Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 772

• Layer 2 or Layer 3 service policies supersede dot1p service classes. • Create service classes. INTERFACE mode service-class dynamic dot1p Guaranteeing Bandwidth to dot1p-Based Service Queues To guarantee bandwidth to dot1p-based service queues, use the following command. Apply this command in the same way as the bandwidth-percentage command in an output QoS policy (refer to Allocating Bandwidth to Queue). The bandwidth-percentage command in QOS-POLICY-OUT mode supersedes the service-class bandwidth-percentage command. • Guarantee a minimum bandwidth to queues globally. CONFIGURATION mode service-class bandwidth-percentage Applying an Input Policy Map to an Interface To apply an input policy map to an interface, use the following command. You can apply the same policy map to multiple interfaces, and you can modify a policy map after you apply it. • You cannot apply a class-map and QoS policies to the same interface. • You cannot apply an input Layer 2 QoS policy on an interface you also configure with vlan-stack access. • If you apply a service policy that contains an ACL to more than one interface, the system uses ACL optimization to conserve CAM space. The ACL optimization behavior detects when an ACL exists in the CAM rather than writing it to the CAM multiple times. • Apply an input policy map to an interface. INTERFACE mode service-policy input Specify the keyword layer2 if the policy map you are applying a Layer 2 policy map; in this case, INTERFACE mode must be in Switchport mode. Creating Output Policy Maps 1 Create an output policy map. CONFIGURATION mode policy-map-output 2 After you create an output policy map, do one or more of the following: Applying an Output QoS Policy to a Queue Specifying an Aggregate QoS Policy Applying an Output Policy Map to an Interface 3 Apply the policy map to an interface. Quality of Service (QoS) 772