868 | Quality of Servicew w w . d e l l . c o m | s u p p o r t . d e l l . c o m On the C-Series and S-Series all traffic is by default mapped to the same queue, Queue 0. If you honordot1p on ingress, then you can create service classes based the queueing strategy in Table 41-6 using thecommand service-class dynamic dot1p from INTERFACE mode. You may apply this queuing strategyglobally by entering this command from CONFIGURATION mode.• All dot1p traffic is mapped to Queue 0 unless service-class dynamic dot1p is enabled on an interface orglobally.• Layer 2 or Layer 3 service policies supersede dot1p service classes.Guaranteeing bandwidth to dot1p-based service queuesGuarantee a minimum bandwidth to queues globally from CONFIGURATION mode with the commandservice-class bandwidth-weight. The command is applied in the same way as the bandwidth-weightcommand in an output QoS policy (see Allocate bandwidth to queue on page 863). The bandwidth-weightcommand in QOS-POLICY-OUT mode supersedes the service-class bandwidth-weight command.Apply an input policy map to an interfaceApply an input policy map to an interface using the command service-policy input from INTERFACEmode. Specify the keyword layer2 if the policy map you are applying a Layer 2 policy map; in this case, theINTERFACE must be in switchport mode. You can apply the same policy map to multiple interfaces, andyou 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-stackaccess.• If you apply a service policy that contains an ACL to more than one interface, FTOS uses ACLoptimization to conserves CAM space. The ACL Optimization behavior detects when an ACL alreadyexists in the CAM and rather than writing it to the CAM multiple times.Create Output Policy MapsCreate Output Policy Maps is supported only on platform e1. Create an output policy map using the command policy-map-output from CONFIGURATION mode.2. Once you create an output policy map, do one or more of the following:• Apply an output QoS policy to a queue• Specify an aggregate QoS policy• Apply an output policy map to an interface3. Apply the policy map to an interface. See page 61.Apply an output QoS policy to a queueApply an output QoS policy to queues using the command service-queue from INTERFACE mode.
