Reference Guide

Quality of Service | 539
Figure 30-1. Dell Networking QoS Architecture
Implementation Information
Dell Networking QoS implementation complies with IEEE 802.1p User Priority Bits for QoS Indication. It
also implements these Internet Engineering Task Force (IETF) documents:
• RFC 2474, Definition of the Differentiated Services Field (DS Field) in the IPv4 Headers
• RFC 2475, An Architecture for Differentiated Services
• RFC 2597, Assured Forwarding PHB Group
• RFC 2598, An Expedited Forwarding PHB
You cannot configure port-based and policy-based QoS on the same interface.
Port-based QoS Configurations
You can configure the following QoS features on an interface:
• Set dot1p Priorities for Incoming Traffic
• Configure Port-based Rate Policing
• Configure Port-based Rate Limiting
Packet
Classification
(ACL)
Ingress
Packet
Processing
Marking
(DiffServ,
802.1p, Exp)
Rate Policing
Buffers &
Class-based
Queues
Congestion
Avoidance
(WRED)
Egress
Packet
Processing
Traffic
Shaping
Egress
Congestion Management
(WFQ Scheduling)
Rate Limiting
Buffers &
Class-based
Queues
Switching