With L2 VPN, you can stretch multiple logical networks (both VLAN and VXLAN) across geographical sites. In addition, you can configure multiple sites on an L2 VPN server. Virtual machines remain on the same subnet when they are moved between sites and their IP addresses do not change. Egress optimization enables Edge to route any packets sent towards the Egress Optimization IP address locally, and bridge everything else.
L2 VPN thus allows enterprises to seamlessly migrate workloads backed by VXLAN or VLAN between physically separated locations. For cloud providers, L2 VPN provides a mechanism to on-board tenants without modifying existing IP addresses for workloads and applications.
If one of the sites is not backed by NSX, a standalone NSX Edge can be deployed on that site.