Random-Detect Dscp - Cisco ME 3800X Command Reference Manual

random-detect dscp

random-detect dscp
To change the minimum and maximum packet thresholds for the differentiated services code point
(DSCP) value, use the random-detect dscp command in QoS policy-map class configuration mode. To
return the minimum and maximum packet thresholds to the default for the DSCP value, use the no form
of this command.
Syntax Description dscp-value
min-threshold
max-threshold
mark-probability-denominator
Command Default If WRED is using the DSCP value to calculate the drop probability of a packet, all entries of the DSCP
table are initialized with the default settings shown in
command.
Command Modes Policy-map class configuration
Command History Release
15.1(2)EY
Usage Guidelines The random-detect dscp command allows you to specify the DSCP value. The DSCP value can be a
number from 0 to 63, or it can be one of the following keywords: af11, af12, af13, af21, af22, af23, af31,
af32, af33, af41, af42, af43, cs1, cs2, cs3, cs4, cs5, or cs7.
Cisco ME 3800X and ME 3600X Switch Command Reference
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random-detect dscp dscp-value min-threshold max-threshold [mark-probability-denominator]
no random-detect dscp dscp-value min-threshold max-threshold [mark-probability-denominator]
Modification
This command was introduced.
Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
The DSCP value. The DSCP value can be a number from 0 to 63, or
it can be one of the following keywords: af11, af12, af13, af21,
af22, af23, af31, af32, af33, af41, af42, af43, cs1, cs2, cs3, cs4,
cs5, cs7, ef, or rsvp.
Minimum threshold in number of packets. The value range of this
argument is from 1 to 4096. When the average queue length reaches
the minimum threshold, Weighted Random Early Detection
(WRED) randomly drops some packets with the specified DSCP
value.
Maximum threshold in number of packets. The value range of this
argument is from the value of the min-threshold argument to 4096.
When the average queue length exceeds the maximum threshold,
WRED drops all packets with the specified DSCP value.
(Optional) Denominator for the fraction of packets dropped when
the average queue depth is at the maximum threshold. For example,
if the denominator is 512, 1 out of every 512 packets is dropped
when the average queue is at the maximum threshold. The value
range is from 1 to 65536. The default is 10; 1 out of every 10 packets
is dropped at the maximum threshold.
Table 4 in the "Usage Guidelines" section of this
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