OpenWrt /etc/config/network

network

config interface 'loopback'
	option ifname 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config interface 'lan1'
	option ifname 'eth0.1'
	option proto 'static'

config interface 'lan2'
	option ifname 'eth0.2'
	option proto 'static'

config interface 'lan3'
	option ifname 'eth0.3'
	option proto 'static'

# Console port 
config interface 'lan4'
	option ifname 'eth0.4'
	option proto 'static'
	option ipaddr '192.168.1.1'
        option netmask '255.255.255.0'

config interface 'lan5'
	option ifname 'eth0.5'
	option proto 'static'

config switch
	option name 'switch0'
	option reset '1'
	option enable_vlan '1'

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option ports '0t 1'

config switch_vlan
	option device 'switch0'
	option vlan '2'
	option ports '0t 2'

config switch_vlan
	option device 'switch0'
	option vlan '3'
	option ports '0t 3'

config switch_vlan
	option device 'switch0'
	option vlan '4'
	option ports '0t 4'

config switch_vlan
	option device 'switch0'
	option vlan '5'
	option ports '0t 5'