config switch_vlan
      option device 'switch0'
      option vlan '1'
      option ports '5t 0 1'

config switch_vlan
      option device 'switch0'
      option vlan '2'
      option ports '4 6'

config switch_vlan
      option device 'switch0'
      option vlan '3'
      option ports '5t 2 3'