Cisco Systems 520 series Configuration Register, Using the Tftp Download Command, Retrytimes

Appendix C ROM Monitor

Configuration Register

Number of times the router attempts ARP and TFTP download. The	TFTP_RETRY_COUNT=
default is 7.	retry_times
Length of time, in seconds, before the download process times out. The	TFTP_TIMEOUT= time
default is
2,400 seconds (40 minutes).
Whether or not the router performs a checksum test on the downloaded	TFTP_CHECKSUM=settin
image:	g
1—Checksum test is performed.
0—No checksum test is performed.

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

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: 192.168.254.254

TFTP_FILE: sr520-adipservicessk9-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-Cor Break to stop the transfer before the flash memory is erased.

Configuration Register

The virtual configuration register is in nonvolatile RAM (NVRAM) and has the same functionality as other Cisco routers. You can view or modify the virtual configuration register from either the ROM monitor or the operating system software. Within the ROM monitor, you can change the configuration register by entering the register value in hexadecimal format, or by allowing the ROM monitor to prompt you for the setting of each bit.

Cisco Secure Router 520 Series Software Configuration Guide

OL-14210-01 C-5