diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index f8baa897d1a0e48b39f2d628ce36bfc2ef73ca08..1f7dd927cc5ea4777530a8ba23daae631f258bf9 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -2051,6 +2051,8 @@ static int mv88e6xxx_setup_port(struct dsa_switch *ds, int port)
 				reg |= PORT_CONTROL_FRAME_ETHER_TYPE_DSA;
 			else
 				reg |= PORT_CONTROL_FRAME_MODE_DSA;
+			reg |= PORT_CONTROL_FORWARD_UNKNOWN |
+				PORT_CONTROL_FORWARD_UNKNOWN_MC;
 		}
 
 		if (mv88e6xxx_6352_family(ds) || mv88e6xxx_6351_family(ds) ||