You can automatically install an OS10 image on a Dell ONIE-enabled device. This process is known as zero-touch install. After the device boots to ONIE: Install OS, ONIE auto-discovery follows these steps to locate the installer file and uses the first successful method:
- Use a statically configured path that is passed from the boot loader.
- Search file systems on locally attached devices, such as USB.
- Search the exact URLs from a DHCPv4 server.
- Search the inexact URLs based on the DHCP responses.
- Search IPv6 neighbors.
- Start a TFTP waterfall.
The ONIE automatic discovery process locates the stored software image, downloads and installs it, and reboots the device with the new image. Automatic discovery repeats until a successful software image installation occurs and reboots the switch.
If DHCPv4 server is used, ONIE auto-discovery obtains the hostname, domain name, Management interface IP address, and the IP address of the domain name server (DNS) from the DHCP server and DHCP options. It also searches SCP, FTP, or TFTP servers with the default DNS of the ONIE server. DHCP options are not used to provide the server IP.
If USB storage device is used, ONIE searches only FAT or EXT2 file systems for an OS10 image.