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set static ip

# ip addr add 192.168.0.100/22 dev eth0

del static IP

# ip addr del 192.168.0.100/22 dev eth0

del all IP

# ip addr flush dev eth0

set mtu

# ip link set dev eth0 mtu 9000

create a bridge

# brctl addbr br0
# brctl addif br0 eth0
# ip addr del 192.168.0.100/24 dev eth0
# ip link set up dev br0
# ip addr add 192.168.0.100/24 dev br0
# brctl show

set vf mac

# ip link set dev eth0 vf 0 mac 24:8a:07:55:46:f0 

http://maxubuntu.blogspot.com/search/label/Network