5 hours ago
The Detailed Sequence of Events
- DHCP: The router wakes up and broadcasts for an IP. The DHCP server provides the IP address, Subnet Mask, Default Gateway, and (crucially) the DNS Server IP.
- DNS: Now that the router has a DNS server to talk to, it performs a lookup for the hardcoded Cisco ZTP URL (e.g.,
[code]devicehelper.cisco.com[/code]
).
- ZTP/PnP Server Connection: The router uses that resolved IP to connect to the Cisco Public ZTP/PnP portal. It presents its serial number/certificate. The portal looks up your specific "Provisioning File" and tells the router: "You belong to Company X. Go talk to their vBond at this specific IP/FQDN."
- Connection to vBond: The router finally reaches out to your private vBond Orchestrator. This is the first "real" SD-WAN controller contact. vBond authenticates the device and sends it the list of vManage and vSmart controllers.