Install Guide

DellEMC(conf-if-tf-1/1)#switchport
DellEMC(conf-if-tf-1/1)#dot1p-priority 1
DellEMC(conf-if-tf-1/1)#end
Honoring dot1p Priorities on Ingress Traffic
By default, Dell EMC Networking OS does not honor dot1p priorities on ingress traffic.
You can configure this feature on physical interfaces and port-channels, but you cannot configure it on individual interfaces in a
port channel.
You can configure service-class dynamic dot1p from CONFIGURATION mode, which applies the configuration 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.
NOTE: You cannot configure service-policy input and service-class dynamic dot1p on the same interface.
● Honor dot1p priorities on ingress traffic.
INTERFACE mode
service-class dynamic dot1p
DellEMC#configure terminal
DellEMC(conf)#interface twentyFiveGigE 1/1
DellEMC(conf-if-tf-1/1)#service-class dynamic dot1p
DellEMC(conf-if-tf-1/1)#end
Priority-Tagged Frames on the Default VLAN
Priority-tagged frames are 802.1Q tagged frames with VLAN ID 0. For VLAN classification, these packets are treated as
untagged. However, the dot1p value is still honored when you configure service-class dynamic dot1p or trust
dot1p.
When priority-tagged frames ingress an untagged port or hybrid port, the frames are classified to the default VLAN of the port
and to a queue according to their dot1p priority if you configure service-class dynamic dotp or trust dot1p. When
priority-tagged frames ingress a tagged port, the frames are dropped because, for a tagged port, the default VLAN is 0.
Dell EMC Networking OS Behavior: Hybrid ports can receive untagged, tagged, and priority tagged frames. The rate
metering calculation might be inaccurate for untagged ports because an internal assumption is made that all frames are treated
as tagged. Internally, the ASIC adds a 4-bytes tag to received untagged frames. Though these 4-bytes are not part of the
untagged frame received on the wire, they are included in the rate metering calculation resulting in metering inaccuracy.
Configuring Port-Based Rate Policing
If the interface is a member of a VLAN, you may specify the VLAN for which ingress packets are policed.
● Rate policing ingress traffic on an interface.
INTERFACE mode
rate police
The following example shows configuring rate policing.
DellEMC#configure terminal
DellEMC(conf)#interface twentyFiveGigE 1/1
DellEMC(conf-if-tf-1/1)#rate police 100 40 peak 150 50
DellEMC(conf-if-tf-1/1)#end
Configuring Port-Based Rate Shaping
Rate shaping buffers, rather than drops, traffic exceeding the specified rate until the buffer is exhausted. If any stream exceeds
the configured bandwidth on a continuous basis, it can consume all of the buffer space that is allocated to the port.
682
Quality of Service (QoS)