hi!
Rate-limiting is the same as policing.Actually rate-limiting using MQC is policing. Pilicing defines a strict cut-off and anything that crosses the cutoff- is dropped. Shaping on the other hand queues the excess traffic. So it can be helpful; for bursty traffic but if traffic comes at a higher rate continuously, the excess packets will be tail dopped in the queue and will have same effect as policing.
Shaping is usually a egress feature, and service-provider will usually resort to policing on the ingress ports.
Regards,
Niranjan
