Concept Guide
Quality of Service (QoS)
The Dell Networking operating software commands for quality of service (QoS) include trac conditioning and congestion control. QoS
commands are not universally supported on all Dell Networking Products.
Global Conguration Commands
There are only two global conguration QoS commands.
qos-rate-adjust
By default, while rate limiting, policing, and shaping, the system does not include the Preamble, SFD, or the IFG elds. These elds are
overhead; only the elds from MAC destination address to the CRC are used for forwarding and are included in these rate metering
calculations. You can optionally include overhead elds in rate metering calculations by enabling QoS Rate Adjustment.
Syntax
qos-rate-adjustment overhead-bytes
Parameters
overhead-bytes Include a specied number of bytes of packet overhead to include in rate limiting, policing,
and shaping calculations. The range is from 1 to 31.
Defaults QoS rate adjustment is disabled by default, and no qos-rate-adjust is listed in the running-conguration
Command Modes CONFIGURATION
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
service-class dot1p-mapping
Congure a service-class criterion based on a dot1p value.
Syntax
service-class dot1p-mapping {dot1p0 value | dot1p1 value | dot1p2 queue |
dot1p3 value | dot1p4 value| dot1p5 value | dot1p6 value | dot1p7 value}
Parameters
value Enter a dot1p list number and value. The list number range is from 0 to 7. The range is
from 0 to 3.
Defaults For each dot1p Priority, the default CoS queue value is:
• dot1p CoS Queue
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