I-Data ReRouter instruction manual Keep Alive Function, Support for KeepAlive to OS/2

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Installation and Setup ida ReRouter

4.3 Keep Alive Function

The KEEPALIVE feature is a monitor function to check the conneciton between the transaction program (i.e. the ida ReRouter program) and the printer. The monitoring of the conneciton is done at defined intervals.

4.3.1 Support for KeepAlive to OS/2

The TCP/IP components for OS/2 offer network attachment for printers. However, these TCPIP components do not always detect connection failures if a point-to-point session between the OS2 machine and the device has failed (e.g. in connection with a printer being abruptly powered off). This may result in serious problems if the printers comprise IPDS printers in sessions with PSF/2 or PSF/6000.

Now, support for the TCP KEEPALIVE facility has been added to the TCP/IP components for OS/2 to detect all communcation failures. The PSF/6000 or PSF/2 direct TCP to send a KEEPALIVE transmission on a TCP connection remaining inactive for an extended period. If the KEEPALIVE transmission is not acknowledged, the TCP assumes that the connection partner has been lost and subsequently reports a failure to the PSF/6000 or PSF/2.

The frequency of these transmissions depends upon the configuration of the TCP/IP in the OS/2 environments. On OS/2, the default values are two hours or more. Both platforms, however, allow the frequency of KEEPALIVE transmissions to be adjusted. These values apply to all TCP applications that request KEEPALIVE transmissions.

In the following, you are provided with instructions for using the KEEPALIVE support facility added to the TCP/IP components for OS/2.

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Contents Data Electronic Documentation Main Office Preface JanuaryRelated Manuals Token Ring EthernetTable of Contents Table of Contents Ida ReRouter What is the ida ReRouter? IntroductionIda ReRouter in a Token Ring environment IdaRCtrl Product FeaturesWith connections to PCL 4/5 printers Items Supplied with ida ReRouter Quick Guide D10276Host System Requirements Product RequirementsPersonal Computer Requirements Installation of ida ReRouter Type a setupInstallation and Setup ida ReRouter Setup of ida ReRouter Status Route nameDescription Delete NewChange VerifyView Log DeActivate RouteRefresh Product InformationDefining a new route Enter DescriptionEnter Connect Timeout Communications ManagerValidation must be made in the configuration program Changing a route Additional routesDeleting a route Keep Alive Function Support for KeepAlive to OS/22 TCP/IP KeepAlive configuration on OS/2 Configuration Examples for MVS and VM Configuration of S/370 Networks1 PSF/MVS printer definition and startup procedure LUNAME=IDSNCEP0 2 PSF/VM PDM definition Disintv3 PSS/MVS printer definition and startup procedure PSS44 PSS/VM PDM definition Fssuser = PSS1 Userid OFF Virtual Machine Printing PSS printer profile using SNA and TCP/IP attachment Host Vtam definition PSFAPP11Mode Table Local Remote Creating Appc device description Configuration of AS/400 NetworksPrompts Parameter and values Parentheses Value must be unique within Creating Printer Device DescriptionNetwork Remote Location Name RER1 Updating Appn Remote Location ListSNA connections only Remote Network Identifier DKIDTN01Local Location Name S4450327 Remote Control Point NameControl Point Network Identifier Sample Controller Definition QlusCommunications Manager/2 for S/370-390 and AS/400 Workstation ConfigurationFor SNA connection Select Configure Changing configuration fileCommunications Manager Setup Configuring Data Link Control DLC profilesConfiguring SNA connection Configuring SNA local node characteristicsSet Node type For S/370 host connection For AS/400 host connection3a. Select Activate at startup Configuring SNA featuresPeer node connection normally AS/400 Connections ListLU Alias must be the same as defined SNA Features / Partner LU Select Partner LUsCreating a local LU Ida ReRouterCreating a transaction program definition AS/400 onlyFor Ipds connection to PSF/370-390 and PSF/400 Additional TP Parameters SNA Features ListFor Icds connection to ida PSS Communications Manager Profile List SheetCommunications Manager Configuration Def 2 S/370 Network Configuration Worksheet First device ida 913-03 Token RingSecond device ida PS 3 AS/400 Network Configuration Worksheet First device ida 913-03 Token Ring PartAPPCDev Printer Dev Configuration List Second device ida PS Part Partner LU Profile Explanation to Configuration Worksheets AS/400 Node ID370 S/390 TP nameLocal LU alias Local LU nameLocal LU address This parameter is for S/370 S/390 only This parameter is for AS/400 onlyLaps TCP/IPRouting Ping Function Testing Connection to Remote DevicePing Ping function succeeded Ping function failedLog Files Error Syntax Problem DeterminationAction ROUT0105E Appc communication error ROUT0035E Cannot open configuration fileROUT0052E Configuration error for entry ROUT0106E Appc allocation errorROUT0603E TCP/IP socket error ROUT0111E Appc error opcode ... Primary rc Secondary rcROUT0602E Invalid connect timeout value ROUT0110E Invalid Appc opcodeProblem Determination ida ReRouter ROUT0612W Swiddef file error ROUT0611I Trace enabledROUT0613I Printer is not ready IRQ on remote printer ROUT0801E Named Pipe handling error ROUT0700E Internal software errorROUT0800E Semaphore handling error ROUT0802E Timer handling errorROUT0803E Thread handling error TraceList of Abbreviations PPD/PPRAppendix a Keyword Definitions SyntaxRoutename Keywordipaddress Appendix BFill-InConfigurationWorksheet WORK-STATION PSF Vtam NCP IDA Fill-In Configuration Worksheet for AS/400 Communications Appendix C i-data Products Mainframe environmentMidrange environment Readers Comments