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 Confreg?
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.
How do I change the configuration register on a Cisco router?
To change the configuration register settings from the Cisco IOS CLI, complete the following steps:
- Connect a terminal or PC to the router console port.
- Configure your terminal or terminal emulation software for 9600 baud (default), 8 data bits, no parity, and 2 stop bits.
- Power on the router.
What is Rommon mode in Cisco router?
The ROM Monitor (ROMMON) is a bootstrap program that initializes the hardware and boots the Cisco IOS XE software when you power on or reload a router. If your router does not find a valid system image to load when it is booting, the system enters the ROMMON mode.
How will you view the router configuration register?
To view the current setting of the configuration register, establish a console or Telnet session with the router. Issue the show version command, and input the contents into the Output Interpreter.
What is the factory default setting for the configuration register on Cisco routers?
What is the factory default setting for the configuration register on Cisco routers? Explanation: The default configuration register setting on a Cisco router is 0x2102. This can be seen by executing the command router# show version.
What is configuration register in Cisco router?
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.
How can I see my configuration register?
What is the default config register for the 3750?
08-24-2009 03:49 PM The config register on the 3750 (and other desktop switches) is fixed at 0xF. It cannot be changed, but it is analogous to 0x2102 on other platforms in that it causes the switch to boot from flash, and load the saved config.text.
How do I set baud rates for different confreg values?
Check table1 to set baud rates for different Confreg values. The configuration register can be set from configuration mode using the config-register command. From ROMmon, use the confreg command. Issue the show version command to view the current setting of the configuration register:
How do I troubleshoot the configuration register 0x2102?
Booting into ROMmon. Change the configuration register to an appropriate setting, such as the factory default 0x2102, in order to solve these problems. If the configuration register value is not known, try to establish a Telnet or console session with the router.
What is the range of configconfig-Register?
Config-Register is basically a hexadecimal or decimal value that represents the 16-bit configuration register value that will be used the next time the switch is restarted. The value range is from 0x0 to 0xFFFF (0 to 65535 in decimal).
