Accessing Grub Mode; Using The Grub Menu - Cisco CSR 1000v Series Software Configuration Manual

Accessing and Using GRUB Mode

Accessing GRUB Mode

Perform the following step to access GRUB mode:
SUMMARY STEPS
1. enable
2. config-register 0x0000
DETAILED STEPS
Command or Action
Step 1
enable
Example:
Router> enable
Step 2
config-register 0x0000
Example:
Router# config-register 0x0000
What to Do Next
The following shows an example of entering GRUB mode.
Router(config)# config-register 0x0000
GNU GRUB
[ Minimal BASH-like line editing is supported.
lists possible command completions.
completions of a device/filename.
grub> help
[ Minimal BASH-like line editing is supported.
lists possible command completions.
completions of a device/filename.
confreg [VALUE]
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)
version 0.97 (638K lower / 3143616K upper memory)
Cisco CSR 1000v Series Cloud Services Router Software Configuration Guide
Purpose
Enables privileged EXEC mode.
• Enter your password if prompted.
Enters the GRUB mode by entering the "0000" value (0x0).
For the first word, TAB
Anywhere else TAB lists the possible
ESC at any time exits to menu. ]
For the first word, TAB
Anywhere else TAB lists the possible
ESC at any time exits to menu. ]
help [--all] [PATTERN ...]
Accessing GRUB Mode
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