This is default, all storage related layer 2 packets are flagged with COS4 (ONTAP sets the QoS priority bit to 4 for all tagged packets) Feature Request 1098263 has been created to change this behavio...This is default, all storage related layer 2 packets are flagged with COS4 (ONTAP sets the QoS priority bit to 4 for all tagged packets) Feature Request 1098263 has been created to change this behaviour (making it configurable) Cisco describes a switch based method to remark the packets with COS0. Please contact NetApp Technical Support or log into the NetApp Support Site to create a case to get your request added as a vote to the enhancement request.