3Com NETBUILDER II Installation Manual

Also see for NETBuilder II: Installation guide Installation guide Installation guide Installing Instruction

Contents

3Com NETBUILDER II Installation Manual Manual pdf 20 page image

3 TROUBLESHOOTING AND REPLACINGTHE MODULEThis chapter describes how to troubleshoot and replace the HSS RS-232 3-PortDTE/DCE module. Malfunctions that can occur include:n Self-test failure at startupn Inappropriate network connectionn Nonworking moduleTroubleshooting Table 3-1 describes common malfunctions that can occur with the module, possiblecauses, and actions to take. If you are unable to resolve a problem, contact yournetwork supplier. Refer to Appendix A for information about who to contact in yourarea.Table 3-1 Troubleshooting the HSS RS-232 3-Port DTE/DCE ModuleSymptom Cause and ActionThe following message is displayed at startup:HSS RS-232 3-Port Interface: SelfTests failed - slot X(The value of X can be 1 through 4 or 1 through 8,depending on which NETBuilder II chassis you have.)Self-test failuren Check to see if the card is inserted completely into the NETBuilder IIchassis.n Make sure there are no bent pins on the NETBuilder II backplane.n If you still have a self-test failure, contact your network supplier.The board has a physical interface to another serial deviceand the following message is displayed:Path 1 AvailablePath 1B AvailablePath 1C Availablebut the next message is not displayed:Path 1 UpPath 1B UpPath 1C UpIncomplete pathn Make sure the cable is securely attached.n If the cable is attached correctly and your paths are still not comingup, make sure there is a complete data path and correct clockingbetween both ends of the serial link. Check DSU/CSU and telcoconnections.The connection to a directly attached DTE device does notcome up.Misconfigurationn If the paths do not come up, check that your software configurationis correct, and make sure that the DTE-to-DCE configuration is correctand consistent with the software configuration.The STATUS LED is off when there is power to the systemand other installed modules are operating.Disabled modulen The module may not be properly connected to the NETBuilder IIbackplane. Remove and reinsert the module.n If it is still not working, replace the module.