Gigabit Switch

Bob Drzyzgula bob at
Tue Nov 11 11:17:50 EST 2003

I will add that the ability of a second
gigabit adapter to add to the total 
bandwith available to a node will depend
a great deal on (a) the architecture of
the node and (b) the adapter chosen.

For example, two 32-bit gigabit adapters
on the same PCI bus aren't going to do
you much good, while two 64-bit adapters
on separate PCI busses might.


On Tue, Nov 11, 2003 at 09:05:10AM -0600, Gerry Creager N5JXS wrote:
> One key element to look at is fabric speed.  If the backplane can't keep 
> up to wire-speeds, you're going to suffer some slowdown and latencies 
> associated with the network.  Whether that's a problem in your 
> installation, or not, we can't tell from this range.  However, if 
> there's sufficient money I'd be buying the most capable switch I could 
> from a backplane and port sustainability point as I could.
> gerry
> Keyan Mehravaran wrote:
> >Hi,
> >
> >I am planning to connect 8 dual Xeon PCs
> >with onboard gigabit through a switch and
> >I only need access to the "zeroth" node.
> >I have two questions:
> >
> >1) Is there any benefit to using "managed"
> >   switch rather than the "unmanaged" ones?
> >
> >2) Is it possible to increase bandwidth by
> >   adding an extra gigabit NIC to each node?
> >   If the answer is yes, then should all the
> >   16 ports connect to the same switch?
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