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C-5
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Appendix C ROM Monitor
Disaster Recovery with TFTP Download
Using the TFTP Download Command
Perform these steps in ROM monitor mode to download a file through TFTP.
Step 1 Use the appropriate commands to enter all the required variables and any optional variables described in
preceding sections.
Step 2 Enter the tftpdnld command as follows:
rommon 1 > tftpdnld -r
Note The -r variable is optional. Entering this variable downloads and boots the new software but does
not save the software to flash memory. You can then use the image that is in flash memory the
next time you enter the reload command.
You will see output similar to the following:
IP_ADDRESS: 10.3.6.7
IP_SUBNET_MASK: 255.255.0.0
DEFAULT_GATEWAY: 10.3.0.1
TFTP_SERVER: 223.255.254.254
TFTP_FILE: c1800-advsecurityk9-mz
Do you wish to continue? y/n: [n]:
Step 3 If you are sure that you want to continue, enter y in response to the question in the output:
Do you wish to continue? y/n: [n]:y
The router begins to download the new file.
If you mistakenly entered yes, you can enter Ctrl-C or Break to stop the transfer before the flash
memory is erased.
Number of times the router attempts ARP and
TFTP download. The default is 7.
TFTP_RETRY_COUNT=
retry_times
Length of time, in seconds, before the download
process times out. The default is
2,400 seconds (40 minutes).
TFTP_TIMEOUT= time
Whether or not the router performs a checksum
test on the downloaded image:
1—Checksum test is performed.
0—No checksum test is performed.
TFTP_CHECKSUM=setting