3Com 7000 manual Troubleshooting, Problem, Recommended Action

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TROUBLESHOOTING

This chapter explains how to troubleshoot specific problems you may encounter during power-on and system operation. It also shows how to perform related diagnostic tasks, such as replacing fuses or cleaning fiber optic cables.

If you experience problems that are not addressed in this chapter, contact 3Com Technical Support (see Appendix E).

Solving Common The following problems may arise while working with the CoreBuilder®

Problems7000 family ATM switch. If your problem does not appear on this list, view relevant statistics and parameters using the Administration Console menus (refer to the CoreBuilder 7000 Family ATM Switches Management Guide). You can also contact 3Com Technical Support. Also, be sure to read through the release notes.

Table 13 Recommended Action for Common Problems

Problem	Recommended Action
Terminal does not	If the control terminal is physically connected to the CoreBuilder 7000 family ATM switch,
show anything	but does not load the Administration Console Menus, verify that your terminal setup
	matches the specifications (see “Connecting the Control Terminal” on page 46). Also,
	make sure your cable is configured as DCE (see “Ethernet Cabling” on page 118).
Port cables do not	If the cables attached to the CoreBuilder 7000 family ATM switch interface ports do not
work	work, check that the connectors are firmly snapped in place. Also, make sure that each
	wire connects to Rx on one end and Tx on the other.
ACT LED not blinking	When the CoreBuilder 7000 family ATM switch is activated, the switch module and
	interface cards ACT LEDs should be blinking. If not, verify that the switch module and
	interface cards are properly inserted. Make sure that the control terminal is connected to
	the control port correctly, as an incorrect connection of this cable sometimes results in the
	inability of the system to function properly.