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Posted by John E. on October 12, 2007, 5:09 pm
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What's a simple way to test a LAN for throughput after upgrading to gigabit?
(Cat5e cables, switch, patch panel, and patch cables will all be upgraded.)
Is there a utility to use for this purpose? Or some feature built-into the OS
to watch while transferring a large file?
LAN consists mostly of systems using WInXP and Mac OS X.
Thanks,
--
John English
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Posted by Jeff Liebermann on October 12, 2007, 6:14 pm
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>What's a simple way to test a LAN for throughput after upgrading to gigabit?
>(Cat5e cables, switch, patch panel, and patch cables will all be upgraded.)
>
>Is there a utility to use for this purpose? Or some feature built-into the OS
>to watch while transferring a large file?
>
>LAN consists mostly of systems using WInXP and Mac OS X.
Is there some reason you're asking a question about wiring in a
wireless newsgroup? Not a problem, but I'm curious as to your logic.
I klike IPerf. Versions available for most OS's:
<http://dast.nlanr.net/Projects/Iperf/>
<http://dast.nlanr.net/Projects/Iperf/iperfdocs_1.7.0.html>
Setup a known good machine running Iperf as a server. Run:
iperf -s
On the various clients, run:
iperf -c ip_address_of_server
There are lots of other options to play with. Run the test in both
directions with:
iperf -r -c ip_address_of_server
as creative wiring sometimes causes traffic to work well in one
direction, but not the other.
As for watching large files go past, I kinda like to watch the
flashing lights on the switch. They're kinda hypnotic and counteract
the effects of coffee and running wires all night. If you want
detail, setup a sniffer computer, arrange a monitor port or use an
ethernet tap (or hub), and use Ethereal or WireShark, with a filter,
to monitor the traffic.
--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558 jeffl@comix.santa-cruz.ca.us
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS
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Posted by John E. on October 12, 2007, 6:26 pm
If you were Registered and logged in, you could reply and use other advanced thread options > Is there some reason you're asking a question about wiring in a
> wireless newsgroup? Not a problem, but I'm curious as to your logic.
Doh! Just due to cross-posting blindness. I have these 2 ng's as posting
defaults and I have to *remember* to delete the inappropriate ones. As I have
done now...
> I like IPerf.
Thanks, Jeff.
--
John English
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Posted by Robert Redelmeier on October 13, 2007, 4:15 am
If you were Registered and logged in, you could reply and use other advanced thread options >[Jeff wrote:]
>> I like IPerf.
>
> Thanks, Jeff.
Personally I like ole'grandad, `ttcp` .
But be aware: very few machines have the capability of saturating
GBE. The PCI bus doesn't have the bandwidth. The best many
can do is aroun 300 Mbps.
Consider asking your cabling contractor for Cat5e certification
tests. These are the standard when cabling reliability is
important.
-- Robert
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Posted by John E. on October 13, 2007, 1:49 pm
If you were Registered and logged in, you could reply and use other advanced thread options > But be aware: very few machines have the capability of saturating
> GBE. The PCI bus doesn't have the bandwidth. The best many
> can do is aroun 300 Mbps.
Thanks. I'm really glad to know that. Keeps expectations realistic.
> Consider asking your cabling contractor for Cat5e certification
> tests. These are the standard when cabling reliability is
> important.
I'm that guy.
What equipment is used to certify C5e?
--
John English
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