Cisco Catalyst 3750 Metro User Manual

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Catalyst 3750 Metro Switch Command Reference
OL-9645-10
Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
random-detect dscp
random-detect dscp
Use the random-detect dscp policy-map class configuration command to configure Differentiated
Services Code Point (DSCP)-based Weighted Random Early Detection (WRED) settings in a
hierarchical policy map attached to an enhanced-services (ES) port. Use the no form of this command
to return to the default settings.
random-detect dscp dscp min-threshold max-threshold mark-prob-denominator
no random detect dscp dscp
Syntax Description
Defaults 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 listed in
Table 2-15 on page 2-380. The min-threshold
default is 64 packets, and the max-threshold default is 128 packets.
Command Modes Policy-map class configuration
Command History
dscp min-threshold
max-threshold
mark-prob-denominator
Specify WRED settings, such as packet-threshold and mark-probability
values, for a DSCP value. Specify these options:
• dscp—DSCP value. The range is 0 to 63. You also can enter a
mnemonic name for a commonly used value. For more information,
see the “Usage Guidelines” section.
• min-threshold—the minimum threshold in packets. The range is 1 to
32768. When the average queue size reaches the minimum threshold,
WRED randomly drops some packets with the specified DSCP value.
• max-threshold—the maximum threshold in packets. The range is 1 to
32768. When the average queue size exceeds the maximum threshold,
WRED drops all packets with the specified DSCP value.
• mark-prob-denominator—the denominator for the fraction of packets
dropped when the average queue size is at the maximum threshold.
The range is 1 to 65535. For example, if the denominator is 512, one
out of every 512 packets is dropped when the queue is at the maximum
threshold. The packet-drop probability is based on the minimum
threshold, the maximum threshold, and the mark-probability
denominator. The default is 10; 1 out of every 10 packets is dropped
at the maximum threshold.
Release Modification
12.1(14)AX This command was introduced.
12.2(25)EY Hierarchical service policies can be attached to inbound traffic received on
an ES port.

Cisco Catalyst 3750 Metro Specifications

General

Brand	Cisco
Model	Catalyst 3750 Metro
Category	Switch
Language	English