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strict-priority queue
Configure a unicast queue as a strict-priority (SP) queue.
C-Series, E-Series, S-Series, Z-Series
Syntax
strict-priority queue unicast number
Parameters
unicast
number
Enter the keyword unicast followed by the queue number. For the
C-Series and S-Series, the range is 1 to 3. For the E-Series, the range
is 1 to 7.
Defaults none
Command Modes CONFIGURATION
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.
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