Configure Auto-Negotiation Advertisements

Configure local port Auto-Negotiation advertisements to specify the speed and duplex mode for traffic between local ports and remote link partners. Supported speeds and duplex modes vary, depending on your hardware.

Before you begin

You must enable Auto-Negotiation before you perform this procedure.

About this task

Configure local port Auto-Negotiation advertisements.

Procedure

Enter GigabitEthernet Interface Configuration mode:

enable

configure terminal

interface GigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...]}

Note

If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.
Configure Auto-Negotiation advertisements on one or more ports:
auto-negotiation-advertisements {25000-full|10000-full|2500-full|5000-full|1000-full|100-full|100-half|10-full|10-half}
or
auto-negotiation-advertisements port {slot/port[/sub-port][-slot/port[/sub-port]][,...]}] {25000-full|10000-full|2500-full|5000-full|1000-full|100-full|100-half|10-full|10-half}
Verify the configuration:

show interfaces gigabitEthernet l1-config [{slot/port[/sub-port][-slot/port[/sub-port]][,...]}]

Variable Definitions

The following table defines parameters for the auto-negotiation-advertisements command.


Variable	Value
`{slot/port[/sub-port] [-slot/port[/sub-port]] [,...]}`	Specifies the port or ports that you want to configure.
25000-full	Advertises 25 Gbps full-duplex.
10000-full	Advertises 10 Gbps full-duplex.
5000-full	Advertises 5 Gbps full-duplex.
2500-full	Advertises 2.5 Gbps full-duplex.
1000-full	Advertises 1 Gbps full-duplex.
100-full	Advertises 100 Mbps full-duplex.
100-half	Advertises 100 Mbps half-duplex.
10-full	Advertises 10 Mbps full-duplex.
10-half	Advertises 10 Mbps half-duplex.
none	Configures the Auto-Negotiate value to none.