3Com 4200G Getting Started Manual

Also see for 4200G Series: Product guide Quick reference guide Datasheet Installation guide Product guide

Contents

60 CHAPTER 4: PROBLEM SOLVINGIf a fan failure warning message is generated:1 Power off the unit.2 Check that the air vents are not obstructed.3 Power cycle the unit. To do this, remove and reconnect the AC mainssupply. If another fan failure warning message is generated using theCommand Line Interface or the Web interface, return the unit to 3Com.Unit fails, no SNMP fan failure message is received1 Power cycle the unit. To do this, remove and reconnect the AC mainssupply.2 Check the command line interface (display logbuffer command)to determine whether a thermal shutdown has occurred. If not, returnthe unit. If it has occurred, check that:■ The air vents are not obstructed.■ The ambient temperatures and environmental conditions meet thosespecified in Appendix .3 Power cycle the unit. If a further thermal shutdown occurs, and allenvironmental conditions are satisfactory, return the unit to 3Com.Error message indicating that the SFP transceiver is invalidThe switch has identified that the SFP does not meet the minimumrequirements for the switch and has disabled the port. To correct thisproblem, completely remove the SFP and replace it with a 3Comapproved SFP. See “Approved SFP Transceivers” on page 26.Error message indicating that the SFP transceiver is faultyTo correct this problem, completely remove the SFP and then reinsert it.Alternatively, insert another identical SFP. If the problem persists, contact3Com Technical Support.SolvingCommunicationProblemsIf you experience communication problems with the switch, ensure that:■ The switch’s IP address and Management VLAN ID is configured.■ If the switch is separated from your management application by arouter, ensure that the default gateway IP address within the switch isthe same as the IP address of the router.