To consult, so what is the principle and process of?
System use ifconfig - a view, how to make four LAN mouth eth1, for eth2, eth3, eht4;
And can be set respectively the four IP address?
And eth1.1 eth1.2 eth1.3, eth1.4 what is this principle, can set the IP address of the 4 for different?
If the four ports are bound to the vlan, that should be how to set up the port?

Feel this process it is quite complicated, don't like driving to do,