Accessing GRUB Mode
Perform the following step to access GRUB mode:
SUMMARY STEPS
1.
enable
2.
config-register 0x0000
DETAILED STEPS
Purpose
Command or Action
Enables privileged EXEC mode.
enable
Step 1
Example:
Router> enable
•
Enter your password if prompted.
Enters the GRUB mode by entering the
“
0000
”
value (0x0).
config-register 0x0000
Example:
Router# config-register 0x0000
Step 2
What to Do Next
The following shows an example of entering GRUB mode.
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>
If you enter a question mark at the grub> prompt, the system shows you the two options available, for either
viewing the system help or for entering the
confreg
command.
Using the GRUB Menu
The GRUB menu is used to display the software images loaded on the router, and to select which image to
boot from. To access the GRUB menu, enter
ESC
at the GRUB prompt. The following shows the GRUB
menu display.
GNU GRUB
version 0.97
(638K lower / 3143616K upper memory)
Cisco CSR 1000v Series Cloud Services Router Software Configuration Guide
223
Accessing and Using GRUB Mode
Accessing GRUB Mode