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# Configuring Strict-Priority Scheduling

To configure strict-priority scheduling:

1. Configure the traffic classes.
   `
   host1(config)#traffic-class Low-loss-1
   host1(config-traffic-class)#exit
   host1(config)#traffic-class Low-latency-1
   host1(config-traffic-class)#exit
   host1(config)#traffic-class Low-latency-2
   host1(config-traffic-class)#exit
   `
2. Configure the auto-strict-priority traffic-class group, and add the traffic classes that must receive strict-priority scheduling to the group.
   `
   host1(config)#traffic-class-group Strict-priority auto-strict-priority
   host1(config-traffic-class-group)#traffic-class Low-latency-1
   host1(config-traffic-class-group)#traffic-class Low-latency-2
   host1(config-traffic-class-group)#exit
   `
3. Create a scheduler profile for strict-priority traffic and configure the shaping rate.
   `
   host1(config)#scheduler-profile strictPriorityBandwidth
   host1(config-scheduler-profile)#shaping-rate 20000000
   host1(config-scheduler-profile)#exit
   `
4. Configure a QoS profile.
   `
   host1(config)#qos-profile Example-qos-profile
   host1(config-qos-profile)#atm group default
   host1(config-qos-profile)#atm group Strict-priority scheduler-profile strictPriorityBandwidth
   host1(config-qos-profile)#atm-vc node group default
   host1(config-qos-profile)#atm-vc node group Strict-priority
   host1(config-qos-profile)#atm-vc queue traffic-class best-effort
   host1(config-qos-profile)#atm-vc queue traffic-class Low-loss-1
   host1(config-qos-profile)#atm-vc queue traffic-class Low-latency-1
   host1(config-qos-profile)#atm-vc queue traffic-class Low-latency-2
   host1(config-qos-profile)#exit
   `
5. Attach the QoS profile to an interface.
   `
   host1(config)#interface atm 2/0
   host1(config-if)#qos-profile Example-qos-profile
   host1(config-if)#exit
   host1(config)#
   `

This configuration creates the hierarchy shown in Figure 15.

Figure 15: Sample Strict-Priority Scheduling Hierarchy

#### Related Topics

- Strict-Priority and Relative Strict-Priority Scheduling Overview
- For more information about specifying an expression that you can reference within a scheduler profile, see Using Expressions for Bandwidth and Burst Values in a Scheduler Profile
- group command
- node command
- qos-profile command
- queue command
- scheduler-profile command
- shaping-rate command
- strict-priority command
- traffic-class command
- traffic-class-group command

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