Implementation Information - Dell Force10 C150 Configuration Manual

Figure 41-1. Dell Force10 QoS Architecture
Ingress
Packet
Processing
Rate Limiting
Congestion Management
(WFQ Scheduling)

Implementation Information

Dell Force10 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.
Marking
(DiffServ,
802.1p, Exp)
Packet
Classification
Rate Policing
(ACL)
Buffers
Class-based
Queues
Egress Congestion
Avoidance
(WRED)
Buffers
Class-based
Queues
Egress
Traffic
Packet
Shaping
Processing
Switching
Quality of Service | 851