Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 431
Apply an Input Policy Map to an Interface, Create Output Policy Maps
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Mapping dot1p Values to Service Queues All traffic is, by default, mapped to the same queue, Queue 0. If you honor dot1p on ingress, you can create service classes based the queueing strategy in Table 24-4 using the service-class dynamic dot1p command from INTERFACE mode. Apply this queuing strategy globally by entering this command from CONFIGURATION mode. • All dot1p traffic is mapped to Queue 0 unless you enable the service-class dynamic dot1p command on an interface or globally. • Layer 2 or Layer 3 service policies supersede dot1p service classes. Guaranteeing Bandwidth to dot1p-Based Service Queues To guarantee a minimum bandwidth to queues globally from CONFIGURATION mode, use the service-class bandwidth-weight command. The command is applied in the same way as the bandwidth-weight command in an output QoS policy (refer to Allocate Bandwidth to the Queue). The bandwidth-percentage command in QOS-POLICY-OUT mode supersedes the service-class bandwidth-weight command. Apply an Input Policy Map to an Interface To apply an input policy map to an interface, use the service-policy input command from INTERFACE mode. Specify the keyword layer2 if the policy map you are applying is a Layer 2 policy map; in this case, the INTERFACE must be in Switchport mode. You can apply the same policy map to multiple interfaces, and you can modify a policy map after you apply it. • You cannot apply an input Layer 2 QoS policy on an interface you also configure with the vlan-stack access command. • If you apply a service policy that contains an ACL to more than one interface, FTOS uses ACL optimization to conserves CAM space. (See CAM Optimization for details) Create Output Policy Maps 1. To create an output policy map, use the policy-map-output command from CONFIGURATION mode. 2. After 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 Interface 3. Apply the policy map to an interface. Apply an Output QoS Policy to a Queue To apply an output QoS policy to queues, use the service-queue command from INTERFACE mode. Specify an Aggregate QoS Policy To specify an aggregate QoS policy, use the policy-aggregate command from POLICY-MAP-OUT mode. Quality of Service (QoS) | 429
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