Nokia 7705 - Page 372

Slope QoS Policies
372
Quality of Service Guide
3HE 11014 AAAC TQZZA Edition: 01
7.4.2.1.3 WRED/RED Slope Commands
max-avg
Syntax max-avg percent
no max-avg
Context config>qos>slope-policy>high-slope
config>qos>slope-policy>low-slope
Description This command sets the low-priority or high-priority WRED or RED slope position for the
queue average usage value where the packet discard probability rises directly to one
(maxThreshold or maxT). The percent parameter is expressed as a percentage of the
maximum queue depth (buffer-based WRED) or a percentage of maximum payload of the
queue (payload-based WRED).
The no form of this command restores the max-avg value to the default setting. If the current
start-avg setting is larger than the default, an error will occur and the max-avg setting will
not be changed to the default.
Default max-avg 90 (the high slope default is 90% queue usage before discard probability is 1)
max-avg 75 (the low slope default is 75% queue usage before discard probability is 1)
Parameters percent — the percentage of the maximum queue depth at which point the drop
probability becomes 1. The value entered must be greater than or equal to the
current setting of start-avg. If the entered value is smaller than the current value of
start-avg, an error will occur and no change will take place.
Values 0 to 100
max-prob
Syntax max-prob percent
no max-prob
Context config>qos>slope-policy>high-slope
config>qos>slope-policy>low-slope
Description This command sets the high-priority or low-priority WRED/RED maximum discard probability
(maxDP) at slope position max-avg. The percent parameter is expressed as a percentage of
packet discard probability where always discard is a probability of 1. A max-prob value of 80
represents 80% of 1, or a packet discard probability of 0.8.
For bridging domain queues on the 2-port 10GigE (Ethernet) Adapter card and 2-port 10GigE
(Ethernet) module, the queues support the following DP (discard probability) values: 0%, 1%,
2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 25%, 50%, 75%, and 100%. User-configured
values are rounded down to match these DP values.