CLI Guide

Layer 2 Switching Commands 401
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.
To enable auto-negotiation on a port, and configure the speed or duplex, it is
necessary to enter the speed or duplex command using the auto parameter.
The port will negotiate the medium, speed, and duplex settings with the link
partner.
To disable auto-negotiation on a port, it is necessary to enter the speed
command without using the auto parameter. 10G/40G fiber ports do not
support auto-negotiation and therefore require the operator to enter the
speed command followed by the duplex full command and with the desired
operating bandwidth if not already configured.
Example
The following example configures TenGigabit Ethernet port Te 1/0/5 to auto-
negotiate full and half duplex capability and speed.
console(config)# interface te1/0/5
console(config-if-Te1/0/5)# speed auto 1000 100
console(config-if-Te1/0/5)# duplex auto both