Cisco XR 12410 - Manual (Page 150)

Chapter 4 Troubleshooting the Installation
Troubleshooting the Processor Subsystem
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Cisco XR 12410 and Cisco XR 12810 Router Installation Guide
OL-17441-01
Pressing the reset switch causes a non-maskable interrupt (NMI) and places the
PRP in ROM monitor mode. When the PRP enters ROM monitor mode, its
behavior depends on the setting of the PRP software configuration register. For
example, if the boot field of the software configuration register is set to:
• 0x0—The PRP remains at the ROM monitor prompt (rommon>) and waits for
a user command to boot the system manually.
• 0x1—The system automatically boots the first Cisco IOS XR image found in
flash memory on the PRP.
PRP Alphanumeric Message Displays
The alphanumeric message displays are organized in two rows of four LED
characters each (
Figure 4-7 ).
Figure 4-7 Alphanumeric Message Displays—Partial Front Panel
The alphanumeric message displays show router status messages during the boot
process, and after the boot process is complete.
• During the boot process, the message displays are controlled directly by the
MBus module.
• After the boot process, the message displays are controlled by Cisco IOS XR
software (through the MBus).
H10780
PROCESSOR
Upper alphanumeric
LED display (four digits)
Lower alphanumeric
LED display (four digits)