Cisco Nexus devices support an automatic provisioning or zero-touch deployment feature called PowerOn Auto Provisioning (POAP). This feature assists in automating the initial deployment and configuration of Nexus switches. POAP is enabled by default and activates on devices that have no startup configuration or when Perpetual POAP has been configured using the boot poap enablecommand.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190306-info-poap