[HECnet] Towards the Mouth of Madness....

[Paul Koning]

Ok, true if you're talking half duplex with multiple active nodes.

	paul

On Jul 12, 2011, at 5:47 PM, Kari Uusim  ki wrote:



Yes, absolutely! The bandwith was 98% of the nominal value. Ethernet starts diminshing after 60%.

I did extensive testing of FDDI back in early -90's and put as much load on it as I could with about a dozen Alphas of the time and found out that it easily outperformed Ethernet.
FDDI gear were more expensive than Ethernet, but were more useful.

FDDI was really outperformed by GbE as the multiplexed 100Mbit/s wasn't available on so many platforms.


Kari


On 13.7.2011 0:29, hvlems at zonnet.nl wrote:
It took HP until 2006 to replace the FDDI lan with ethernet technolgy.
The fault tolerance of FDDI and the build quality of DEC's gigaswitch
products.
The bandwidth of FDDI is a lot better than fast ethernet.
Hans

Verzonden vanaf mijn draadloze BlackBerry  -toestel

------------------------------------------------------------------------
*From: * Joe Ferraro <jferraro at gmail.com>
*Sender: * owner-hecnet at Update.UU.SE
*Date: *Tue, 12 Jul 2011 17:12:02 -0400
*To: *<hecnet at update.uu.se>
*ReplyTo: * hecnet at Update.UU.SE
*Subject: *Re: [HECnet] Towards the Mouth of Madness....


Off topic... I received a page, a few weeks prior, on a machine that was
not pinging. Turns out, it was one of a few old NOVA class boxes we
still have at my work,   using FDDI for connectivity. Fortunately, a
disconnect / reconnect brought the ring back online; I was scared (and a
bit excited in a strange way) for a few moments that I was going to have
to do some extensive troubleshooting... FDDI still lives.

On Tue, Jul 12, 2011 at 4:27 PM, H Vlems <hvlems at zonnet.nl
<mailto:hvlems at zonnet.nl>> wrote:

    __

    Remember what I wrote: this happened nearly two decades ago.____

    IP is the protocol that survived and most people aren   t even aware
    what happened on local area networks before, say,1998.____

    I worked for Fuji, photosensitive films, paper and offset printing
    products.____

    Most of the IT equipment was made by DEC: PDP-11   s (/44, /84, /93,
    /24, /73 and /23), VAXes, an IBM mainframe (4081) and PC   s.____

    And lots of other gear, most of it in the research lab. A Motorola
    box that ran Motorola Unix, and an RS/6000 under AIX 2.4 (?).____

    The lingua franca was DECnet and LAT. No IP, though some PC   s used
    Novell and SNA over tokenring to make terminal emulation to the
    mainframe possible.____

    No IP.   Sounds weird in today   s world but DECnet eventually
    connected everything. We got a **very** early Cisco router that did
    level 1____

    DECnet routing between the corporate ethernet and the finance dept
    token ring. Another (DEC) box that routed DECnet over Datanet/1
    (that   s X25 in Europe IIRC). The mainframe used an SNA/DECnet
    gateway (the big channel attached box).____

    The RS/6000 and the Motorola systems also ran DECnet, endnode only.____

    To make this a little interesting we ran the first FDDI network in
    the Netherlands.____

    Trouble shooting wasn   t always easy, especially if the SNA/DECnet
    gateway was involved!____

    Hans____

    __ __

    ------------------------------------------------------------------------

    *Van:*owner-__hecnet at Update.UU.SE <mailto:hecnet at Update.UU.SE>__
    [mailto:owner- <mailto:owner->__hecnet at Update.UU.SE
    <mailto:hecnet at Update.UU.SE>__] *Namens *Jason Stevens
    *Verzonden:* dinsdag, juli 2011 21:10
    *Aan:* hecnet at update.uu.se <mailto:hecnet at update.uu.se>
    *Onderwerp:* Re: [HECnet] Towards the Mouth of Madness....____

    __ __

    AIX and decnet? now that'd be ... non conformist & fun! ____

    ------------------------------------------------------------------------

    Geen virus gevonden in dit bericht.
    Gecontroleerd door AVG - www.avg.com <http://www.avg.com>
    Versie: 10.0.1388 / Virusdatabase: 1516/3760 - datum van uitgifte:
    07/12/11____