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If the Problem Persists 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.
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