Cisco Systems EA6500 Manual De Usuario

The ports on both ends of a link must have the same setting. The link will not come up if the ports at 
each end of the link are set inconsistently (link negotiation enabled on one port and disabled on the other 
port).

 shows the four possible link negotiation configurations and the resulting link status for each 

configuration.

To configure link negotiation on a port, perform this task:

This example shows how to enable link negotiation on Gigabit Ethernet port 5/4:

Router(config)# interface gigabitethernet 5/4 

Router(config-if)# no speed nonegotiate 

To display the speed and duplex mode configuration for a port, perform this task:

This example shows how to display the speed and duplex mode of Fast Ethernet port 5/4:

Router# show interfaces fastethernet 5/4

FastEthernet5/4 is up, line protocol is up

  Hardware is Cat6K 100Mb Ethernet, address is 0050.f0ac.3058 (bia 0050.f0ac.3058)

  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 100Mb/s

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:33, output never, output hang never

Off

Off

Up

Up

On On

Up Up

Off

On

Up

Down

On Off

Down

Up

Router(config)# interface gigabitethernet 

slot/port 

Selects the port to be configured.

Router(config-if)# speed nonegotiate 

Disables link negotiation.

Router(config-if)# no speed nonegotiate 

Reverts to the default configuration (link negotiation 
enabled).

Router# show interfaces type

1

 slot/port 

1.

type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet 

Displays the speed and duplex mode configuration.