Waterfall granting may be provided. First, a plurality of grants may be received for a service flow. Then a first plurality of packets may be placed in a first queue associated with the service flow in response to determining that the first plurality of packets corresponding to the service flow are associated with a first quality of service level. Next, a second plurality of packets may be placed in a second queue associated with the service flow in response to determining that the second plurality of packets corresponding to the service flow are associated with a second quality of service level. The first plurality of packets in the first queue may then be serviced from the plurality of grants until all the first plurality of packets in the first queue are serviced before servicing any of the second plurality of packets in the second queue with remaining ones of the plurality of grants.