Combinations of Underlay and Overlay Networks
The infrastructure network on which VXLAN tunnels are established is called the underlay network, and the service network carried over VXLAN tunnels are called the overlay network. The following combinations of underlay and overlay networks exist in VXLAN scenarios.
Category |
Description |
Example |
|---|---|---|
IPv4 over IPv4 |
The overlay and underlay networks are both IPv4 networks. |
In Figure 1, Server IP and VTEP IP are both IPv4 addresses. |
IPv6 over IPv4 |
The overlay network is an IPv6 network, and the underlay network is an IPv4 network. |
In Figure 1, Server IP is an IPv6 address, and VTEP IP is an IPv4 address. |
IPv4 over IPv6 |
The overlay network is an IPv4 network, and the underlay network is an IPv6 network. |
In Figure 1, Server IP is an IPv4 address, and VTEP IP is an IPv6 address. |
IPv6 over IPv6 |
The overlay and underlay networks are both IPv6 networks. |
In Figure 1, Server IP and VTEP IP are both IPv6 addresses. |
