Dell EMC SmartFabric OS10 User Guide Release 10.5.0

Rate-limiting the protocol CPU queues requires configuring control-plane type QoS policies.

• Create QoS policies, class maps and policy maps, for the desired CPU-bound queue.
• Associate the QoS policy with a particular rate-limit.
• Assign the QoS service policy to control plane queues.

By default, the peak information rate (pir) and committed information rate (cir) values are in packets per second (pps) for control plane. CoPP for CPU queues converts the input rate from kilobits per second (kbps) to packets per second (pps), assuming 64 bytes is the average packet size, and applies that rate to the corresponding queue – One kbps is roughly equivalent to two pps.

1. Create a control-plane type class-map and configure a name for the class-map in CONFIGURATION mode.

   class-map type control-plane example-copp-class-map-name

2. Return to CONFIGURATION mode.

   exit

3. Create an input policy-map to assign the QoS policy to the desired service queues in CONFIGURATION mode.

   policy-map type control-plane example-copp-policy-map-name

4. Associate a policy-map with a class-map in POLICY-MAP mode.

   class example-copp-class-map-name

5. Configure marking for a specific queue number in POLICY-MAP-CLASS-MAP mode. Use the show control-plane info command to view the list of control-plane queues.

   set qos-group queue-number

6. Configure rate policing on incoming traffic in POLICY-MAP-CLASS-MAP mode.

   police {cir committed-rate | pir peak-rate}

   • cir committed-rate—Enter a committed rate value in pps, from 0 to 4000000.
   • pir peak rate — Enter a peak-rate value in pps, from 0 to 40000000.

OS10(config)# class-map type control-plane example-copp-class-map-name
OS10(config-cmap-control-plane)# exit
OS10(config)# policy-map type control-plane example-copp-policy-map-name
OS10(config-pmap-control-plane)# class example-copp-class-map-name
OS10(config-pmap-c)# set qos-group 2
OS10(config-pmap-c)# police cir 100 pir 100

OS10(config)# do show policy-map
Service-policy (control-plane) input: example-copp-policy-map-name
  Class-map (control-plane): example-copp-class-map-name
    set qos-group 2
    police cir 100 bc 100 pir 100 be 100