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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 24 Configuring QoS
Understanding QoS
Router(config-pmap-c)# exit
Router(config-pmap)# class out-class2
Router(config-pmap-c)# bandwidth remaining percent 50
Router(config-pmap-c)# exit
Router(config-pmap)# class out-class3
Router(config-pmap-c)# bandwidth remaining percent 20
Router(config-pmap-c)# exit
Router(config-pmap)# exit
Router(config)# interface gigabitethernet 0/1
Router(config-if)# service-policy output policy1
Router(config-if)# exit
This example shows how to use the priority with percent commands to configure out-class1 as the
priority queue, with traffic going to the queue limited to 20000000 bps so that the priority queue will
never use more than that. Traffic above that rate is dropped. The other traffic queues are configured to
use 50 and 20 percent of the bandwidth that is left, as in the previous example.
Router(config)# policy-map policy1
Router(config-pmap)# class out-class1
Router(config-pmap-c)# priority percent 20
Router(config-pmap-c)# exit
Router(config-pmap)# class out-class2
Router(config-pmap-c)# bandwidth percent 50
Router(config-pmap-c)# exit
Router(config-pmap)# class out-class3
Router(config-pmap-c)# bandwidth percent 20
Router(config-pmap-c)# exit
Router(config-pmap)# exit
Router(config)# interface gigabitethernet 0/1
Router(config-if)# service-policy output policy1
Router(config-if)# exit
The following example shows how to use the priority with percent commands to configure multiple
traffic classes:
Router(config)# policy-map pmap_bckbone
Router(config-pmap)# class VOICE_GRP
Router(config-pmap-c)# priority percent 50
Router(config-pmap-c)# exit
Router(config-pmap)# class CTRL_GRP
Router(config-pmap-c)# priority percent 5
Router(config-pmap-c)# exit
Router(config-pmap)# class E1_GRP
Router(config-pmap-c)# priority percent 55
Router(config-pmap-c)# exit
Router(config-pmap)# class class-default
Router(config-pmap-c)# bandwidth percent 10
Router(config-pmap-c)# exit
Router(config-pmap)# exit
Ingress and Egress QoS Functions
This section lists the supported and unsupported qos functions for ingress and egress.
Ingress QoS Functions
In Cisco ASR 901 router:
• Interfaces support ingress classification.
• Ethernet interfaces support ingress policing.