Rommon 18 > DEFAULT_GATEWAY=10.1.1.2 !- Use the IP address of the TFTP server. Rommon 17 > IP_SUBNET_MASK=255.255.255.0 !- Same as on the TFTP server.

The following example shows how to perform a tftpdnld ROMmon command recovery procedure with a TFTP server at the 10.1.1.2 address, a 255.255.255.0 subnet mask, and a filename of .bin.: rommon 16 > IP_ADDRESS=10.1.1.1 !- This is the temporary IP address assigned to the router. Set the DEFAULT_GATEWAY= variable to the address of the TFTP server. The DEFAULT_GATEWAY= address should not be the same address as the IP_ADDRESS= variable.TFTP_FILE= must be upper case and .bin is case sensitive.The variable itself is case sensitive as in the case of a filename, as shown in the following example: All variable commands must be upper case.

For example, if a Cisco 1700 series router has a WIC-1ENET card installed, the tftpdnld ROMmon command does not work with that card. If the router has two built-in Ethernet or fast Ethernet interfaces, always use the first interface (usually 0/0).

The file being uploaded is compatible with hardware and memory requirements.If possible, connect directly to the PC running the TFTP server with a crossover cable.If using Cisco TFTP Server 1.1, deselect the two check boxes in View > Options for logging and file transfer progress.The filesize of the Cisco IOS image being uploaded is correct.The Cisco IOS file is in the root directory of the TFTP server.If the tftpdnld ROMmon command recovery procedure fails, verify that the following conditions are met: Inputting the commands with incorrect syntax or variables causes the procedure to fail. The tftpdnld ROM Monitor (ROMmon) recovery procedure must be done in a specific way in order to work properly.

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