I have a Azure connectivity design related question.
We are planning to migrate to Azure with the Network connectivity as shown in the above diagram. But one outstanding question is how do we achieve inter region connectivity. Example Spoke Vnet1 in East want to talk to Vnet1 in West region.
The two options that we are considering are:
Route the traffic between East and West though IPSEC to on-prem DC1 <---> VPLS <---> on-prem DC2 and then back to Azure using IPSEC tunnel
Do a Vnet peering between two transit VNets in East and West and route the traffic via Azure backbone. Is this is a possible option? If we do a peering between transit VNets, can we somehow use that to route traffic between spokes in two different regions?