Reference Guide

Usage
Information
To honor all incoming 802.1p markings on incoming switched traffic on the interface, enter this
command. By default, this facility is not enabled (that is, the 802.1p markings on incoming
traffic are not honored).
You can apply this command on both physical interfaces and port channels. When you set the
service-class dynamic for a port channel, the physical interfaces assigned to the port channel
are automatically configured; you cannot assign the service-class dynamic command
to individual interfaces in a port channel.
• All dot1p traffic is mapped to Queue 0 unless you enable the service-class
dynamic dot1p command on an interface or globally.
• Layer 2 or Layer 3 service policies supersede dot1p service classes.
strict-priority queue
Configure a unicast queue as a strict-priority (SP) queue.
S4820T
Syntax
strict-priority queue unicast number
Parameters
unicast number Enter the keyword unicast then the queue number. The range is
from 1 to 3.
Defaults none
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
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.
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