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Quality of Service
Quality of Service (QoS) is supported on platforms: c e s
Differentiated service is accomplished by classifying and queuing traffic, and assigning priorities to those
queues.
The E-Series has eight unicast queues per port and 128 multicast queues per-port pipe. Traffic is queued on
ingress and egress. By default, on ingress, all data traffic is mapped to Queue 0, and all control traffic is
mapped to Queue 7. On egress control traffic is mapped across all eight queues. All queues are serviced
using the Weighted Fair Queuing scheduling algorithm. You can only manage queuing prioritization on
egress.
The C-Series traffic has eight queues per port. Four queues are for data traffic and four are for control
traffic. All queues are serviced using the Deficit Round Robin scheduling algorithm. You can only manage
queuing prioritization on egress.
Table 41-1. FTOS Support for Port-based, Policy-based, and Multicast QoS Features
Feature Platform Direction
Port-based QoS Configurations c e s Ingress + Egress
Set dot1p Priorities for Incoming Traffic c e s Ingress
Honor dot1p Priorities on Ingress Traffic c e s
Configure Port-based Rate Policing c e s
Configure Port-based Rate Limiting e Egress
Configure Port-based Rate Shaping c e s
Policy-based QoS Configurations c e s Ingress + Egress
Classify Traffic c e s Ingress
Create a Layer 3 class map c e s
Set DSCP values for egress packets based on flow c e s
Create a Layer 2 class map c e s
Create a QoS Policy c e s Ingress + Egress