[CentOS] ethtool
Stephen Harris
lists at spuddy.org
Tue Sep 28 19:58:22 UTC 2010
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
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