Vlan Qos Inheritance; Restrictions And Limitations For Attaching Qos Services To Vlan Subinterfaces; Attaching Qos Policies To Vlan Interfaces And Subinterfaces - Cisco 10000 Series Configuration Manual

Quality of service configuration guide

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Attaching Service Policies

VLAN QoS Inheritance

The following describes how VLAN traffic inherits QoS policies:

To attach QoS service policies to VLAN interfaces and subinterfaces, perform any of the following

configuration tasks:

If you attach a service policy only to the physical interface, the aggregate of all of the VLAN

subinterfaces is subject to the physical interface's service policy.

If you attach a service policy only to individual VLAN subinterfaces and not to the physical

interface, only the individual VLAN subinterfaces are subject to the attached service policies.

If you attach service policies to both the physical interface and to individual VLAN subinterfaces,

the aggregate of all VLAN subinterfaces without a service policy is subject to the physical

interface's service policy, and all of the VLAN subinterfaces with a service policy are individually

subject to their attached service policies.

The Cisco 10000 series router currently supports PPPoE over IEEE 802.1Q VLAN on Gigabit

Ethernet and Fast Ethernet 8-port half-height line cards. The Fast Ethernet port (fe0/0/0) of the

performance routing engine (PRE) does not support this feature. This port is for management traffic

For PRE1 and PRE2, output QoS policies that contain queueing actions must be nested service

policies. However, for PRE3 and PRE4, there is no such restriction and thereby a flat queueing

policy can be directly attached to a VLAN subinterface.

Attaching QoS Service Policies to Physical Interfaces with VLAN Subinterfaces, page 4-22

Attaching QoS Service Policies to VLAN Subinterfaces, page 4-23

Cisco 10000 Series Router Quality of Service Configuration Guide

Attaching Virtual LAN QoS Service Policies

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