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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
queue-limit
queue-limit
To set the queue maximum threshold for Weighted Tail Drop (WTD) in an output policy map, use the
queue-limit command in policy-map class configuration mode. To return to the default, use the no form
of this command.
queue-limit {limit [bytes bytes | us microseconds] | cos value | discard-class value | dscp value |
exp value | precedence value | qos-group value}
no queue-limit {limit [bytes | us] | cos value | discard-class value | dscp value | exp value |
precedence value | qos-group value}
Syntax Description
Defaults Default queue limits depend on the interface:
• 10 Mb/s interfaces: 10000 us or 12 KB
• 100 Mb/s interfaces: 1000 us or 12KB
• 1000 Mb/s interfaces: 100 us or 12 KB
• 10 Gb/s interfaces: 100 us or 120 KB
Command Modes Policy-map class configuration
limit [bytes | us] The threshold limit:
• For bytes bytes, enter the maximum threshold in bytes. The range is
from 200 to 491520. The default depends on the interface speed. On
10/100/1000 Mb/s interfaces, the default is approximately 12000 bytes.
On 10 Gb/s interfaces, the default is approximately 120000 bytes.
• For us microseconds, enter the maximum threshold in microseconds.
This is the default for specifying threshold. The range is from 1 to 3932.
The default depends on the interface: 10 Mb/s interfaces: 10000 us,
100 Mb/s interfaces: 1000 us, 1000 Mb/s and 10 Gb/s interfaces: 100 us.
If you do not enter bytes bytes or us microseconds, the default is us.
cos value Specifies a cost of service (CoS) value. The range is from 0 to 7.
discard-class value Specifies a drop precedence for a packet during congestion management. The
range is 0 to 7. This is the preferred way to specify a subclass within a queue
to establish drop preference based on a queue buffer thresholds.
dscp value Specifies a Differentiated Services Code Point (DSCP) value. The range is
from 0 to 63.
exp value Specifies an MPLS exponential value. The range is from 0 to 7.
precedence value Specifies an IP precedence value. The range is from 0 to 7.
qos-group value Specifies a quality-of-service (QoS) group value. The range is from 0 to 99.
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