Conference 7.286::fddi

1617.0. "DUAL HOMING configuration" by ATYISA::ALLUCHON () Thu Mar 09 1995 14:01

I have a FDDI config and I don't know if it works.
It is a DUAL HOMING configuration.

In order to make you understand it more easily, you will find the following 
figure :


		
		========= A		  B====== Dual Ring
			  !		  !
			!--------------------!
			! Concentrator 900MX !
			!--------------------!
			   M		M
			   !		!
			  /		\
			 /		 \
			/		  \
		       /		   \
		      /			    \
		     /	  --------------     \
		    !	  !	       !      !
		    A  	  B	       A      B	
		    !     !            !      !
		--------------	   ----------------
		!  900EF     !     !  900EF       !
		--------------     ----------------


In fact I use this configuration in order to limit the number of M concentrator
ports. I am obliged to use also two different Hubs with 2 900EF in 
order to have 12 ethernet segments.

If we looks at the FDDI matrix configuration, it seems to works well. But, in
fact I am really in doubt.
So, does it works?

NB: this note has been added in the HUB Management conference.

    
    This does not work, because the fddi connection rules require that 
    the stations take the tree (A-M or B-M) connections over the peer
    (A-B or B-A) connections.