Which IP must a WAN Edge reach for ZTP provisioning to succeed?
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Correct answer: 4.4.4.4.
Why this is the answer
For Zero Touch Provisioning (ZTP) to succeed, a Cisco SD-WAN WAN Edge device must be able to reach the ZTP server at the IP address 4.4.4.4. This is a hardcoded IP address within the WAN Edge device's factory-default configuration, specifically for the ZTP process. The device uses this address to initiate communication with the ZTP server to obtain its initial configuration and join the SD-WAN fabric. The other IP addresses listed are incorrect: 8.8.8.8 is Google's public DNS server, 172.16.1.1 is a private IP address often used for internal networks, and 10.1.1.1 is also a private IP address. None of these are the designated ZTP server IP for Cisco SD-WAN.
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