Cross-regional virtual network peering

A computer-implemented method for peering virtual networks managed by a cloud provider, the method comprising:

• determining unique regional identifiers for first and second virtual networks located in two different geographical regions based on regional information pushed down a network management stack of the cloud provider from a regional layer to a host layer;
• and
• generating an encapsulated packet for transmission from a first virtual machine (VM) in the first virtual network located in a first region of the geographical regions to a second VM in the second virtual network located in a second region of the geographical regions,
• wherein the encapsulated packet includes a header comprising the regional identifiers, virtual network addresses of the first and second VMs, and provider network addresses of the first and second VMs.

One or more non-transitory computer-readable media devices having computer-executable instructions embodied thereon, wherein the instructions are executed by at least one processor to peer virtual networks of a tenant of a cloud provider provided in different geographical regions of the cloud provider's network, and the computer-executable instructions are executable by at least one processor to:

• determine regional information of the virtual networks;
• determine unique regional identifiers for the virtual networks based on the regional information;
• subscribe to mappings of addresses in a customer address space of the tenant to a provider address space of the cloud provider;
• and
• generate an encapsulated packet for transmission from a first virtual machine (VM) in a first one of the virtual networks located in a first region of the geographical regions to a second VM in a second one of the virtual networks located in a second region of the geographical regions based on the unique regional identifiers and the subscribed mappings.