Administrator Guide

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.
C9000 Series
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
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.2(1.0) Introduced on the Z9500.
8.3.1.9.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
6.2.1.1 Introduced on the E-Series.
Usage Information
The unit of bandwidth percentage is 1%. 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.
buffer-stats-snapshot
Enable the buffer statistics tracking utility and enter the Buffer Statistics Snapshot configuration mode. You must enable this utility to be
able to configure the parameters for buffer statistics tracking.
C9000
Syntax
[No] buffer-stats-snapshot
To disable the buffer statistics tracking utility, enter the disable command from the BUFFER-STATS-
SNAPSHOT mode.
Default By default, buffer statistics tracking is disabled.
Command Modes
CONFIGURATION
CONFIGURATION TERMINAL BATCH
1360 Quality of Service (QoS)