Common questions

How do I get my router out of Rommon mode?

How do I get my router out of Rommon mode?

If your router gets stuck in ROMmon mode during the boot process, examine the value of the configuration register by entering the confreg command. Change the value of the configuration register as shown below to stop the router to go into the ROMmon mode after reloading.

How do I reset my Rommon password?

Step-by-Step Procedure

  1. Either switch off or shut down the router.
  2. Remove the compact flash that is on the rear of the router.
  3. Switch on the router.
  4. Once the router is on Rommon mode, reinsert the compact flash.
  5. Type confreg 0x2142 at the rommon 1> prompt in order to boot from Flash.
  6. Type reset at the rommon 2> prompt.

How do you enter Rommon mode?

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 is 0x2142 config register?

Configuration register is 0x2142. In this example, the configuration register shows 0x2142. The router bypasses the startup configuration stored in NVRAM during its boot sequence. This feature is normally used during a password recovery procedure.

How do I exit Cisco Rommon mode?

You’ll need to re-set the configuration register to it’s original value (usually 0x2102 or 0x102) and re-boot. To do, this boot up into rommon mode, just type ‘config-register 0x2102’ from the prompt. Reset the router and you should be good to go.

Why is Cisco router on Rommon mode?

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 do I reset my Cisco 3900 router password?

Type “config t” at the prompt and press “Enter.” At the “Router(config)#” prompt, type “enable secret ” — where “pswd” is the password — and press “Enter.” At this point, your enable password is reset.

What does the command Confreg 0x2142 provide?

What does the command confreg 0x2142 provide? A. It is used to restart the router.

How send Ctrl break in PuTTY?

The traditional key sequence for sending this signal from a PC keyboard is Ctrl-Break. Currently, this sends ^C in PuTTY. It doesn’t seem like a great loss to reassign it to sending a “break” signal. The previous behaviour of the Ctrl-Break key sequence can be accessed using Ctrl-C.

What does Confreg 0x2102 do?

The default value of Config Register is 0x2102. With Configuration Register 0x2102 value, the router boots from NVRAM and the normal router precedures works. The configuration stored in NVRAM is the startup configuration. At the output of “show version” command, Configuration Register value will be at the bottom.

What is Cisco Rommon mode?

ROMMON mode is a router mode, not a mode within the Cisco IOS XE software. The ROMMON software and the Cisco IOS XE software are two separate programs that run on the same router. At any given time, the router is running one of these programs, but it never runs both at the same time.

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