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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Configuring Bandwidth Allocation for DCBx CIN

After you apply an ETS output policy to an interface, if the DCBx version used in your data center network is CIN, you may need to configure a QoS output policy to overwrite the default CIN bandwidth allocation.

This default setting divides the bandwidth allocated to each port queue equally between the dot1p priority traffic assigned to the queue.

For more information, refer to Allocating Bandwidth to Queue .

To create a QoS output policy that allocates different amounts of bandwidth to the different traffic types/ dot1p priorities assigned to a queue and apply the output policy to the interface, follow these steps.

  1. Create a QoS output policy. CONFIGURATION mode Dell(conf)#qos-policy-output test12 The maximum 32 alphanumeric characters.
  2. Configure the percentage of bandwidth to allocate to the dot1p priority/queue traffic in the associated L2 class map. QoS OUTPUT POLICY mode Dell(conf-qos-policy-out)#bandwidth-percentage 100 The default is none.
  3. Repeat Step 2 to configure bandwidth percentages for other priority queues on the port. QoS OUTPUT POLICY mode Dell(conf-qos-policy-out)#bandwidth-percentage 100
  4. Create a priority group for strict-priority scheduling. QoS OUTPUT POLICY mode Dell(conf-qos-policy-out)#scheduler strict
    • NOTE: You can not use scheduler strict when bandwidth percentage is configured. It displays an error message. 
      Dell(conf-qos-policy-out)#bandwidth-percentage 100 
                                             Dell(conf-qos-policy-out)#scheduler strict 
                                             % Error: Strict priority scheduler mode is not allowed when bandwidth-percentage is configured on qos-policy-output profile.
                                             Dell(conf-qos-policy-out)#scheduler strict  ?
  5. Exit QoS Output Policy Configuration mode. QoS OUTPUT POLICY mode Dell(conf-if-te-0/1)#exit
  6. Enter INTERFACE Configuration mode. CONFIGURATION mode Dell(conf-qos-policy-out)#int te 0/1
  7. Apply the QoS output policy with the bandwidth percentage for specified priority queues to an egress interface. INTERFACE mode Dell(conf-if-te-0/1)#service-policy output test12

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