Users Guide
Quality of Service (QoS)
The Dell EMC Networking OS commands for quality of service (QoS) include trac conditioning and congestion control. QoS commands
are not universally supported on all Dell EMC Networking products.
Topics:
• Global Conguration Commands
• Per-Port QoS Commands
• Policy-Based QoS Commands
• DSCP Color Map Commands
Global Conguration Commands
There is only one global conguration QoS command.
qos-rate-adjust
By default, while rate limiting, policing, and shaping, Dell EMC Networking OS 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.
Command Modes CONFIGURATION
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell EMC
Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100-ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100-ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
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