[CentOS] force 10 megabit full duplex

William Warren wrote:
> the switch is already set to 10 megs FD on it's end but the autoneg 
> doesn't work right on the machines end for some ereason..it comes up HD 
> instead of FD so i have to force it

The auto negotiation works only if both ends are configured to use it. 
If you force one end, you must force the other end too.  If you do not 
force both ends, the one configured to auto negotiate will detect the 
speed properly, however it will always use half duplex.

Either set both sides to auto negotiate and don't worry about it.  Or in 
an extremely unlikely case it doesn't work (very old or buggy equipment, 
or something very specialized) force it on both ends and put some labels 
on the port so other folks will know the port on the switch is forced.