Who advertises the rendezvous point and over which network in the SD-WAN replicator role?
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Correct answer: vSmart Controllers advertise the rendezvous point to all the receivers through the overlay network..
Why this is the answer
In Cisco SD-WAN, vSmart Controllers act as the centralized control plane, responsible for orchestrating the overlay network. When a device needs to send multicast traffic, it registers with a rendezvous point (RP). The vSmart Controllers learn about these RPs and then advertise this information to all potential receivers within the SD-WAN fabric. This advertisement occurs over the secure, logical overlay network established by IPsec tunnels between WAN Edge devices and vSmart Controllers. WAN Edge devices are data plane elements; they forward traffic but don't typically advertise control plane information like RP locations. Advertising over the underlay network would expose control plane details to the underlying infrastructure, which is contrary to the SD-WAN's overlay design principles.
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