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AT-9108, AT-8518, AT-8525, and AT-8550 User's Guide
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
10/100 Mbps ports, and you can manually configure the duplex
setting on Gigabit Ethernet ports.
Fast Ethernet ports can connect to either 10Base-T or 100Base-T
networks. By default, the ports autonegotiate port speed. You can
also configure each port for a particular speed (either 10 Mbps or 100
Mbps).
Gigabit Ethernet ports are statically set to 1 Gbps, and their speed
cannot be modified.
All ports on the switch 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]} 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
In certain interoperability situations, it is necessary to turn
Autonegotiation
autonegotiation off on a Gigabit Ethernet port. Even though a
Gigabit Ethernet port runs only at full duplex and gigabit speeds, the
for a Gigabit
command that turns off autonegotiation must still include the
Ethernet Port
duplex setting.
The following example turns autonegotiation off for port 4 (a Gigabit
Ethernet port);
config ports 4 auto off duplex full
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