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Configuring CoPP for CPU Queues
This section describes how to create a queue-based CoPP service policy and apply it to control plane
traffic.
Controlling traffic on the CPU queues of the control plane does not require ACL rules; only QoS rate-
limiting policies are used.
To create a queue-based CoPP service policy, you must create a QoS input policy with rate-limiting,
associate it with a control-plane queue in a QoS policy map, and apply the complete queue-based rate
limiting configuration to control-plane traffic.
1. Create a QoS input policy and configure a rate limit.
CONFIGURATION mode
qos-policy-input name cpu-qos
rate-police [rate-kbps] [burst-kbytes] peak [rate-kbps] [burst-kbytes]
2. Create an input policy-map to assign the QoS rate-limit policy to a control-plane queue.
CONFIGURATION mode
policy-map-input name cpu-qos
service-queue queue-number qos-policy name
On the Z9500, the range of queue-number values is from 0 to 23. The twenty-four control–plane
queues are divided into groups of eight queues for the Route Processor, Control Processor, and line-
card CPUs as follows:
• Queues 0 to 7 process packets destined to the Control Processor CPU .
• Queues 8 to 15 process packets destined to the Route Processor CPU.
• Queues 16 to 23 process packets destined to the line-card CPU.
For information about the default rate limits applied to the eight CPU queues for the Route
Processor, Control Processor, and line cards, refer to Z9500 CoPP Implementation.
3. Enter Control Plane configuration mode.
CONFIGURATION mode
control-plane-cpuqos
4. Apply the QoS input policy-map with queue-based rate limiting on control plane traffic.
CONTROL-PLANE mode
service-policy rate-limit-cpu-queues input-policy-map
Examples of Configuring CoPP for CPU Queues
Example of Creating a QoS Policy to Configure the Rate Limit
Dell#conf
Dell(conf)#qos-policy-input cpuq_1 cpu-qos
Dell(conf-qos-policy-in)#rate-police 3000 40 peak 500 40
Dell(conf-qos-policy-in)#exit
Dell(conf)#qos-policy-input cpuq_2 cpu-qos
Dell(conf-qos-policy-in)#rate-police 5000 80 peak 600 50
Dell(conf-qos-policy-in)#exit
Control Plane Policing (CoPP)
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