drop-probability
QFX5100, EX4600, QFX3500, and QFX3600, Switches, QFabric Systems
drop-probability 0 drop-probability high-value;
QFX10000 Switches
drop-probability percentage1 percentage2 ... percentage32;
Hierarchy Level
[edit class-of-service drop-profiles profile-name interpolate]
Description
When configuring WRED, map the packet drop-probability to the fullness of a queue (fill-level). You configure the fill-level and drop-probability statements in related pairs. The pairs of fill level and drop probability
values set a probability of dropping packets at a specified queue
fullness value.
On switches that support only two fill level/drop probability pairs, the first drop probability is always zero. The first fill level/drop probability pair sets the drop start point, and the second fill level/drop probability pair sets the drop end point.
On switches that support 32 fill level/drop probability pairs, the first fill level/drop probability pair sets the drop start point, and the last fill level/drop probability pair sets the drop end point.
As the queue fills from the drop start point to the drop end point, the rate of packet drop increases in a curve pattern. The higher the queue fill level, the higher the probability of dropping packets.
Options
0 (switches that support only two fill level/drop
probability pairs)—Probability that packets will drop at the
lowest fill-level value. This is always zero, because until
the queue reaches the specified low fill-level value, no
packets are scheduled to drop.
Range: 0
high-value (switches that support
only two fill level/drop probability pairs)—The maximum probability
that packets will drop before queue fullness exceeds the high value
of the queue fill-level, expressed as a percentage. If
the queue fills beyond the high fill-level value, all packets
drop.
Range: 0 through 100 percent
percentage1 percentage2 ... percentage32 (switches that
support 32 fill level/drop probability pairs)—The probability
that packets will drop before the queue fullness exceeds the fill-level value, expressed as a percentage. Each drop probability
pairs with a queue fill level to define the probability of a packet
dropping at a specified queue fullness.
Range: 0 through 100 percent
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 11.1.