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Conference noted::etherworks

Title:EtherWORKS Notes Conference
Notice:WWW server at http://ftp.digital.com/pub/DEC/adapters/
Moderator:NETCAD::STEFANI
Created:Wed Sep 01 1993
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1318
Total number of notes:5673

1251.0. "DE500-XA FULL DUPLEX NOT OPERATIONAL" by PRSSOS::HOFFMANN (HOFFMANN Lionel/loc=evt/DTN number=858 5647) Mon Jan 27 1997 07:07

    Hello,
    
    I have a customer with a DE500-XA installed in an alphaserver 2100
    running OPENVMS version 6.2
    this guy tries to establish a link between this the DE500 and an OST
    (Xcellys) equipment which is supposed to work at 100 mb and FULL DUPLEX
    It seems not to work .I have forced the speed and the FULL DUPLEX mode 
    on the DE500-XA using LANCP .The customer did the same for the OST hub
    but when we looked at LANCP issuing the command:
    LANCP> SHOW DEVICE /STATUS EWB0
    then FULL DUPLEX is enabled but NOT OPERATIONAL....
    It looks like the de500-XA couldn't recognize the FULL DUPLEX mode at
    the other mode.
    Is it normal even if we force it at both ends?
    Should'nt it work normally ?
    What about the counter "FULL DUPLEX OPERATIONAL" ?can I trust it?
    Any ideas? 
    any help appreciated
    LIonel
T.RTitleUserPersonal
Name		DateLines
1251.1EVMS::JSTICKNEYJay Stickney, OpenVMS LAN Eng., 381-2020, ZK3-4/T12Mon Jan 27 1997 09:3051
    Lionel,
    
    I just tried the full duplex setting on DE500-XAs on my V6.2-1H3
    system and it appears to work correctly.  I'm not sure if there were
    any problems with plain V6.2 that were fixed by 1H3 but I'll check
    into it.
    
    I did notice that when I set the full duplex setting LANCP does not
    show it as operational until a user is started.  This may be what
    you're running into.  For example:
    
    $ mc lancp set dev ewb/speed=100/full
    $ mc lancp sho dev ewb/param
    
    Device Parameters EWB0:
                 Value  Parameter
                 -----  ---------
                Normal  Controller mode
              External  Internal loopback mode
     00-00-F8-01-A4-8A  Hardware LAN address
               CSMA/CD  Communication medium
                    32  Minimum receive buffers
                    32  Maximum receive buffers
                   Yes  Full duplex enable
                    No  Full duplex operational
           TwistedPair  Line media
                   100  Line speed (megabits/second)
    
    Now if I start a user on ewb with a small program and take a look...
    
    $ spawn /nowait mca recv ewb
    %DCL-S-SPAWNED, process SYSTEM_1 spawned
    $ mc lancp sho dev ewb/param
    
    Device Parameters EWB0:
                 Value  Parameter
                 -----  ---------
                Normal  Controller mode
              External  Internal loopback mode
     00-00-F8-01-A4-8A  Hardware LAN address
               CSMA/CD  Communication medium
                    32  Minimum receive buffers
                    32  Maximum receive buffers
                   Yes  Full duplex enable
                   Yes  Full duplex operational
           TwistedPair  Line media
                   100  Line speed (megabits/second)
    $
    
    Hope this helps,
    Jay.
1251.2thanks .What about the other end?PRSSOS::HOFFMANNHOFFMANN Lionel/loc=evt/DTN number=858 5647Tue Jan 28 1997 06:2610
    Hi Jay,
    thank you very much for your quick answer.your informations are
    interesting and I will try starting a user to see what 's happening
    with the "FULL DUPLEX OPERATIONAL" counter...
    I already got the DE500-xa working ok back to back with another one .
    But in that case ,it is a OST hub at the other end.It is supposed to be
    forced into full duplex mode.Do you think that it could disturb the
    de500-xa and how?
    thanks for your help
    Lionel