3Com 2226 User Guide - Page 45

Solving Corrupted Firmware, If the Problem Persists, All ports appear to show continual activity.

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Solving Corrupted Firmware 45 The Switch supports full-duplex autonegotiation. If the connected device does not support autonegotiation, ensure that it is configured for half-duplex operation only. If the connected device has autonegotiation disabled or overridden, and is configured 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. Refer to the documentation that accompanies the 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 automatically 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. 2 Access the Web interface. The Fail-Safe Mode screen appears, as shown in Figure 24. 3 Click Browse, and then follow the onscreen instructions to upgrade the Switch to the required version of firmware. To reset the Switch to its factory defaults, follow the instructions in "Resetting to Factory Defaults" on page 43. CAUTION: Before recovering the Switch, save the 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 returning the unit: ■ Product number and serial number (printed on a label supplied with the unit). ■ A brief description of the issue

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Solving Corrupted Firmware
45
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.
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.
Refer to the documentation that accompanies the
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.
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.
2
Access the Web interface. The Fail-Safe Mode screen
appears, as shown in
Figure 24
.
3
Click
Browse
, and then follow the onscreen instruc-
tions to upgrade the Switch to the required version of
firmware.
To reset the Switch to its factory defaults, follow the
instructions in
“
Resetting to Factory Defaults
”
on
page 43
.
CAUTION:
Before recovering the Switch, save the
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:
■
Product number and serial number (printed on a
label supplied with the unit).
■
A brief description of the issue