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vconfig add eth0 100 
vconfig add eth0 300
vconfig add eth1 100
vconfig add eth1 200
vconfig add eth1 300
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ifconfig eth0.100 up
ifconfig eth0.200 up
ifconfig eth0.300 up
ifconfig eth1.100 up
ifconfig eth1.200 up
ifconfig eth1.300 up
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brctl addbr br0
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brctl addif br0 eth0.100
brctl addif br0 eth0.200
brctl addif br0 eth0.300
brctl addif br0 eth1.100
brctl addif br0 eth1.200
brctl addif br0 eth1.300
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