Uploading Cisco IOS using XMODEM

Problem Statement

There are times when a router/switch can only boot up in ROMmon. This happens when the router/switch has no valid Cisco IOS software or bootflash image to boot from. This disaster recovery situation arises when, for example, the Cisco IOS software on the router/switch is corrupted or has crashed.

There are also cases where the router/switch has no USB port, or where it is not possible to set up a network connection with the router/switch, and hence using the Trivial File Transfer Protocol (TFTP) is not a solution.

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