Updating the SD card image
You may need to update the SD card image if the server IP address changes or if a new Kernel is released. It is usually a good idea to update your SD cards with the new boot files every few months.
Wait 20-30 seconds for the SD card files to be downloaded from the web. If you aren't connected to the web a local backup copy will be used. Unless you are using 2 network cards (you will know if you are), then select yes when asked about the IP address.