Reference Guide

The local interface and the directly connected remote interface must have the same setting, and auto-negotiation is the easiest
way to accomplish that, as long as the remote interface is capable of auto-negotiation.
NOTE: As a best practice, Dell Networking recommends keeping auto-negotiation enabled. Only disable auto-negotiation on
switch ports that attach to devices not capable of supporting negotiation or where connectivity issues arise from
interoperability issues.
For 10/100/1000 Ethernet interfaces, the negotiation auto command is tied to the speed command. Auto-negotiation is
always enabled when the speed command is set to 1000 or auto.
Set Auto-Negotiation Options
The negotiation auto command provides a mode option for configuring an individual port to forced master/ forced slave
once auto-negotiation is enabled.
CAUTION: Ensure that only one end of the node is configured as forced-master and the other is configured as
forced-slave. If both are configured the same (that is, both as forced-master or both as forced-slave), the show
interface command flaps between an auto-neg-error and forced-master/slave states.
Example of the
negotiation auto Command
Dell(conf)# int tengig 0/0
Dell(conf-if-te-0/1)#neg auto
Dell(conf-if-te-0/1)# ?
end Exit from configuration mode
exit Exit from autoneg configuration mode
mode Specify autoneg mode
no Negate a command or set its defaults
show Show autoneg configuration information
Dell(conf-if-te-0/1)#mode ?
forced-master Force port to master mode
forced-slave Force port to slave mode
Dell(conf-if-te-0/1)#
For details about the speed, duplex, and negotiation auto commands, refer to the Interfaces chapter of the Dell
Networking OS Command Reference Guide.
View Advanced Interface Information
The following options have been implemented for the show [ip | running-config] interfaces commands for (only)
linecard interfaces.
When you use the configured keyword, only interfaces that have non-default configurations are displayed. Dummy linecard
interfaces (created with the linecard command) are treated like any other physical interface.
The following example lists the possible show commands that have the configured keyword available:
Dell#show interfaces configured
Dell#show interfaces linecard 0 configured
Dell#show interfaces tengigabitethernet 0 configured
Dell#show ip interface configured
Dell#show ip interface linecard 1 configured
Dell#show ip interface tengigabitethernet 1 configured
Dell#show ip interface br configured
Dell#show ip interface br linecard 1 configured
Dell#show ip interface br tengigabitethernet 1 configured
Dell#show running-config interfaces configured
Dell#show running-config interface tengigabitethernet 1 configured
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Interfaces