Alcatel-Lucent 7450 Quality Of Service Manual page 809

Ethernet service switch; service router; extensible routing system

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The defined percent-of-queue-depth value for the start-depth command is defined as a percentage of

the queue-mbs value. The value defined for the start depth must be less than or equal to the current

percentage value for max-depth. If the defined value is greater than max-depth, the start-depth

command will fail with no change to the current value. If the max-depth value is less than the desired

start-depth value, first change max-depth to a value equal to or greater than the desired start-depth.

The no form of the command restores the default start point percentage value for the slope. The low

and high slopes have different default values. If the default value is greater than the current max-depth

value, the no start-depth command will fail.

percent-of-queue-depth — Specifies the start depth for the high or low slopes.

config>qos>hsmda-slope-policy

This command enables the low priority RED slope context of an HSMDA slope policy. Within the

low-slope context, the low priority RED slope configuration commands defining the start of slope, end

of slope and maximum probability points may be executed.

For ingress, packets classified as priority low or profile out are mapped to the low priority RED slope

for queue congestion management.

At egress, packets received from ingress as out-of-profile are mapped to the low priority RED slope

for queue congestion management. Out-of-profile is derived at ingress either from above-CIR profiling

or from explicit profile out classification.

max-depth percent-of-queue-depth

no max-depth

config>qos>hsmda-slope-policy>high-slope

config>qos>hsmda-slope-policy>low-slope

This command defines the ending queue depth point for a slope relative to the maximum depth of the

queue-mbs value of the HSMDA slope policy. At the point the slope ends, it has risen from the starting

queue depth value with a discard probability of zero. At max-depth, the slope will have risen to the

discard probability defined by max-depth at which point the slope rises directly to a discard probability

If the queue depth has reached the point defined by max-depth, all packets associated with the slope

will be discarded.

Quality of Service Guide

High Scale Ethernet MDA Capabilities