3Com 2226 PLUS - Manual (Page 73)

If the Problem Persists 73
The Link/Activity LED is on, but network
performance is poor
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.
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