1. A fabric control circuit comprising: a register programmed with a quality of service (QoS) parameter during use; and a multiplexor coupled to the register and coupled to receive a portion of a first interface on which the QoS parameter is transmitted during use, wherein an output of the multiplexor is coupled to the portion of a second interface on which the QoS parameter is transmitted during use, wherein the fabric control circuit is configured to select between the QoS parameter in the register and the received QoS parameter through the multiplexor to transmit as the QoS parameter on the second interface.