SROS Command Line Interface Reference Guide
Quality of Service (QoS) Map Commands
5991-2114
© Copyright 2007 Hewlett-Packard Development Company, L.P.
1401
priority
The
priority
command provides a high-priority, low-latency queue, prioritizing this traffic above all
others. If no traffic is present in any other queue, priority traffic is allowed to burst up to the interface rate;
otherwise, priority traffic above the specified bandwidth is dropped. Use the
no
form of this command to
disable this feature. Variations of this command include:
priority
<bandwidth>
priority
<bandwidth> <burst>
priority percent
<bandwidth>
priority unlimited
Syntax Description
<bandwidth>
Specifies a low latency queue, prioritizing this traffic above all other user traffic in
kilobits per second (Range: 8 to 1,000,000). If no traffic is present in any other
queue, priority traffic is allowed to burst up to the interface rate. Otherwise, priority
traffic above the specified bandwidth will be dropped.
<burst>
Optional. Specifies the maximum burst size (in bytes) for traffic in this priority
queue. This parameter should be left unconfigured for optimal performance
(Range: 3 to 1,000,000).
percent
<value>
Allocates a minimum bandwidth for a traffic class, specifying the minimum as a
percentage of the total interface bandwidth. This command is especially useful for
protecting bandwidth allocation in multilink applications. See
Functional Notes
for
more details.
unlimited
Optional. Specifies no limits on the priority queue bandwidth. Excessive traffic
matching the QoS map can potentially use all of the available bandwidth on the
interface, so use this feature with caution.
Default Values
No default value is necessary for this command.
Functional Notes
The priority queue is intended for constant bit rate traffic such as voice due to the rate limiting. The sum of
the bandwidths reserved by priority commands for all entries of a QoS map cannot exceed the
max-reserved-bandwidth
rate specified for the interfaces that the map is applied to. Priority bandwidth is
guaranteed bandwidth (in kbps).
Determining Bandwidth Entries
Note
When possible, use the
priority
<bandwidth>
command to specify an absolute amount of
bandwidth (in kbps) for the priority queue.
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