Yep, pretty sure. m is for multicast. From arch wiki: d (disabled), p (PHY activity), u (unicast activity), m (multicast activity), b (broadcast activity), a (A

Yep, pretty sure. m is for multicast. From arch wiki: d (disabled), p (PHY activity), u (unicast activity), m (multicast activity), b (broadcast activity), a (ARP activity), g (magic packet activity)