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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

3160.0. "DECMAU900TH questions" by PRSSOS::PEYRACHE (Jean-Yves Peyrache Country Support Group France) Mon Jan 15 1996 13:38


 Hi,

 starting a beautiful Token-Ring configuration/installion based
 on DECHUb900/DECMAU900TH products.

 i hope to have some answers here to interesting questions from my customer
  (Token-Ring older IBM customer)

  1/ in which case the Decmau900TH will disconnected a ports/stations ?

  2/ About Relays on DECMAU900TM . what is the MTBF ? (numbers of               
     opening/closing)


  thanks in advance
  
  jean-yves
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3160.1NETCAD::GERHARDTOut of ControlMon Jan 15 1996 16:1814

>  1/ in which case the Decmau900TH will disconnected a ports/stations ?

    the port will wrap if the attached station changes speed, is removed,
    or reports beacon frames.
    
    
>  2/ About Relays on DECMAU900TM . what is the MTBF ? (numbers of               
>     opening/closing)

    
    100 million opens and closes.  they are the same relays that are used 
    in telephone systems where reliability is key.
3160.2more errors ?PRSSOS::PEYRACHEJean-Yves Peyrache Country Support Group FranceTue Jan 16 1996 13:0110

 Thanks for these infos

 about disconnection , DEmau900TH report (under HUBwatch) "duplicate active
 monitor" error message.

 do you know if this error force a disconnection of the port/station ?

 Jean-Yves
3160.3NETCAD::GERHARDTOut of ControlThu Jan 18 1996 15:3111
    under which screen do you see the duplicate active monitor?  the Ring
    Error monitor?  the ring error monitor is a display of error messages
    sent to the ring error monitor address.  the DTMXM receives the ring
    error messages and saves them for display by hubwatch.
    
    token ring ( not dedicated token ring) has only one active monitor. 
    when something happens where there are 2 active monitors ( 2 rings
    joined)  the protocol operated on by the token ring chips ( the DTMXM
    has one) is to go into contention and work out that only one of them is
    active monitor.  they don't need to exit the ring ( at least my
    experience with the TI chipset), but could.
3160.4out of the ringPRSSOS::PEYRACHEJean-Yves Peyrache Country Support Group FranceFri Jan 19 1996 13:4511
>>the Ring Error monitor?

 Yes, i save all errors in a file do you wa them ?

 >>they don't need to exit the ring

  but i my case 900TH disconnect  the station (culprit station i hope)

 do you think that is a normal way ?

 jean-yves