Alternatively, putting: mii-tool -A 100baseTx,10baseT eth0
in a startup script on the roach should do the job with much less fiddling. (And whoever packages etch for the roach should add ethtool.) --Andy On Wed, Oct 27, 2010 at 1:14 PM, Dan Werthimer <[email protected]> wrote: > > > Dear Roach Users, > > We've had several reliability problems with the > 100Mbit/1Gbit ethernet port on the Roach board > when the port is used at 1Gbits/sec. > > The port works well at 100Mbit/sec, but > it doesn't work reliably at 1 Gbit/sec. > > The solution is to use the port only at 100Mbit/sec: > if you are connecting roach to a computer, you can tell > the computer to negotiate the link at 100Mbit/sec. > > Another solution is to connect your roach board to > a 100Mbit switch (these cost about $20), and connect > this switch to your 100Mbit/1Gbit computer or network. > Then roach will then negotiate the link at 100Mbit/sec > and work reliably. > > The problem is with the National PHY chip. Some chips > work, some don't, but even those that work are marginal; > After replacing the chip, the link usually works for a while at 1Gbit, > but later some people experience problems when using the link > at 1Gbit/sec. Roach II uses a different PHY chip. > > > Best Wishes, > > Dan > > > >
