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