Reference Guide

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Quality of Service (QoS)
Quality of service (QoS) is supported on the Z9000 platform.
Differentiated service is accomplished by classifying and queuing traffic, and assigning priorities to those queues.
Figure 92. Dell Networking QoS Architecture
Implementation Information
The 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
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