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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Chapter 4 Troubleshooting the Installation
Performing Other Configuration Tasks
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.
Recovering a Lost Password
This section provides information on how to recover a lost password.
Note
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:
Step 1
Attach an ASCII terminal to the RP console port.
Step 2
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).
Step 3
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.
Step 4
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-]).
