Networking design for substrate in the overlay

A non-transitory computer readable medium storing specific computer-executable instructions that, when executed by a processor, cause a computer system to perform operations comprising:

• providing a cloud service accessible via a virtual IP address in a virtual cloud network (VCN), wherein the VCN is part of an overlay network;
• receiving, at a source network virtualization device (NVD), a first packet destined to the virtual IP address;
• determining, at the source NVD and based upon a dynamic routing gateway table, the VCN mapped to the virtual IP address;
• identifying, at the source NVD and based upon the virtual IP address, a substrate IP address of a destination NVD that implements a virtual network interface card (VNIC) associated with the virtual IP address;
• and
• communicating the first packet from the source NVD to the destination NVD using the substrate IP address.

A source network virtualization device (NVD) comprising:

• a processor;
• and
• a memory including instructions that, when executed with the processor, cause the source NVD to, at least:
• for a cloud service that is provided and accessible via a virtual IP address in a virtual cloud network (VCN), wherein the VCN is part of an overlay network,
• receive, at the source NVD, a first packet destined to the virtual IP address;
• determine, at the source NVD and based upon a dynamic routing gateway table, the VCN mapped to the virtual IP address;
• identify, at the source NVD and based upon the virtual IP address, a substrate IP address of a destination NVD that implements a virtual network interface card (VNIC) associated with the virtual IP address;
• communicate the first packet from the source NVD to the destination NVD using the substrate IP address.