Reference Guide

Configuring CoPP for CPU Queues
Controlling traffic on the CPU queues does not require ACL rules, but does require QoS policies.
CoPP for CPU queues converts the input rate from kbps to pps, assuming 64 bytes is the average packet size, and
applies that rate to the corresponding queue. Consequently, 1 kbps is roughly equivalent to 2 pps.
The basics for creating a CoPP service policy is to create QoS policies for the desired CPU bound queue and associate it
with a particular rate-limit. The QoS policies are assigned to a control-plane service policy for each port-pipe.
1. Create a QoS input policy for the router and assign the policing.
CONFIGURATION mode
qos-policy-input name cpu-qos
2. Create an input policy-map to assign the QoS policy to the desired service queues.l.
CONFIGURATION mode
policy-map--input name cpu-qos service-queue 0 qos-policy name
3. Enter Control Plane mode.
CONFIGURATION mode
control-plane-cpuqos
4. Assign a CPU queue-based service policy on the control plane in cpu-qos mode. Enabling this command sets the
queue rates according to those configured.
CONTROL-PLANE mode
service-policy rate-limit-cpu-queues name
Example of Creating the QoS Policy
FTOS#conf
FTOS(conf)#qos-policy-input cpuq_1
FTOS(conf-qos-policy-in)#rate-police 3000 40 peak 500 40
FTOS(conf-qos-policy-in)#exit
FTOS(conf)#qos-policy-input cpuq_2
FTOS(conf-qos-policy-in)#rate-police 5000 80 peak 600 50
FTOS(conf-qos-policy-in)#exit
Example of Assigning the QoS Policy to the Queues
FTOS(conf)#policy-map-input cpuq_rate_policy cpu-qos
FTOS(conf-qos-policy-in)#service-queue 5 qos-policy cpuq_1
FTOS(conf-qos-policy-in)#service-queue 6 qos-policy cpuq_2
FTOS(conf-qos-policy-in)#service-queue 7 qos-policy cpuq_1
Example of Creating the Control Plane Service Policy
FTOS#conf
FTOS(conf)#control-plane
FTOS(conf-control-plane)#service-policy rate-limit-cpu-queues cpuq_rate_policy
Show Commands
The following section describes the CoPP show commands.
To view the rates for each queue, use the show cpu-queue rate cp command.
Example of Viewing Queue Rates
FTOS#show cpu-queue rate cp
Service-Queue Rate (PPS)
233