SNA Communication Questions

[ Table of Contents ]

    1. What are the SNA definition in the M/F and the OnePrint SE needed in order configure the OnePrint SE as an SNA attached printer ?
      1. OnePrint SE - OnePrint SE identifies itself as a PU type 2.0 in the SNA network, it can be connected in four ways (Please refer to the OnePrint SE user manual for more details and examples)
        1. OnePrint SE as a DSPU via a 3174 or compatible local controller channel attached connection. 
          1. The parameters relevant for the PU communication are: 
          2. GATEWAY Address and SAP - 3174 LAN address (configuration questions: question 900 include the gateway address and the SAP). 
          3. OnePrint SE Address and SAP - 3174 LAN address (configuration questions: question 940 include the DSPU address and the SAP The "T" should be set to "1"). 
          4. MaxData size is the maximum frame size that the 3174 will send on the token ring. Set it to the highest size that the OnePrint SE can accept - 4105, that means question 941 F = 4. In the OnePrint SE MaxData must also be set to 4105. 
          5. Transmit window size is the 3174 number of transmissions before waiting to receive acknowledgment. In 3174 question 941 W = 7. In the OnePrint SE the received window size should be set to 1 and the transmission to 7. 
          6. In the application logmode, the RUSIZE recommended to be set to the maximum available, The maximum available in this version is 4A4A that means 4 * 2^10 =4096. 
        2. OnePrint SE as a DSPU via a 3174 or compatible controller remote connection ( ICA or SDLC). 
          1. In addition to the parameters in section one, the VTAM recommended definition should also include: MAXOUT=7 , MAXDATA=4096. 
        3. OnePrint SE as a DSPU via a FEP or direct connection to the host. 
          1. VTAM definition for IDBLK and IDNUM should be configured in the OnePrint SE. 
          2. FEP LAN address should be configured in the OnePrint SE. 
          3. VTAM definition should include MAXDATA=4096 and MAXOUT=7. 
          4. In the application logmode, the RUSIZE recommended to be set to the maximum available, The maximum available in this version is 4A4A that means 4 * 2^10 =4096. 
        4. OnePrint SE as a concentrator PU via another PU (OS/2 Communication Manager, NetWare for SAA or compatible). 
          1. This kind of connection is made as a PU 2.1 between the host and the gateway, from the gateway there is a pool of LU's that are redirected to a DSPU (PU 2.0) : the OnePrint SE. 
          2. OnePrint SE important parameters are: gateway LAN address, SAP, I-Frame = 4096 ( recommended ). 
    2. What are the IBM printers emulated by OnePrint SE ? 
      1. The OnePrint SE can emulate two types of printers which cabe attached as SNA or IP, it should be noted that most of the IBM printers act the same as one of the following printers: 
        1. Dot Matrix printers 
          1. 4224. 
          2. 4230. 
        2. Page printers 
          1. 381X - Use 240 DPI font's. 
          2. 4028 - Use 300 DPI font's. 
    3. What is the best page printer emulation I should select and why ? 
      1. The 4028 emulation is the best emulation to select for speed and print quality. The 4028 printer is using 300 DPI fonts which does not require any font or image scaling by the OnePrint SE in order to print on a 300 DPI LAN printer. Since it uses 300 DPI fonts, the 4028 emulation gives a better quality printout. 
    4. How do I customize a 3174 to be the upstream gateway for the OnePrint SE ? 
      1. In order to customize the 3174 you have to IML (RESET) the control unit.. It is recommend to ask the people responsible to configure and customize the 3174 to help in this procedure prior to the installation of OnePrint SE. The customization stages are as follows: 
        1. How to Display the Master Menu 
          1. If the 3174 controller is already turned on, have the host operator take the controller off-line. If the 3174 is not turned on, turn it on. 
          2. Insert the Utility diskette into the diskette drive. 
          3. Press and hold the ALT 1 push-button on the Control Unit's (CU) operator panel. 
          4. While holding the ALT 1 push-button, press and release the IML push-button. 
          5. When you see 31 in the status indicators, release the ALT 1 push-button. 
          6. Now 40 appears in the status indicators, Use the keypad on the controller operator's panel to key in one of the following: 
          7. 0140 if you are IMLing from Diskette Drive 1 
          8. 0240 if you are IMLing from Diskette Drive 2 
          9. 0340 if you are IMLing from Fixed Disk 3 
          10. 0440 if you are IMLing from Fixed Disk 4 
          11. Press and release the Enter push-button on the operator panel. After approximately 30 seconds, 700 appears on the operator panel and the Master Menu appears on the customizing display station screen. 
        2. From the Master Menu press 1 to get the "Customize Control Disk Menu". Select the configuration option by typing 1. 
        3. Press PF8 until you see the question 900 which is the 3174 MAC address and SAP. This address have to be configured in the OnePrint SE as the gateway address. question 911 is the Ring Speed (0 = 4Mbyte, 1 = 16Mbyte normal, 2 = 16Mbyte early release). 
        4. Press PF8 to advance to the next panel : question 940 :Ring Address Assignment: 
          1. S - Addresses of Token-Ring DSPU within the range of addresses defined in questions 104 and 105 . 
          2. Ring - Token - Ring Network addresses of the DSPU. 
          3. SAP - Service Access Point (SAP) ID. 
          4. T - Type of device (0 = workstation, 1 = 3174, 2 = 8KB RU devices) 
        5. OnePrint SE - Add a new line, assign a Token-Ring DSPU address within the range of addresses defined in questions 104 and 105, set the OnePrint SE MAC address and the SAP, set the T parameter as 1 (3174 controller) . 
        6. Press PF8 to advance to the next panel : question 941 :Ring Transmission Definition: 
          1. S - Addresses of Token-Ring DSPU within the range of addresses defined in questions 104 and 105 . 
          2. Ring - Token - Ring Network addresses of the DSPU. 
          3. SAP - Service Access Point (SAP) ID. 
          4. F - Transmit I-frame size.(0 = 265, 1 = 521, 2 = 1033, 3 = 2042, 4 = 4105, 5 = 8201). 
          5. W - Maximum - Out (transmit window size) - the number of SDLC packets transmitted before waiting to receive an acknowledgment, a valid response ranges from 1 to 7. 
        7. OnePrint SE - Modify the OnePrint SE line and configure the F to be the same as the frame size in the OnePrint SE (4105 is recommended), set the W parameter to be 7. 
        8. To complete customizing the control disk press PF12, when the Master Menu appears, update is complete. 
    5. How do I configure a FEP to be the upstream gateway for the OnePrint SE ? 
      1. The FEP identify a downstream PU according to an XID identification combined with a SAP, The following VTAM parameters must be set up to establish a direct Token Ring connection. 
        1. IDBLK IDNUM - XID - Identification to VTAM. 
        2. MAXDATA - Maximum Frame Size - Specifies the maximum number of bytes that the physical unit can receive in a single data transfer, For best performance we recommend 4105. 
        3. MAXOUT - Receive Window Size - Window size is the number of I-frames transmitted or received before acknowledgment. 
        4. Never set the MAXOUT value to less than the Receive Window Size value. 
    6. How do I configure an OS/2 CM/2 (or compatible) to be the upstream gateway for the OnePrint SE ? 
      1. OnePrint SE configured as a concentrator (downstream) PU via another (upstream) PU (OS/2 Communication Manager, NetWare for SAA or compatible). This kind of connection is made as a PU 2.1 between the host and the upstream gateway. From the gateway there is a pool of LU's that are redirect to the OnePrint SE (DSPU) . In order to defined a new concentrator PU do the following (for OS/2): 
        1. Load the CM/2 setup utility, press the change option. 
        2. Press the "SNA Gateway Profiles". 
        3. Add Profile from the type "Hosts and LU pools". 
        4. Select "Configure", Press the "Link" to configure the LU's pool. 
        5. Configure the "Hosts and LU pools". 
        6. Defined in the "Host LU Pool Definition" the Host NAU Address Range, and the OnePrint SE parameters: gateway LAN address, SAP, I-Frame = 4096 ( recommended ). 
        7. Save it and reset. 
    7. How do I configure a 3172 to be the upstream gateway for the OnePrint SE ? 
      1. 3172 can be configured to be the upstream gateway for PU2.0 (OnePrint SE) in the following way: 
        1. The following is an example for VTAM listing: 
          1. OnePrint SE PU ADDR=01 
          • IDBLK=111, 
            1. IDNUM=00001, 
            2. ISTATUS=ACTIVE, 
            3. MAXDATA=4105, 
            4. MAXOUT=7, 
            5. PUTYPE=2, 
            6. SSCPFM=USSSCS, 
            7. USSTAB=TONESNA, USSTAB 
            8. MAXPATH=4, 
            9. DLOGMOD=SCS, 
            10. PACING=1, 
            11. VPACING=0 
            12. LUA1001 LU LOCADDR=2,ISTATUS=ACTIVE 
            13. LUA1002 LU LOCADDR=3,ISTATUS=ACTIVE 
            14. LUA1033 LU LOCADDR=4,ISTATUS=ACTIVE 
            15. LUA1034 LU LOCADDR=5,ISTATUS=ACTIVE 
        2. In the 3172 configure the "LAN Gateway Function" to direct the Sub channel address in the example 01 to the require LAN adapter 
    8. What is the BIND command appearing in the OnePrint SE's history file "Ready for printing. BIND type is - 1" ? 
      1. This message is an indication for a BIND command arriving from the HOST. The BIND command is a command send from the M/F to each LU port before printing. In most cases this command is implement by the HOST application, The BIND command include the following important information: 
        1. LU type - LU type 1: IPDS / SCS or LU type 3 : DSC. (any other type is not acceptable by the OnePrint SE). 
        2. RU size - the actual frame size sent by the application to the OnePrint SE LU, if it is two small it will decrease the performance. 
    9. What is "-WARNING!- [M082] Host communication status : 505" ?. what does it mean ? 
      1. This message is an indication that there is no connection to the HOST. The status 505 can be generated as a result from the following causes: 
        1. The hardware connection to the M/F is faulty (wires, hubs, failed NIC's, etc.). 
        2. No ACTPU command is send from the M/F. 
        3. The SNA stack of the OnePrint SE did not load. 
        4. The gateway address or the XID is wrong in the OnePrint SE configuration. 
        5. For connections via 3174 or compatible, the OnePrint SE address should be defined in the gateway, if it is wrong the 505 message will also appear in the history file. 
    10. I Installed the OnePrint SE and the message in the history log file is 505 and 510 intermittently, what is the problem ? 
      1. This phenomena can happen from the following causes: 
        1. The frame size definition in the gateway does not match the one in the gateway. 
        2. The router or bridge between the OnePrint SE and the gateway are not compatible with the configured frame size. 
        3. The router or bridge between the OnePrint SE and the M/F gateway are having a communication problems. 
    11. I Installed the OnePrint SE and got a 510 message in the history log file, but can not send a printout, there is no BIND command, what is the problem ? 
      1. This phenomena can happen from the following caus: 
        1. The LU type defined is a wrong LU type (not Type 1 or Type 3), Common mistake is to defined the LU as a terminal type LU - type 2. 
        2. There is no printing application associate and configured to print using the
          OnePrint SE LU. 

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