large clusters and topologies
glindahl at hpti.com
Fri Jul 28 11:34:16 PDT 2000
> that and you can now get fast-ether switches with port-counts up to about
> 384 ports which isn't to shabby compared to the denisty of most other
Actually, you've been able to get those for quite a while. Centurion at UVa
was built in late 1998 with a 288 port switch, which was composed of 12
24-port switches with gigabit uplinks, and a 12-port gigabit switch. It's
dense, but the particular stuff I usd (3com) was expensive in today's terms.
Today you can both buy chassis switches with a gazillion ports (but often
limited backplane bandwiths), or cobble together lots of cheaper switches
such as HP 4000M procurves with copper gigabit uplinks and a gigabit switch.
The same philosophy, but the details as to who makes the most cost-effective
components keeps changing over time.
We tried to keep an up-to-date document describing how to build cheap
ethernet switches for various sizes, but it was too hard to keep it from
p.s. and, incredibly enough, if you want an 80 port HP4000M, it's still
cheaper to buy 2 40-port boxes and throw away the second chassis than it is
to buy expansion cards.
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