Configuration manual

• 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 49. dot1p-priority Values and Queue Numbers
dot1p Queue Number
0 0
1 0
2 0
3 1
4 2
5 3
6 3
7 3
• Change the priority of incoming traffic on the interface.
dot1p-priority
Example of Configuring a dot1p Priority on an Interface
NOTE: The dot1p-priority command marks all incoming traffic on an interface with a specified
dot1p priority and maps all incoming traffic to the corresponding queue. When you enable PFC
and/or ETS on an interface, incoming traffic with a specified dot1p priority can be distributed across
different queues. Therefore, when you use PFC and ETS to manage data center traffic, it is not
recommended that you use the
dot1p-priority command to set a queue assignment. For more
information, refer to Data Center Bridging (DCB).
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Quality of Service (QoS)