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• 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 50. dot1p-priority Values and Queue Numbers
dot1p Queue Number
0 2
1 0
2 1
3 3
4 4
5 5
6 6
7 7
• Change the priority of incoming traffic on the interface.
dot1p-priority
Example of Configuring a dot1p Priority on an Interface
Dell#config
Dell(conf)#interface tengigabitethernet 1/2
Dell(conf-if)#switchport
Dell(conf-if)#dot1p-priority 1
Dell(conf-if)#end
Dell#
Quality of Service (QoS)
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