Service Manual

Pre-defined Profiles: wred_drop, wred-ge_y, wred_ge_g, wred_teng_y, wred_teng_.
ecn When you configure wred ecn <cr> command, instead of droppping the packets
exponentially, Explicit Congestion Notification (ECN) marking is made on the packets.
Defaults none
Command Modes CONFIGURATION (conf-qos-policy-out)
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the M I/O Aggregator.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information To assign drop precedence to green or yellow traffic, use this command. If there is no honoring enabled on the
input, all the traffic defaults to green drop precedence.
Related Commands
wred-profile — creates a WRED profile and name that profile.
trust — defines the dynamic classification to trust DSCP.
wred ecn
To indicate network congestion, rather than dropping packets, use explicit congestion notification (ECN).
Syntax
wred ecn
To stop marking packets, use the no wred ecn command.
Defaults none
Command Modes CONFIGURATION (conf-qos-policy-out)
Command History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the FN IOM.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820t.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
Usage Information
When you enable wred ecn, and the number of packets in the queue is below the minimum threshold, packets
are transmitted per the usual WRED treatment.
Quality of Service (QoS) 1027