Quality of Service (QoS) Commands
443
ProSafe Managed Switch
no cos-queue random-detect
Use this command to disable WRED and restore the default tail drop operation for the
specified queues on all interfaces or one interface.
Format cos-queue random-detect queue-id-1 [queue-id-2 … queue-id-n]
Modes
• Global Config
• Interface Config
random-detect exponential weighting-constant
Use this command to configure the WRED decay exponent for a CoS queue interface.
Format random-detect exponential-weighting-constant 0-15
Modes
• Global Config
• Interface Config
Default
no random-detect exponential weighting-constant
Use this command to reset the WRED decay exponent to the default value on all interfaces
or one interface.
Format no random-detect exponential-weighting-constant 0-15
Modes
• Global Config
• Interface Config
random-detect queue-parms
Use this command to configure WRED parameters for each drop precedence level supported
by a queue. Use it only when per-COS queue configuration is enabled (using the cos-queue
random-detect command).
min-thresh is the minimum threshold the queue depth (as a percentage) where WRED starts
marking and dropping traffic.
max-thresh is the maximum threshold is the queue depth (as a percentage) above which
WRED marks / drops all traffic.
drop-probability is the percentage probability that WRED will mark/drop a packet, when the
queue depth is at the maximum threshold. (The drop probability increases linearly from 0 just
before the minimum threshold, to this value at the maximum threshold, then goes to 100% for
larger queue depths). Each parameter is specified for each possible drop precedence ("color"
of TCP traffic).
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