Reference Guide

Quality of Service (QoS) | 653
Figure 33-1. Dell Force10 Networks QoS Architecture
Implementation Information
Dell Force10’s 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, and SONET line cards
support only port-based QoS.
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
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