/interface bridge add name=bridge1 vlan-filtering=yes
/interface vlan add interface=bridge1 name=vlan7 vlan-id=7
/interface bridge port add bridge=bridge1 interface=ether1 pvid=101
/interface bridge port add bridge=bridge1 interface=ether2 pvid=102
/interface bridge port add bridge=bridge1 interface=ether3 pvid=7
/interface bridge vlan add bridge=bridge1 tagged=ether2 untagged=ether1 vlan-ids=101
/interface bridge vlan add bridge=bridge1 tagged=ether3 vlan-ids=102
/interface bridge vlan add bridge=bridge1 tagged=bridge1 vlan-ids=7
/ip address add address=
10.7.0.2/24 interface=vlan7 network=
10.7.0.0но как сказал
@jscar смотрите на ньюансы