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Conference 7.286::fddi

Title:	FDDI - The Next Generation

Moderator:	NETCAD::STEFANI

Created:	Thu Apr 27 1989
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2259
Total number of notes:	8590

155.0. "IP-router thruput " by ZPOVC::HWCHOY (It must be Thursday.) Tue Oct 16 1990 11:31

    
         +-----+  
    =====| CON |==============
         +-----+
           |
           |
           |
      +----|+
      |   !!|
      +---|-+
 DECsystem|
 5000     |
          |
         +-----+
         | CON |
         +-----+
    
    Hi, the above config shows a DECsystem with 2 FDDIcontrollers so it
    serves as an IP-router. Does anyone have any idea what sort of
    throughput I can expect from such a router?
    
    
    
         +-----+  
    =====| CON |==============
         +-----+
           |  |
           |  |
           |  |
      +----|+ |
      |   !!| |             In this modified config where I put the
      +---|-+ |             remaining A port of the lower CON to another
 DECsystem|   |             M port of the top CON. What will happen?
 5000     |   |             Will the CONs get very confused? I am! :)
          |   |
         +-----+
         | CON |
         +-----+
    
    appreciate any help. This is for MINDEF of Singapore, who visited
    engineering recently.
    
    rgds,
    hw

T.R	Title	User	Personal Name	Date	Lines
155.1	Second configuration is one ring	LEVERS::BENSON	DTN 952-3555	`Wed Oct 17 1990 13:16`	10
	Hi, I cannot answer the first of your questions myself. But in the second configuration, the attachment from the lower con's A port to the upper con's M port will join the two rings into one. What are you trying to achieve with the second configuration? Regards, Dave.
155.2	claifications	ZPOVC::HWCHOY	It must be Thursday.	`Thu Oct 18 1990 03:56`	17
	re .1 That's the part I couldn't figure out, if the connection between the 2 CONs link them into 1 ring, then what will the DECsystem 5000 be doing? Will it effectively become a router attached to the same LAN? Config 1 is what we want to do, 2 rings connected through an IP-router. However, in the case of failure in the router, we want the ring to join into the main ring (top CON). We know we can do this by physically plugging the lower CON to the top CON when the failure occurs. What we want to find out is whether there is a way of bypassing the manual intervention, ie having the CON-to-CON attachment up but only becoming active if the router fails. rgds, hw (hope that clears up the confusion)
155.3	Try Chran.	QUIVER::WEEKS		`Fri Nov 02 1990 15:42`	4
	You can ask Chran Chang at watsed::chc, he should have the numbers you're looking for. Phil
155.4	DS5000 TCP/IP-to-FDDI router performance	SWAM3::MARCUS_RI		`Wed Dec 12 1990 22:19`	11
	I need some help in answering a question about IP router throughput. Do you have any throughput numbers for a DECstation or DECsystem 5000 acting as a TCP/IP-to-FDDI IP router? Please respond to me at: All-in-one: Rich Marcus @LAO -or- VMSmail: SWAM3:MARCUS_RI Thanks in advance
155.5	Print you PosrScript file and FAX it	SWAM3::MARCUS_RI		`Sat Dec 22 1990 03:28`	7
	Re: -1 Someone, I don't know who, sent me a PostScript file said to contain charts and graphs of FDDI-to-Ethernet performance. Whoever that someone was, would you please print out those charts and graphs and then FAX them to me? I don't have access to a PostScript printer. My FAX number is (213) 642-1100. Thank you whoever you are