300-415 Question 109
Single answerA network engineer is deploying a new Cisco SD-WAN router at a branch site using Zero-Touch Provisioning (ZTP). The engineer configures the device with the correct DNS server and ensures that connectivity is in place for the router to reach the ZTP server. However, the router fails to complete the onboarding process. What could be the issue?
- A
The router is unable to resolve the ZTP server's FQDN due to a DNS misconfiguration.
- B
The router's serial number and chassis ID are not added to the vManage controller.
- C
The bootstrap configuration file on the SD-WAN router is missing the default route.
- D
The WAN interface of the router does not have a valid IP address assigned via DHCP.
Show answer and explanation
Correct answer: B
Explanation
For a successful ZTP process, the router must not only reach the ZTP server but also authenticate itself with the vManage controller using its serial number and chassis ID. If this information is not pre-configured on vManage, the onboarding process cannot complete. This makes Option 2 the correct answer.
- A. Incorrect.
If DNS is misconfigured, the router would fail to resolve the ZTP server. However, in this scenario, DNS is specifically mentioned as correctly configured, so this is not the issue.
- B. Correct.
During ZTP, the router's serial number and chassis ID must be pre-registered on the vManage controller to allow the onboarding process to complete. If this information is missing, the router cannot authenticate and onboard.
- C. Incorrect.
The bootstrap configuration is not involved in ZTP, as ZTP relies on the router dynamically reaching the ZTP server and downloading its configuration. A missing default route would be relevant only in a bootstrap method, not ZTP.
- D. Incorrect.
While a valid IP address is necessary, the scenario specifies that connectivity to the ZTP server is in place, so this is not the issue.