🚀 go-pugleaf

In article <1993Jan8.010951.17172@tandem.com>, louis@cpd.Tandem.COM (Louis Meadows) writes:
|> In article <1993Jan6.165934.7185@uxmail.ust.hk>, ee_hflo@uxmail.ust.hk (Michael Lo Ho Fung) writes:
|> > ... They are installing a Giga switch connect five FDDI ring together.
|> > And the speed will upgrade from 100Mbps to 3.5Gbps. 
|> > Anyone can tell me what is Giga switch? Why is can achive such high speed?
|>
|>  When I was at Interop in October Digital had such a switch.  This switch
|> used new "ATM" protocol.  This switch had 2.2 Gbit rate.  It could handle
|> ten 100 mbit FDDI connections.   "ATM" protocol is wonderfull. 

    Some of that is misleading.
    GIGAswitch(tm), to be sold later this year, starts out as a 22-port
    FDDI bridge, growing later to 34 ports.  Its backplane can handle
    3.6 Gbit/s and 6.25 million packets/s.  The switch transparently handles
    all existing IEEE 802.2 LAN protocols.  The ATM line cards for the
    GIGAswitch are optional, and will become available some time after the
    FDDI bridging function.

    To answer Michael's question, the peak aggregate data rate on five
    FDDI rings that may send packets to each other is nearly 5 * 100 Mb/s.
    Hong Kong Univ. would have to install 22 FDDI rings in order to
    approach a peak aggregate rate of 2.2 Gb/s, or 34 rings for 3.4 Gb/s.
    Any packets that need to cross rings will pass through the GIGAswitch.

    (GIGAswitch is a trademark of Digital Equipment Corp.)