Cisco 10000 Series User Manual

4-24
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 4 Attaching Service Policies
Attaching Virtual Access Interface QoS Service Policies
The virtual template interface is a logical entity that the router applies dynamically as needed to a
connection. It is a configuration for an interface, but it is not tied to the physical interface. The VAI uses
the attributes of the virtual template to create the session, which results in a VAI that is uniquely
configured for a specific user.
After you configure a virtual template, configure the virtual connection that will use the template and
then apply the template to the virtual connection. The order in which you create virtual templates and
configure the virtual connections that use the templates is not important. However, before a remote user
initiates a session to the router, both the virtual templates and connections must exist.
If you use a RADIUS server, the RADIUS configuration takes precedence over the virtual template
configuration. For example, the RADIUS configuration might override some parameters and the virtual
template provides the remainder of the configuration.
Note Virtual template interfaces and VAIs do not apply to routed bridge encapsulation (RBE) over ATM.
For more information about virtual templates and VAIs, see the Cisco 10000 Series Broadband
Aggregation and Leased-Line Configuration Guide at:
http://www.cisco.com/en/US/products/hw/routers/ps133/products_configuration_guide_book0918
6a00804d45ca.html
This section describes the following topics:
• Feature History for VAI QoS, page 4-24
• VAI QoS Inheritance, page 4-24
• Restrictions and Limitations for Attaching QoS Services to a VAI, page 4-25
• Attaching QoS Policies to VAIs Using Virtual Template Interfaces, page 4-25
Feature History for VAI QoS
VAI QoS Inheritance
When you apply a QoS service policy to a virtual circuit (VC), the virtual access interfaces (VAIs) that
use that VC inherit the QoS policy of the VC. Any VAI that uses that VC is subject to the queueing,
policing, and marking actions defined in the VC service policy.
Cisco IOS Release Description Required PRE
12.0(25)SX The attachment of VAI QoS service policies feature was
introduced on the router.
PRE1
12.2(15)BX This feature was introduced on the PRE2. PRE2
12.2(28)SB This feature was integrated in Cisco IOS
Release
12.2(28)SB for the PRE2.
PRE2
12.2(31)SB2 This feature was introduced on the PRE3. PRE2
PRE3

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English