Users Guide

Version Description
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.1.1.1 Introduced on the E-Series.
Usage Information
After you congure a unicast queue as strict-priority, that particular queue, on the entire chassis, is treated
as a strict-priority queue. Trac for a strict priority is scheduled before any other queues are
serviced. For example, if you send 100% line rate trac over the SP queue, it starves all other queues on the
ports on which this trac is owing.
Policy-Based QoS Commands
Policy-based trac classication is handled with class maps. These maps classify unicast trac into one of eight classes in S-Series
or eight classes in case of S6000. Dell Networking OS enables 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.
S4820T
Syntax
bandwidth-percentage percentage
To remove the bandwidth percentage, use the no bandwidth-percentage command.
Parameters
percentage Enter the percentage assignment of bandwidth 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-specic. 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
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
Quality of Service (QoS)
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