Service Manual

• RFC 2474, Denition of the Dierentiated Services Field (DS Field) in the IPv4 Headers
• RFC 2475, An Architecture for Dierentiated Services
• RFC 2597, Assured Forwarding PHB Group
• RFC 2598, An Expedited Forwarding PHB
You cannot congure port-based and policy-based QoS on the same interface.
Port-Based QoS Congurations
You can congure the following QoS features on an interface.
• Setting dot1p Priorities for Incoming Trac
• Conguring Port-Based Rate Policing
• Conguring Port-Based Rate Shaping
Setting dot1p Priorities for Incoming Trac
Dell Networking OS places trac 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 congured with the same value. You cannot assign a
dot1p value to an individual interface in a port-channel.
Table 44. 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 trac on the interface.
dot1p-priority
Example of Conguring a dot1p Priority on an Interface
Dell#configure terminal
Dell(conf)#interface gigabitethernet 1/1
Dell(conf-if-gi-1/1)#switchport
Dell(conf-if-gi-1/1)#dot1p-priority 1
Dell(conf-if-gi-1/1)#end
Honoring dot1p Priorities on Ingress Trac
By default, Dell Networking OS does not honor dot1p priorities on ingress trac.
You can congure this feature on physical interfaces and port-channels, but you cannot congure it on individual interfaces in a port
channel.
You can congure service-class dynamic dot1p from CONFIGURATION mode, which applies the conguration to all interfaces. A
CONFIGURATION mode service-class dynamic dot1p entry supersedes any INTERFACE entries. For more information, refer to
Mapping dot1p Values to Service Queues.
Quality of Service (QoS)
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