/interface ethernet
set [ find default-name=ether7 ] master-port=ether6
set [ find default-name=ether8 ] master-port=ether6
set [ find default-name=ether9 ] master-port=ether6
set [ find default-name=ether10 ] master-port=ether6
[admin@MikroTik] /interface ethernet> ..
[admin@MikroTik] /interface> exp
jan/06/2017 14:55:57 by RouterOS 6.38
software id = 1VTU-WHJF
/interface bridge
add admin-mac=6C:3B:6B:20:13:BD auto-mac=no name=lan
/interface ethernet
set [ find default-name=ether7 ] master-port=ether6
set [ find default-name=ether8 ] master-port=ether6
set [ find default-name=ether9 ] master-port=ether6
set [ find default-name=ether10 ] master-port=ether6
/interface bridge port
add bridge=lan interface=ether6
add bridge=lan interface=ether5
add bridge=lan interface=ether4
add bridge=lan interface=ether3
ether3,4,5 will recv traffic at ether6,7,8,9.if ether6,7,8,9 use 10m,10m,5m,5m.ether3,4,5 will recv 30M at the same time.