Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
Troubleshooting Using the Line Card Alphanumeric Display
You can analyze the alphanumeric displays to isolate a problem with the line card. The two rows of the alphanumeric display are powered separately:
•The upper row receives power from the
•The lower row is powered directly from the MBus on the line card through the chassis backplane.
–If the lower row is not operating the MBus module may be malfunctioning.
–If the MBus module is operating, the lower row could be on even if the RP failed to powered on.
•If neither the upper or lower row is on, but the power modules and the blower modules are operational, the line card may not be installed properly, or the +5 VDC output from the chassis backplane is faulty.
–Make sure that the system is powered on.
–Initialize the line card by ejecting it from the chassis backplane and then reseating it.
•If both the upper and lower rows are operating, check the status messages (see Table
When the
| Table |
| Troubleshooting Using Alphanumeric Display Messages |
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| Display1 |
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| Meaning | Source | |
| MROM |
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| MBus microcode executing; where nnnn is the microcode | MBus controller | |
| nnnn |
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| version number. |
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| LMEM |
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| Low memory on the line card is being tested. | Line card ROM | |
| TEST |
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| monitor | |
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| LROM |
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| Low memory test is complete. | Line card ROM | |
| RUN |
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| monitor | |
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| BSS |
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| Main memory is being initialized. | Line card ROM | |
| INIT |
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| monitor | |
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| Cisco XR 12410 Router Installation Guide |
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