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280 Quality of Service (QoS) Commands
random-detect queue-parms
random-detect queue-parms
This command sets the WRED parameters for each drop precedence level supported by a
queue. The actual number of queue drop precedence levels is platform-specific (S2410 has
four). Use the
no form of this command to restore the default values for the queue WRED
parameters.
Syntax
[no] random-detect queue-parms queue-id-1 [queue-id-2 … queue-id-n] min-thresh
0-16 0-16 0-16 max-thresh 0-16 0-16 0-16 drop-prob-scale 0-15 0-15 0-15
Mode
Global Config
Usage
The drop-prob-scale value is the WRED (weighted random early discard) drop probability
scale factor expressed as an integer. This value, S, specifies that one out of every (2**S)
packets are dropped by WRED when the average queue length reaches its maximum
threshold value.
Command
History
Parameters
queue-id-1 [queue-id-2
…
queue-id-n]
Enter a queue ID from 0 to 3. Enter from one ID up to four.
Range: 0 to 3
min-thresh 0-16 0-16
0-16
Enter the keyword min-thresh followed by the desired minimum
threshold value for each associated queue (first threshold value is
associated with queue 1, etc.).
Range: 1 to 16
max-thresh 0-16 0-16
0-16
Enter the keyword max-thresh followed by the desired maximum
threshold value for each associated queue.
Range: 1 to 16
drop-prob-scale 0-15
0-15 0-15
Enter the keyword drop-prob-scale followed by the desired
value for each associated queue. See Usage, below.
Range: 1 to 15
Version 2.4.1 Introduced
Related
Commands
random-detect
exponential-weighting-constant
Set the decay exponent used by the WRED average queue depth
calculation for the interface.
show interfaces random-detect Display the WRED configuration for each supported drop
precedence level of each queue for the specified interface.