Layer 2 Switching Commands 707
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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
• 0–15 — The weighting constant is used to smooth the calculation of the
queue size using the following formula where the 0-15 value is N.
Default Configuration
The default value is 15. This value corresponds to maximum smoothing of
the average queue size.
Command Mode
Global Configuration mode, Interface Configuration mode (physical and
port-channel), Interface Range mode
User Guidelines
The exponential weighting constant configuration is global and applies to all
WRED colors and all CoS queues. To use the instantaneous queue size in the
calculation of WRED drops, set the weighting constant to 0. Larger values of
N reduce the effect of instantaneous changes. To update the current queue
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