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In a Cisco SD-WAN network, multicast traffic management is handled differently compared to traditional IP multicast methods due to the nature of the overlay architecture.

Multicast Service Routes: In Cisco SD-WAN, multicast receivers use the vSmart controller to request multicast streams. This is done via multicast service routes which the vSmart controller manages. The vSmart controller is responsible for maintaining and distributing multicast routing information to all edge devices in the network.

Process:

When a multicast receiver wants to join a multicast stream, it sends an IGMP join request.

The WAN Edge device forwards this request to the vSmart controller.

The vSmart controller then updates the multicast service routes to include the new receiver, ensuring that multicast traffic is appropriately forwarded to the joining receiver.

Cisco SD-WAN Multicast Configuration Guide

Cisco SD-WAN vSmart Controller Documentation

To allow VPN 10 traffic to have direct internet access locally from the WAN Edge device, the configuration must ensure that the traffic is routed correctly and that NAT (Network Address Translation) is applied to allow the traffic to exit to the internet.

Policy Configuration:

NAT Use: The configuration should include a directive to use NAT for the specific VPN (VPN 10 in this case). This ensures that the traffic originating from VPN 10 can be translated and routed to the internet.

Apply Policy: The policy should be applied in the outbound direction to the appropriate interface that connects to the internet.

Option A Analysis:

This option includes the nat use-vpn 0 directive, which instructs the system to use NAT for traffic in VPN 10, allowing it to access the internet directly.

The apply-policy command is correctly used to apply the policy to the site list and the data-policy DPI from-service.

Cisco SD-WAN NAT Configuration Guide

Cisco SD-WAN Direct Internet Access (DIA) Configuration Documentation