For plug‑and‑play (ZTP) on Cisco IOS XE SD‑WAN, which two requirements apply?
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Correct answer: The gateway router for the WAN Edge device must be able to reach ztp.viptela.com., The WAN Edge device must have a valid certificate..
Why this is the answer
For ZTP to function, the WAN Edge device needs to communicate with the ZTP server to download its initial configuration. This server is hosted at ztp.viptela.com, making connectivity to this domain essential. The device also requires a valid certificate for secure authentication and to establish trust with the SD-WAN overlay components (vManage, vSmart, vBond). Without a valid certificate, the device cannot join the SD-WAN fabric. Reaching public DNS servers is generally required for name resolution but not a specific ZTP requirement beyond resolving ztp.viptela.com. Reaching the vSmart controller is a post-ZTP step; ZTP primarily involves vManage and vBond for initial provisioning.
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