3Com OfficeConnect 140M User Manual

Also see for OfficeConnect: Datasheet Datasheet Getting started guide User guide User guide

Contents

3Com OfficeConnect 140M User Manual Manual pdf 80 page image

6-2 C HAPTER 6: P ROBLEM SOLVINGSolving Problems With the SwitchPower LED not lit. Check your power adapterconnection. If there is still no power, you may have afaulty power adapter which needs replacing withanother OfficeConnect power adapter. Do not useany other power adapter with the switch.Alert LED remains lit after self-test. Power off theswitch, wait about five seconds and then power onthe switch so that it performs its self-test again. Ifthe Alert LED still remains lit after self-test, there is aproblem with the switch. Contact your supplier.Alert LED continually lit during use. Use the AlertLED page in the web interface to see what conditionis causing it to light, refer to “Alert LED” onpage 4-12.If you are trying to view the Alert LED page over thenetwork but cannot communicate with the switch, itmay be because of a broadcast storm (excessiveamounts of broadcast frames). Try to communicatethrough the console port instead.If the Alert LED page shows that Broadcast Traffic orError Rate conditions are causing the Alert LED thelight, it may be that there is:n A network loop — Each piece of equipmentneeds only one connection to your switch.n Excessive amounts of broadcast frames — Somepieces of network equipment operate by sendingout broadcast frames regularly. Refer to thedocumentation that accompanies the piece ofnetwork equipment.To isolate the port on which the problem is occuring,remove the port connections one at a time (startingwith the 100BASE-TX port), waiting about a minutebetween each port. If the Alert LED goes off, youhave found the port.If the Alert LED is still lit after removing all of yourconnections, there may be a problem with yourswitch. Power it off, wait about 5 seconds and thenpower it on. If the Alert LED comes back oncontinually, contact your supplier.