Home > Networking Solutions > Enterprise/Data Center Networking Solutions > Enterprise SONiC Networking Solutions > Guides > Zero Touch Deployment of Open Dell Switches with SONiC > Method 1 - ONIE discovery install (factory default install)
Provided that the following requirements have been set up, powering on a factory default Dell switch starts ONIE OS discovery automatically. Afterward, SONiC ZTP starts automatically.
If you have not met the following requirements, follow the detailed setup steps from the Compatible Dell switches chapter:
When you power on your switch, the ZTP process starts. The following screenshots show a successful ZTP staging with firmware install, basic SONiC config file, and provisioning script that sets the desired hostname.
First, ONIE will install the SONiC 3.5.2 version by discovery and execution method to automatically find the discovery image. When the switch has rebooted with this version, the SONiC ZTP starts and follows the intended SONiC 4.0 version according to the ZTP json file. It loads a default config and performs the hostname task from the final provisioning script.