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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 24 Configuring QoS
Configuring Quality of Service (QoS)
policy-map cos-6
class cos-6
police rate percent 5
conform-action transmit
exceed-action drop
set mpls experimental imposition 4
interface GigabitEthernet0/3
no ip address
load-interval 30
negotiation auto
service instance 22 ethernet
encapsulation dot1q 22
rewrite ingress tag pop 1 symmetric
service-policy input cos-6
xconnect 2.2.2.2 22 encapsulation mpls
Configuring Congestion Management
The following sections describe how to configure congestion management on the Cisco ASR 901.
• Configuring Low Latency Queueing (LLQ)
• Configuring Multiple Priority Queueing
• Configuring Class-Based Weighted Fair Queuing (CBFQ)
• Weighted Random Early Detection (WRED)
Configuring Low Latency Queueing (LLQ)
Low latency queuing allows you to define a percentage of bandwidth to allocate to an interface or PVC
as a percentage. You can define a percentage for priority or nonpriority traffic classes.
Complete the following steps to configure LLQ.
Step 1 Enter enable mode.
Router> enable
Step 2 Enter the password.
Password:
password
When the prompt changes to Router, you have entered enable mode.
Step 3 Enter global configuration mode.
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Step 4 Use the policy-map command to define a policy map.
Router(config)# policy-map policy1
Step 5 Use the class command to reference the class map that defines the traffic to which the policy map
applies.
Router(config-pmap)# class class1
Router(config-pmap-c)#