wan+vlan

 /int bridge add name=br-wan vlan-filtering=yes auto-mac=no admin-mac=[/int ethernet get [find name=ether1] mac-address ]

 /int bridge port remove [find interface=ether1]
 /int bridge port remove [find interface=ether5]

 /int bridge port add bridge=br-wan interface=ether1
 /int bridge port add bridge=br-wan interface=ether5 pvid=555

 /int bridge vlan add bridge=br-wan vlan-ids=555 tagged=br-wan,ether1

 /int vlan add vlan-id=555 name=br-wan.555 interface=br-wan