Stephen Harris wrote: > 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) > Thanks, Stephen, that looks like my answer. That server, and the dhcpd server, are both fat and happy on gigabit pipes. mark