red-buffer-occupancy
Syntax
red-buffer-occupancy {
weighted-averaged [ instant-usage-weight-exponent exponent-value ];
}
Hierarchy Level
[edit chassis fpc slot-number pic pic-number ], [edit chassis lcc number fpc slot-number pic pic-number]
Description
Configure the IQ PIC to base random early detection (RED) queue management on a simple moving average buffer occupancy calculation. If you do not include this statement, the IQ PIC bases RED on an instantaneous buffer occupancy value. As an option, you can specify that the IQ PIC bases RED on a weighted moving average of buffer occupancy values.
If you configure this feature on a channelized OC12 intelligent queuing (IQ) PIC, the PIC reboots.
Options
weighted-averaged—Configure
the IQ PIC to base RED processing on a simple moving average of instantaneous
buffer occupancy values instead of an instantaneous buffer occupancy.
instant-usage-weight-exponent exponent-value—(Optional) Specify the integer to be used as the negative
exponent of 2 to express a weight value. The PIC performs weighted
RED (WRED) by based on a calculation of average buffer occupancy that
applies the specified weight value to the instantaneous buffer occupancy
and then factors the weighted value into the calculation of average
buffer occupancy. Valid exponent range is from 1 through 31 (weight
values from 2-1 through 2-31). If you do not specify this option, the default
exponent value is 0, which results in a weight value of 20 = 1. With a weight value of 1, the calculation
of weighted average buffer occupancy yields the same value as the
simple average buffer occupancy.
You can specify an exponent value greater than 31, and
the value displays in the output of show commands. However,
the PIC replaces the out-of-range value with the operational value of 31, which results in a weight value of 2-31 = 1 / 231 = 0.0000000004656612873077392578125.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 8.3.