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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

524.0. "FDDI II" by GRANPA::LYOUNGER () Tue Mar 31 1992 15:23

    FDDI 2 ??
    
    A salesman just called me because a customer wanted to know about FDDI
    2 (FDDI II). It seems that an independent consulant told the customer
    that if he was going to install fiber in his plant it should be able to
    run the next generation of FDDI. Has anyone heard about this??  Please
    let me know on any specifics or rumors.

T.R	Title	User	Personal Name	Date	Lines
524.1		KONING::KONING	Paul Koning, NI1D	`Tue Mar 31 1992 16:38`	11
	The FDDI Marketing people have some nice writeups about FDDI-II. These will tell you that FDDI-II is not a "next generation" but rather a side track that doesn't go in any useful direction. On the other hand, it doesn't really matter for the question you asked. FDDI-II has very little in common with FDDI (the name is really misleading, intentionally so in our opinion) but it does share the same PMD and the same data rate. So the same media (fiber, or copper for that matter) that support FDDI would also support FDDI-II if it ever becomes real. paul
524.2		RIPPLE::KOPEC_ST	Squash:Racketball::Chess:Checkers	`Mon Jul 26 1993 02:31`	7
	Paul, has anything changed in the FDDI II space in the last year? Is it dead? Thx, Stan
524.3	has this moved from X3T9 to 802?	DELNI::GOLDSTEIN	Bad cop	`Tue Jul 27 1993 10:12`	6
	I heard a rumor recently that FDDI-II might be under study by IEEE 802.9, the same folks who have recently put out "Isochronous Ethernet". Anybody know anything about that? (802.9 began by doing "Integrated voice/data LAN", a weak attempt to sell some otherwise and eventually useless Northern Telecom silicon.) fred
524.4	FDDI-II is alive but there are some problem for users.	TKTVFS::IDO	Naoki Ido, CSC/TOKYO, EWB, DTN 680-2456	`Fri Jul 30 1993 00:39`	16
	FDDI-II is still alive in ANSI X3T9. The problem on FDDI-II station can't use the hybrid-mode in same ring where stations of FDDI-I are located. Hybrid-mode is one of the feature on FDDI-II and supports Isochronouse transmittion. FDDI-II can also use Basic-Mode if it talks to FDDI-I station but it is decided at ring initialization which mode is going to be used. This means that customer can't use FDDI-II's Hybrid-mode in FDDI-I ring. so they have to build a new ring for FDDI-II other than current FDDI-I ring already invested. Another problem is the cost of products. Some vendor said that FDDI-II products will be more expensive than FDDI-I. I don't think many customer invest to such less flexible but expensive products. This is my understanding for FDDI-II. Am I wrong? Naoki
524.5		KONING::KONING	Paul Koning, A-13683	`Mon Aug 02 1993 14:39`	10
	FDDI-II requires you to throw away ALL the FDDI stations you have. It doesn't offer any important new capability. There may be one or two small vendors that support it, but none of the major ones do. No higher layer protocol requires it or would derive any benefit from having it. FDDI-II may or may not be completely dead yet, but it's certainly on the critical list. The best thing to do is steer your customers away from that dead end. paul