Administrator Guide

• Port-Based QoS Configurations
• Guidelines for Configuring ECN for Classifying and Color-Marking Packets
• Policy-Based QoS Configurations
• Enabling QoS Rate Adjustment
• Enabling Strict-Priority Queueing
• Weighted Random Early Detection
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
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
• Configuring Port-Based Rate Policing
• Configuring Port-Based Rate Shaping
Setting dot1p Priorities for Incoming Traffic
Change the priority of incoming traffic on the interface using the dot1p-priority command from INTERFACE
mode. The Dell Networking OS places 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 52. dot1p-priority Values and Queue Numbers
dot1p Queue Number
0 0
1 0
2 0
Quality of Service (QoS) 724