I have CRS354-48G-4S+2Q+ switch and no traffic problem on ports 1-8. You must add each port to Marvell chip so add "hw=yes" simple/sample config: /interface bridge add name=bridge pvid=8 vlan-filtering=no /interface ethernet set [ find default-name=qsfpplus1-1 ] advertise=1000M-half,1000M-...