B-20
Catalyst 3750 Metro Switch Software Configuration Guide
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Appendix B Working with the Cisco IOS File System, Configuration Files, and Software Images
Working with Software Images
Image Location on the Switch
The Cisco IOS image is stored as a .bin file in a directory that shows the version number. 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. 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 you might have stored in flash memory.
tar File Format of Images on a Server or Cisco.com
Software images located on a server or downloaded from Cisco.com are provided in a tar file format,
which contains these files:
• An info file, which serves as a table of contents for the tar file
• One or more subdirectories containing other images and files, such as Cisco IOS images
This example shows some of the information contained in the info file. Table B-3 provides additional
details about this information:
version_suffix:i5-121.14-AX
version_directory:c3750me-i5-mz.121.14-AX
image_system_type_id:0x00000001
image_name:c3750me-i5-mz.121.14-AX.bin
ios_image_file_size:4782592
total_image_file_size:4784128
image_feature:LAYER_3|MIN_DRAM_MEG=64
image_family:C3750ME
stacking_number:1.1
board_ids:0x00000004
info_end:
Note Disregard the stacking_number field. It does not apply to the switch.
Table B-3 info File Description
Field Description
version_suffix Specifies the Cisco IOS image version string suffix
version_directory Specifies the directory where the Cisco IOS image is installed
image_name Specifies the name of the Cisco IOS image within the tar file
ios_image_file_size Specifies the Cisco IOS image size in the tar file, which is an approximate measure of how
much flash memory is required to hold just the Cisco IOS image
total_image_file_size Specifies the size of all the images (the Cisco IOS image 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_family Describes the family of products on which the software can be installed
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