How To Configure Qos Congestion Management On Cisco Asr 9000 Series Routers; Configuring Guaranteed And Remaining Bandwidths - Cisco ASR 9000 Series Service Configuration Manual

Configuring Modular QoS Congestion Management on Cisco ASR 9000 Series Routers
How to Configure QoS Congestion Management on
Cisco ASR 9000 Series Routers
This section contains instructions for the following tasks:
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Configuring Guaranteed and Remaining Bandwidths

Guaranteed Service rate of a queue is defined as the bandwidth the queue receives when all the queues
are congested. It is defined as:
Guaranteed Service Rate = minimum bandwidth + excess share of the queue
The bandwidth command allows you to specify the minimum guaranteed bandwidth to be allocated for
a specific class of traffic. MDRR is implemented as the scheduling algorithm.
The bandwidth remaining command specifies a weight for the class to the MDRR. The MDRR
algorithm derives the weight for each class from the bandwidth remaining value allocated to the class.
The bandwidth remaining is divided among the classes in a policy using either bandwidth remaining
ratio or bandwidth remaining percent commands. If you do not configure the bandwidth remaining
command for any class, the leftover bandwidth is allocated equally to all classes for which bandwidth
remaining is not explicitly specified.
Restrictions
The amount of bandwidth configured should be large enough to also accommodate Layer 2 overhead.
The bandwidth command is supported only on policies configured on outgoing interfaces.
Configuring Guaranteed Bandwidth
SUMMARY STEPS
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OL-23108-02
Configuring Guaranteed and Remaining Bandwidths, page 51
Configuring Low-Latency Queueing with Strict Priority Queueing, page 57
Configuring Traffic Shaping, page 60
Configuring Traffic Policing, page 62
configure
policy-map policy-name
class class-name
bandwidth {rate [units] | percent percentage-value}
exit
class class-name
bandwidth {rate [units] | percent percentage-value}
exit
class class-name
bandwidth {rate [units] | percent percentage-value}
Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide

How to Configure QoS Congestion Management on Cisco ASR 9000 Series Routers

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