You can bridge local network segments between HCX-enabled data centers with HCX Network Extension.
With VMware HCX Network Extension (HCX-NE), a High-Performance (4–6 Gbps) service, you can extend the Virtual Machine networks to a VMware HCX-enabled remote site. Virtual Machines that are migrated or created on the extended segment at the remote site are Layer 2 next to virtual machines placed on the origin network. Using Network Extension a remote site's resources can be quickly consumed. With Network Extension , the default gateway for the extended network only exists at the source site. Traffic from virtual machines (on remote extended networks) that must be routed returns to the source site gateway.
Using VMware HCX Network Extension with VMware HCX Migration you can:
Retain the IP and MAC addresses of the Virtual Machine and honor the existing network policies.
Extend VLAN networks from a VMware vSphere Distributed Switch.
Extend NSX overlay networks.
VMware HCX deploys the Remote Site HCX-NE appliance automatically whenever a local appliance is deployed. The HCX-NE service appliance is always deployed as a pair.