Like a system, a router also requires an operating system called Internetworking Operating System (IOS) to function. If the operating system of a system can be corrupted due to a number of reasons, then why not an IOS be corrupted. Yes, it might be. So, how will you restore Cisco IOS?
You can recover Cisco IOS using the TFTP server. Since the IOS resides in the flash memory of the router, so first, you need to take the backup of IOS flash file on TFTP server and then you can restore the IOS from the flash file you have stored on TFTP server. In this post, we will explain, how to restore Cisco IOS from ROMMON mode using the TFTP server.
In order to restore Cisco IOS from ROMMON mode using TFTP server, we will use the Cisco Packet Tracer simulator. The same steps can be used to restore Cisco IOS for a physical router. First, create the following topology in Cisco Packet Tracer and configure the TCP/IP settings as mentioned in the topology.
Steps to Restore Cisco IOS from ROMMON Mode
- First, execute the show flash command to verify the name of the flash file and copy the file name.
- Next, execute the following commands to take the backup of the flash file on TFTP server. [Read more…]