3com 2848-sfp plus Guia Do Utilizador
32
C
ONFIGURING
THE
S
WITCH
periods of high traffic. Flow control is enabled by
default.
default.
■
Speed Duplex – Sets the speed and duplex mode of
the port. Available options include auto, 10
half-duplex, 10 full-duplex, 100-half duplex, and 100
full-duplex. For 1000 Mbps connections, see
“Speed/Duplex for 1000 Mbps Connections” on
page 32.
the port. Available options include auto, 10
half-duplex, 10 full-duplex, 100-half duplex, and 100
full-duplex. For 1000 Mbps connections, see
“Speed/Duplex for 1000 Mbps Connections” on
page 32.
Auto (or autonegotiation), which is enabled by
default, sets the optimum combination of speed and
duplex that can be supported by both ends of the
link.
default, sets the optimum combination of speed and
duplex that can be supported by both ends of the
link.
■
Priority - Sets the priority of the port. Available
options include high, intermediate, standard, or low.
options include high, intermediate, standard, or low.
If you modify any of these basic port settings, click
Apply to save your changes.
Apply to save your changes.
Figure 11 Basic Port Configuration Screen
Speed/Duplex for 1000 Mbps Connections
You cannot preset the speed to 1000 Mbps. To run a
port at 1000 Mbps, you must enable autonegotiation
for the port. When autonegotiation is enabled, the
Switch will automatically connect at 1000 Mbps,
provided the connected device also supports this speed.
port at 1000 Mbps, you must enable autonegotiation
for the port. When autonegotiation is enabled, the
Switch will automatically connect at 1000 Mbps,
provided the connected device also supports this speed.
1000 Mbps connections are always full-duplex.
Half-duplex connections are only available for 10 Mbps
and 100 Mbps settings.
Half-duplex connections are only available for 10 Mbps
and 100 Mbps settings.
CAUTION: Before manually setting a port to full-duplex,
verify that the device connected to the port is also
manually set to the same speed and duplex setting. If
connecting link partners are left to autonegotiate for a
link manually set on this switch to full-duplex, they will
always negotiate to half-duplex, resulting in a duplex
mismatch. This can result in a significant reduction in
network performance. If you are unsure of how to
configure the speed/duplex setting, simply enable
autonegotiation for the port.
verify that the device connected to the port is also
manually set to the same speed and duplex setting. If
connecting link partners are left to autonegotiate for a
link manually set on this switch to full-duplex, they will
always negotiate to half-duplex, resulting in a duplex
mismatch. This can result in a significant reduction in
network performance. If you are unsure of how to
configure the speed/duplex setting, simply enable
autonegotiation for the port.
You cannot modify the speed/duplex settings of ports
that are members of a trunk or aggregated link.
that are members of a trunk or aggregated link.
Supported SFP transceivers only operate at 1000 Mbps
full-duplex. Inserting an SFP transceiver into a Gigabit
port disables the corresponding RJ-45 port, even if no
fiber cable is inserted.
full-duplex. Inserting an SFP transceiver into a Gigabit
port disables the corresponding RJ-45 port, even if no
fiber cable is inserted.