Operational Commands
7210 SAS D, E, K OS Quality of Service Guide Page 501
start-threshold
Syntax start-threshold percent
no start-threshold
Context config>qos>slope-policy>high-slope
config>qos>slope-policy>low-slope
Description
This command sets the low priority or high priority Random Early Detection (RED) slope position
for the shared buffer instantaneous utilization value where the packet discard probability comes
into affect. The percent parameter is expressed as a percentage of the shared buffer size.
The no form of this command restores the start-threshold value to the default setting.
Default start-threshold 75 — High slope default is 75% buffer utilization before discard probability comes into
affect.
start-threshold 50 — Low slope default is 50% buffer utilization before discard probability comes into
affect.
Parameters percent — The percentage of the shared buffer space for the buffer pool at which point the drop probability
comes into affect.
Values 0 — 100
queue
Syntax queue queue-id drop-rate num
no queue queue-id
Context config>qos>slope-policy>high-slope
config>qos>slope-policy>low-slope
Description
The drop-rate num parameter is expressed as a scalar number, and mapping to the percent of
packets dropped in congestion conditions is specified in Table 16, Drop Rate Value to Percent
Mapping Values, on page 48. The no form of this command restores the drop-rate value to the
default setting.
Default
drop-rate 1 — High slope default is 1 (6.25 drop-rate) for all the queues, this implies that once the
shared buffer utilization reaches the start-threshold level then packets egressing out from a
particular queue would be dropped at 6.25% rate.
drop-rate 0 — Low slope default is 0 (100% drop-rate) for all the queues, this implies that once the
shared buffer utilization reaches the start-threshold level then packets egressing out from a
particular queue would be dropped at 100% rate.
Parameters queue-id —
Specifies the ID of the queue for which the drop-rate is to be configured.
Values 1 — 8
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