On Mon, May 10, 2010 at 06:56:27PM +0200, Henning Brauer wrote: > * Benny Lvfgren <[email protected]> [2010-05-10 17:42]: > > What does ifconfig say, particularly the "media:" line? > > > > I've had various problems in the past with certain combinations of > > switches and ethernet hardware that couldn't work out their > > autosense capabilities correctly, and that could cause a whole bunch > > of problems including very slow data rates. > > > > Try to lock the port at the desired speed (man ifconfig, man bge), > > but check with the ISP what physical speed they want to use first. > > Otherwise you might lose contact with your server since you are (I > > assume) logged on through the same line that you are fiddling with. > > aaaargh! > > first, autoneg is pretty damn reliable, the few exceptions are VERY > old. > second, taking one side to a fixed speed is calling for trouble. you > almost certainly end up with one side full- and the otehr half-duplex. > > so if your ISP provides ethernet to you asking them whether they set > the port to auto or fixed is a good idea, but randomly pushing buttons > is as idiotic as ever. >
Not correct autoneg is only reliable when both sides are using autoneg. Some switches (most notably the cizzzcooeee) disable autoneg if the port is fixed to a speed below 1G or duplex mode. In that case you must fix the other side as well. -- :wq Claudio
