3Com 3C16476BS-US - Baseline 2250 Plus Switch User Manual

Contents

If the Problem Persists 45The Switch supports full-duplex autonegotiation. Ifthe connected device does not support autonegotia-tion, ensure that it is configured for half-duplex oper-ation only. If the connected device hasautonegotiation disabled or overridden, and is config-ured as full-duplex, the Switch will configure the linkas half-duplex, causing a mismatch that will reducenetwork performance when data is transmitting andreceiving simultaneously on the same link.Ensure that the connected device has either:■ Autonegotiation enabled, or■ The ports are configured for half-duplex operationAll ports appear to show continual activity.There may be broadcast storms on the network.Remove port connections one at a time, waiting afew seconds between each port. If the LEDs go offafter removing a port connection, the device that wasconnected to that port is introducing an excessiveamount of broadcast frames to the network. Somepieces of network equipment operate by sending outbroadcast frames regularly.Refer to the documentation that accompanies thedevice for information on disabling the broadcastoperation.If the Problem PersistsIf the problem persists and the unit still does notoperate successfully, contact your 3Com networksupplier with the following information before return-ing the unit:■ Product number and serial number (printed on alabel supplied with the unit).■ A brief description of the issue