Hybrid Clouds and Multi-Cloud

Most effective ways of implementing hybrid- or multi-cloud connectivity use traditional mechanisms like VPNs or direct connectivity between your sites and public cloud provider combined with BGP routing.

Not surprisingly, that approach requries decent design, and thus numerous vendors offer over-the-cloud solutions that claim to be simpler to deploy and use. This section contains an overview of that approach.

You will probably want to focus your work on either AWS or Azure. Please watch the materials describing the public cloud provider you want to use during the course.

This section describes other external connectivity options available in AWS VPC - IPsec VPN connections, router-to-router VLAN connections (Direct Connect), inter-VPC peering, and Transit Gateways.

Azure Virtual Networks could be connected to global Internet, to other virtual networks, or to remote sites using IPsec tunnels (VPNs) or direct connections (ExpressRoute).

This section describes Azure external connectivity options, and the concept of Virtual Network Gateways used to implement VPN and ExpressRoute connections.

Azure Virtual WAN is Microsoft's attempt at building an SD-WAN service; Virtual Hubs are the transit virtual routers within Virtual WAN.

This section describes the basics of Virtual WAN and Virtual Hubs, dives deep into Virtual Hub routing, including multiple route tables and transit routing. It also explores various connectivity scenarios, from simple any-to-any connectivity to hub-and-spoke connectivity including networking appliances and Azure Virtual Firewall.