Dell Force10 S60-44T FTOS Configuration Guide for the S60 System FTOS 8.3.3.8 - Page 598

www.dell.com | support.dell.com DSCP/CP hex range (XXX)xxx DSCP Definition 011XXX 010XXX 001XXX 000XXX AF3 AF2 AF1 BE (Best Effort) Traditional IP Precedence Flash Immediate Priority Best Effort E-Series Internal Queue ID 3 2 1 0 C-Series Internal Queue ID 1 1 0 0 S-Series Internal DSCP/CP Queue ID decimal 1 16-31 1 0 0-15 0 Honoring dot1p values on ingress packets FTOS provides the ability to honor dot1p values on ingress packets with the Trust dot1p feature. Enable Trust dot1p using the command trust dot1p from POLICY-MAP-IN mode. Table 31-6 specifies the queue to which the classified traffic is sent based on the dot1p value. Table 31-6. Default dot1p to Queue Mapping dot1p 0 1 2 3 4 5 6 7 E-Series Queue ID 2 0 1 3 4 5 6 7 C-Series Queue ID 1 0 0 1 2 2 3 3 S-Series Queue ID 1 0 0 1 2 2 3 3 The dot1p value is also honored for frames on the default VLAN; see Priority-tagged Frames on the Default VLAN. Fall Back to trust diffserve or dot1p e Fall Back to trust diffserve or dot1p is available only on platforms: 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 598 | Quality of Service