Cisco Systems 7200 VXR manual

Appendix A Configuration Register Information

Configuration Bit Meanings

in ROMmon. If bit 13 is not set, the router will continue to netboot images indefinitely. The default setting for bit 13 is 0. If bit 13 is set, the system boots the boot helper image found in boot flash memory without any retries.

The server creates a default filename as part of the automatic configuration processes. To form the boot filename, the server starts with Cisco and links the octal equivalent of the boot field number, a dash, and the image name. Table A-3lists the default boot filenames or actions.

Note A boot system configuration command in the router configuration in NVRAM overrides the default netboot filename.

Table A-3	Default Boot Filenames
Action/File Name		Bit 3	Bit 2	Bit 1	Bit 0
Bootstrap mode		0	0	0	0
ROM software		0	0	0	1
Flash software		0	0	1	0
cisco3-<image-name1>		0	0	1	1
cisco4-<image-name2>		0	1	0	0
cisco5-<image-name3>		0	1	0	1
cisco6-<image-name4>		0	1	1	0
cisco7-<image-name5>		0	1	1	1
cisco10-<image-name6>		1	0	0	0
cisco11-<image-name7>		1	0	0	1
cisco12-<image-name8>		1	0	1	0
cisco13-<image-name9>		1	0	1	1
cisco14-<image-name10>		1	1	0	0
cisco15-<image-name11>		1	1	0	1
cisco16-<image-name12>		1	1	1	0
cisco17-<image-name13>		1	1	1	1

Bit 6

Bit 6 causes the system software to ignore nonvolatile random-access memory (NVRAM) contents.

Bit 7

Bit 7 enables the OEM bit. It disables the bootstrap messages at startup.

Cisco 7200 VXR Installation and Configuration Guide

OL-5013-09 A-3