You can determine the speed and duplex settings for a port on a Cisco switch
with the show interfces port_designation status. E.g.:
Huron>show interfaces fa0/1 status Port Name Status Vlan Duplex Speed Type Fa0/1 connected 1 full 10 10/100BaseTX Huron>
Often ports will be set to
autonegotiate the speed and duplex settings with the equipment connected
to the port. But sometimes that autonegotiation process may not work as
expected requiring you to manually set the parameters. E.g, if the piece
of equipment being connected to the port on the Cisco switch is configured
for a fixed mode of operation while the port on the switch is configured for
autonegotiate, the speeds may be configured for matching values on both sides
but there may be a
duplex mismatch. As a result of that mismatch
cyclic redundancy check (CRC) errors may be reported for the port on
the switch. You can manually set the duplex setting by entering the
enable command and then the enable password
when prompted. Then enter the configure command and then
enter duplex followed by full or half,
e.g., duplex full.
