Cisco ME 3400 Command Reference Manual page 627

Chapter 2 Cisco ME 3400 Ethernet Access Switch Cisco IOS Commands
Except for the 1000BASE-T SFP modules, if an SFP module port is connected to a device that does not
support autonegotiation, you can configure the speed to not negotiate (nonegotiate).
If the speed is set to auto, the switch negotiates with the device at the other end of the link for the speed
setting and then forces the speed setting to the negotiated value. The duplex setting remains as
configured on each end of the link, which could result in a duplex setting mismatch.
If both ends of the line support autonegotiation, we highly recommend the default autonegotiation
settings. If one interface supports autonegotiation and the other end does not, do use the auto setting on
the supported side, but set the duplex and speed on the other side.
Changing the interface speed and duplex mode configuration might shut down and re-enable the
Caution
interface during the reconfiguration.
Note For guidelines on setting the switch speed and duplex parameters, see the software configuration guide
for this release.
Examples This example shows how to set speed on a port to 100 Mbps:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# speed 100
This example shows how to set a port to autonegotiate at only 10 Mbps:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# speed auto 10
This example shows how to set a port to autonegotiate at only 10 or 100 Mbps:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# speed auto 10 100
You can verify your settings by entering the show interfaces privileged EXEC command.
Related Commands Command
duplex
show interfaces
OL-9640-07
Description
Specifies the duplex mode of operation.
Displays the statistical information specific to all interfaces or to a specific
interface.
Cisco ME 3400 Ethernet Access Switch Command Reference
speed
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