Cisco Systems CSR 1000V manual Confreg value, 11-4

Chapter 11 Accessing and Using GRUB Mode

Modifying the Configuration Register (confreg)

Note The modified configuration register value is automatically written into NVRAM, but the new value does not take effect until you reset or power-cycle the router.

SUMMARY STEPS

1. confreg [value]

DETAILED STEPS

	Command or Action	Purpose
Step 1 confreg [value]		Changes the configuration register settings while in
		GRUB command mode.
	Example:	• Optionally, enter the new hexadecimal value for
	grub> confreg 0x2102	the configuration register. The value range is
		from 0x0 to 0xFFFF.
		• If you do not enter the value, the router prompts
		for each bit of the 16-bit configuration register.

The following shows an example of entering GRUB mode and using the configuration register. You access the GRUB mode by entering the Cisco IOS XE config-registercommand and specifying the value as “0000”.

Router(config)# config-register 0x0000

GNU GRUB version	0.97 (638K lower / 3143616K upper memory)
[ Minimal BASH-like line		editing is supported.		For the first word, TAB
lists possible	command	completions.	Anywhere	else TAB lists the possible
completions of	a device/filename.		ESC at any	time exits to menu. ]
grub> help
[ Minimal BASH-like line		editing is supported.		For the first word, TAB
lists possible	command	completions.	Anywhere	else TAB lists the possible
completions of	a device/filename.		ESC at any	time exits to menu. ]
confreg [VALUE]			help [--all] [PATTERN ...]

grub> confreg

Configuration Summary

(Virtual Configuration Register: 0x0) enabled are:

boot: the boot loader

do you wish to change the configuration? y/n [n]: ignore system config info? y/n [n]: automatically boot default system image? y/n [n]:

Configuration Register: 0x0

grub> confreg

	Configuration Summary
	(Virtual Configuration Register: 0x0)
	enabled are:
	boot: the boot loader
	Cisco CSR 1000V Series Cloud Services Router Software Configuration Guide
11-4	OL-27477-07