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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Upgrading the Cisco IOS Software
How to Upgrade the Cisco IOS Image
15. (Optional) Set the TFTP_DESTINATION=[flash0: | flash1: | usbflash0: | usbflash1:] flash
destination device for file.
16. (Optional) Set the GE_SPEED_MODE= speed configuration.
17. Use the set command to verify that you have set the variables correctly.
18. Use the tftpdnld [-r] command to download the image.
DETAILED STEPS
Step 1 Enter ROM monitor mode.
Step 2 Set the IP address of the router. For example:
rommon > IP_ADDRESS=172.16.23.32
Step 3 Set the IP subnet mask. For example:
rommon > IP_SUBNET_MASK=255.255.255.224
Step 4 Set the default gateway address. For example:
rommon > DEFAULT_GATEWAY=172.16.23.40
Step 5 Set the TFTP server IP address, which is the location from which the software will be downloaded:
rommon > TFTP_SERVER=172.16.23.33
Step 6 Set the name and directory location to which the image file will be downloaded onto the router. For
example:
rommon > TFTP_FILE=archive/rel22/<image name>
Step 7 (Optional) Set the input port to use a Gigabit Ethernet port. Usage is GE_PORT=[0 | 1 | 2]. For example:
rommon > GE_PORT=0
Step 8 (Optional) Set the Ethernet media type. Usage is TFTP_ MEDIA_TYPE=[0 1], where Copper= 0 and
Fiber=1:
rommon > TFTP_MEDIA_TYPE=1
Step 9 (Optional) Decide whether the router will perform a checksum test on the downloaded image. Usage is
TFTP_CHECKSUM=[0 | 1], where 1=checksum test is performed (default) and 0=no checksum test. For
example:
rommon > TFTP_CHECKSUM=0
Step 10 (Optional) Set the number of times that the router will attempt Address Resolution Protocol (ARP) and
TFTP download. The default is 7 attempts. For example:
rommon > TFTP_RETRY_COUNT=10
Step 11 (Optional) Set the amount of time, in seconds, before the download process times out. The default is
2400 seconds (40 minutes). The following example shows 1800 seconds (30 minutes):
TFTP_TIMEOUT=1800
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