Users Guide

Layer 2 Switching Commands 396
duplex
Use the duplex command in Interface Configuration mode to configure the
duplex operation of a given Ethernet interface. To restore the default, use the
no form of this command.
Syntax
duplex {full | half | auto {full | half | both}}
no duplex
• auto—Enable auto-negotiation for the port and advertise the configured
capabilities.
• half—Enable half-duplex operation.
• full—Enable full-duplex operation.
• both—Enable auto-negotiation of full and half duplex operation.
Default Configuration
Auto-negotiation is enabled by default on copper ports and for 1000BASE-X
ports.
Command Mode
Interface Configuration (Ethernet) mode
User Guidelines
The duplex command is only available on the Dell EMC Networking N1500,
and N2200 Series switches. Other switch models support full duplex
operation only.
Configuration of auto-negotiation or fixed operation is performed by the
speed command. Therefore, the speed command should be issued prior to
setting the duplex configuration or the command may be rejected. Half-
duplex is only supported for 10/100 speeds.
Copper ports configured for 1000BASE-T/2500BASE-T speed operate in full
duplex mode only. Fiber ports operate in full duplex mode only, even if
provisioned with an SFP or SFP+DAC cable. Auto-negotiation is required on
1G/2.5G/5G/10G/40G copper ports and 1G fiber ports.