Command
Config-register
Use
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.
Syntax
R1(config)#config-register <value>
Optional values
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.
Example
In this example, we will change the configuartion register to 0x2142.
2611XM#show version | in 0x 2611XM#conf t |
To test this, we reloaded the 2611XM router and we see it booted with a default configuration.
2611XM(config)#do reload 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: If you require further assistance please contact us by sending email to 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 |