Reference Guide

Usage
Information
Guarantee a minimum bandwidth to different queues globally using the service-
class bandwidth-percentage command from CONFIGURATION mode. The
command is applied in the same way as the
bandwidth-percentage command
in an output QoS policy. The bandwidth-percentage command in QOS-
POLICY-OUT mode supersedes the
service-class bandwidth-percentage
command.
When you enable ETS, the egress QoS features in the output QoS policy-map (such
as service-class bandwidth-percentage and bandwidth-percentage),
the default bandwidth allocation ratio for egress queues are superseded by ETS
configurations. This is to provide compatibility with DCBX. Therefore, Dell
Networking OS recommends disabling ETS when you wish to apply these features
exclusively. After you disable ETS on an interface, the configured parameters are
applied.
Policy-Based QoS Commands
Policy-based traffic classification is handled with class maps. These maps classify unicast traffic into one
of four classes. The system allows you to match multiple class maps and specify multiple match criteria.
Policy-based QoS is not supported on logical interfaces, such as port-channels, VLANs, or Loopbacks.
bandwidth-percentage
Assign a percentage of weight to the class/queue.
Syntax
bandwidth-percentage percentage
To remove the bandwidth percentage, use the no bandwidth-percentage
command.
Parameters
percentage Enter the percentage assignment of weight to the class/
queue. The range is from 1 to 100% (granularity 1%).
Defaults none
Command
Modes
CONFIGURATION (conf-qos-policy-out)
Command
History
Version 9.2(0.0) Introduced on the M I/O Aggregator. This command is
supported in Programmable-Mux (PMUX) mode only.
Version 8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
The unit of bandwidth percentage is 1%. A bandwidth percentage of 0 is allowed
and disables the scheduling of that class. If the sum of the bandwidth percentages
given to all eight classes exceeds 100%, the bandwidth percentage automatically
scales down to 100%.
Related
Commands
qos-policy-output — creates a QoS output policy.
456
PMUX Mode of the I/O Aggregator