how to recover cisco router from rommon mode

If your router keeps entering the ROMmon mode each time the system is restarted, it is probably due to the setting of the configuration register. For more information on the software configuration register bit meanings, see Configuring the Software Configuration Register.

If the value of the boot field is 0 (configuration register value of XXX0), on startup the system enters and remains in the ROM monitor mode (rommon>), awaiting a user command to boot the system manually. The value of the boot field defines the source of a default Cisco IOS® software image that will be used to run the router. The first four bits of the configuration register comprise the boot field. If the router is stuck in ROMmon mode, the first setting that should be checked is the value of the configuration register. If you are working in a live network, ensure that you understand the potential impact of any command before using it. All of the devices used in this document started with a cleared (default) configuration. The information presented in this document was created from devices in a specific lab environment.

This document is not restricted to specific software and hardware versions. There are no specific prerequisites for this document. Before You Begin Conventionsįor more information on document conventions, see the Cisco Technical Tips Conventions. This page explains how to recover a Cisco 2600 Series Router and a VG200 stuck in ROMmon ( rommon#.

How to recover cisco router from rommon mode