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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

2638.0. "Redundancy with DEFMI and DEFMM " by MEO78A::BARNHOORN (Barney to his friends) Mon Aug 14 1995 07:35

    
    
    The same customer (re 2637) would like to put in some redundancy into
    his network.  
    
    They are putting in new fibre cables (via different routes) between
    buildings.  We have put in dual DEChub 900s, dual homed (FDDI) the
    systems.
    
    They are now asking about either a Fault Tolerant Fibre MAU (do we have
    one? or does a third party make one that works with the DEFMM?) or
    using a DECRepeater 90FS (DEFMI) in a redundant configuration.
    
    
    If we have to use a DEFMI can we connect it in the following way?
    
    
    
              HUB 1                     HUB 2
                    =====FDDI==========
              900EF Switch              900EF Switch    (+ more modules)
              900FP Repeater            900FP Repeater  ( in both hubs )
                  \                     /
                   \                   /
                    \                 /
                     \               /
                      \             /
                       \           / (this in backup)
                        90 FS (DEFMI)  (same config 12 times)
                           |
                        DELNI 
                         |
                        IVAXes and Process Control Systems
       
        They want to be able to survive 
           a HUB failure
           a module failure (900FP)
           a fibre cable failure
           
    
    Thanks for any information.
    
    
    Mark.

T.R Title User Personal
Name Date Lines

2638.1 Should work NETCAD::HERTZBERG History: Love it or Leave it! Mon Aug 14 1995 17:34 4

T.R	Title	User	Personal Name	Date	Lines
2638.1	Should work	NETCAD::HERTZBERG	History: Love it or Leave it!	`Mon Aug 14 1995 17:34`	4
	Yes, I believe the configuration you show will meet all requirements. The DEFMI at the bottom of your drawing would be set up as the DPR master, and the ports in the 900FPs in the 900 hubs would be set up as responders.

    Yes, I believe the configuration you show will meet all requirements. 
    The DEFMI at the bottom of your drawing would be set up as the DPR
    master, and the ports in the 900FPs in the 900 hubs would be set up as
    responders.