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• Configuring Strict-Priority Scheduling    

• 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
• node
• qos-profile
• queue
• scheduler-profile
• shaping-rate
• strict-priority
• traffic-class
• traffic-class-group

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 1.

Figure 1: Sample Strict-Priority Scheduling Hierarchy