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Committed Access Rate Limiting

Written by Nick on . Posted in Quality of Service (QOS)

Scenario:

A host on your network has been surfing the web and transfers files far too much. Your boss is old school and does not like class-based QoS nor MQC. You have to find a way to police traffic from that host before it cripples your network!

Goal:

  • Nothing has been preconfigured for you!
  • Make the proper physical connections as outlined in the diagram.
  • The bandwidth between R1 and R2 is 496 kbps. Configure this.
  • Add a static default route onto both R1 and R3 as they represent hosts.
  • Ensure you have IP connectivity from R1 to R3 before continuing.
  • Without using MQC or CB Policing, police traffic from R1, configured on R2 as follows. Bc should be equal to the CIRs:
  • Police all traffic to 496 kbps, dropping all exceeding traffic. Before this traffic is forwarded, apply the additional policing ...
  • Police web traffic at 400 kbps, dropping all exceeding traffic.
  • Police FTP traffic at 160 kbps, dropping all exceeding traffic.
  • Police ICMP traffic at 200 kbps, dropping all exceeding traffic.

IOS:

c3725-adventerprisek9-mz.124-7.image

Topology:

car rate limit