[Gllug] Test gigabit LAN between Fedora 12 and Snow Leopard

Richard Jones rich at annexia.org
Thu Apr 29 21:35:48 UTC 2010

On Thu, Apr 29, 2010 at 10:53:42AM +0100, gvim wrote:
> I want to test 1000/Mbps throughput between a Mac OS X 10.6 box and
> a Fedora 12 box over a Netgear GS105 switch. The problem is mainly
> with the OS X box where the ethernet socket has only a single red
> light lit on the left side yet at the switch the other end of the
> cable connects with both lights green which suggests a full gigabit
> connection. Software preferences > Network has the Ethernet set to
> 1000baseT/full duplex/1500 MTU so both lights on the ethernet socket
> should be green.

You can use ethtool on the Linux side, and System Preferences ->
Network -> Advanced -> Ethernet on the Mac OS X, to see what speed and
duplex [duplicity?] they are connecting to the switch at.

> Any recommended software for testing this gigabit LAN connection
> from the Fedora 12 box?

Ttcp is good for basic TCP, but more fun is to use udpcast which sends
multicast and broadcast traffic through the switch and is very good
for exposing the true colours of cheap switches.


Richard Jones
Red Hat
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