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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Chapter 1 Product Overview
Alarm Card, Line Card, and Rout Processor Overview
GRP Reset Switch
Access to the (soft) reset switch is through a small opening in the GRP front panel.
To press the switch, insert a paper clip or similar small pointed object into the
opening (see Figure 1-13 on page 1-25).
Caution The reset switch is not a mechanism for resetting the GRP and reloading the
Cisco IOS image. It is intended for software development use only. To prevent
system problems or loss of data, use the reset switch only on the advice of Cisco
service personnel.
Pressing the reset switch causes a nonmaskable interrupt (NMI) and places the
GRP in ROM monitor mode. When the GRP enters ROM monitor mode, its
behavior depends on the setting of the GRP software configuration register. For
example, if the boot field of the software configuration register is set to:
• 0x0—The GRP 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 image found in
flash memory on the GRP.
For more information on the software configuration register, see the “Configuring
the Software Configuration Register” section on page 4-31.