FDDI or 100Mb Ethernet
Deepak Jain
deepak at jain.com
Fri Feb 6 22:16:30 UTC 1998
Depends on the switch. Some switches, (notably Bay 28115Rs) perform
poorly in fast ethernet/full duplex mode whereas they perform like champs
in half-duplex mode. What they say they "do", and what they really do
well are sometimes not the same thing.
-Deepak.
On Fri, 6 Feb 1998, Dorn Hetzel wrote:
>
> I have started to look at "Fast Ethernet" and see "Full-Duplex
> Switched Fast Ethernet". I mean, the switch ports are SO cheap,
> why do anything less...
>
>
> On Fri, Feb 06, 1998 at 04:17:53PM -0500, Dean Anderson wrote:
> > At 2:35 PM -0500 2/6/98, Deepak Jain wrote:
> > >FDDI can run full duplex, as for the other two things its a matter of
> > >opinion & conditions. (One I agree with, but still opinion).
> >
> > For desktops, I agree completely that fast ethernet is the way to go. Fast
> > ether hubs are cheaper and easier to wire than cddi hubs (no cross over
> > cables required).
> >
> > For a backbone, though, I would point out that FDDI is a token ring
> > protocol, so performance is always predictable. Ethernet, and fast ethernet
> > have performance knees. (Actually, I'm assuming Fast Ethernet will have a
> > knee at around 70% utilization. I haven't tested that it really does).
> > Also, both Fiber and Copper can be implemented with dual attached rings
> > which might be an advantage for a backbone link.
> >
> > --Dean
> >
> >
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> > Plain Aviation, Inc dean at av8.com
> > LAN/WAN/UNIX/NT/TCPIP http://www.av8.com
> > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >
>
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