Dell PowerEdge FN I/O Module Command Line Reference Guide 9.10(0.0)

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negotiation auto

Enable auto-negotiation on an interface.

Syntax

negotiation auto

To disable auto-negotiation, enter no negotiation auto command.

Defaults

Enabled.

Command Modes

INTERFACE

Supported Modes

All Modes

Command History

Version	Description
9.9(0.0)	Introduced on the FN IOM.
9.4(0.0)	Supported on the FN I/O Aggregator.

Usage Information

The no negotiation auto command is only available if you first manually set the speed of a port to 10Mbits or 100Mbits.

Example (Configured)

Dell#show interfaces configured
                                             TenGigabitEthernet 0/1 is up, line protocol is up
                                             Hardware is DellEth, address is 00:1e:c9:de:04:9c
                                             Current address is 00:1e:c9:de:04:9c
                                             Server Port AdminState is N/A
                                             Pluggable media not present
                                             Interface index is 33886978
                                             Internet address is not set
                                             Mode of IPv4 Address Assignment : NONE
                                             DHCP Client-ID :001ec9de049c
                                             MTU 12000 bytes, IP MTU 11982 bytes
                                             LineSpeed 10000 Mbit
                                             Flowcontrol rx on tx off
                                             ARP type: ARPA, ARP Timeout 04:00:00
                                             Last clearing of "show interface" counters 03:56:48
                                             Queueing strategy: fifo
                                             Input Statistics:

User Information

Both sides of the link must have auto-negotiation enabled or disabled for the link to come up.

The following details the possible speed and auto-negotiation combinations for a line between two 10/100/1000 Base-T Ethernet interfaces.

Port 0

auto-negotiation enabled* speed 1000 or auto
auto-negotiation enabled speed 100
auto-negotiation disabled speed 100
auto-negotiation disabled speed 100
auto-negotiation enabled* speed 1000 or auto

Port 1

auto-negotiation enabled* speed 1000 or auto
auto-negotiation enabled speed 100
auto-negotiation disabled speed 100
auto-negotiation enabled speed 100
auto-negotiation disabled speed 100

Link Status Between Port 1 and Port 2

Up at 1000 Mb/s
Up at 100 Mb/s
Up at 100 Mb/s
Down
Down

* You cannot disable auto-negotiation when the speed is set to 1000 or auto.

Related Commands

speed (for 1000/10000 interfaces) — sets the link speed to 10, 100, 1000 or auto-negotiate the speed.