Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 907

• Enabling Strict-Priority Queueing • Weighted Random Early Detection • Explicit Congestion Notification • Using A Configurable Weight for WRED and ECN • Pre-Calculating Available QoS CAM Space • SNMP Support for Buffer Statistics Tracking 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 and IPv6 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. NOTE: You cannot simultaneously use egress rate shaping and ingress rate policing on the same virtual local area network (VLAN). • Setting dot1p Priorities for Incoming Traffic • Honoring dot1p Priorities on Ingress Traffic • Configuring Port-Based Rate Policing • Configuring Port-Based Rate Shaping Setting dot1p Priorities for Incoming Traffic The system assigns traffic marked with a priority in a queue based on the following table. If you set a dot1p priority for a port-channel, all port-channel members are configured with the same value. You cannot assign a dot1p value to an individual interface in a port-channel. Table 71. dot1p-priority Ingress Values and Queue Numbers Packet Dot1p on Ingress Packet Queue Number on C9000 Series 0 1 1 0 2 2 Quality of Service (QoS) 907