Cisco 10000 Series User Manual

21-4
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 21 VLAN Tag-Based Quality of Service
VLAN Tag-Based QoS
System Limits for VLAN Tag-Based QoS
Table 21-1 lists the system limits for VLAN tag-based QoS.
Statistical Information for VLAN-Group Policies and Classes
The router displays packet statistics for VLAN-group policies using the modular QoS command-line
interface (MQC) show commands. Statistical information displayed for VLAN groups represents the
aggregate traffic of all of the subinterface members of the specific VLAN group.
The router updates match-VLAN filter statistics only for the aggregate traffic through the VLAN groups.
VLAN Tag-Based QoS on the PRE2 and PRE3
Table 21-2 describes support for various features on the PRE2 and PRE3 when configured with the
QoS—VLAN Tag-Based feature.
Ta b l e 21-1 System Limits for VLAN Tag-Based QoS
Class Maps
per Policy Map
1
1. Excludes the class-default class map.
VLAN Groups
per VLAN-Group Policy
Total Number Class Maps
per VLAN-Group Policy
2
2. Includes the class maps configured for child policies applied to each match-VLAN class and includes the class-default class
of the VLAN-group policy.
255 255 64
Ta b l e 21-2 VLAN Tag-Based QoS on the PRE2 and PRE3
Feature PRE2 PRE3
Aggregate priority queues Not supported Supported.
Aggregate priority queues should be well within
90% of the maximum rate to guarantee
performance.
Aggregate WRED Not supported Supported
Allows a maximum of 8 profiles per class and a
total of 21 profiles in a policy.
Bandwidth remaining ratio Not supported Supported at the parent level of VLAN QoS
policies.
VLAN-group policies Supports simultaneous VLAN-group policy
and subinterface policies that are not part of
the VLAN-group policy.
Does not support both VLAN-group policies and
subinterface policies on the same link
simultaneously.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English