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Chapter 4.
Troubleshooting
This chapter describes how to diagnose and solve problems that may arise with the
operation of an 6412M-25-TP module. These problems are signaled by the following
conditions:
The Port Status LED of a port does not light green, or is blinking, when idle
(connected and enabled but no traffic).
The Port Status LED of a port does not light yellow during data transmission.
The Reset LED is either ON or blinking.
The Wrong Slot LED is ON.
Before you start troubleshooting, be sure to carry out the procedure described in
“Verifying LED Operation.”
When instructed to replace an 6412M-25-TP module, proceed as described in
“Replacing 6412M-25-TP Modules” on page 4-10.
Verifying LED Operation
Before troubleshooting an 6412M-25-TP module, verify that all LEDs on the module are
functioning properly:
ONcore Press the LED Test button on the Fault-Tolerant Controller module in
the ONcore hub.
CELLplex 4000 Press the RESET button on the base unit. Note that this action will
interrupt all traffic and reset the CELLplex 4000.
All LEDs on the module should light ON. If not, replace the module (see page 4-10).
Note: The 155M LEDs will not light. These LEDs are reserved for future use.
Chapter 4. Troubleshooting 4-1