[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

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

1315.0. "DECrepeater90FS redundancy configuration question" by COMBAT::JONSSON (Lars Jonsson) Tue Aug 16 1994 13:50

Hi,

I wonder if the configuration below is supported. I have a customer with a 
DEChub900 at every floor. Each hub is today connected to an Ethernet port on 
a DECnis via DECrepeater90FA and a DEFLM. Is it possible to achive redundance
with DECrepeater90FS instead of the 90FA, like in the figure below? 

What I want is: fiber A and B should normally be active while fiber C is in 
backup mode. When something goes wrong with fiber A or B, fiber C should be 
activated and the 2 hubs should be connected the same DECnis. 



				     DH900
				I----------------I
				I DECrep900TM	 I
			I-------I DECrep90FS 	 I
			I	I----------------I	
			I		I		
			I		I fiber C		
			I	 DH900  I		
		fiber A	I	I----------------I	
			I	I DECrep900TM	 I	
			I	I DECrep90FS 	 I------I
			I	I----------------I	I fiber B
			I				I
			I				I
		     DEFLM			     DEFLM
		I---------------I      FDDI	I----------------I
	DECnis	I 4xL602	I---------------I 4xL602	 I DECnis
		I FDDI		I---------------I FDDI	 	 I
		I---------------I		I----------------I
						



Looking forward to comments on this....


regards,
Lars
T.RTitleUserPersonal
Name		DateLines
1315.1No. See 908.* NACAD::PAGLIARORich Pagliaro, Hub Products GroupTue Aug 16 1994 17:506
    The short answer to your question is no, the DECrepeater 90FS will not
    support redundancy in the configuration you drew in .0. See 908.* for a
    discussion as to why redundancy won't work in this situation. Please
    let me know if you have more questions.
    
    -Rich