Details Of The Password Recovery Procedure - Cisco ASR 1000 series Hardware Installation Manual

Replacing or Recovering a Lost Password
If you are going to power cycle a Cisco ASR 1013 Router, we recommend that you first perform a
Caution
graceful reload on the router. Power cycling the router without first performing a graceful reload might
cause a loss of data stored in the NVRAM. In other words, the configuration file might be lost. Note that
this is not observed when a power failure occurs because each active power supply in the two power
supply zones is power cycled at the same time during a power failure. If there is a chance that the router
might be power cycled without a graceful reload, we recommend that you use the boot config
file-system:configuration-file nvbypass command to specify a file system other than the NVRAM for
storing the configuration file. The following are examples:
Router(config)#
Router(config)#
Change the configuration register so the following functions are enabled:
Step 3
a.
b.
c.
Note
Power cycle the router by turning power off and then back on.
Step 4
Note
Log in to the router and enter the privileged EXEC mode.
Step 5
Enter the show startup-config command to display the passwords.
Step 6
Recover or replace the displayed passwords.
Step 7
Change the configuration register back to its original setting.
Step 8

Details of the Password Recovery Procedure

Perform the following steps to recover or replace a lost enable, enable secret, or console login password:
Step 1 Attach an ASCII terminal to the console port on your router.
Configure the terminal to operate at 9600 baud, 8 data bits, no parity, and 1 stop bit (9600 8N1).
Step 2
If you can log in to the router as a nonprivileged user, enter the show version command to display the
Step 3
existing configuration register value. Note the value for use later and proceed to Step 6. If you cannot
log in to the router at all, go to the next step.
Step 4 Press the Break key or send a Break from the console terminal. If Break is enabled, the router enters the
ROM monitor, indicated by the ROM monitor prompt (rommon1>). Proceed to Step 6. If Break is
disabled, power cycle the router (turn the router off or unplug the power cord, and then restore power
after waiting 30 seconds). Then proceed to Step 5.
Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation Guide
C-10
boot config harddisk:config_file.cfg nvbypass
boot config bootflash:configuration_data.cfg nvbypass
Break
Ignore startup configuration
Boot from flash memory
The key to recovering a lost password is to set the configuration register bit 6 (0x0040) so that
the startup configuration (usually in NVRAM) is ignored. This allows you to log in without
using a password and to display the startup configuration passwords.
When powering off the router, wait for 30 seconds before powering it on again.
Appendix C Troubleshooting Initial Startup Problems
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