RE: 10Gig Copper Strawman
I appreciate your points. They align with Howard Frazier's comments at
the IEEE meetings. Apparently Cisco is not seeing demand for short copper
As for CX, I believe that there are a number of factors that limited
it's implementation which may or may not impact 10Gig. Initial problems
with EMI, and two different connectors which led to confusion.
There are a lot of proprietary copper interconnects today and we can
avoid confusion for the customer if we come up with a single, well
architected solution that allows multi-vendor interconnection. Unlike
Gigabit, we won't have a 10000BASE-T alternative to look for as a cost
alternative to fiber. This will be it.
_________ _/ ___________ Daniel Dove Principal Engineer __
_______ _/ ________ dan_dove@xxxxxx LAN PHY Technology __
_____ _/ ______ Hewlett-Packard Company __
____ _/_/_/ _/_/_/ _____ Workgroup Networks Division __
____ _/ _/ _/ _/ _____ 8000 Foothills Blvd. MS 5555 __
_____ _/ _/ _/_/_/ ______ Roseville, CA 95747-5555 __
______ _/ ________ Phone: 916 785 4187 __
_______ _/ _________ Fax : 916 785 1815 __
__________ _/ __________________________________________________________
> -----Original Message-----
> From: Les Poltrack [mailto:lap@xxxxxxxxx]
> Sent: Friday, November 19, 1999 1:53 PM
> To: DOVE,DANIEL J (HP-Roseville,ex1); '10GigCopper'
> Subject: Re: 10Gig Copper Strawman
> This is an interesting idea, but as a "marketing guy", my
> sincere opinion is that the market for 10Gigabit over
> 16-conductor copper cable is very close to zero.
> A closer analogy would be 1000BASE-CX, rather than 1000BASE-T.
> 1000BASE-CX also required a less than common cabling scheme, and
> has not achieved a high-volume position in the market.
> I have had literally zero users ask for 1000BASE-CX support,
> and I have talked to hundreds of users about Gigabit Ethernet
> technology, products and applications. I anticipate the
> same behavior for 10Gig over a 16-conductor Cu cable.
> What customers value even more for this class of application
> is compatibility, which 1000BASE-T delivers, and neither
> 1000BASE-CX nor this proposal provide.
> Best regards,
> Les Poltrack
> Product Line Manager, Gigabit Ethernet
> Cisco Systems, Inc.
> At 03:34 PM 11/18/99 -0700, DOVE,DANIEL J (HP-Roseville,ex1) wrote:
> >Hi All,
> >I thought I would start the ball rolling for a technical concept by
> >posting this strawman. If someone finds a serious problem
> with it, please
> >respond. Cable vendors.. post IL, RL and NEXT curves.
> Connector vendors..
> >do the same. Silicon vendors.. does it look feasible?
> >In the mean time, I am soliciting feedback from system
> vendors and server
> >companies to provide a breakdown of copper versus fiber
> links for their
> >high-speed switch connections. If you have data to share, please do.
> >As I stated in the meetings, customers prefer copper when
> they can save
> >money. We have seen a HUGE response to our recent 1000T
> introduction by
> >customers who grudgingly used SX to attach our switches
> together in the
> >wiring closet. I expect that as servers get 1000T NICs, we
> will see a
> >similar movement to copper in those applications. To
> quantify a bit, I am
> >getting an HP marketing guy to put together some slides to
> provide more
> >solid numbers to back those statements up.
> >Let's get this ball going!
> >Dan Dove
> >_________ _/ ___________ Daniel Dove
> Principal Engineer __
> >_______ _/ ________ dan_dove@xxxxxx LAN PHY
> Technology __
> >_____ _/ ______ Hewlett-Packard Company
> >____ _/_/_/ _/_/_/ _____ Workgroup Networks Division
> >____ _/ _/ _/ _/ _____ 8000 Foothills Blvd. MS 5555
> >_____ _/ _/ _/_/_/ ______ Roseville, CA 95747-5555
> >______ _/ ________ Phone: 916 785 4187
> >_______ _/ _________ Fax : 916 785 1815
> >__________ _/