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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

227.0. "Bridge needed for each hub to be managed?" by ZPOVC::INDO03::FUNGSIONG (Fung Siong -- XIR) Wed May 05 1993 09:59

    Hi,
    
    We are proposing this configuration to our customer. Very simple (maybe
    *too* simple): Do we need the second bridge to manage the whole
    repeaters?
            
             ThinWire
        _____________________
        |                   |
    DEChub 90 #1	DEChub 90 #2
    
    D   D  D              D 
    E   E  E              E
    C   C  C              C
    A   b  r              r
    g   r  e              e
    e   i  p              p
    n   d  e              e
    t   g  a              a
    90  e  t              t
        90 e              e
           r              r
          90T            90T
    
    The Network Buyer's Guide specifies that a DECagent 90 can manage four
    interconnected hubs; do we need a bridge in each interconnected hub?
    
    Sorry if it is too novice a question :-)
    
    
    Regards,  
    Fung Siong

T.R	Title	User	Personal Name	Date	Lines
227.1	looks good	GIDDAY::DRANSFIELD	Mike Dransfield, Sydney RSSG	`Wed May 05 1993 23:15`	7
	re: .0 If the hubs are connected with the thinwire port on the side and the management cable, then it is a dual-hub or 16 port hub and it needs exactly one bridge in it for the repeaters to be manageable by a DECagent. You diagram suggests that what you have got is one 16-port hub with a bridge, an agent and some repeaters. This is fine. Mike
227.2	mgt cable?	HGOVC::LILLIANTANG		`Thu May 06 1993 08:56`	8
	re.-1 what do you mean by 'management cable'? the Decbridge will communicate with the repeateres via the asynch bus of the hub and then via the thinwire to the second hub's asynch bus? Lillian
227.3	RS423 cable also	PDVEUS::DELUCAGIL		`Fri May 07 1993 07:42`	11
	You havo to connect the two hubs using the ThinWire cable (max lenght = 50 mt) and also with a RS423 cable; this second cable isn't used for Ethernet datas, but for management signals. Look at the DEChub 90 Owner Manuals for more detail about cables and lenghts. Ciao. Gilberto
227.4	How about four interconnected hubs?	ZPOVC::INDO03::FUNGSIONG	Friday Again? Thanks God!	`Wed May 12 1993 01:30`	13
	Hi Again, Thanks! I am glad we proposed the right design. BTW, should the customer require additional hub, can we just connect the additional hubs using ThinWire like 1st and 2nd hub, or should we use a bridge or DECrepeater 90C to do that? I read in the DEChub 90 manual that daisychaining more than two is not a valid config (is that right?). Still confuse me: a DECagent 90 can manage four interconnected hubs. How do we achieve this? Best Regards, Fung Siong - Indonesia
227.5	multiple communty names	MEO78A::BARNHOORN	Barney to his friends	`Wed May 12 1993 05:39`	10
	re .4 To add another HUB (or HUBpair) you will require a DECbridge90 in that HUB. OOn the DECagent add a community (2), then give the details about the new DECHUB, eg Bridge Address, community name to reference the new hub. Mark.