Command Line Reference Guide

816 | Quality of Service (QoS)
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strict-priority queue
c e s
Configure a unicast queue as a strict-priority (SP) queue.
Syntax
strict-priority unicast queue number
Parameters
Defaults
No default behavior or value
Command Modes
CONFIGURATION
Command
History
Usage
Information
Once a unicast queue is configured as strict-priority, that particular queue, on the entire chassis, is
treated as 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 will starve 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 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. The commands are:
• bandwidth-percentage
• bandwidth-weight
• class-map
• clear qos statistics
• description
• match ip access-group
Traffic monitor 5 Traffic coming to class 5
Traffic monitor 6 Traffic coming to class 6
Traffic monitor 7 Traffic coming to class 7
Total: yellow Total number of packets that have exceeded the configured committed rate
Total: red Total number of packets that have exceeded the configured peak rate
Table 32-3. show interfaces police Command Example Fields (continued)
Field Description
unicast queue number Enter the keywords unicast queue followed by the queue number.
C-Series and S-Series Range: 1 to 3
E-Series Range: 1 to 7
Version 8.3.5.0 Introduced on S55
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
pre-Version 6.1.1.1 Introduced on E-Series