852 | 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 mPort-based QoS ConfigurationsYou can configure the following QoS features on an interface:• Set dot1p Priorities for Incoming Traffic on page 852• Configure Port-based Rate Policing on page 854• Configure Port-based Rate Limiting on page 855• Configure Port-based Rate Shaping on page 856• Broadcast Storm Control on page 1043Set dot1p Priorities for Incoming TrafficChange the priority of incoming traffic on the interface using the command dot1p-priority fromINTERFACE mode, as shown in Figure 41-2. FTOS places traffic marked with a priority in a queue basedon Table 41-2. If you set a dot1p priority for a port-channel, all port-channel members are configured withthe same value. You cannot assign a dot1p value to an individual interfaces in a port-channel.Figure 41-2. Configuring dot1p Priority on an InterfaceFTOS Behavior: The C-Series and S-Series distribute eight dot1p priorities across four data queues.This is different from the E-Series, which distributes eight dot1p priorities across eight queues(Table 41-2).Table 41-2. dot1p-priority values and queue numbersdot1pE-SeriesQueueNumberC-SeriesQueueNumberS-SeriesQueueNumber0 2 1 11 0 0 02 1 0 03 3 1 14 4 2 25 5 2 26 6 3 37 7 3 3FTOS#configFTOS(conf)#interface gigabitethernet 1/0FTOS(conf-if)#switchportFTOS(conf-if)#dot1p-priority 1FTOS(conf-if)#endFTOS#
