What is the purpose of ‘’vpn 0’’ in the configuration template when onboarding a WAN...

It carries control traffic over secure DTLS or TLS connections between vSmart controllers and vEdge routers, and between vSmart and vBond

It carries control out-of-band network management traffic among the Viptela devices in the overlay network.

It carries control traffic over secure IPsec connections between vSmart controllers and vEdge routers, and between vSmart and vManager

It carries control traffic over secure IPsec connections between vSmart controllers and vEdge routers, and between vSmart and vBond