MQC Single Rate Three-Color Policer Example


You work for a large provider in India as a senior network engineer specialized in Quality of Service. All the customers of the service provider have an Ethernet connection which is capable of delivering speeds up to 10Mbps. The ISP has diffferent subscriptions and you need to enforce that customers only get what they are paying for…when traffic exceeds a certain rate you need to police it!


  • All IP addresses have been preconfigured for you.
  • Configure router Line to police all TELNET traffic heading for router Jack with the following configuration:
  • When traffic is less then 64Kbps the DSCP value should be set to AF21.
  • When traffic exceeds 64Kbps the DSCP value should be set to 0.
  • Traffic that is violating should be dropped.




Three level policer

Video Solution:

Configuration Files

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Written by René Molenaar - CCIE #41726

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About the Author: Rene Molenaar

René - CCIE #41726 is the creator of where he shares CCNA, CCNP and CCIE R&S labs. He also blogs about networking on


  1. Just FYI only – the CIR should be set to 512000, because the command requires bits and not kilobytes. I’ve heard on the CCIE test they will throw tricks in QoS that might interfere with EIGRP calculations.

    But, thanks Rene for the nice lab.

  2. Thanks Jelani for information, but when i change CIR into 512000 on Policy, when i ping from R1 to R4 with 18024 size, it`s not work, there all reply, but when i change CIR into 6400 again, and i ping with 1500 size, it`s work

    it just reply 3 times, and after that TimeOut, 3 x 1500 = 6400, but when i change to 512000 CIR, all the packet reply, i already change it into 1500 too, but same like before, all packet replying.

    Can you help me ?

    Thanks before 🙂

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