Cisco 2950 - Catalyst Switch User Manual

B-21
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Appendix B 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.
This section includes this information:
• Preparing to Download or Upload an Image File By Using TFTP, page B-21
• Downloading an Image File By Using TFTP, page B-22
• Uploading an Image File By Using TFTP, page B-23
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
Note 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, refer to 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).
ios_image_file_size Specifies the software image size in the tar file, which is an approximate measure of how much
flash space is required to hold just the software image
total_image_file_size Specifies the size of all the images (the software image and the HTML files) in the tar file,
which is an approximate measure of how much flash space is required to hold them
image_feature Describes the core functionality of the image
image_family Describes the family of products on which the software can be installed
image_min_dram Specifies the minimum amount of DRAM needed to run this image
Table B-3 info and info.ver File Description (continued)
Field Description

Cisco 2950 - Catalyst Switch Specifications

General

Brand	Cisco
Model	2950 - Catalyst Switch
Category	Switch
Language	English