Dell S3100 EMC Command Line Reference Guide for the Series 9.14.2.6 - Page 1239
wred ecn
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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, see the relevant Dell EMC Networking OS Command Line Reference Guide. Version Description 9.10(0.1) 9.10(0.0) 9.10(0.0) 9.8(2.0) 9.8(1.0) 9.8(0.0P5) 9.8(0.0P2) 9.7(0.0) 9.2(1.0) 9.0.2.0 8.3.19.0 8.3.11.1 8.3.7.0 Introduced on the S6010-ON and S4048T-ON. Introduced on the S3148. Introduced on the S6100-ON. Introduced on the S3100 series. Introduced on the Z9100-ON. Introduced on the S4048-ON. Introduced on the S3048-ON. Introduced on the S6000-ON. Introduced on the Z9500. Introduced on the S6000. Introduced on the S4820t. Introduced on the Z9000. 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. When you enable wred ecn, and the number of packets in the queue is between the minimum threshold and the maximum threshold, one of the following two scenarios can occur: • If the transmission endpoints are ECN-capable and traffic is congested, and the WRED algorithm determines that the packet should have been dropped based on the drop probability, the packet is transmitted and marked so the routers know the system is congested and can slow transmission rates. • If neither endpoint is ECN-capable, the packet may be dropped based on the WRED drop probability. This behavior is the identical treatment that a packet receives when WRED is enabled without ECN configured on the router. When you enable wred ecn, and the number of packets in the queue is above the maximum threshold, packets are dropped based on the drop probability. This behavior is the identical treatment a packet receives when WRED is enabled without ECN configured on the router. Related Commands • wred-profile - creates a WRED profile and name that profile. Quality of Service (QoS) 1239
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