Quality of Service (QoS) | 415
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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 Ingress + Egress
Set dot1p Priorities for Incoming Traffic Ingress
Honor dot1p Priorities on Ingress Traffic
Configure Port-based Rate Policing
Configure Port-based Rate Shaping Egress
Policy-Based QoS Configurations Ingress + Egress
Classify Traffic Ingress
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
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