Weighted Random Early Detection Configuration - Lenovo RackSwitch G8264 Command Reference Manual

Weighted Random Early Detection Configuration

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G8264 Command Reference for ENOS 8.4
Weighted Random Early Detection (WRED) provides congestion avoidance by
pre‐emptively dropping packets before a queue becomes full. The G8264
implementation of WRED defines TCP and non‐TCP traffic profiles on a per‐port,
per COS queue basis. For each port, you can define a transmit‐queue profile with
thresholds that define packet‐drop probability.
These commands allow you to configure global WRED parameters. For port
WRED commands, see "Port WRED Configuration" on page
Table 194.
WRED Configuration Options
Command Syntax and Usage
[no] qos random­detect ecn enable
Enables or disables Explicit Congestion Notification (ECN). When ECN is on,
the switch marks the ECN bit of the packet (if applicable) instead of dropping
the packet. ECN‐aware devices are notified of the congestion and those
devices can take corrective actions.
Note: ECN functions only on TCP traffic.
Command mode: Global configuration
[no] qos random­detect enable
Enables or disables Random Detection and avoidance.
Command mode: Global configuration
show qos random­detect
Displays current Random Detection and avoidance parameters.
Command mode: All
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