While researching the Catalyst QoS chapter of the latest IPexpert book The Operation and Troubleshooting of QoS, I discovered that there are many incorrect blog posts out there regarding the configuration of traffic policing on a switched virtual interface (SVI). The purpose of this post is to provide the correct configuration and some supporting commentary. Big thanks to upcoming IPexpert instructor Kevin Wallace for this clear and direct video on the topic during our CCIE Lab Fundamentals course where he was one of our prized Guest Speakers.
As you know, policing sets a “speed limit” for traffic that is entering or exiting the Catalyst switch. Traffic that is not exceeding the speed limit is termed the conforming traffic. Traffic that is exceeding the speed limit is termed the exceeding traffic.