What is a configuration register?
What is a 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 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.
What is config-register 0x2100?
For example, the command Router(config)# config-register 0x2100. configures the router to boot to ROM monitor mode.
What is config register 0x2?
**Configuration register value is 0x2**, enables instantaneous break into rommon.. this is not advisable as it will push the switch in to the rommon mode.. 0x0 (which tells it to go into rommon) The recommended mode is 0x2102… 0x102 tells it to boot from flash first.
What is Rommon mode in Cisco?
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.
What is CI register?
(Alias: configuration register) The register identifies and describes CIs, maintains CI status information, identifies specifications with which the CI must comply and indicates the CI’s position in the overall structure of the configuration by describing parent/child relationships with other CIs.
What is break sequence for Cisco?
A break signal enables you to access a ROM Monitor on Cisco IOS® devices when a password recovery is necessary.
How do I boot into Rommon?
To manually boot into the ROMmon mode, you will need to reboot the device and break the boot sequence. Pressing the Ctrl+Break key combination during boot usually does this.
What are different configuration modes in switch?
These are the main command modes for the switch:
- • User EXEC.
- • Privileged EXEC.
- • Global configuration.
- • Interface configuration.
- • Config-vlan.
- • VLAN configuration.
- • Line configuration.
