This command is used to modify what configuration files the router reads as it is starting up.
This is most commonly used for password recovery purposes.
0x2102 This tells the router to startup normally, reading the config in NVRAM
0x2142 This tells the router to ignore the contents of NVRAM and load a default config.
In this example, we will change the configuartion register to 0x2142.
2611XM#show version | in 0x
To test this, we reloaded the 2611XM router and we see it booted with a default configuration.
program load complete, entry point: 0x80008000, size: 0x1c8a09c
Smart Init is enabled
If any of the above Memory Requirements are
Increasing IOMEM up to: 8Mb
Use, duplication, or disclosure by the Government is
cisco Systems, Inc.
Cisco IOS Software, C2600 Software (C2600-ADVENTERPRISEK9-M), Version 12.4(17), RELEASE SOFTWARE (fc1)
This product contains cryptographic features and is subject to United
A summary of U.S. laws governing Cisco cryptographic products may be found at:
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Cisco 2611XM (MPC860P) processor (revision 4.1) with 253952K/8192K bytes of memo ry.
— System Configuration Dialog —
Would you like to enter the initial configuration dialog? [yes/no]: no
Press RETURN to get started!
*Mar 1 00:00:07.584: %LINEPROTO-5-UPDOWN: Line protocol on Interface VoIP-Null0 , changed state to up
Slot is empty or does not support clock participate