Cisco 10000 Series User Manual

11-15
Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 11 Managing Packet Queue Congestion
Controlling Congestion Using Weighted Random Early Detection
• On the PRE3 and PRE4, the supported random-detect commands specify the aggregate profile for
the queue. To configure a default drop profile for a queue, the random-detect basis command is
used (for example, random-detect dscp-based aggregate command). The random-detect
discard-class-based, random-detect atm-clp-based and random-detect atm-clp-based
commands do not have an aggregate form of the command on the PRE3 and PRE4.
Note If you do not specify any arguments, WRED uses the default IP precedence in the WRED calculations.
Ta b l e 11-5 WRED Drop Profile Commands
Command Description
random-detect dscp dscp-value
min-thresh-value max-thresh-value
mark-probability-denominator-value
PRE3 and PRE4
random-detect dscp values sub-class-val1
[...[sub-class-val8]]
minimum-thresh
min-thresh-value maximum-thresh
max-thresh-value mark-prob mark-prob-value
A number that indicates the drop eligibility of a
packet based on the differentiated services code
point. Value numbers are from 0 to 63.
random-detect ip precedence precedence-value
min-thresh-value max-thresh-value
mark-probability-denominator-value
PRE3 and PRE4
random-detect precedence values sub-class-val1
[...[sub-class-val8]]
minimum-thresh
min-thresh-value maximum-thresh
max-thresh-value mark-prob mark-prob-value
A number that indicates the drop eligibility of a
packet based on the IP precedence level. Valid
values are from 0 to 7. Typically, 0
represents low
priority traffic that can be aggressively managed
(dropped) and 7
represents high priority traffic.
random-detect discard-class discard-class-value
min-thresh-value max-thresh-value
mark-probability-denominator-value
PRE3 and PRE4
random-detect discard-class discard-class-value
min-thresh-value max-thresh-value
mark-probability-denominator-value
A number that indicates the drop eligibility of a
packet based on the discard-class. Valid values
are from 0
to 7.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English