The factory-default setting for the configuration register is 0x2102. This indicates that the router should attempt to load a Cisco IOS software image from Flash memory and load the startup configuration.
What is configuration register?
Configuration Register is a special 16 bits value that can be configured in Cisco routers. It is mainly used in three cases; To determine how the router boots. To determine boot options. To set console speed.
What is config register 0x102?
The most common configuration register settings are 0x102 and 0x2102. When the configuration register is set to 0x0102, it has the Break key disabled when the router is operating, and it looks into the configuration to determine the boot sequence.
What is the default configuration register setting?
By default, the configuration register is set to load the Cisco IOS from flash memory and to look for and load the startup-config file from NVRAM. In the following sections, I am going to discuss the configuration register settings and how to use these settings to provide password recovery on your routers.
What does the command Confreg 0x2142 provide?
Explanation: The default configuration setting is 0x2102, which tells the router to load the IOS from flash and the configuration from NVRAM. 0x2142 tells the router to bypass the configuration in NVRAM so that you can perform password recovery.
What is configuration register in Cisco switch?
Cisco IOS routers and switches use a configuration register for some specific settings. These are settings that are not stored in the startup or running configuration. There are 16 bits (4 hexadecimal digits) reserved for the configuration register.
What is Confreg 0x2102?
The factory default setting for the configuration register is 0x2102. This indicates that the router should attempt to load a Cisco IOS Software image from Flash memory and load the startup configuration with a console speed of 9600 baud.
How configure config register in ROMmon?
How configure config register in ROMmon?
Boot into the ROMmon mode.Change the configuration register such that the startup config is not loaded.Boot into IOS.Go to the privileged exec mode and copy startup config to running config.Change the passwords.Save the running config to startup config.
What is config register 0x142?
The 4 in 0x142 tells the device to ignore the startup config at boot time. This is why it has not seemed to retain the startup config. I suggest that you go ahead and reload. If the config register is then set to 0x102 then the startup config should work as expected.
How do I reset my Cisco 2800 router password?
Method 2
xhut the router down.Remove the compact flash from the back of the router.Turn the router back on.When you see the Rommon1> prompt, enter the command of confreg 0x2142.Insert the compact flash.Type reset.When prompted to enter the initial configuration, type no and press enter.
Why might a network administrator set the configuration register to 0ã 2142 on a 2600 series Cisco router?
Explanation: The default configuration setting is 0x2102, which tells the router to load the IOS from flash and the configuration from NVRAM. 0x2142 tells the router to bypass the configuration in NVRAM so that you can perform password recovery.
What is the factory default value of the configuration register?
The factory-default setting for the configuration register is 0x2102. This indicates that the router should attempt to load a Cisco IOS® software image from Flash memory and load the startup configuration with a console speed of 9600 baud.
Why would a router boots and enters the setup mode?
First, why does a router go into Setup Mode in the first place? When a Cisco router boots up, the router looks into Non-Volatile RAM (NVRAM) for the startup configuration file. If such a file is not found, and the router has not been programmed to look to a TFTP server for this file, the router enters setup mode.
What message would you expect to see when the router boots?
When the router boots, it looks for the IOS image in the following locations: ROM, Flash, Locations specified by the boot system statement in startup-config, Default TFTP server.
What is configuration register value?
The Configuration Register. When a router starts up it needs to know which software to load and which configuration file to use. The way it determines these two things is by looking at its configuration register setting and its startup configuration in nonvolatile RAM (NVRAM).
What is boot system command?
The boot system command allows you to specify not only which IOS images to boot from, but also the order to try them in if it has trouble booting. In the example, this router will try a succession of three different IOS images. If they all fail, it will resort to using its boot ROM image.
What command do you type to save the configuration stored in NVRAM to TFTP server?
Use the copy nvram:startup-config {ftp: | rcp: | tftp:} command to copy the startup configuration file to a network server. The configuration file copy can serve as a backup copy.
