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Conference netcad::hub_mgnt

Title:DEChub/HUBwatch/PROBEwatch CONFERENCE
Notice:Firmware -2, Doc -3, Power -4, HW kits -5, firm load -6&7
Moderator:NETCAD::COLELLADT
Created:Wed Nov 13 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:4455
Total number of notes:16761

982.0. "Ethernet Heartbeat required for DEChub components?" by ALFHUB::RUFF () Thu May 12 1994 18:56

    
    Am I correct in assuming that the DEFAR-AA, whether in a DEChub
    backplane or standalone, needs to be connected to a tap (or DESTA)
    with Heartbeat enabled?  I have found that where people are 
    replacing DEMPR's they are using the same type configuration.
    The documentation does not state anything either way.
T.RTitleUserPersonal
Name		DateLines
982.1DISABLE HB for Repeaters ONLY.MSDOA::REEDJohn Reed @CBO, DTN:367-6463, KB4FFE, SouthEastThu May 12 1994 19:3612
    most IEEE 802.3 repeaters require that NO HEARTBEAT comes from the
    transceiver.  Digital' DEMPR, and DETPR both can detect the
    transceiver's heartbeat and figure out what to do with it.  
    
    I don't know about the DEFAR.  I would disable Heartbeat on any
    transceiver going to a repeater, or a DELNI which services any
    repeaters.  Better, I would use a BRIDGE, everywhere you might consider
    putting a repeater.  It will be much easier to troubleshoot in the
    future, and your customers technical people will thank you for it.  Teh
    bridges should have heartbeat ENABLED.
    
    JR
982.2QUIVER::SLAWRENCEThu May 12 1994 21:103
    
    Heartbeat should be disabled when connecting a DEFAR