What is Confreg in a Cisco router?
What is Confreg in a Cisco router?
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.
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.
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 configuration register function?
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 the role of the configuration register?
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.
What is config Reg 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 boot start marker Cisco?
boot-start-marker and boot-end-marker are simply there to help us locate boot commands: for several years they weren’t present but boot system commands could be used in the same way. use. sh run | inc boot system.
What is config register 0xf?
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).
How do you break Rommon?
Press Break on the terminal keyboard within 60 seconds of power up in order to put the router into ROMMON. If the break sequence does not work, refer to Standard Break Key Sequence Combinations During Password Recovery for other key combinations. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.