Extreme Networks ExtremeWare 7.3.0, Command Reference Manual

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enable red ports
ExtremeWare Software 7.3.0 Command Reference Guide 407
enable red ports
enable red ports <portlist>
Description
Enables Random Early Detection (RED) on a port.
Syntax Description
Default
Disabled.
Usage Guidelines
Policy-based QoS can be configured to perform per-port Random Early Detection (RED) and
drop-probability. Using this capability, the switch detects when traffic is filling up in any of the eight
hardware queues, and performs a random discard on subsequent packets, based on the configured RED
drop-probability.
Instead of dropping sessions during times when the queue depth is exceeded, RED causes the switch to
lower session throughput. The destination node detects the dropped packet, and, using standard TCP
windowing mechanisms, slows the transmission from the source node. RED drop-probability is
configured on a system-wide basis, and has a valid range from 0% to 100%.
Example
The following command enables RED on ports 5-7:
enable red ports 5-7
History
This command was first available in ExtremeWare 6.0.10.
Platform Availability
This command is available on all platforms.
portlist Specifies a list of ports or slots and ports. May be in the form 1, 2, 3-5, 2:5,
2:6-2:8.