Nic Speed Setting

1. 영구적으로 설정
    [root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
    DEVICE=eth0
    HWADDR=00:0C:29:7F:DC:A5
    ONBOOT=yes
    NM_CONTROLLED=yes
    BOOTPROTO=static
    IPADDR=192.168.1.2
    NETMASK=255.255.2550
    ETHTOOL_OPTS="wol g speed 1000 duplex full autoneg off"



    ETHTOOL_OPTS="wol g speed 10000 duplex full autoneg off"  10G SPEED
    ETHTOOL_OPTS="wol g speed 1000 duplex full autoneg off"    1G SPEED
    ETHTOOL_OPTS="wol g speed 100 duplex full autoneg off"      100MB SPEED



2. 임시적으로 설정
     ethtool -s eth0 speed 100 duplex full

   적용 Linux Version : Redhat Ent 5.x/6.x 계열