i have wan and wanb on the zyxel 6617, now i want create anothert wan, how i should do that? that's my config
config interface 'wan'
option ifname 'eth1'
option proto 'dhcp'
option metric '10'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option vid '1'
option ports '0 2 3 4'
config switch_vlan
option device 'switch0'
option vlan '2'
option vid '2'
option ports '0t 1 5'
config interface 'wanb'
option ifname 'eth0.2'
option proto 'dhcp'
option metric '20'