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Conference 7.286::fddi

Title:FDDI - The Next Generation
Moderator:NETCAD::STEFANI
Created:Thu Apr 27 1989
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2259
Total number of notes:8590

1647.0. "FFDT 'FDDI Full-Duplex Technology' enabled?" by CSC32::J_SOBECKI (John Sobecki, DTN 592-4101, CXO3-2/D2) Thu Apr 06 1995 15:37

    Hello,
    
    In a DEFPA to DEFTA point-to-point FDDI connection, is there any way
    (software, SDA, etc.) to tell that the adapters are running in FFDT
    mode, ala with 'FDDI Full-Duplex Technology' enabled?
    
    I reviewed the SDA SHOW LAN/FULL info, is this displayed with the device
    status/char/flags information?
    
    It's OpenVMS on a AXP 2100 (DEFPA) to a AXP 3500 (DEFTA).
    
    Thanks,
    John Sobecki
    CSC/Colorado
T.RTitleUserPersonal
Name		DateLines
1647.1NPSS::MDLYONSMichael D. Lyons DTN 226-6943Thu Apr 06 1995 16:171
       ...see 1637.3
1647.2enabling FFDT?CSC32::J_SOBECKIJohn Sobecki, DTN 592-4101, CXO3-2/D2Fri Apr 07 1995 18:0621
    
    Hello,
    
    Thanks for the pointer to the SDA information, now that I have the
    output that does not show FDX enabled, what can I check next?
    
    It's a point-to-point SC-cabled connected DEFTA to a DEFPA, VMS V6.1.
    
    LSB address  = 80B1AF00
    Device state = 00001003 RUN,INITED,RING_AVAIL
    
                      -- FWB Unit Summary  6-APR-1995 16:02:13 --
    
    UCB      UCB Addr  Fmt   Value           Client     State
    ---      --------  ---   -----           ------  -----------
    FWB0     80B1AC00
    FWB1     80B26A80  Eth   60-07           SCA     0017 STRTN,LEN,UNIQ,STRTD
    

    Thanks,
    John
1647.3NPSS::MDLYONSMichael D. Lyons DTN 226-6943Mon Apr 10 1995 11:281
    ...see 1468.1 - you may need to turn it on...
1647.4SET DEVICE/FULL_DUPLEX in LANCP?CSC32::J_SOBECKIJohn Sobecki, DTN 592-4101, CXO3-2/D2Thu Apr 20 1995 17:5229
    Hello,
    
    I noticed in the latest LANCP.EXE OpenVMS T6.2 kit, there is a SET
    DEVICE /FULL_DUPLEX command option, so I copied over the latest LANCP 
    image, and tried it:
    
    LANCP> set device/full_duplex fwa0
    %LANCP-W-FDXSUP, Full duplex not supported on this device, FWA0
    
    LANCP> show device/revision
    
    Device revision EWA0:  Not available
    
    Device revision FRA0:  322E3320
    
    Device revision FWA0:  322E3436
    
    Also failed on the DEFEA adapter:
    
    LANCP> set device/full_duplex fra0
    %LANCP-W-FDXSUP, Full duplex not supported on this device, FRA0
    
    Any insite into this problem?  Looks like the SYS$FWDRIVER is not quite
    ready to implement this option, or maybe because I don;t have anything
    on the other end that is FDX capable?
    
    Thanks,
    John Sobecki
    CSC/Colorado
1647.5STAR::STOCKDALETue Apr 25 1995 11:144
What version of VMS are you running?  I don't think that full duplex
stuff in LANCP and the LAN drivers works until FT3 or later of V6.2.

- Dick
1647.6works in V6.2-FT3CSC32::J_SOBECKIJohn Sobecki, DTN 592-4101, CXO3-2/D2Mon May 08 1995 12:587
    Hello,
    
    I re-tested with under V6.2-FT3 and the SET DEVICE/FULL_DUPLEX command 
    in LANCP worked!  
    
    Thanks,
    John