B-9
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
Appendix B Working with the Cisco IOS File System, Configuration Files, and Software Images
Working with Configuration Files
configuration file is a mixture of the existing configuration file and the copied configuration file, with
the copied configuration file having precedence.
To restore a configuration file to an exact copy of a file stored on a server, copy the configuration file
directly to the startup configuration (by using the copy {ftp: | rcp: | tftp:} nvram:startup-config
privileged EXEC command), and reload the switch.
Configuration File Types and Location
Startup configuration files are used during system startup to configure the software. Running
configuration files contain the current configuration of the software. The two configuration files can be
different. For example, you might want to change the configuration for a short time period rather than
permanently. In this case, you would change the running configuration but not save the configuration by
using the copy running-config startup-config privileged EXEC command.
The running configuration is saved in DRAM; the startup configuration is stored in the NVRAM section
of flash memory.
Creating a Configuration File By Using a Text Editor
When creating a configuration file, you must list commands logically so that the system can respond
appropriately. This is one method of creating a configuration file:
Step 1 Copy an existing configuration from a switch to a server.
For more information, see the “Downloading the Configuration File By Using TFTP” section on
page B-10, the “Downloading a Configuration File By Using FTP” section on page B-12, or the
“Downloading a Configuration File By Using RCP” section on page B-16.
Step 2 Open the configuration file in a text editor, such as vi or emacs on UNIX or Notepad on a PC.
Step 3 Extract the portion of the configuration file with the desired commands, and save it in a new file.
Step 4 Copy the configuration file to the appropriate server location. For example, copy the file to the TFTP
directory on the workstation (usually /tftpboot on a UNIX workstation).
Step 5 Make sure the permissions on the file are set to world-read.
Copying Configuration Files By Using TFTP
You can configure the switch by using configuration files you create, download from another switch, or
download from a TFTP server. You can copy (upload) configuration files to a TFTP server for storage.
This section includes this information:
• Preparing to Download or Upload a Configuration File By Using TFTP, page B-10
• Downloading the Configuration File By Using TFTP, page B-10
• Uploading the Configuration File By Using TFTP, page B-11