What is the use of Configuration Register in Cisco Router or Switch

Use of the Configuration Register in Cisco Router or Switch

The configuration register can be used to change Cisco Router behavior in different ways like How Router boots, Router booting process and Console speed etc. Find below some reasons to change the configuration register settings on Cisco Router.

  • To recover a lost password
  • To force the system into the ROM monitor or boot ROM
  • To select a boot source and default boot filename
  • To enable or disable the Break function
  • To control broadcast addresses
  • To set the console terminal baud rate
  • To load operating software from Flash memory
  • To enable booting from a Trivial File Transfer Protocol (TFTP) server
  • To manually boot the system using the boot command at the bootstrap program prompt.
  • To force the switch router to boot automatically from the system bootstrap software (boot image) or from its default system image in onboard Flash memory, and read any boot system commands that are stored in the configuration file in NVRAM
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