1015
Working with the Cisco IOS File System, Configuration Files, and Software Images
Working with Software Images
Copying Image Files By Using TFTP
You can download a switch image from a TFTP server or upload the image from the switch to a TFTP server.
You download a switch image file from a server to upgrade the switch software. You can overwrite the current image with
the new one or keep the current image after a download.
You upload a switch image file to a server for backup purposes; this uploaded image can be used for future downloads
to the same or another switch of the same type.
Note: Instead of using the copy privileged EXEC command or the archive tar privileged EXEC command, we recommend
using the archive download-sw and archive upload-sw privileged EXEC commands to download and upload software
image files.
Preparing to Download or Upload an Image File By Using TFTP
Before you begin downloading or uploading an image file by using TFTP, do these tasks:
Ensure that the workstation acting as the TFTP server is properly configured. On a Sun workstation, make sure that
the /etc/inetd.conf file contains this line:
tftp dgram udp wait root /usr/etc/in.tftpd in.tftpd -p -s /tftpboot
Make sure that the /etc/services file contains this line:
tftp 69/udp
You must restart the inetd daemon after modifying the /etc/inetd.conf and /etc/services files. To restart the
daemon, either stop the inetd process and restart it, or enter a fastboot command (on the SunOS 4.x) or a reboot
command (on Solaris 2.x or SunOS 5.x). For more information on the TFTP daemon, see the documentation for
your workstation.
Ensure that the switch has a route to the TFTP server. The switch and the TFTP server must be in the same
subnetwork if you do not have a router to route traffic between subnets. Check connectivity to the TFTP server by
using the ping command.
Ensure that the image to be downloaded is in the correct directory on the TFTP server (usually /tftpboot on a UNIX
workstation).
For download operations, ensure that the permissions on the file are set correctly. The permission on the file should
be world-read.
Before uploading the image file, you might need to create an empty file on the TFTP server. To create an empty file,
enter the touch filename command, where filename is the name of the file you will use when uploading the image
to the server.
During upload operations, if you are overwriting an existing file (including an empty file, if you had to create one) on
the server, ensure that the permissions on the file are set correctly. Permissions on the file should be world-write.
total_image_file_size Specifies the size of all the images (the Cisco IOS image and the web management files) in the
tar file, which is an approximate measure of how much flash memory is required to hold them.
image_feature Describes the core functionality of the image.
image_min_dram Specifies the minimum amount of DRAM needed to run this image.
image_family Describes the family of products on which the software can be installed.
Table 68 info File Description (continued)
Field Description
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