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Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 1 Quality of Service Overview
QoS Features, Commands, and Changes
Hierarchical Queuing Framework
Documentation Reference:
Chapter 22, “Hierarchical Scheduling and Queuing”
•
Hierarchical Queuing Framework Feature, page 1-27
•
MQC Hierarchical Queuing with 3 Level Scheduler, page 1-27
•
, page 1-27
Hierarchical Queuing Framework Feature
Cisco IOS Release:
Release 12.2(31)SB2
Description:
The Hierarchical Queuing Framework (HQF) feature was introduced on the PRE3 to define
a QoS architecture for implementing hierarchical packet scheduling and queuing. The HQF enables
service providers to manage their QoS at three layers of hierarchy: physical, logical, and class.
MQC Hierarchical Queuing with 3 Level Scheduler
Cisco IOS Release:
Release 12.2(31)SB2
Description:
The MQC Hierarchical Queuing with 3 Level Scheduler feature provides a flexible packet
scheduling and queuing system in which you can specify how excess bandwidth is to be allocated among
the subscriber queues and logical interfaces. Rather than allocating an implicit minimum bandwidth
guarantee to each queue, the three-level scheduler uses the bandwidth-remaining ratio parameter to
allocate unused bandwidth to each logical queue.
Hierarchical Policies
Documentation Reference:
Chapter 13, “Defining QoS for Multiple Policy Levels”
•
Nested Hierarchical Policies, page 1-27
•
Three-Level Hierarchical Policies, page 1-28
•
Hierarchical Input Policing, page 1-28
Nested Hierarchical Policies
Cisco IOS Release:
Release 12.0(22)S
Description:
The nested hierarchical policies feature was introduced on the PRE1. This feature defines
a minimum bandwidth for the multiple classes and a combined maximum bandwidth for the classes. This
feature supports two-level hierarchical policies.
Cisco IOS Release:
Release 12.2(16)BX
Description:
This feature was introduced on the PRE2.
Cisco IOS Release:
Release 12.2(28)SB
Description:
This feature was integrated in Cisco IOS Release 12.2(28)SB.
