/interface bridge port
add bridge=bridge1 interface=ether3 pvid=2
add bridge=bridge1 interface=ether4 pvid=3
/interface bridge vlan
add bridge=bridge1 tagged=ether2 untagged=ether3 vlan-ids=2
add bridge=bridge1 tagged=ether2 untagged=ether4 vlan-ids=3
/interface bridge set bridge1 vlan-filtering=yes