Administrator Guide

Layer 2 Switching Commands 726
green/yellow/red. The maximum threshold may not be configured nor can the
threshold or drop probability be configured for non-TCP traffic. ECN
capability is supported.
Simple RED may be enabled/disabled for any CoS queue on the Dell
Networking N1500 Series switches, however, the drop probability must be one
of the values given below. The percentage before the dash indicates the
actual drop probability. The number after the dash indicates the value
entered in the drop-prob-scale parameter.
0.097%: 1
0.195%: 2
0.391%: 4
0.781%: 8
1.563%: 16
3.125%: 31
6.250%: 63
100%: 100
Examples
This example configures simple RED on an N1500 series switch. CoS queue 1
is globally configured for simple RED with a congestion threshold of 50% and
a drop probability of 0.781% for green colored traffic.
console(config)# random-detect queue-parms 1 min-thresh 50 0 0 drop-prob-
scale 8 0 0
console(config)#cos-queue random-detect 1
random-detect exponential-weighting-constant
Use the random-detect exponential-weighting-constant command to
configure the decay in the calculation of the average queue size user for
WRED on an interface or all interfaces.
NOTE: This command is not available on the N1500 Series switches.
Syntax
random-detect exponential-weighting-constant 0-15
no random-detect exponential-weighting-constant
2CSNXXX_SWUM204.book Page 726 Monday, January 25, 2016 1:25 PM