Cisco Systems 7200 VXR manual Configuration Register Information, Configuration Bit Meanings

A P P E N D I X A

Configuration Register Information

The following information is found in this appendix:

•Configuration Bit Meanings, page A-1

•Displaying the Configuration Register While Running Cisco IOS, page A-5

•Displaying the Configuration Register While Running ROM Monitor, page A-5

•Setting the Configuration Register While Running Cisco IOS, page A-6

•Setting the Configuration Register While Running ROM Monitor, page A-6

Configuration Bit Meanings

Use the processor configuration register information contained in this appendix to do the following:

•Set and display the configuration register value

•Force the system into the bootstrap program

•Select a boot source and default boot filename

•Enable or disable the Break function

•Control broadcast addresses

•Set the console terminal baud rate

•Load operating software from ROM

•Enable booting from a Trivial File Transfer Protocol (TFTP) server

Table A-1lists the meaning of each of the configuration memory bits. Following the table is a more in-depth description of each setting.

		Table A-1	Configuration Register Bit Settings
		Bit No.	Hex	Meaning
		00–03	0x0000–0x000F	Boot field
06			0x0040	Causes the system software to ignore nonvolatile random-access
				memory (NVRAM) contents
07			0x0080	Original Equipment Manufacturer (OEM) bit enabled
08			0x0100	Break disabled
10			0x0400	IP broadcast with all zeros
				Cisco 7200 VXR Installation and Configuration Guide
	OL-5013-09				A-1