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Catalyst 2948G-L3 and Catalyst 4908G-L3 Switch Router Software Feature and Configuration Guide
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Chapter 3 Configurations for the Layer 3 Switch Router
Updating the System Image
Updating the System Image
This section provides brief instructions for updating the system image on your Layer 3 switch router.
This procedure assumes that you are manually booting the Layer 3 switch router from a system image
on the bootflash memory SIMM. You can also configure the Layer 3 switch router to boot automatically
from a system image specified in the BOOT environment variable. For additional information on booting
options and maintaining system images, refer to the Cisco IOS Configuration Fundamentals
Configuration Guide.
To update the system software, do the following:
Step 1 Download the system image from Cisco.com.
Step 2 Copy the system image to the Layer 3 switch router.
Step 3 Reload the Layer 3 switch router with the new image.
Downloading System Images from Cisco.com
Cisco IOS system images, along with other software, are available from the Software Center on
Cisco.com at http://www.Cisco.com. You can download system images from Cisco.com using your
browser’s FTP capability, using conventional FTP, or using Cisco.com’s asynchronous dial-up interface.
For instructions on accessing and downloading software from Cisco.com, refer to the Software
Downloading from Cisco.com via World Wide Web publication at the Software Center on Cisco.com.
Copying the System Image to the Layer 3 Switch Router
You can copy the system image to the Layer 3 switch router using TFTP, FTP, or rcp. If the system you
used to download the image from Cisco.com does not function as a TFTP, FTP, or rcp server, you must
first copy the file to an intermediate server that provides those services to your Layer 3 switch router.
Note Before copying the system image from the server to the Layer 3 switch router, check the size of the
file to make sure you will have enough room for your Layer 3 switch router’s bootflash memory.
If the bootflash memory is full, you must erase all the files in the bootflash memory file system before
copying a new image file from the TFTP server. In addition, before you copy a new image from the TFTP
server, you must first download a copy of your known good image. If the new image file you copy from
the TFTP server is corrupted, you can revert to the known good image.