Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 420

www.dell.com | support.dell.com Set dot1p Priorities for Incoming Traffic Change the priority of incoming traffic on the interface using the dot1p-priority command from INTERFACE mode (Figure 24-2). The Dell Force10 operating software (FTOS) places marked traffic in the corresponding queue as shown in Table 24-2. If you set a dot1p priority for a port-channel, all port-channel members are configured with the same value. You cannot assign a dot1p value to individual interfaces in a port-channel. FTOS Behavior: The MXL Switch distributes eight dot1p priorities across four data queues. Table 24-2. dot1p-priority values and queue numbers dot1p 0 1 2 3 4 5 6 7 Queue Number 0 0 0 1 2 3 3 3 Figure 24-2. Configuring dot1p Priority on an Interface FTOS#config FTOS(conf)#interface tengigabitethernet 1/0 FTOS(conf-if)#switchport FTOS(conf-if)#dot1p-priority 1 FTOS(conf-if)#end FTOS# Note: The dot1p-priority command marks all incoming traffic on an interface with a specified dot1p priority and maps all incoming traffic to the corresponding queue (Table 24-2). When you enable PFC and/or ETS on an interface, incoming traffic with a specified dot1p priority can be distributed across different queues. Therefore, when you use PFC and ETS to manage data center traffic, it is not recommended that you use the dot1p-priority command to set a queue assignment. See Data Center Bridging (DCB) for more information. Honor dot1p Priorities on Ingress Traffic By default, FTOS does not honor dot1p priorities on ingress traffic. To honor dot1p priorities on ingress traffic, use the service-class dynamic dot1p command from INTERFACE mode (Figure 24-3). You can configure this feature on physical interfaces and port-channels, but you cannot configure it on individual interfaces in a port channel. 418 | Quality of Service (QoS)