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8
T
ROUBLESHOOTING
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 D.
Solving Common
Problems
The following problems may arise while working with the CoreBuilder
TM
7000 family ATM switch. If your problem does not appear on this list,
view relevant statistics and parameters using the Administration Console
menus (refer to
CoreBuilder 7000 family ATM switches User Guide
). You
can also contact 3Com Technical Support. Also, be sure to read through
the release notes.
Table 8-1
Recommended Action for Common Problems
Problem Recommended Action
Terminal does not
show anything
If the control terminal is physically connected to the CoreBuilder 7000 family ATM switch,
but does not load the Administration Console Menus, verify that your terminal setup
matches the specifications (see “Connecting the Control Terminal” on page 4-19). Also,
make sure your cable is configured as DCE (see “Ethernet Cabling” on page E-11).
Port cables do not
work
If the cables attached to the CoreBuilder 7000 family ATM switch interface ports do not
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.