Cisco Catalyst 3750 Metro - Mls Qos Queue-Set Output Threshold

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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
mls qos queue-set output threshold
mls qos queue-set output threshold
Use the mls qos queue-set output threshold global configuration command to configure the weighted
tail-drop (WTD) thresholds, to guarantee the availability of buffers, and to configure the maximum
memory allocation to a queue-set (four egress queues per port). Use the no form of this command to
return to the default setting.
mls qos queue-set output qset-id threshold queue-id drop-threshold1 drop-threshold2
reserved-threshold maximum-threshold
no mls qos queue-set output qset-id threshold [queue-id]
Syntax Description
Defaults When quality of service (QoS) is enabled, WTD is enabled.
Table 2-9 shows the default WTD threshold settings.
Command Modes Global configuration
Command History
qset-id ID of the queue-set. Each port belongs to a queue-set, which defines all the
characteristics of the four egress queues per port. The range is 1 to 2.
queue-id Specific queue in the queue-set on which the command is performed. The
range is 1 to 4.
drop-threshold1
drop-threshold2
Two WTD thresholds expressed as a percentage of the allocated queue
memory. The range is 1 to 400 percent.
reserved-threshold Amount of memory to be guaranteed (reserved) for the queue and expressed
as a percentage of the allocated memory. The range is 1 to 100 percent.
maximum-threshold Enable a full queue to obtain more buffers than are reserved for it. This is
the maximum memory that the queue can have before the packets are
dropped. The range is 1 to 400 percent.
Ta b l e 2-9 Default Egress Queue-Set WTD Threshold Settings
Feature Queue 1 Queue 2 Queue 3 Queue 4
WTD drop threshold 1 100 percent 50 percent 100 percent 100 percent
WTD drop threshold 2 100 percent 50 percent 100 percent 100 percent
Reserved threshold 50 percent 100 percent 50 percent 50 percent
Maximum threshold 400 percent 400 percent 400 percent 400 percent
Release Modification
12.1(14)AX This command was introduced.