Recovering A Lost Password - Cisco 12406 Installation And Configuration Manual

Chapter 4 Troubleshooting the Installation

Recovering a Lost Password

Note
Step 1
Step 2
Step 3
Step 4
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Bit 13—Bit 13 of the software configuration register determines the system
response to a bootload failure. Setting bit 13 causes the system to load Cisco IOS
software from Flash memory after five unsuccessful attempts to load a boot file
from the network TFTP server. Clearing bit 13 causes the system to continue
attempting to load a boot file from the network TFTP server indefinitely. Bit 13 is
set to 0 as the default at the factory.
This section provides information on how to recover a lost password.
If the enable password is encrypted, the following procedure will not work for
password recovery, and you will have to reconfigure the system before attempting
a reboot. To reconfigure the system, use the displayed configuration, which is
shown using the show startup-config command in privileged EXEC mode,
shown in Step 11.
To recover a lost password, follow these steps:
Attach an ASCII terminal to the RP console port.
Configure the terminal to operate at 9600 bps, 8 data bits, no parity, 2 stop bits (or
whatever settings the console port is set to).
Enter the show version command at the privileged EXEC mode prompt to display
the existing software configuration register value.
Router# show version
.
.
.
The current configuration setting appears in the last line of the show version
command output. Write this value on paper for use in Step 13.
If the Break function is disabled, turn off power to the power supplies, wait
5 seconds, then restore power.
If the Break function is enabled, press the Break key or send a break by holding
down the Control key and pressing the right square bracket key (Ctrl-]).
Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
Performing Other Configuration Tasks
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