Cisco PRP-2 Installation And Configuration Manual page 76

Additional Configuration and Maintenance Tasks
You must reset or power cycle for the new config to take effect
Initialize the router by entering the i command as follows:
Step 7
Rommon 1> i
The router power cycles, the configuration register is set to ignore the configuration file, and the router
boots the boot system image and prompts you with the system configuration dialog as follows:
Enter no in response to the system configuration dialog prompts until the following system message is
Step 8
displayed:
Press RETURN to get started!
Step 9 Press Return.
After some interface information displays, the prompt appears as follows:
Router>
Enter the enable command to enter enabled mode.
Step 10
The prompt changes to the following:
Router#
Enter the show start-up config EXEC command to display the enable password in the configuration file.
Step 11
Enter the configure terminal command at the EXEC prompt.
Step 12
You are prompted as follows:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Change the configuration register value back to its original value (noted from
Change it to a value of 0x0102 (factory default) using the config-register 0x value command.
Step 13 Press Ctrl-Z or type end to exit configuration mode.
Step 14 Reboot the router and enable it using the recovered password.
Recovering Password for IOS XR
If the root password is forgotten, it can be recovered only at the DSC. To recover the password at the
DSC, set the configuration register to 0x42 on the active RP and reboot the router. When the router boots,
a password recovery dialog appears. This dialog prompts you to reset the root-system username and
password. After you save the new password, the configuration register automatically resets to the prior
value (such as 0x102).
This chapter also includes instructions to bypass ksh authentication on a node.
This chapter contains the following sections:
•
•
76
--- System Configuration Dialog ---
Recovering the Root Password on Single-RP Routers, page 77
Recovering the Root Password on Redundant-RP Routers, page 77
Step 3.)
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