Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 429

Honoring dot1p Values on Ingress Packets FTOS provides the ability to honor dot1p values on ingress packets with the trust dot1p feature. To enable trust dot1p, use the trust dot1p command from POLICY-MAP-IN mode. Table 24-4 lists the queue to which the classified traffic is sent based on the dot1p value. Table 24-4. Default dot1p to Queue Mapping dot1p 0 1 2 3 4 5 6 7 Queue ID 0 0 0 1 2 3 3 3 The dot1p value is also honored for frames on the default VLAN. For more information, refer to Priority-Tagged Frames on the Default VLAN. Fall Back to trust diffserve or dot1p When using QoS service policies with multiple class maps, you can configure FTOS to use the incoming DSCP or dot1p marking as a secondary option for packet queuing in the event that no match occurs in the class maps. When class-maps are used, traffic is matched against each class-map sequentially from first to last. The sequence is based on the priority of the rules, as follows: 1. rules with lowest priority, or in the absence of a priority configuration, 2. rules of the next numerically higher queue By default, if no match occurs, the packet is queued to the default queue, Queue 0. In the following configuration, packets are classified to queues using the three class maps: Quality of Service (QoS) | 427