300-415 Question #361: Real Exam Question with Answer & Explanation

This question tests knowledge of the Zero Touch Provisioning (ZTP) bootstrap sequence for a Cisco SD-WAN WAN Edge router, specifically the ordered steps from power-on to full fabric participation.

WAN Edge Router Deployment

Question

Drag and drop the steps from the left into the sequence on the right for a WAN Edge router after powering on for zero touch provisioning.

Explanation

This question tests knowledge of the Zero Touch Provisioning (ZTP) bootstrap sequence for a Cisco SD-WAN WAN Edge router, specifically the ordered steps from power-on to full fabric participation.

Approach. The correct ZTP sequence after power-on is: (1) WAN Edge boots and sends a DHCP request on transport/management interfaces to obtain an IP address and DNS server. (2) The router performs DNS resolution for the ZTP server (ztp.viptela.com) and contacts it over HTTPS - the ZTP server validates the device serial number and returns the vBond orchestrator address. (3) The WAN Edge establishes a TLS/DTLS connection to vBond, which authenticates the device certificate and provides the addresses of vManage and vSmart controllers. (4) The router connects to vManage via NETCONF to download its full Day-0 configuration, then brings up OMP control-plane sessions with vSmart, and finally negotiates IPsec BFD data-plane tunnels with peer WAN Edge routers.

Concept tested. Cisco SD-WAN Zero Touch Provisioning (ZTP) bootstrap sequence - the ordered control-plane bring-up process: DHCP → ZTP server contact → vBond authentication → vManage config push → vSmart OMP sessions → data-plane IPsec tunnels.

Reference. Cisco SD-WAN (ENSDWI) - 'SD-WAN Onboarding and ZTP' section; Cisco Documentation: 'Zero Touch Provisioning for Cisco SD-WAN Devices'

Topics

#WAN Edge#Zero Touch Provisioning#Router Deployment

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