When auto-negotiation is disabled, the default speed-duplex setting is 100full
for 1000BASE-T ports.
Interface Configuration (Ethernet, Port Channel)
The 1000BASE-T standard does not support forced mode. Auto-negotiation
should always be used to establish a connection over any 1000BASE-T port or
trunk. If not used, the success of the link process cannot be guaranteed when
connecting to other types of switches. However, this switch does provide a
means of safely forcing a link to operate at 1000 Mbps, full-duplex using the
To force operation to the speed and duplex mode specified in a speed-duplex
command, use the
the selected interface.
When using the
settings will be determined by the
duplex mode under auto-negotiation, the required mode must be specified in
the capabilities list for an interface.
The following example configures port 5 to 100 Mbps, half-duplex operation.
Console(config)#interface ethernet 1/5
This command clears statistics on an interface.
clear counters interface
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-28/52)
port-channel channel-id (Range: 1-12)
– 301 –
command to disable auto-negotiation on
command to enable auto-negotiation, the optimal
command. To set the speed/
| Interface Commands