[K12OSN] Switches

[Ritchie, Josiah S.]

A star makes an upgrade to 10Gig between the server and the main 1G
switch a lot easier to implements. Just switch out one switch. You may
never need it, but maybe you will. 

I could also picture a scenario where you would have multiple 1G servers
(for redundancy or shares on another server or whatever) plugged into a
switch with a 10G connection between this switch and the switch that
stars out to your clients.

In either of those scenarios you could get away with 1G between the
devices, but it could be restrictive/a bottle-neck.

JSR/

> -----Original Message-----
> From: k12osn-bounces at redhat.com [mailto:k12osn-bounces at redhat.com] On
> Behalf Of Les Mikesell
> Sent: Thursday, December 01, 2005 11:37 PM
> To: Support list for opensource software in schools.
> Subject: Re: [K12OSN] Switches
> 
> On Thu, 2005-12-01 at 22:25, Jason Straw wrote:
> 
> > nope... 95%+ of generated traffic is upstream...
> 
> If the traffic all has to traverse a single link at
> any point, you won't gain anything by distributing
> it elsewhere.  Your problem must have been the half
> duplex or worse, a mismatch between switches.
> 
> > The more connections generated, the worse the switches do.  You gain
a
> > lot of sanity by running a star, and you can _ensure Full Duplex_.
> 
> The duplex setting is negotiated separately between each pair
> of connected ports.  I don't see how the overall topology
> would affect that, other than a bad connection affecting
> fewer end points.
> 
> --
>   Les Mikesell
>      les at futuresource.com
> 
> 
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