Не совсем понял. wan - загнать в бридж?
например
/interface bridge
add name=bridge1 vlan-filtering=yes
/interface vlan
add comment=wan interface=bridge1 name=wan vlan-id=10
add comment=lan interface=bridge1 name=lan vlan-id=100
# add comment=HotSpot interface=bridge1 name=vlan1624 vlan-id=1624
/interface bridge port
add bridge=bridge1 interface=ether1 pvid=10 frame-types=admit-all
add bridge=bridge1 interface=ether2 pvid=100
add bridge=bridge1 interface=ether3 pvid=100
add bridge=bridge1 interface=ether4 pvid=100
add bridge=bridge1 interface=ether5 pvid=100
add bridge=bridge1 interface=ether6 pvid=100
add bridge=bridge1 interface=ether7 pvid=100
add bridge=bridge1 interface=ether8 pvid=1624
/interface bridge vlan
add bridge=bridge1 tagged=bridge1 untagged=ether1 vlan-ids=10
add bridge=bridge1 tagged=bridge1 untagged=ether2,ether3,ether4,ether5,ether6,ether7 vlan-ids=100
add bridge=bridge1 tagged=ether1 untagged=ether8 vlan-ids=1624