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From: robel2@mythos.ucs.indiana.edu (Allen Robel)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: Network config questions
Message-ID: <33367@boulder.Colorado.EDU>
Date: 17 Mar 91 20:25:45 GMT
Sender: daemon@boulder.Colorado.EDU
Lines: 66

I'll suggest the following modification to your diagram
so as not to waste a subnet:


    Bld1  Bld2  Bld3
      \    |   /
       \   |  /---- B
       ---------  |       ---------   ---------   ---------
      |  Node1  | |      |  Node2  | |  Node3  | |  Node4  |
      |  cisco  | |      |  cisco  | |  cisco  | |  cisco  |
       ---------  |       ---------   ---------   ---------
	          \         

		  \          

	             \   

       		     \       

                      A  \    

	               -------------
                       |     hub     |
                       |    cisco    |
                        -------------

Thus, the link to the node cisco is also the link to 

one of the buildings.  One way to implement B in the above 

diagram, if you're using fiber, is to use a multiport
fiber repeater with one port feeding Node1 and the other Bld3.  

If you're worried about the cost of the repeater, consider that 

you're saving an interface on the cisco.  In detail, it would
look like...

                                                 Bld 1
                           |---[fiber xcvr]-----[fiber repeater]
[Hub cisco][fiber xcvr]----|
                           |---[fiber xcvr][Node1 cisco]

                         MultiPort
                         Fiber
                         Repeater

A disadvantage is that you'll have another repeater in
the signal path to Bld3 so will need to watch the number
of stacked repeaters (10baseT hubs etc.) in that building.  

Another advantage, though, is that Bldg3 gets fewer hops to 

the hub cisco (so let it be the one  in which the Provost or 

other Big Cheese resides :-)


regards,

Allen Robel                         robelr@mythos.ucs.indiana.edu 

University Computing Services       ROBELR@IUJADE.BITNET 

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