Hi,
Under network QOS, you configure priority flow control, MTU and type of queuing. This is system wide.
On the interface, you can configure queuing policy inbound and outbound. F1 interfaces use COS value. You have 8 egress queues to service COS 0 to 7. You can configure the mimimum bandwidth of each queues on egress. The buffer allocated to each COS value is in the ingress policy because the output buffers are so small.
On top of that, you can add QOS(classification + marking) in inbound and outbound.