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Thursday, June 16, 2011

ME3400 configuraion- what is the difference between police and rate-limit

While configuring an ME3400 for the first time, we noticed that the physical interfaces offer the ability to enter a 'rate-limit' command. There is also the option to configure policing within a 'policy-map' and attach that to an interface using the 'service-policy' command. What is the difference between the two, if any? If there is no difference, then why does 'rate-limit' offer more flexible BC options (1000-512000000) than the policy-map 'police' option which imposes a 1Mb burst limitation?

Cisco recommends using the modular QoS CLI features when possible to implement quality of service in your network. Use class-based policing through the police command in a service policy to implement rate limiting without buffering or queuing. Avoid using CAR, for which no new features or functionality is planned.

Please click here for more information on comparing Class-Based Policing and Committed Access Rate

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