Cisco Systems 7401ASR Configuration Bit Meanings, Following information is found in this appendix

A P P E N D I X D

Configuration Register Information

The following information is found in this appendix:

•Configuration Bit Meanings, page D-1

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

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

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

•Setting the Configuration Register While Running ROM Monitor, page D-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 D-1lists the meaning of each of the configuration memory bits. Following the table is a more in-depth description of each setting.

Table D-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	OEM (original equipment manufacturer) bit enabled
08			0x0100	Break disabled
10			0x0400	IP broadcast with all zeros
				Cisco 7401ASR Installation and Configuration Guide
	OL-5419-01 B0				D-1