A service provider offers an Ethernet access customer a 100 Mbps CIR on a physical port that runs at 1 Gbps. The customer complains that their TCP-based file transfers experience frequent retransmissions and poor throughput during bursts, even though average utilization is well below 100 Mbps. The SP currently applies an egress policer that drops all traffic exceeding 100 Mbps. What change should the SP engineer make to improve the customer's TCP performance while still enforcing the 100 Mbps rate?