Ray Van Dolson wrote:

Anyone know off the top of their head the "right" way to hard set a link automatically to 100Mbps Full Duplex, etc using the ifup or ifcfg files?

Don't see options in the scripts that might cover this, but maybe there's a more elegant way to do it than to do something in rc.local or hack up the ifup files myself...

You can add a line like:

ETHTOOL_OPTS="speed 100 duplex full autoneg off"

to the /etc/sysconfig/network-scripts/ifcfg-eth? files. But note that if you hard set one side of a link you must do the same on the other (switch) side or it will take the lack of negotiation to mean that it must assume half duplex.