Working with the Software Images • • • • • Information About Software Images You can archive (download and upload) software image files, which contain the system software, the Cisco IOS code, and the embedded Device Manager software. Download clip art nokia java. You can download a switch image file from a TFTP, FTP, or RCP server to upgrade the switch software. If you do not have access to a TFTP server, you can download a software image file directly to your PC or workstation by using a web browser (HTTP) and then by using Device Manager or Cisco Network Assistant to upgrade your switch. For information about upgrading your switch by using a TFTP server or a web browser (HTTP), see the release notes. You can replace the current image with the new one or keep the current image in flash memory after a download. You can use the archive download-sw /allow-feature-upgrade privileged EXEC command to allow installation of an image with a different feature set, for example, upgrading from the universal image to the IP services feature set. You can also use the boot auto-download-sw global configuration command to specify a URL to use to get an image for automatic software upgrades. When you enter this command, the master switch uses this URL in case of a version mismatch. 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 to another of the same type. The protocol that you use depends on which type of server you are using. The FTP and RCP transport methods 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 is connection-oriented. These sections contain this configuration information: Note For a list of software images and the supported upgrade paths, see the release notes. Image Location on the Switch The Cisco IOS image is stored as a.bin file in a directory that shows the version number. A subdirectory contains the files needed for web management. The image is stored on the system board flash memory (flash:). You can use the show version privileged EXEC command to see the software version that is currently running on your switch. Once you have added layer 3 switches in GNS 3, you can perform most of the layer 3 switch-based exercises. To add a layer 3 switch in GNS 3, you need to perform the following steps: First of all, download the Cisco 3640 series IOS image file. In the display, check the line that begins with System image file is. It shows the directory name in flash memory where the image is stored. You can also use the dir filesystem: privileged EXEC command to see the directory names of other software images that you might have stored in flash memory. You can use the archive download-sw /directory privileged EXEC command to specify a directory once followed by a tar file or list of tar files to be downloaded instead of specifying complete paths with each tar file. File Format of Images on a Server or Cisco.com Software images on a server or downloaded from Cisco.com are in a file format, which contains these files: • An info file, which serves as a table of contents for the file • One or more subdirectories containing other images and files, such as Cisco IOS images and web management files T Table 3-1 info File Description Field Description version_suffix Specifies the Cisco IOS image version string suffix.
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