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@PankajSharma-0832 Thankyou for reaching out to Microsoft Q&A. I understand that you are having questions regarding BGP peering between NVA and vHub as shown in the "Direct Interconnect model with NVA-in-VWAN-hub" architecture.

Please note that the routing capabilities in a virtual hub are provided by a router that manages all routing between gateways using Border Gateway Protocol (BGP). A virtual hub can contain multiple gateways such as a Site-to-site VPN gateway, ExpressRoute gateway, Point-to-site gateway, Azure Firewall. As per your second question, yes, BGP peering with a virtual hub feature is still in gated public preview.

If you are interested in trying this feature, please email previewbgpwithvhub@microsoft.com along with the Resource ID of your Virtual WAN resource. After receiving confirmation of feature enablement, please follow the following doucmentation page for key considerations and a detailed configuration guide.

To locate the Resource ID, open the Azure portal, navigate to your Virtual WAN resource, and click Settings > Properties > Resource ID.
Example: /subscriptions/<subscriptionID>/resourceGroups/<resourceGroupName>/providers/Microsoft.Network/virtualWans/<virtualWANname>

Hope this helps. Please let us know if you have any further questions and we will be glad to assist you further. Thank you!

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