Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module Configuration Guide - Page 417

24 Quality of Service (QoS) Overview Differentiated service is accomplished by classifying and queuing traffic and assigning priorities to those queues. The MXL Switch traffic has four data queues per port. All queues are serviced using the Weighted Round Robin scheduling algorithm. You can only manage queuing prioritization on egress. (Figure 24-1) Note: When you enable DCB, the egress QoS features in the output QoS policy-map (such as service-class bandwidth-percentage and bandwidth-percentage), the default bandwidth allocation ratio for egress queues and strict-priority may not work as intended.This is to provide compatibility with DCBX. Hence, it is recommended to have the DCB disabled when you wish to apply these features exclusively. Table 24-1. FTOS Support for Port-based, Policy-based, and Multicast QoS Features Feature Direction Port-Based QoS Configurations Set dot1p Priorities for Incoming Traffic Honor dot1p Priorities on Ingress Traffic Configure Port-based Rate Policing Configure Port-based Rate Shaping Policy-Based QoS Configurations Classify Traffic Create a Layer 3 Class Map Set DSCP Values for Egress Packets Based on Flow Create a Layer 2 Class Map Create a QoS Policy Ingress + Egress Ingress Egress Ingress + Egress Ingress Ingress + Egress Quality of Service (QoS) | 415