Intel 480T, User Manual

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C H A P T E R 4 Configuring Switch Ports
Configuring Port Speed and Duplex
Setting
By default, the switch is configured to use autonegotiation to
determine the port speed and duplex setting for each port. You can
select to manually configure the duplex setting and the speed of
100/1000 Mbps ports, and you can manually configure the duplex
setting on Gigabit Ethernet ports.
All ports on the switch can be configured for half-duplex or full
duplex operation. Fast Ethernet ports can connect to either
100BASE-T or 1000BASE-TX networks. By default, the ports
autonegotiate port speed. You can also manually configure a 100/
1000 Mbps port for 100 Mbps operation.
Gigabit-only Ethernet ports are statically set to 1 Gbps, and their
speed cannot be modified.
All ports on the switch, except the Gigabit-only Ethernet ports
(GBICs) can be configured for half-duplex or full duplex operation.
By default, the ports autonegotiate the duplex setting.
To configure port speed and duplex setting, use the following
command:
config ports <portlist> auto off {speed [10 | 100
| 1000]} duplex [half | full]
To configure the switch to autonegotiate, use the following
command:
config ports <portlist> auto on
Flow control is supported only on Gigabit Ethernet ports. It is
enabled or disabled as part of autonegotiation. If autonegotiation is
set to off, flow control is disabled. When autonegotiation is turned
on, flow control is enabled.
Turning Off Autonegotiation for a Gigabit
Ethernet Port
In certain interoperability situations, it is necessary to turn
autonegotiation off on a Gigabit Ethernet port. Even though a
Gigabit Ethernet port runs only at full duplex and gigabit speeds, the
command that turns off autonegotiation must still include the
duplex setting.