Random-Detect Dscp - Cisco CRS Command Reference Manual

random-detect dscp

random-detect dscp
To configure the Weighted Random Early Detection (WRED) thresholds for packets with a specific
differentiated services code point (DSCP) value, use the random-detect dscp command in policy map class
configuration mode. To return the thresholds to the default for the DSCP value, use the no form of this
command.
random-detect dscp dscp-value min-threshold [ units ] max-threshold [ units ]
no random-detect dscp dscp-value min-threshold [ units ] max-threshold [ units ]
Syntax Description
dscp-value
min-threshold
max-threshold
units
Command Default
Match packets with default DSCP (000000).
Cisco IOS XR Modular Quality of Service Command Reference for the Cisco CRS Router, Release 4.0
84
DSCP value. Up to eight dscp-values (any combination of numbers, ranges, and reserved
keywords) can be used separated by commas. The following arguments are supported:
• Number from 0 to 63 that sets the DSCP value.
• Range of DSCP values. Range is from 0 to 63.
• Reserved keywords can be specified instead of numeric values.
Reserved Keywords, on page 45
The range argument is not
Note
supported.
Minimum threshold in number of packets. The value range of this argument is from 0
to 1073741823. When the average queue length reaches the minimum threshold, 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 1073741823. When the average queue length
exceeds the maximum threshold, WRED drops all packets with the specified DSCP
value.
(Optional) Units for the threshold values. Values can be:
• bytes—bytes
• gbytes—gigabytes
• kbytes—kilobytes
• mbytes—megabytes
• ms—milliseconds
• packets—packets (default)
• us—microseconds
Quality of Service Commands on the Cisco IOS XR Software
describes the reserved keywords.
Table 2: IP DSCP
OL-23235-03