Cisco Systems 2950 Working with Software Images

B-19

Catalyst2950 and Catalyst2955 Switch Software Configuration Guide

78-11380-10

AppendixB Working with the Cisco IOS File System, Configuration Files, and Software Images Working with Software Images

You can clear the configuration information from the startup configuration. If you reboot the swi tch with

no startup configuration, the switch enters the setup program so that you can r econfigure the switch with

all new settings.

To clear the contents of your startup configuration, use the erase nvram: or the erase startup-config

privileged EXEC command.

Caution You cannot restore the startup configuration file after it has been deleted.

To delete a saved configuration from flash memory, use the delete flash:filename privileged EXEC

command. Depending on the setting of the file prompt global configuration command, you might be

prompted for confirmation before you delete a file. By default, the switch promp ts for c onfirmation on

destructive file operations. For more information about the file prompt command, re fer to the Cisco IOS

Command Reference for Release 12.1.

Caution You cannot restore a file after it has been deleted.

Working with Software Images

This section describes how to archive (download and upload) software image files, whi ch con tai n t he

system software, Cisco IOS code, and the web management HTML files.

You download a switch image file from a TFTP, FTP , or RCP server to upgrade the switch software. You

can replace the current image with the new one or keep the current image in flash memory after a

download.

You upload a switch image file to a TFTP, FTP, or RCP server for backup purposes. You can use this

uploaded image for future downloads to the same switch or another of the same type.

The protocol that you use depends on which type of server tha t y ou are usin g. Th e FTP an d RCP

transport mechanisms provide faster performance and more reliable delivery of data than TFTP. These

improvements are possible because FTP and RCP are built on and use the TCP/IP stack, which i s

connection-oriented.

This section includes this information:

•Image Location on the Switch, page B-20

•tar File Format of Images on a Server or Cisco.com, page B-20

•Copying Image Files By Using TFTP, page B-21

•Copying Image Files By Using FTP, page B-24

•Copying Image Files By Using RCP, page B-28