A method, apparatus, and computer-readable media comprise storing in a first buffer data received from a network device; sending the data from the first buffer to a second buffer in response to status signals asserted by the second buffer, wherein the second buffer stores the data, and wherein the status signals asserted by the second buffer indicate an amount of the data in the second buffer; and sending flow-control signals to the network device based on the status signals asserted by the second buffer, thereby causing the network device to regulate the amount of the data sent from the network device in response to the flow-control signals.