On Tue, Sep 28, 2010 at 03:51:17PM -0400, m.roth at 5-cent.us wrote: > We've just moved one a new server from our sever room, where I built it, > to the datacenter. We want to force autoneg off, and tell it gigabit and > full duplex. Using ethtool, I get no errors setting the speed or duplex. Note that the gigabit over copper standard _requires_ autoneg on. If you do manage to turn it off then you might break things unexpectedly. http://en.wikipedia.org/wiki/Autonegotiation In 1999, the negotiation protocol was significantly extended by IEEE 802.3ab, which specified the protocol for gigabit Ethernet, making autonegotiation mandatory for 1000BASE-T gigabit Ethernet over copper. Specifically Section 28D.5 Extensions required for Clause40 (1000BASE-T) -- rgds Stephen