 400 local network ID FMTNETID US IBMZP i FMTCPNAME R5 CDRH PATH PATH LCLEXCHID 05613014 I GRPNM TRNOO1G DIALNO 06044000000003 65 DSAP 04 Dim SSAP 04 APPH WYES de ADPTADR 400037000001 NCP Generation Token Ring Definition PORTADD 06 TRNOOIPA Line LOCADD 400037 000001 ANS CONTINUE TRNOOLPA PU ADDR 01 PHYSRSC TRNOO1PA TRNOOLG Group ECLTYPE LOGIC RV4T207 0 Example 4 AS 400 with APPN connection to VTAM This diagram shows the AS 400 values that need to match the VTAM values when you connect with APPN Chapter 5 Communicating with host systems 29 AS 400 System YTAM Licensed Program Y TAM Start Up Parameters CPCP YES ALLOW LEASED OR SWITCHED CP CP SESSIONS X NODETYPE NN ALSO NETWORK NODE x NETID USIEMZP NETWORK ID x ANETALS YES NON NATIVE NETWORK SUPPORT X SSCPNAME RSCDFM SSCPHAME X Network Attributes Cross Domain Resource Definition LCLCPNAME ASDLUR CDRDDLUR VBUILD TYPE CDRSC NETWORK NETID APPN LCLNETID APPH ASDLUR CDRSC Host Controller Description Switched Major Node Definition CTLD DA32AI DLA327 VBUILD LINKTYPE DLUR LCLEXCHID 05643271 DA327A PU INLCHN DIAL IDBLK 056 PRIDLUS R5CDRM IDNUM A327 1 US IBMZP NETID APPN DEPPUNAME DAS27A Display Device Description 3270 SNA Pass Through DEYD DA32FAOSSN DA327A05 LU LOCADR 05 LOCADDR 05 CTL DA327AI SNPTCLS UP DEPLOCNAME DA327A05 Display Device Description Emulatio
78. le identifiable sequence of processing actions that represents a single use of the system The basic types of jobs that are performed are interactive jobs batch jobs spooling jobs autostart jobs and prestart jobs Batch jobs are predefined groups of processing actions that are submitted to the system to be performed with little or no interaction between the user and the system Batch jobs can be tuned for optimized performance To optimize batch jobs for communications consider the following e Break the application into pieces and having multiple batch threads jobs operate concurrently e Reduce the number of open and close operations input and output operations e If you have a considerable amount of main storage available consider using the Set Object Access SETOBJACC command This command preloads the complete database file database index or program into the assigned main storage pool if sufficient storage is available The objective is to improve performance by eliminating disk read write operations e Try to limit the number of communications input and output operations by doing fewer and perhaps larger application sends and receives when communications lines are used e Block the data in the application Try to place the application on the same system as the frequently accessed data For more information about batch job performance see the Commun Mixing interactive and batch jobs on a WAN line When interactive user
79. ler see the BM 4680 Store System Programming Guide To configure the AS 400 to a 4680 4690 controller A for an example of an AS 400 e Use the following table to connect an AS 400 to a 4680 4690 retail controller AS 400 Prompt Exchange identifier AS 400 Parameter EXCHID 4680 Link Parameter For switched lines only the 4680 EXCHANGE ID parameter must match the EXCHID parameter specified on the AS 400 CRTCTLRTL command 73 Chapter 7 Communicating with remote workstation controllers AS 400 Prompt AS 400 Parameter 4680 Link Parameter Local location LOCADR 4680 SESSION ADDRESS parameter must match the LOCADR address parameter specified on the AS 400 CRTDEVRTL command Session address 01 is reserved for host command processor sessions SSCP identifier SSCPID 4680 SSCP ID parameter must match the SSCPID parameter specified on the AS 400 CRTCTLRTL command Matching AS 400 parameters for 4684 retail controllers You must coordinate parameter values with the AS 400 and the 4684 retail controller when running IBM Retail Industry Programming Support Services RIPSS The following table lists those parameters AS 400 parameters are listed in alphabetical order the commands on which the parameters are specified are included in the rightmost column of the table For more information about configuring for RIPSS on the 4684 see the BM Retail Industry Programming Support Service
80. lines on the same communications controller subsystem at the same time Only one trace can exist for the same configuration object at the same time The system supports all line speeds and protocols For more information about these tests contact your IBM service representative Trace Common Programming Interface CPI Communications TRCCPIC command You can start to trace Common Programming Interface CPI Communications either before running a job or after a job is active to find out where the error might have occurred The TRCCPIC command captures information about CPI Communications calls that is processed by your program The system collects trace information in a current job or in a job that is serviced by a Start Service Job STRSRVJOB command For a CPI Communication program you could trace a job that is started as a result of a received program start request You can issue the TRCCPIC command in one of the following ways e Using the System Menu e Typing TRCCPIC ON on a command line e Adding the TRCCPIC command to a control language CL or a REstructured eXtended eXecutor REXX program e Typing TRCCPIC on the command line and pressing F4 Prompt If you type TRCCPIC on the command line and press F4 an initial prompt is displayed for the Trace Option Setting If ON is specified and you press enter the Trace CPI Communications display appears This display enables you to set the following parameters Trace option set
81. multaneous 10 Mbps receiving and 10 Mbps sending paths Fast Ethernet Fast Ethernet is a recently established standard IEEE 802 3U that increases Ethernet by operating speeds from 10 Mbps to 100 half or full duplex AS 400 Ethernet adapters support 100BASE TX network devices that use category 5 shielded and unshielded twisted pair STP UTP cable For more information see Ethernet Token ring networks A token ring network is one LAN topology that sends data in one direction throughout a specified number of locations by using the token The token is the symbol of authority for control of the transmission line This token allows any sending station in the network ring to send data when the token arrives at that location Stations in a token ring network are physically connected usually in a star wired ring topology to a wiring concentrator such as the IBM 8228 Multistation Access Unit The concentrator serves as a logical ring around which data is transmitted at 4 million or 100 million bits per second Mbps Each station is connected to the concentrator typically by shielded twisted pair STP cabling Full duplex token ring In full duplex token ring which is also called DTR dedicated token ring switching hubs enable stations to send and receive data on the network simultaneously A token ring switching hub divides the network into smaller segments When a station transmits its data packet the token ring switch reads the packet
82. n DEYD DA32FA13EM LOCADR oD CTL DA32FAI DEPLOCNAME DA327A13 LOCADDR 0D Display Device Description DHCF DEYD DA327A18HC LOCADR 12 CTL DA327AI DEPLOCNAME DA32FAIS LOCADDR 18 Host Controller Description CTLD DA327BI LINKTYPE DLUR PRIDLUS R5CDRM US IBMZP DA327B PU LCLEXCHID 05643272 IDBLK 056 INLCNN DIAL IDNLM A3271 DEPPUNAME DA327B NETID APPN Display Device Description DEYD DA327B13EM DA327B13 LU LOCADR oD LOCADDR 0D CTL DA327BI DEPLOCNAME DA327B13 FVAT2OS O 30 Version 5 Configuring dependent LU requester DLUR Dependent LU Requester DLUR allows dependent secondary logical units LU 0 1 2 and 3 an entry point into the APPN network DLUR support gives the appearance of having an adjacent connection to VTAM but allows traversing the APPN network through intermediate nodes Note DLUR uses logmode CPSVRMGR This is created internally as part of the APPN and DLUR support If CPSVRMGR exists as a user defined logmode on any of the systems in your network it must be deleted Use the Work with Mode Descriptions WRKMODD command and specify the option to delete CPSVRMGR To configure the AS 400 system to communicate with DLUR perform these steps the APPN parameter Configuring the host controller description Use the Create Controller Description SNA Host CRTCTLHOST command to create the controller description If you have already created a controller description for such functions as 3270 emulation or
83. nd bridges in a FDDI network are physically connected to one of the counter rotating rings or both of the counter rotating rings The rings operate at 100 Mbps FDDI networks allow devices to be attached to one or both of the rings Usually only the primary ring in a FDDI network is active The secondary ring is used to maintain the network when a dual access station or a concentrator becomes inactive Ethernet networks Ethernet is one type of local area network LAN topology that is supported by the Operating System 400 licensed program OS 400 Ethernet provides support for the Digital Equipment Corporation Intel Corporation and Xerox standard Ethernet Version 2 and the IEEE 802 3 standard Copyright IBM Corp 1998 2001 91 Half duplex Ethernet Generally multiple stations in an Ethernet network show a single data path Therefore only one station may transmit data at a time This is called half duplex Ethernet The station may transmit only or receive only but not both simultaneously Full duplex Ethernet Full duplex Ethernet enables stations to simultaneously send and receive data on the network eliminating collisions This is accomplished through the use of a full duplex LAN switch Ethernet switching splits a large Ethernet into smaller segments Full duplex Ethernet requires the following e Twisted pair cable transmission medium e Ethernet network interface cards e A full duplex LAN switch Full duplex 10 Mbps ethernet has si
84. nged or removed For more information about configuring CPI Communications see Chapter 4 Communications applications 19 20 Version 5 Chapter 5 Communicating with host systems You can configure the AS 400 system to communicate with a host system by matching AS 40d Another option for AS 400 users is Dependent LU Requester Support DLUR DLUR allows dependent secondary logical units LU 0 1 2 and 3 an entry point into the APPN network DLUR support gives the appearance of having an adjacent connection to VTAM but allows traversing the APPN NEw auch intermediate nodes To configure DLUR see the page K Matching AS 400 parameters for a host system You can configure the AS 400 system to communicate with a host system This configuration requires the coordination of parameters and values The list contains only those configuration prompts and parameters that require coordination on both the AS 400 and the host system In addition some of the parameters that are listed may not apply to your particular configuration For ne of connecting an AS 400 to a host system see For information about configuring host systems see the manuals VTAM Installation and Resource Definition SC23 0111 and Network Control Program Resource Definition Reference SC30 3254 e For more information on AS 400 parameters see Matching AS 400 line description parameters for a host system You must match host system communications confi
85. nt To achieve the You can configure your AS 400 system to communicate with another AS 400 system a non AS 400 system or a remote controller For information on how to do this see the following Vous can find information related to some of the technologies common to deploying moder networking solutions in an AS 400 environment Copyright IBM Corp 1998 2001 1 2 Version 5 Chapter 1 Print this topic To view or download the PDF version select G or 110 pages j about 721 KB To save a PDF on your workstation for viewing or printing Open the PDF in your browser click the link above In the menu of your browser click File Click Save As Navigate to the directory in which you would like to save the PDF Click Save aaron If you need Adobe Acrobat Reader to view or print these PDFs you can download a copy from theAdobd eh sit www adobe com prodindex acrobat readstep html Copyright IBM Corp 1998 2001 A Version 5 Chapter 2 Configuring AS 400 for communications Follow these steps to configure your AS 400 1 Depending on the type of hardware you have you may need to refer to the following topics e Creating a network server description e Creating a ine 4 2 You define lines by creating to a network server or a network interface Depending on your hardware the lines may be attached Creating a network interface description Network interface descriptions for async
86. ol IDLC to connect two systems to exchange information over an ISDN B channel IDLC complies with the data link control protocols that are defined in CCITT Recommendations Q 921 and Q 922 IDLC defines a set of protocol rules and formats for use on D channels and B channels On the D channel IDLC provides a reliable link with the network equipment On the B channel IDLC provides a reliable link with another end user Similar to other data link protocols IDLC has special considerations for operation e IDLC parameters used to establish the logical connection e Delayed contact for permanent connection e Frame size related to performance e Disconnect parameters for a switched IDLC controller Synchronous data link control network SDLC has the following meanings e A form of communications line control that uses commands to control the transfer of data over a communications line e A communications discipline that conforms to subsets of the Advanced Data Communication Control Procedures ADCCP of the American National Standards Institute ANSI and high level data link control HDLC These standards are part of the International Organization of Standardization SDLC is used for transferring synchronous code transparent serial by bit information over a communications line Transmission exchanges may be duplex or half duplex over switched or nonswitched lines The configuration of the connection may be point to point multipoint or loop
87. ommand and for name the 5494 Remote Control Unit must match 42 Version 5 5494 AS 400 AS 400 Prompt AS 400 Parameter Field Subfield Value 5494 Value Notes Link type LINKTYPE AA LAN 4 5494 configuration values must match the values specified for the LINKTYPE parameter on the CRTCTLAPPC command For advanced program to program communications APPC controllers that specify LINKTYPE SDLC the value specified in the 5494 configuration must be compatible with the physical interface INTERFACE parameter specified on the CRTLINSDLC command Select 4 for the network connections Example Connecting AS 400 to a 5494 controller connected by token ring Configuration parameters must be coordinated when you connect an AS 400 system to a 5494 controller that is connected by token ring The following diagram shows the AS 400 parameters and 5494 parameters that need to match when you use token ring Chapter 7 Communicating with remote workstation controllers 43 AS 400 System 5494 Controller Network Attributes DWS Configuration Screen 2 Network Information LCLLOCNAME RCHAS218 11 DALNET Default local network name LCLNETID DALNET 12 DAL5 494 5494 LU name 13 DAL5494 _ 5494 CP name 14 ORMTWSC 5494 Default mode name 15 40005494E00 5494 Token ring address H1 1 RCHAS218 AS 4
88. on ICF to write application programs that you want to communicate with advanced program to program communications APPC ICF also provides program to device communications between the AS 400 system and hardware devices You must determine which system is to send data first before you write the program ICF data management handles the communication functions and the data for your program In particular ICF should be used to do tasks that include repetitive small inputs To optimize ICF performance consider the following e Eliminate unused record formats e Use separate record formats instead of multipurpose record formats with option indicators e Code to use the same record format for repeated operations e Set the maximum program devices equal to 1 e Use a nonshared file e Use a separate indicator area e The use of the ICF keywords force data and confirm should be minimized e Use the Request to Send keyword only when necessary e Use the Invite Only keyword when soliciting input from multiple devices otherwise use the Read keyword instead e If using the Invite keyword to solicit from multiple program devices follow it with a Read from invited operation not a Read operation To create device descriptions to get your system set up for ICF do the following 1 Type the appropriate Create Device Description commands on the AS 400 command line and press F4 2 Use the online help information to choose the parameter values 3
89. ontrol Unit Planning Guide GA27 3936 IBM 5494 Remote Control Unit User s Guide GA27 3852 Copyright IBM Corp 1998 2001 41 AS A00 AS A00 Prompt AS 400 Parameter Field Subfield Value 5494 Value Notes Local ADPTADR H1 5 Values specified in the AS 400 adapter line description CRTLINTRN address command and for the 5494 Remote Controller Unit must match local area ADPTADR 15 Values specified for the AS 400 network CRTCTLAPPC command and LAN for the 5494 Remote Control remote Unit must match adapter address Destination DSAP F Values specified for the AS 400 service CRTCTLAPPC command and access for the 5494 Remote Control point Unit must match Local LCLLOCNAME H1 1 Values specified for the AS 400 location CRTCTLRWS command and for name the 5494 Remote Control Unit must match This will probably match LCLLOCNAME in the network attributes This value will probably match the LCLLOCNAME in the network attributes Remote RMTCPNAME 13 Values specified for the AS 400 control CRTCTLAPPC command and point name for the 5494 Remote Control Unit must match Remote RMTNETID 11 3 Values specified for the AS 400 network CRTCTLAPPC and identifier CRTCTLRWS commands and for the 5494 Remote Control Unit must match This will probably match LCLNETID in the network attributes and H1 2 Remote RMTLOCNAME 12 Values specified for the AS 400 location CRTCTLRWS c
90. ontrollers AS 400 prompts are listed in alphabetical order by parameter name the AS 400 commands on which the parameters are specified are included in the rightmost column of the table For more information about configuring FBSS controllers see the BM Financial Branch System Services Installation Planning and Administration Guide SC19 5173 For more information about configuring the 4700 controllers see Volume 6 of the 4700 Finance Communication System Controller Programming Library GC31 2068 To configure the AS 400 to a FBSS fnance controller X 67 for an example of connecting an AS 400 to a 4701 ae le e Use the following table to connect an AS 400 to a 4701 finance controller 64 Version 5 FBSS AS 400 Configuration AS 400 Prompt Parameter Display FBSS Prompt LAN adapter address ADPTADR Token Ring PC address Communications If the AS 400 system uses a Token Ring network line to connect to the FBSS controller values specified for the FBSS and on the ADPTADR parameter on the CRTLINTRN command must match If the AS 400 system uses an Ethernet line through an 8209 LAN Bridge see Appendix C Local Area Network Addressing Considerations in the Host 37xx 4700 address If the AS 400 system uses a Token Ring network line to connect to the FBSS controller values specified for the FBSS and on the ADPTADR parameter on the CRTLINTRN command must match If the AS 400 system uses an Ethernet line throug
91. ontrollers 67 Matching AS 400 parameters for 3651 retail controllers You must coordinate several parameter values for retail communications These values are specified for the AS 400 system and the 3651 retail controller The following table lists those AS 400 parameters that must match values for the 3651 retail controllers Before you match parameters for 3651 retail controllers you need to match AS 400 controller device and line descriptions parameters with the host system AS 400 parameters are listed in alphabetical order the commands on which the parameters are specified are included in the rightmost column of the table For more information about configuring the 3651 controller see the BM Programmable Store System Language and Host Services Macro Reference To configure the AS 400 to a 3651 retail controller use the following table AS 400 3651 Definition AS 400 Prompt Parameter Statement 3651 Parameter Connection type CNN QFHOST SDLCLIN Value specified for the AS 400 CNN parameter on the CRTLINSDLC command must match the values specified for bits 2 and 3 of the 3651 SDLCLIN parameter Duplex DUPLEX QFHOST SDLCLIN Value specified for the AS 400 DUPLEX parameter on the CRTLINSDLC command must match the value specified for bit 6 of the 3651 SDLCLIN parameter Exchange identifier EXCHID QFHOST SENDID 3651 SENDID parameter must match the last 5 digits of the EXCHID parameter specified on the AS 400 CRT
92. or Log do the following 1 Type PRTERRLOG Print Error Log on any AS 400 command line Press the Enter key The command places a formatted printer file of the machine error log in a spooled printer file that is named QPCSMPRT or in a specified output file 2 Find and read these error logs For more information about displaying the Print Error Log see the een nena N book A variety of job logs may contain information that helps you_ determine the cause of a communications problem For a detailed description of these job logs see Job logs and communication problems A variety of job logs may contain information that helps you determine the cause of a communications problem Many of these logs contain messages that can help you understand what the system has done concerning your communications functions The following are some of the most useful jobs to review when you have a communications problem QSYSARB System arbiter This job log is for devices and communications in general It also contains ONLINE at IPL messages QSYSCOMM1 Communications and input output system job This job log is for problem logging and for local area network LAN manager messages It also contains ONLINE at IPL messages for network servers and their lines QCMNARBO1 through QCMNARB99 Communications arbiter These job logs contain information for communications startup take down and error recovery QLUS Logical unit services QLUR Logical unit LU 6 2
93. or the AS 400 control CRTCTLAPPC command and for point name the 5494 Remote Control Unit must match Remote RMTNETID 11 3 Values specified for the AS 400 network CRTCTLAPPC and CRTCTLRWS identifier commands and for the 5494 Remote Control Unit must match This will probably match LCLNETID in the network attributes and H1 2 Remote RMTLOCNAME 12 Values specified for the AS 400 location CRTCTLRWS command and for the name 5494 Remote Control Unit must match Chapter 7 Communicating with remote workstation controllers 55 5494 AS 400 AS 400 AS 400 Prompt Parameter Field Subfield Value 5494 Value Notes Station STNADR 2 Values specified in the AS 400 address controller description and for the 5494 Remote Control Unit must match This value must also be specified as the last 2 digits of the AS 400 EXCHID parameter Example Connecting AS 400 to a 5494 controller connected by X 25 Configuration parameters must be coordinated when you connect an AS 400 system to a 5494 controller The following diagram shows the AS 400 parameters and 5494 parameters that need to match when you use X 25 56 Version 5 AS 400 System Network Attributes LCLLOCNAME RCHAS218 LCLNETID CHINET O Line Description al CRTLINK25 LIND CHILINE LGLCHLE 002 PYC NETADR OT APPC Controller Description CTLD CHIAPPC LINKTYPE 25 SWITCHED NO LINE CHILINE Ei RMTHETID NETATR RMTCPNAME CHI5494
94. ou can start to trace Common Programming Interface CPI Communications either before running a job or after a job is active to find out where the error might have occurred The TRCCPIC command captures information about CPl Communications calls that is processed by your program For more information on how to access System Service Tools see the can book Chapter 8 Troubleshooting communications problems 81 System service tools and communication problems You may sometimes need to obtain an error log printout or communications trace data that your IBM service representative can review For the line trace someone familiar with the protocol used on the line may need to review the files You can use these additional functions through the system service tools using the Start System Services Tool STRSST command Because System Service Tool SST also provides other functions only the correctly authorized user profiles with CRTUSRPRF SPCAUT SERVICE should use the STRSST command The system supplied profiles QSECOFR and QSRV have this authority Use the communications trace function in the following situations e Message information or other problem analysis is not sufficient to identify a problem e Communications support personnel suspects a protocol error e To verify that the system sends and receives valid data You can trace multiple lines from each workstation by using the communications trace option The system traces a maximum of two
95. pecify the devices an interactive subsystem should allocate when the subsystem is started ADDWSE SBSD libname sbsname WRKSTN devname AT SIGNON To specify the devices an interactive subsystem should not allocate when the subsystem is started ADDWSE SBSD libname sbsname WRKSTN devnamex AT ENTER e See the following lexamplel for a way of configuring your interactive subsystem 12 Version 5 Example Interactive subsystem configuration 1 Create a subsystem description CRTSBSD SBSD MYLIB MYINTER POOLS 1 BASE 2 INTERACT 2 Create a class CRTCLS CLS MYLIB MYCLASS RUNPTY 20 3 add routing entries to your subsystem ADDRTGE SBSD MYLIB MYINTER SEQNBR 10 CMPVAL QCMDI PGM QSYS QCMD POOLID 2 ADDRTGE SBSD MYLIB MYINTER SEQNBR 9999 CMPVAL ANY PGM QSYS QCMD POOLID 2 4 Create a job queue and add the job queue entry to your new subsystem CRTJOBQ JOBQ MYLIB MYJOBQ ADDJOBQE SBSD MYLIB MYINTER JOBQ MYLIB MYJOBQ MAXACT 200 5 Set up the workstation name entries Remove all the ALL workstation type entries first and then add the appropriate workstation name entries RMVWSE SBSD QSYS QINTER WRKSTNTYPE ALL ADDWSE SBSD QSYS QINTER WRKSTN QPADEV ADDWSE SBSD MYLIB MYINTER WRKSTN PC 6 If desired update your system startup program to start your new subsystems automatically Communications performance considerations for batch jobs Each piece of work run on the AS 400 system is called a job Each job is a sing
96. plication program interface API performance considerations Performance considerations for intersystem communications function Performance considerations for Common Programming Interface Communications Chapter 5 Communicating with host systems Matching AS 400 parameters for a host system Matching AS 400 line description parameters for a host system Matching AS 400 controller description parameters for a host system Matching AS 400 device description parameters for a host system Matching AS 400 mode and class of service description parameters for a host system f Configuring dependent LU requester DLUR Configuring the host controller description Configuring the device descriptions Chapter 6 Communicating with a remote AS 400 system Matching AS 400 line description parameters for a remote AS 400 system Matching AS 400 controller description parameters for a remote AS 400 system Matching AS 400 device description parameters for a remote AS 400 system Connecting one AS 400 to another AS 400 system Chapter 7 Communicating with remote workstation controllers Matching AS 400 parameters for 5494 controllers Matching AS 400 parameters for a 5494 connected by token ring Matching AS 400 parameters for a 5494 connected by Ethernet Copyright IBM Corp 1998 2001 _ wo o 01 01 01 OOOONNNN Matching AS 400 parameters for a 5494 connected by frame relay Matching AS 400 parameters for a 5494 connected by SDLC Ma
97. r Connection CNN QFSFGLNK LINECON type Value specified for the AS 400 CNN parameter on the CRTLINSDLC command must match the values specified for bits 2 and 3 of the 3684 LINECON parameter Duplex DUPLEX QFSFGLNK LINECON Value specified for the AS 400 DUPLEX parameter on the CRTLINSDLC command must match the value specified for bit 6 of the 3684 LINECON parameter 70 Version 5 3684 AS 400 AS 400 Definition Prompt Parameter Statement 3684 Parameter Exchange EXCHID QVSFGLNK SENDID identifier 3684 SENDID parameter must match the last 5 digits of the EXCHID parameter specified on the AS 400 CRTCTLRTL command RECVID 3684 RECVID parameter must match the last 5 digits of the EXCHID parameter specified on the AS 400 CRTLINSDLC command This parameter is used only for switched line communications Modem data MODEMRATE QFSFGLNK LINECON rate Value specified for the AS 400 MODEMRATE parameter on the CRTLINSDLC command must match the value specified for bit 5 of the 3684 LINECON parameter NRZI data NRZI QFSFGLNK LINECON encoding Value specified for the AS 400 NRZI parameter on the CRTLINSDLC command must match the value specified for bit 1 of the 3684 LINECON parameter Switched SNBU QFSFGLNK LINECON network backup Value specified for the AS 400 SNBU parameter on the CRTLINSDLC command must match the value specified for bit 4 of the 3684 LINECON parameter SSCP identifier SSCPID Q
98. r calls from the AS 400 system or to manually call the AS 400 system If CNN SWTPP SWITCHED YES INLCNN ANS and either SWTCNN ANS or SWTCNN BOTH are specified for the AS 400 system specify CONNECTION TYPE 4 for the 4680 This configuration requires the 4680 to manually call the AS 400 system Initial connection INLCNN See description for the CNN Connection type parameter Modem data rate MODEMRATE 4680 DATA RATE parameter must match the MODEMRATE parameter select specified on the AS 400 CRTLINSDLC command NRZI data encoding NRZI 4680 NRZI MODE parameter must match the NRZI parameter specified on the AS 400 CRTLINSDLC command Station address STNADR 4680 STATION ADDRESS parameter must match the STNADR parameter specified on the AS 400 CRTCTLRTL command Switched SWITCHED See description for the CNN Connection type parameter connection Switched SWTCNN See description for the CNN Connection type parameter connection Matching AS 400 parameters for 4680 4690 LINK parameter You must coordinate parameters between the AS 400 and the 4680 store controller The following tables lists the parameter values The 4680 controller requires configuration of the SDLC SNA LINK parameter AS 400 parameters are listed in alphabetical order the commands on which the parameters are specified are included in the rightmost column of the table For more information about configuring the 4680 control
99. remote AS 400 system 35 AS 400 Remote AS 400 AS 400 Prompt Parameter Parameter Notes Exchange identifier EXCHID EXCHID If used the local AS 400 controller description EXCHID must match the remote AS 400 line description EXCHID The first three digits of the exchange identifier known as the block number is 056 for the AS 400 line You can use the WRKLIND command to determine this value Initial connection INLCNN INLCNN Values specified for each system must be coordinated INLCNN ANS must not be specified for both systems Link protocol LINKPCL LINKPCL For X 25 connections values specified for each system must match both must be QLLC or ELLC Remote control point RMTCPNAME LCLCPNAME RMTCPNAME specified on the local AS 400 system name controller description must match the local control point name specified in the network attributes of the remote AS 400 system Remote network RMTNETID LCLNETID RMTNETID specified on the local AS 400 system identifier controller description must match the local network ID specified in the network attributes of the remote AS 400 system Data link role ROLE ROLE The value specified for the local AS 400 controller description ROLE parameter must match the remote AS 400 line description ROLE value X 25 reverse charging RVSCRG RVSCRG Values specified for each system must be coordinated Switched network SNBU SNBU Values specified for each system must match back
100. resynchronization job This job log is for two phase commit synchronization processing 80 Version 5 QPASVRP Target 5250 display station pass through primary server job This job log is for target pass through communications functions QPASVRS Target 5250 display station pass through secondary server job These contain more detailed messages for target pass through communication functions Subsystem jobs QINTER and QCMN Interactive subsystem and communication subsystem These job logs are for subsystem jobs For more information on pass through primary jobs see the Remote Work Station Suppod book Solving communication problems using communications trace Sometimes program debugging tasks are easier if you can trace the data that is sent and received on the communications line or within the network server To run a communications trace use the following commands STRSST Start Service Tools The STRSST command takes you to a menu of tools to obtain error log information and communications trace information For a detailed description of system service tools see ser STRCMNTRC Start Communications Trace The STRCMNTRC command starts a communications trace for the specified line network interface description or network server description The communications trace continues until one of the following occurs e The system runs the End Communications Trace ENDCMNTRC command e A physical line problem causes the trace to end e
101. ription parameter AS 400 Prompt AS 400 Parameter Host Definition Statement Host Parameter Local location name LCLLOCNAME DFHTCT NETNAME AS 400 LCLLOCNAME value must match CICS VS terminal control table NETNAME parameter and the label used on the LU definition statement Local location address LOCADR LU LOCADDR Values specified for each system must match The LOCADDR parameter is a decimal value 0 255 the AS 400 value is specified as a 2 digit hexadecimal number Location password LOCPWD DFHTCT BINDPWD Values specified for each system must match Dependent location name DEPLOCNAME LU LU This parameter is only used for DLUR support This value is optional If specified it must match LUNAME received on ACTLUREQUEST Mode description name MODE MODEENT LOGMODE AS 400 mode description name must be defined in the host logon mode table using the LOGMODE parameter on the MODEENT macro instruction The mode name must also be included in the CICS VS terminal control table DFHTCT MODENAM parameter Remote location name Remote network identifier RMTLOCNAME RMTNETID BUILD LOGAPPL Values specified for each system must match NETID Values specified for each system must match For more information on AS 400 parameters see Matching AS 400 mode and class of service description parameters for a host system Yo
102. rollers and devices which support the MSGQ parameter the message queue is specified in the configuration object e For display devices the message queue that matches the device name 2 Press the Enter key 3 In the Display Message display read the messages pertaining to communications problems that are displayed in the message queue The object name in the message directs you to the communications objects in error 4 For messages in the queue with an in the farthest left position press F14 to perform additional tests This calls the Work with Problems tool For related information see Copyright IBM Corp 1998 2001 79 Displaying the Product Activity Log to solve communication problems The Print Error Log and the Product Activity Log provide you with important information for solving communications problems To view the product activity log do the following 1 Display or print the product activity log using these steps e Type STRSST Start System Service Tools on any AS 400 command line and press the Enter key e Inthe System Service Tools menu select Option 1 to display or print the product activity log For more information about the Product Activity Log see the For related information see Displaying the Print Error Log to solve communication problems The Print Error Log and the Product Activity Log provide you with important information for solving communications problems To view the Print Err
103. rotocol stack That is intersystem communications function ICF and common programming interface communications CPI Communications perform the best with advanced program to program communications APPC There is additional CPU time when the crossover between the protocols processes e Each communications interface performs differently depending on the scenario ICF and CPI Communications perform the best with APPC Note An alternative to AnyNet communications is to have SNA and TCP IP running parallel or over the same lines in your network Hence performance implications can be surpassed by not using AnyNet For more information about AnyNet 400 sockets see the book Sackers Programming amp a Setting up the AnyNet environment AnyNet 400 is an AnyNet family product These products allow you to use application programs that are written for a certain communications protocol but also run over non native communications protocols without changing or even re compiling the application program The choice of the destination address controls whether the request is sent over the native protocols or through the AnyNet code and on to a non native protocol To configure Transmission Control Protocol Internet Protocol TCP IP over advanced program to program communications APPC you need to take two basic actions 1 Identify the set of IP addresses to route over the SNA network 2 Tell the system how to convert the IP address to the SNA format
104. s Planning and Installation Guide SC33 0650 To configure the AS 400 to a 4684 controller for an example of an AS 400 e Use the following table to connect to a 4690 retail controller AS 400 RIPSS Configuration AS 400 Prompt Parameter Display RIPSS Prompt LAN remote ADPTADR TRDLC Server Data Local node Hex adapter address For Token Ring connections the values specified for the RIPSS configuration and for the AS 400 CRTCTLRTL command must match Local adapter ADPTADR TRDLC Server Data Remote node Hex address For Token Ring connections the values specified for the RIPSS configuration and for the AS 400 CRTLINTRN command must match Destination service DSAP TRDLC Server Data Local SAP Hex access point For Token Ring connections the values specified for the RIPSS configuration and for the AS 400 CRTCTLRTL command must match Duplex DUPLEX SDLC Server Data 4 wire constant RTS For SDLC connections the values specified for RIPSS and AS 400 configurations must match If the RIPSS response is N DUPLEX HALF must be specified for the CRTLINSDLC command e If the RIPSS response is Y DUPLEX YES must be specified for the CRTLINSDLC command 74 Version 5 AS 400 Prompt AS 400 Parameter RIPSS Configuration Display RIPSS Prompt Exchange identifier EXCHID SDLC Server Data Block number hex and XID hex For SDLC connections the values specified for
105. s the connection number specified on the CRTCTLRWS command and in question 424 must match Destination service access point DSAP 940 Ring Address Assignment The value specified for the DSAP parameter on the CRTCTLRWS command must match the SAP specified for the 3174 on the Ring Address Assignment display Used for token ring only Exchange identifier EXCHID 215 Physical Unit Identification For switched connections the 5 digit hexadecimal value specified for question 215 must match the last 5 digits of the exchange identifier specified on the CRTCTLRWS command Link type LINKTYPE 101 Host Attachment 3174 Values specified on the CRTCTLRWS command and for question 101 must match as follows LINKTYPE SDLC 101 2 e LINKTYPE X25 101 3 LINKTYPE LAN 101 7 token ring LINKTYPE LAN 101 8 Ethernet Modem data rate select MODEMRATE 318 Full or Half Speed Transmission The values specified for the MODEMRATE parameter on the CRTLINSDLC and CRTLINX25 commands must match question 318 as follows If MODEMRATE FULL 318 0 If MODEMRATE HALF 318 1 Chapter 7 Communicating with remote workstation controllers 59 3174 AS 400 AS 400 Configuration Prompt Parameter Questions Notes Local network NETADR 423 Host DTE Address HNAD address For X 25 SVCs the network address specified on the CRTLINX25 command and
106. s and large transfers are running on a communications line concurrently you may need to change configuration parameters You should be able to configure AS 400 communications to work with interactive and batch jobs To mix interactive and batch jobs on a wide area network WAN line consider the following to keep interactive performance acceptable e Use Advanced Peer to Peer Networking APPN transmission priority to prioritize the interactive user s transfer over that of the large transfer This is the preferred method to transfer batch and interactive jobs Chapter 3 Optimizing communications performance 13 e Change the request response unit size to a lower value for the large transfer This parameter setting optimizes response time at the expense of large transfer performance e Reduce the pacing values for the large transfer to slow it down which allows the interactive users more windows for getting on the line Note The overall central processing unit time increases for the large transfer For more information about AS 400 communications see the Performance considerations for AnyNet communications AnyNet communications is a good performance factor for you to consider It is more expensive to use than any of the OS 400 protocols because you spend twice as much to run two protocols To optimize AnyNet performance consider the following e For send and receive pairs the most efficient use of an interface is with its own p
107. s configuration parameters between local and remote AS 400 systems The parameters are described in the following table This table shows those prompts and parameters that must be coordinated when you specify controller descriptions for the local and remote AS 400 systems To configure a local AS 400 to a remote AS 400 g Ai for an example of connecting one AS 400 to another AS 400 system e Use the following table for the controller descriptions AS 400 Remote AS 400 AS 400 Prompt Parameter Parameter Notes local area network ADPTADR ADPTADR The adapter address specified on the local system LAN remote adapter controller description must match the line description address ADPTADR parameter specified by the remote system If the AS 400 system uses an Ethernet line through an 8209 LAN Bridge see Appendix C Local Area Network Addressing Considerations in the STE caer Connection number CNNNBR NETADR For X 25 switched virtual circuits SVCs the CNNNBR parameter on the local system controller description must match the NETADR parameter on the line description for the remote system Connection password CNNPWD CNNPWD For switched virtual circuits SVCs passwords specified for each system must match Destination service DSAP SSAP DSAP specified for the local AS 400 system must match access point the SSAP specified in the remote AS 400 controller description Chapter 6 Communicating with a
108. s destination address information and forwards the data directly to the receiving station The switch then establishes a dedicated connection between the two stations enabling data to be transmitted and received at the same time In full duplex token ring the token passing protocol is suspended The network in effect becomes a tokenless token ring Full duplex token ring increases sending and receiving bandwidth for connected stations improving network performance For more information see Token ring Wireless network The more mobile your employees the more you should consider a wireless network The portable transaction computers PTCs make it possible for direct connection between the office and offsite locations The AS 400 wireless network is a LAN that uses a Carrier Sense Multiple Access with Collision Avoidance CSMA CA protocol to provide media access to competing stations AS 400 wireless communications use spread spectrum direct sequence radio in the 2 4 gigahertz GHz band to provide connectivity between 92 Version 5 the AS 400 wireless LAN adapter and remote stations Remote stations can be PTCs that are running 5250 emulation or LAN connected systems that are equipped with compatible wireless adapters There are other implementations of wireless LAN Wide area network standards A wide area network WAN is a data communications network designed to serve an area of hundreds or thousands of miles for example pu
109. s not accessible Output queue is not accessible Maximum number of jobs defined by subsystem description are already active Maximum number of jobs defined by communications entry are already active Maximum number of jobs defined by routing entry are already active Library on library list is exclusively in use by another job Group profile cannot be accessed Insufficient storage in machine pool to start job System value not accessible QSERVER not started Job description was not found Output queue was not found Class was not found Library on initial library list was not found Job description or job description library is damaged Library on library list is destroyed Duplicate libraries were found on library list Storage pool defined size is zero Transaction program name value is reserved but not supported Matching routing entry was not found Program was not found Password is not valid User is not authorized to device User is not authorized to subsystem description User is not authorized to job description User is not authorized to output queue User is not authorized to program User is not authorized to class User is not authorized to library on library list User is not authorized to group profile User ID is not valid Default user profile is not valid Neither password nor user ID was provided and no default user profile was specified in the communications entry No user ID A user ID
110. s to the IOP passing the processing cost of processing frame to the IOP The following information can help you understand the protocol considerations for local area networks e A Data Link Control DLC can achieve a significantly higher data rate than other supported line types This is due to the desirable combination of having a high media speed along with large frame sizes e When several sessions use a line or LAN concurrently the aggregate data rate may be higher than when only one session is used e To achieve good performance in a multi user interactive LAN environment you should manage the number of active users so that LAN media use does not exceed 50 A 25 utilization is recommended for Ethernet environments because of media collisions that causes the program to loop Operating at higher utilization may decrease response time because of excess queueing time for the line In a large transfer environment in which a small number of users contend for the line a higher line use may still offer acceptable performance For more information about AS 400 configuration see the Adjusting LAN lines for optimum communications performance Several parameters in the line description LIND and the controller description CTLD play an important role in system performance that you can change The following information can help you to understand the line considerations for local area networks e MAXFRAME on the line description LIND and
111. se applications so that they do not time out while waiting for APPN functions to be performed APPN function is transparent to APPC programs using APPN take advantage of the following routing functions e Non adjacent nodes appear adjacent and so APPC programs may communicate directly to programs in non adjacent nodes without any APPC programs on the intermediate nodes e Performance is improved for APPC programs with session endpoints that are not physically adjacent in the network e APPC programs may communicate directly to programs in nodes in an adjacent APPN network through network nodes Distributed data management DDM DDM is a function of the operating system that allows an application program or user on one system to use database files stored on remote systems The systems must be connected by a communications network and the remote systems must also be using DDM DDM on the AS 400 allows application programs or users to e Access data files that reside on remote systems target systems The remote systems can also access data files on the local AS 400 system e An application can add change and delete data records in a file that exist on a target system e Create delete or rename files on a remote system e Copy a file from one system to another When DDM is in use neither the application program nor the program user needs to know if the file that is needed exists locally or on a remote system Remote and local fil
112. source Definition Reference SC30 3254 You can specify some host system parameters on multiple definition statements such as the GROUP LINE PU and LU The following table lists only the lowest level definition statement that is used by the host system AS 400 to a host system e Use the following table for the controller description parameter el for an example of connecting an AS 400 Prompt AS 400 Parameter Host Definition Statement Host Parameter Adjacent link station ADJLNKSTN PU name AS 400 adjacent link station name must match the name assigned to the PU macro instruction in the host system switched major node definition This match is required if AS 400 host controller description specifies RMTCPNAME ANY SWITCHED YES or SNBU YES and LINKTYPE is SDLC or IDLC This parameter should be specified only if the host system is running VTAM Version 4 Release 1 or later and NCP Version 6 Release 2 or later LAN remote adapter address ADPTADR LINE LOCADD Values specified for each system must match If LOCADD is specified ECLTYPE PHYSICAL must also be specified on the GROUP definition statement PORT MACADDR For 9370 LAN only the AS 400 controller description ADPTADR must match the host MACADDR parameter MACADDR can be coded as an 8 or 12 digit hexadecimal number the 8 digit variation assumes 4000 in the first four positions 4000xxxxxxxx Destination servic
113. t of NONE to 2 or more may improve performance In general setting the LANMAXOUT parameter value to CALC or 2 offers the best performance for interactive environments and adequate performance for larger transfer environments e For large transfer environments changing the LANMAXOUT value may significantly increase performance As starting points use the following guidelines When you are communicating with a recent model personal computer increase the LANMAXOUT parameter but keep the LANACKFRQ parameter set to CALC For older models of personal computers use CALC for both values to limit buffer overruns If LANACKFRQ and LANMAXOUT parameter values are changed without noticeable performance improvements change the values back to CALC For more information on AS 400 communications see the LAN line speed considerations for IOPs When configuring an AS 400 system with communications lines and local area networks LANs you should not overload an input output processor IOP to prevent possible system performance bottlenecks The following information can help you to understand the line speed considerations for IOPs e The integrated PC server performance is similar to the 2619 and the 2617 IOPs for host LAN functions For send and receive scenarios performance is equivalent For large transfers the 6506 IOP is slightly faster than the 2619 TRLAN IOP but slightly slower than the 2617 Ethernet IOP These differences are
114. tching AS 400 parameters for a 5494 connected by X 21 Matching AS 400 parameters for a 5494 connected by X 25 Matching AS 400 parameters for 3x74 controller f Matching AS 400 parameters for a 3174 controller Matching AS 400 parameters for a 3274 controller Matching AS 400 parameters for finance controllers Matching AS 400 parameters for 470x finance controllers Matching AS 400 parameters for FBSS finance controllers Matching AS 400 parameters for retail controllers A Matching AS 400 parameters for 3651 retail controllers Matching AS 400 parameters for 3684 retail controllers Matching AS 400 parameters for 4680 4690 LINE parameter Matching AS 400 parameters for 4680 4690 LINK parameter Matching AS 400 parameters for 4684 retail controllers Chapter 8 Troubleshooting communications problems Displaying message queues to solve communication problems Displaying the Product Activity Log to solve communication problems Displaying the Print Error Log to solve communication problems Job logs and communication problems Solving communication problems using communications trace i System service tools and communication problems Trace Common Programming Interface CPI Communications TRCCPIC command Solving communication problems using the system problem log Solving communication problems using status information Considerations for system tuning during error recovery Using error messages to aid in error recovery Solving communicat
115. the RIPSS configuration must match the value specified in the EXCHID parameter of the CRTCTLRTL command The EXCHID parameter must be specified as xxxyyyyy where xxx matches the RIPSS Block number and yyyyy matches the RIPSS XID For switched connections the block number must be 005 Local location address LOCADR SNA Server Data Session Data LOC Address Dec The values specified for the RIPSS configuration must match the values specified on the LOCADR parameter of the CRTDEVRTL command Note that the RIPSS LOC Address is a decimal value the AS 400 value is a 2 digit hexadecimal number NRZI data encoding NRZI SDLC Server Data Data coding decoding For SDLC connections the values specified for the AS 400 CRTLINSDLC command and the RIPSS configuration must match e If the RIPSS response is NRZI NRZI YES must be specified for the CRTLINSDLC command If the RIPSS response is NRZ NRZI NO must be specified for the CRTLINSDLC command SSCP identifier SSCPID HST Server Data SSCP Name For SDLC connections if used the value specified by the RIPSS configuration must match the last 10 digits of the SSCPID parameter specified on the CRTCTLRTL command Station address STNADR SDLC Server Data Poll address hex For SDLC connections values specified for the AS 400 CRTCTLRTL command and the RIPSS configuration must match Examples Connecting AS 400
116. the line descriptions AS 400 Remote AS 400 AS 400 Prompt Parameter Parameter Notes Local adapter address ADPTADR ADPTADR Adapter address of the local system specified on the line description must be matched at the remote system in the controller description ADPTADR parameter If the AS 400 system uses an Ethernet line through an 8209 LAN Bridge see Appendix C Local Area Network Addressing Considerations in the Communications Configurationbook Insert network ADRINSERT ADRINSERT If X 25 DCE support is specified X25DCE YES or address in packets X25DCE NEG ADRINSERT YES should be specified for both systems Data bits per BITSCHAR BITSCHAR Values specified for each system must match character Copyright IBM Corp 1998 2001 33 AS 400 Prompt AS 400 Parameter Remote AS 400 Parameter Notes Connection initiation CNNINIT CNNINIT If X 25 DCE support is specified X25DCE YES for either system CNNINIT LOCAL should also be specified on that system s line description The other system with X25DCE NO specified should specify CNNINIT REMOTE or CNNINIT WAIT For switched connections both systems can also specify X25DCE NEG to negotiate the Distributed Computing Environment DCE and data terminal equipment DTE roles and CNNINIT CALLER to allow either system to initiate the connection by making the call See the X25DCE parameter for additional considerat
117. ting Specifies whether the collection of trace information is to be started stopped or ended ON Starts Trace CPI Communications This is the default value for the command OFF Stops Trace CPI Communications The current information is written to the spooled printer file or to the database file and the trace table The trace information is then deleted END Ends Trace CPI Communications The trace table and all trace information are destroyed Maximum storage to use Specifies the maximum amount of storage to use for the trace information collected The prompt appears only if you have selected ON for the Trace option setting prompt 200 K The number of bytes 1 K equals 1024 bytes of storage This is the default value 82 Version 5 1 16000 K The valid range for the maximum number of bytes used for storing collected trace information Trace full Specifies whether new trace records replace old trace records or whether the trace is stopped when the maximum storage that you specified has been reached This prompt appears only if you have selected ON for the Trace option setting prompt WRAP When the trace storage area is full new trace information is written over the old trace information starting at the beginning of the storage area This is the default value STOPTRC No new trace information is saved when the trace storage area is full You must reissue the TRCCPIC command specifying OFF for the SET parameter to retriev
118. tions and sequence numbers to configure the 3274 controller These parameters are described in the following table For more information about configuring the 3274 controller see the 3274 Control Unit Planning Setup and Customizing Guide To configure the AS 400 to a 3274 controller an AS 400 to a 3174 retail controller e Use the following table to connect an AS 400 to a 3274 controller 60 Version 5 for an example of connecting 3274 AS 400 AS 400 Sequence Prompt Parameter Number Notes Connection CNNNBR 411 3274 DTE Address number For X 25 SVCs the connection number specified on the CRTCTLRWS command and in sequence number 411 must match Exchange EXCHID 215 Physical Unit Identification identifier For switched connections the 5 digit hexadecimal value specified for sequence number 215 must match the last 5 digits of the exchange identifier specified on the CRTCTLRWS command X 25 link LINKPCL 403 Logical Link Control protocol For X 25 connections values specified must match Specify LINKPCL QLLC on the CRTCTLRWS command specify 1 QLLC for sequence number 403 Link type LINKTYPE 331 BSC SDLC X 25 Protocol Values specified on the CRTCTLRWS command and in sequence number 331 must match as follows If LINKTYPE SDLC 331 1 If LINKTYPE X25 331 2 Local network NETADR 410 Host DTE Address HNAD address For X 25 SVCs the network address specified on the CRTLINX
119. to a 4690 retail controller AS 400 retail communications provide the ability to attach retail controllers to the AS 400 system Retail communications manage data with the intersystem communications function ICF file For communications to begin between programs the retail communications device must first be configured and varied on Example 1 AS 400 to 4690 LUO connection over token ring network Chapter 7 Communicating with remote workstation controllers 75 Token Ring Line Description TRNLINE Retail Controller Description R4690CC 4690 R4690CC XID O Links Supported Remote Node Address Example 2 AS 400 to 4690 PEER connection over token ring network 76 Version 5 RT 4 Token Ring Line Description TRNLINE APPG Controller Description R4690CC APPG Devcs Description R4690HCP Meds Description MODETRN Communi cations Side Information R4690CC AS 400 RCHASXXX R4590G G RCHASORX NO 00 MODETRN MODETRN adxtest RMTLOGNAM MODE TNSPGM 4690 R4690CC Local Node Address Remote Node Address Partner SNA Node Type Symbolic estination RGHASKXX Local LU Name R46906 C Partner LU Name RGHASXXX MODE Remotely Attachabl Local TP Name Min Contention LOSE Remotely Attachabe Local TP Name Executable Fib Name MODETRN ADXTEST Line Definition ADXTOKEN Link Definition RCHASXXX Symbolic Destination RCHASXXX PPN R4ag0cc Local U LocalL
120. transfer into that subsystem e For each subsystem you have defined you need to identify which users will run in which subsystems Use the Add Work Station Entry ADDWSE command and the Remove Work Station Entry RMVWSE command You can set up work stations entries that identify which devices that subsystem should allocate as well as which devices a subsystem should not allocate Note You can use the ADDWSE commands while the subsystem is active However subsystems do not reallocate device locks dynamically Eventually it may be necessary to end and restart the subsystems to have the device locks allocated to the desired subsystem To specify the devices a communications subsystem should allocate ADDCMNE SBSD libname sbsname DEV devnamex MODE modename To specify the devices a communications subsystem should not allocate ADDCMNE SBSD libname sbsname DEV devnamex MODE modename MAXACT 0 Note Database and file servers run only in QSERVER Do not attempt to allocate sessions running over the QSERVER mode description You can do this by adding the following communication entry to your subsystem ADDCMNE SBSD libname sbsname DEV devnamex MODE QSERVER MAXACT 0 See the following lexamplel for a way of configuring your communications subsystem Chapter 3 Optimizing communications performance 11 Example Communications subsystem configuration 1 Create a duplicate of QCMN CRTDUPOBJ OBJ QCMN FROMLIB QSYS OBJTYPE SBSD TOL
121. ts those parameters The 4680 controller requires configuration of the SDLC SNA LINE parameter AS 400 parameters are listed in alphabetical order the commands on which the parameters are specified are included in the rightmost column of the table For more information about configuring the 4680 see the BM 4680 Store System Programming Guide To configure the AS 400 to a 4680 4690 controller for an example of an AS 400 e Use the following table to connect an AS 400 to a 4690 retail controller 72 Version 5 AS 400 Prompt AS 400 Parameter 4680 Line Parameter Connection type CNN 4680 CONNECTION TYPE parameter value must be coordinated with the values specified for the AS 400 CNN and SWTCNN parameters on the CRTLINSDLC command and with the SWITCHED and INLCNN parameters on the CRTCTLRTL command If CNN NONSWTPP and SWITCHED NO are specified for the AS 400 system specify CONNECTION TYPE 1 for the 4680 e If CNN MP and SWITCHED NO are specified for the AS 400 system specify CONNECTION TYPE 2 for the 4680 If CNN SWTPP SWITCHED YES INLCNN DIAL and either SWTCNN DIAL or SWTCNN BOTH are specified for the AS 400 system specify CONNECTION TYPE 3 for the 4680 If CNN SWTPP SWITCHED YES INLCNN DIAL and either SWTCNN DIAL or SWTCNN BOTH are specified for the AS 400 system specify CONNECTION TYPE 4 for the 4680 This configuration allows the 4680 to manually answe
122. u must match host system communications configuration parameters with AS 400 values A description of the AS 400 values are in the following table For information about configuring host systems see the manuals VTAM Installation and Resource Definition SC23 0111 and Network Control Program Resource Definition Reference SC30 3254 You can specify some host system parameters on multiple definition statements such as the GROUP LINE PU and LU The following table lists only the lowest level definition statement that is used by the host system To configure an AS 400 to a host system x Gl for an example of connecting an AS 400 to a host system e Use the following table for the mode and class of service description parameter 25 Chapter 5 Communicating with host systems AS 400 Prompt AS 400 Parameter Host Definition Statement Host Parameter Mode description name MODD MODEENT LOGMODE AS 400 mode description name specified on the AS 400 CRTMODD command MODD parameter must be defined in the host logon mode table using the LOGMODE parameter on the MODEENT macro instruction The mode name must also be included in the CICS VS terminal control table DFHTCT MODENAM parameter Class of service description name COSD MODEENT COS AS 400 class of service description name specified on the AS 400 Create Class of Service Description CRTCOSD command COSD parameter and CRTMODD command
123. ue e To manually connect the AS 400 to a 5494 you can use the following examples and the tables The list contains only those configuration prompts and parameters that require coordination on both AS 400 and the 5494 controller In addition some of the parameters that are listed may not apply to particular configuration For more information about configuring the 5494 see these books IBM 5494 Remote Control Unit Planning Guide GA27 3936 IBM 5494 Remote Control Unit User s Guide GA27 3852 Eene Wark Station Supaad Matching AS 400 parameters for a 5494 connected by token ring You must coordinate communications configuration parameters between AS 400 and the 5494 controller that is connected by koken ringl You can coordinate these values automatically or manually Pick one of these ways e To automatically connect the AS 400 to a 5494 controller you can use the automatic remote controller QAUTORMT system value e To manually connect the Asn to a 5494 example of connecting ASIA00 to a 5494 controller by token ring Use the following table to configure the AS 400 to a 5494 controller that is connected by token ring The following table gives a description of the parameters The related fields and subfields from the 5494 configuration display the AS 400 configuration value and the matching 5494 value to enter are shown For more information about configuring the 5494 see these books IBM 5494 Remote C
124. up Source service access SSAP DSAP SSAP specified for the local AS 400 system must match point the DSAP specified in the remote AS 400 controller description Station address STNADR STNADR Values specified for each system must match unless both controller descriptions specify ROLE NEG Note For asynchronous controllers CRTCTLASC command if the remote system controller description specifies RMTVFY YES the local system controller description must specify a local identifier LCLID parameter and local location name LCLLOCNAME parameter The remote system must also create a configuration list with the LCLID and LCLLOCNAME values from the local system controller description For more information on AS 400 parameters see the K Matching AS 400 device description parameters for a remote AS 400 system You must coordinate communications configuration parameters between local and remote AS 400 systems The parameters are described in the following table This table shows those prompts and parameters that must be coordinated when you specify device descriptions for the local and remote AS 400 systems To configure a local AS 400 to a remote AS 400 A for an example of connecting one AS 400 to another AS 400 system e Use the following table for the device description 36 Version 5 AS 400 Prompt AS 400 Parameter Remote AS 400 Parameter Notes LCLLOCNAME RMTLOCNAME For systems not usin
125. uration parameters must be coordinated when you connect an AS 400 system to a 5494 controller Chapter 7 Communicating with remote workstation controllers 47 The following diagram shows the AS 400 parameters and 5494 parameters that need to match when you use frame relay Network Attributes NWS Config Screen 2 Network Information LGLLOGNAME SYSNAME H1 3 NETID 5494 network name LGLNETID NETID 12 FR5494CP 5494 LU name 13 FR5494CP 5494 GP name H1 4 ORMTWSG Mods name H1 1 SYSNAME AS 4OO LU name Hi 2 NETID AS4OO network name Network Interface Description H1 6 008 DLGI NWID BOSTON H1 704 ASV400 SAP ae eee NWS Config Screen 1 AS1400 Connection AA 86 Frame Relay Line Description F 04 5494 SAP CRTLINFR LIND FRLINOS Ni BOSTON 3 0110000 Communications parameters NWIDGLI 4 L RZI AUTOGRTCTL YES APPC Controller Description GTLD FRS494 LINKTYPE FR LINE FRLINOS RMTNETID NETATR RMTGPNAME FRS494GP DSAP Od SSAP Od RWS Controler Description GTLD FRS494AWS wu TYPE 5494 MODEL 2 LINKTYPE NONE LGLLOGNAME NETATR PWS using DOS PC Support 400 GONFIG PGS SFLR 1 1 SYSNAME RTLN NETID PS2 RTYP 5250 EMLI SYSNAME 1 6 1 Ll Mode i RMTLOCNAME FR5494CP RMTNETID NETATR NWS Disphy Devices Description DEVD DISP3196 DISP3196 CTL FR5494RWS Fort 1 LOCADA OB Address 4 FRAME RELAY NETWORK
126. ust match Station STNADR 2 Values specified in the AS 400 address controller description and for the 5494 Remote Control Unit must match This value must also be specified as the last 2 digits of the AS 400 EXCHID parameter Example Connecting AS 400 to a 5494 controller connected by SDLC Configuration parameters must be coordinated when you connect an AS 400 system to a 5494 controller The following diagram shows the AS 400 parameters and 5494 parameters that need to match when you use SDLC 50 Version 5 AS 400 System 5494 Controller Network Attributes DWS Configuration Screen 2 Network Information LCLLOCNAME S45P 11 MYNET Default local network name LCLNETID MYNET 12 N 5494 _______ 5494 LU name 13 NY5494 5494 CP name 14 QRMTYSC 5494 default mode name H1 1 45 _ A 400 LU name H1 2 MYNET AS 400 network name DWS Configuration Screen 1 AS 400 connection AA 0 SBL DD 1 _Token ring gateway 2 5494 station address Line Description CRTLINSDLC LIND NYLINE CHH HONSWTPP DUPLEX FULL 3 0110000 Communications parameters Point point Duplex Nonswitched line APPC Controller Description CTLD NYAPPC LINKTYPE DLC LINE NYLINE RMTNETID NETATR FMTCPNAME NY5494 EXCHID 07300001
127. ve to application efficiency With synchronous data link control SDLC the communications controller CPU usage increases because of polling Additional considerations for adjusting the wide area network line speed are the following e A common misconception about the line speed of each attached communications line is that central processing unit CPU resource is used in a uniform fashion Exact statements cannot be made about the number of lines that any given AS 400 model can support e Most communications applications use a lot of CPU resource to process data to support disk input and output and communications line resource to send and receive data or display I O The amount of line resource that is used is proportional to the total number of bytes that are sent or received on the line Some additional CPU resource is used to process the communications software to support the individual sends puts or writes and receives gets or reads Communications input output processor resource is also used to support the line activity e When a single job is running disk operations or doing non overlapped CPU processing the communications link is idle If several sessions transfer concurrently then the jobs are more interleaved and make better use of the communications link e Polling is an important consideration for synchronous data link control SDLC environments All SDLC polling is handled by the communications controller and is governed b
128. ves large transfer performance in terms of capacity for the communications IOP and in terms of system response time The amount of time that the IOP spends 8 Version 5 processing a larger frame is only slightly more than the amount needed to process a smaller frame If you use larger frames to transfer a single system message or block of data decreases the total number of frames required to complete the transfer e The values for IOP use in synchronous data link control SDLC environments do not necessarily increase consistently with the number of work stations or with the workload An IOP can spend more time polling when the application is not using the line It is possible to see a relatively high IOP use at low throughput levels e For information on AS 400 configuration see the Commun e For more information on performance tools see the Performance Tools for AS A0d book Improving local area network performance To achieve better performance with your AS 400 when communicating in a local area network LAN you need to consider the following Adjusting LANs for optimum communications performance Local area networks LAN affect the communications performance on AS 400 Improvements to LAN input output IOPs in the areas of increased central processing unit CPU time IOP capacity and support of IOP assist make them more efficient This efficiency allows advanced program to program communications APPC to send request unit
129. was received but a password was not sent No password was associated with the user ID User ID does not follow naming convention User profile is disabled Password has expired Program initialization parameters are present but not allowed Program initialization parameter exceeds 2000 bytes Subsystem is ending Prestart job is inactive or is ending WAIT NO was specified on the prestart job entry and no prestart job was available The maximum number of prestart jobs that can be active on a prestart job entry was exceeded Prestart job ended when a program start request was being received Chapter 8 Troubleshooting communications problems 85 Table 1 Reason Codes for Rejected Program Start Requests continued Reason Code 901 902 903 1001 1002 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 2501 2502 2503 Reason Description Program initialization parameters are not valid Number of parameters for program not valid Program initialization parameters required but not present System logic error Function check or unexpected return code encountered System logic error Function check or unexpected return code encountered while receiving program initialization parameters Character in procedure name not valid Procedure not found System 36 environment library not found Library QSSP not found File QS36PRC not found in library QSSP
130. will probably match LCLNETID in the network attributes and H1 2 Remote RMTLOCNAME 12 Values specified for the AS 400 location CRTCTLRWS command and name for the 5494 Remote Control Unit must match 52 Version 5 5494 AS 400 AS 400 Prompt Parameter Field Subfield AS 400 Value 5494 Value Notes Link type LINKTYPE AA X21 4 5494 configuration values must match the values specified for the LINKTYPE parameter on the CRTCTLAPPC command Select 2 for X 21 network connections Station STNADR 2 Values specified in the AS 400 address controller description and for the 5494 Remote Control Unit must match This value must also be specified as the last 2 digits of the AS 400 EXCHID parameter Example Connecting AS 400 to a 5494 controller connected by X 21 Configuration parameters must be coordinated when you connect an AS 400 system to a 5494 controller The following diagram shows the AS 400 parameters and 5494 parameters that need to match when you use X 21 Chapter 7 Communicating with remote workstation controllers 53 Network Attributes NWS Config Screen 2 Network Information LGLLOGNAME SYSNAME 12 X21CP 5494 LU name LGLNETID NETID 13 X21GP 5494 GP name 15 222222 495 Connection number Hi 1 SYSNAME AS 400 LU name H1 2 NETID AS 4OO network name H1 3 NETID 5494
131. with remote workstation controllers 57 Matching AS 400 parameters for 3x74 controller You must match the AS 400 configuration parameters with some configuration questions and sequence numbers when you configure the 3174 and 3274 controllers Matching AS 400 parameters for a 3174 controller You must match the AS 400 configuration parameters with the configuration questions and sequence numbers to configure the 3174 controller These parameters are described in the following table For more information about configuring the 3174 controllers see these books e 3174 Subsystem Control Unit Customizing Guide 3174 Establishment Controller Supplemental Customer Information for Configuration Support C Release 4 Ethernet Attachment GA27 3994 has information about Ethernet support To configure the AS 400 to a 3174 controller O for an example of connecting an AS 400 to a 3174 retail Sontraller e Use the following table to connect an AS 400 to a 3174 remote controller 3174 AS 400 AS 400 Configuration Prompt Parameter Questions Notes LAN remote ADPTADR 084 106 Ethernet Address adapter address If the AS 400 system uses an Ethernet line to connect to the 3174 controller use table C 3 on page C 4 in Appendix C Local Area Network Addressing Considerations of the gt book to convert the value specified for question 084 Specify the converted address for the ADPTADR parameter on the CRTCTLRWS or CRTCTLAPPC comm
132. work of systems to communicate using the frame relay network as a backbone without the need for multiple leased T1 lines e Bridged frame relay network Allows AS 400 to communicate over a frame relay network through a remote bridge The bridge is attached to a token ring Ethernet or distributed data interface DDI network Bridged frame relay connections allow AS 400 to communicate with stations on the remote local area network LAN as if they were attached locally to the LAN medium For more information see Erame relayl Integrated services digital network You can connect your AS 400 to an Integrated Services Digital Network ISDN for faster more accurate data transmission An ISDN is a public or private digital communications network that can support data fax image and otherservices over the same physical interface Also you can use other protocols on ISDN such as ISDN data link control IDLC PPP fax and X 25 ISDN provides benefits that are not found in more conventional types of communications These include the following e High speed low error rate communications e Switched high speed communications e Switched digital networking e Advanced networking functions e Integration of voice and data transmissions e Integrated support of packet switching X 31 For more information on ISDN see the topics ISDN on AS 400 and ISDN data link control network ISDN data link control network You can use ISDN data link contr
133. works that are supported by the AS 400 system ATM on AS 400 Asynchronous Transfer Mode ATM provides a very fast and flexible network protocol When used with LAN emulation you can run token ring and Ethernet on ATM to take advantage of ATM s superior speed throughput and flexibility ATM LAN emulation connects LAN clients at multi megabit per second speeds over distances previously possible only with a wide area network WAN LAN emulation makes client connections as they are needed without configuring the physical path between the end systems Switching is the mechanism by which the network completes connections from one device to another The AS 400 asynchronous transfer mode ATM network interface NWI describes everything that is common across the ATM physical interface Each AS 400 ATM input output adapter 2809 or 2810 may have one network interface attached A single line description attaches to the NWI The line description can define either an Ethernet or token ring local area network LAN emulation client by using switched virtual circuit connections permanent virtual circuit connections or direct connections For more information on ATM see the topic ATM on AS 4001 Distributed data interface network FDDI is an optical fiber based local area network LAN that uses the American National Standards Institute ANSI 3T9 5 standard for a token passing ring media access control MAC protocol Stations concentrators a
134. y parameters in both the line and controller descriptions e For information about AS 400 configuration see the K e For more information about performance tools see the Performance Tools for AS 400 book WAN line speed considerations for IOPs When configuring a communications controller you should consider both subsystem storage and aggregate line speed Subsystem storage is the amount of storage available on the communications controller Aggregate line speed is the sum of individual lines speeds that are attached to the communications controller The following information can help you understand network line speed considerations for input output processors IOPs e For interactive environments you should not exceed 60 use on the communications IOP Exceeding this threshold in a large transfer environment or with a small number of concurrent users may still offer acceptable performance Use the AS 400 performance tools to get the utilization e You can attach multiple IOPs to an AS 400 system The maximum number of IOPs that can be attached is determined by the AS 400 model It is important to distribute the work load across several IOPs if the performance capabilities of a single IOP is exceeded e Even though an IOP can support certain configurations a given AS 400 model may not have enough system resource for example CPU processing capacity to support the work load over the lines The use of larger frames generally impro

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