Reference Guide

Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
pre-Version
6.1.1.1
Introduced on the E-Series.
Usage
Information
After you configure a unicast queue as strict-priority, that particular queue, on the entire
chassis, is treated as a strict-priority queue. Traffic for a strict priority is scheduled
before any other queues are serviced. For example, if you send 100% line rate traffic over the
SP queue, it starves all other queues on the ports on which this traffic is flowing.
Policy-Based QoS Commands
Policy-based traffic classification is handled with class maps. These maps classify unicast traffic into one of eight
classes in E-Series and one of four classes in C-Series and S-Series. FTOS 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.
E-Series, Z-Series, S4810
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 0 to 100% (granularity 1%).
Defaults none
Command Modes CONFIGURATION (conf-qos-policy-out)
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 6.2.1.1 Introduced on the E-Series.
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%.
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