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Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 4 Attaching Service Policies
Attaching Layer 2 Access Concentrator QoS Service Policies
•
If you attach service policies to both the Ethernet 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 LAC QoS
•
Cisco IOS Release 12.3(7)XI3 does not support the attachment of LAC QoS directly to sessions by
attaching QoS services to a virtual access interface (VAI) using a virtual template. If you apply LAC
QoS to a virtual template, the router ignores it.
•
On ATM line cards, you can apply a policy map to the physical interface, point-to-point
subinterfaces, and to individual PVCs. The router does not support applying QoS service policies to
point-to-multipoint interfaces. However, you can apply service policies to VCs that are on
multipoint interfaces.
•
The policy map you assign to an ATM PVC takes precedence over the policy map you assign to the
main interface.
•
You must first configure the
atm pxf queuing
command on the ATM interface and then attach the
policy map.
Note
Do not change the queuing mode while VCs are configured on the interface. If you must change
the mode, first delete the VCs and then change the mode. Changing the mode while VCs are
configured can produce undesired results, and the change does not take effect until the router
reloads.
•
The aggregate bandwidth of the classes configured in a policy map is limited to the speed of the
interface or subinterface to which it is applied. The aggregate bandwidth of a policy applied to a VC
is limited to the capacity of the port, unless you configure oversubscription by using the
atm over-subscription-factor
command.
•
The router does not support a service policy based on queueing for unshaped UBR PVCs.
•
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. In a PPPoE over Ethernet configuration,
you cannot attach a service policy to a subinterface if another service policy is already attached to
its main interface.
•
The Fast Ethernet port (fe0/0/0) of the performance routing engine (PRE) does not support PPPoE
over Ethernet. This port is for management traffic only.
•
Output QoS policies that contain queueing actions must be hierarchical service policies. For more
information, see
Chapter 13, “Defining QoS for Multiple Policy Levels.”
Attaching QoS Policies to LAC ATM Virtual Circuits
You can attach QoS policies to ATM virtual circuits on the LAC. For information about how to do this,
see the
“Attaching QoS Service Policies to an ATM PVC” section on page 4-8
.
