fill-level
QFX5100, EX4600, QFX3500, and QFX3600, Switches, QFabric Systems
fill-level low-value fill-level high-value;
QFX10000 Switches
fill-level level1 level2 ... level32;
Hierarchy Level
[edit class-of-service drop-profiles profile-name interpolate]
Description
When configuring weighted random early detection
(WRED), map the fullness of a queue to a packet drop-probability value. 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.
The first fill level is the packet drop start point. Packets do not drop until the queue fullness reaches the first fill level. The last fill level is the packet drop end point. After the queue exceeds the fullness set by the drop end point, all non-ECN packets are dropped. 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.
On switches that support only two fill level/drop probability pairs, the two pairs are the drop start point and the drop end point. On switches that support up to 32 fill level/drop probability pairs, you can configure intermediate interpolations between the drop start point and the drop end point, which provides greater flexibility in controlling the packet drop curve.
Do not configure the last fill level as 100 percent.
Options
low-value (switches that support only two fill level/drop probability pairs)—Fullness of the queue before packets begin to drop, expressed as a percentage. The low value must be less than the high value.
Range: 0 through 100
high-value (switches that support only two fill level/drop probability pairs)—Fullness of the queue before it reaches the maximum drop probability. If the queue fills beyond the fill level high value, all packets drop. The high value must be greater than the low value.
Range: 0 through 100
level1 level2 ... level32 (switches that support 32 fill level/drop probability pairs)—The queue fullness level, expressed as a percentage. Each fill level pairs with a drop probability to define the probability of a packet dropping at a specified queue fullness.
Range: 0 through 100
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.