4-21
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 4 Attaching Service Policies
Attaching Virtual LAN QoS Service Policies
VLAN QoS Inheritance
The following describes how VLAN traffic inherits QoS policies:
• 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.
Restrictions and Limitations for Attaching QoS Services to VLAN Subinterfaces
• 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
only.
• 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 Policies to VLAN Interfaces and Subinterfaces
To attach QoS service policies to VLAN interfaces and subinterfaces, perform any of the following
configuration tasks:
• Attaching QoS Service Policies to Physical Interfaces with VLAN Subinterfaces, page 4-22
• Attaching QoS Service Policies to VLAN Subinterfaces, page 4-23
To Next Page
Loading...
Need help?
General
