3com 2226 PLUS Guia Do Utilizador
Solving Corrupted Firmware
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The Switch supports full-duplex autonegotiation. If
the connected device does not support autonegotia-
tion, ensure that it is configured for half-duplex oper-
ation only. If the connected device has
autonegotiation disabled or overridden, and is config-
ured as full-duplex, the Switch will configure the link
as half-duplex, causing a mismatch that will reduce
network performance when data is transmitting and
receiving simultaneously on the same link.
the connected device does not support autonegotia-
tion, ensure that it is configured for half-duplex oper-
ation only. If the connected device has
autonegotiation disabled or overridden, and is config-
ured as full-duplex, the Switch will configure the link
as half-duplex, causing a mismatch that will reduce
network performance when data is transmitting and
receiving simultaneously on the same link.
Ensure that the connected device has either:
■
Autonegotiation enabled, or
■
The ports are configured for half-duplex operation
All ports appear to show continual activity.
There may be broadcast storms on the network.
Remove port connections one at a time, waiting a
few seconds between each port. If the LEDs go off
after removing a port connection, the device that was
connected to that port is introducing an excessive
amount of broadcast frames to the network. Some
pieces of network equipment operate by sending out
broadcast frames regularly.
Remove port connections one at a time, waiting a
few seconds between each port. If the LEDs go off
after removing a port connection, the device that was
connected to that port is introducing an excessive
amount of broadcast frames to the network. Some
pieces of network equipment operate by sending out
broadcast frames regularly.
Refer to the documentation that accompanies the
device for information on disabling the broadcast
operation.
device for information on disabling the broadcast
operation.
Solving Corrupted Firmware
If the firmware becomes corrupted, you must either:
■
Upgrade the firmware for the Switch
■
Reset the Switch to factory defaults
When the firmware is corrupted, the Switch automat-
ically goes into Fail-Safe mode.
ically goes into Fail-Safe mode.
To upgrade a corrupted firmware:
1
Download the latest firmware from the 3Com Web
site to the computer that you are using to access the
Web interface.
site to the computer that you are using to access the
Web interface.
2
Access the Web interface. The Fail-Safe Mode screen
appears, as shown in
appears, as shown in
.
3
Click Browse, and then follow the onscreen instruc-
tions to upgrade the Switch to the required version of
firmware.
tions to upgrade the Switch to the required version of
firmware.
To reset the Switch to its factory defaults, follow the
instructions in
instructions in
CAUTION: Before recovering the Switch, save the
Switch’s current configuration. Recovering the Switch
will cause the current configuration to be lost.
Switch’s current configuration. Recovering the Switch
will cause the current configuration to be lost.
If the Problem Persists
If the problem persists and the unit still does not
operate successfully, contact your 3Com network
supplier with the following information before return-
ing the unit:
operate successfully, contact your 3Com network
supplier with the following information before return-
ing the unit:
■
Product number and serial number (printed on a
label supplied with the unit).
label supplied with the unit).
■
A brief description of the issue