Dell S4048-ON EMC Networking ONIE Quick Start Guide - Page 8

4 ONIE: Install OS There are multiple ways in which an Operating System can be installed using ONIE. The default setting is to have ONIE auto-discovery enabled. With ONIE auto-discovery enabled an automatic (zero-touch) install from a USB flash drive or HTTP/TFTP server can be performed. Another option is to stop the discovery process and install the Operating System manually. For each of the remote installations to work properly, an IP address is needed on the switch. The default is DHCP. If a DHCP server is not available, then an IP address must be manually assigned, see Appendix A for this process. Note: Once the ONIE: Install OS option has been selected, an operating system installation may be necessary regardless of any existing network operating systems that have been installed. 4.1 Automatic (zero-touch) install Automatic (zero-touch) installs of an operating system image are supported on Dell EMC ONIE-enabled devices. After a device successfully enters the ONIE: Install OS menu, auto-discovery obtains the hostname, domain name, management interface IP address, and the IP address of one or more DNS name servers on your network from the DHCP server and DHCP options. The ONIE auto-discovery process locates the stored software image and then starts the installation. Once completed, ONIE then reboots the device with the new operating system image. If a USB drive was previously inserted, auto-discovery searches the USB storage supporting the FAT32 or EXT2 file system. It also searches for HTTP or TFTP servers if a USB installer file is not found. The auto discovery method repeats until a successful software image installation occurs and reboots the switch. 4.1.1 HTTP/TFTP For sites that require multiple operating system installs, the use of a less specific file name and file path ensures that all the switches in the network install the same OS. Use of file path that includes the device MAC address and the full onie-installer name, ensures that only a specific device receives the intended operating system. Note: For a listing of qualified file names used by ONIE auto-discovery, see Appendix C. The process that ONIE uses for auto discovery will go through the following sequence until it finds a valid installer file: 1. Local USB DRIVE with file. 2. http://onie-server/. 3. http:///. a) IPv4 addresses are determined by pinging the IPv4 broadcast address, 255.255.255.255. 4. http:///. b) IPv6 addresses are determined by an IPv6 ping to "all nodes" link local multicast address, ff02::1. 5. tftp://onie-server//onie-installer-x86_64-dellemc_s4100_c2338-r0 This repeats until manually stopped or an onie-installer file is found. Note: For information on the auto discovery process, see the Open Computer Project. The content within this document is specific to Dell EMC Networking as where the Open Computer Project documentation is more generic. 8 Dell EMC Networking ONIE Quick Start Guide