# Network management architecture

## Architecture illustration

The diagrams below illustrate some of the network configurations enabled by the libvirt networking APIs

- VLAN 1. This virtual network has connectivity to `LAN 2` with traffic forwarded and NATed.
- VLAN 2. This virtual network is completely isolated from any physical LAN.
- Guest A. The first network interface is bridged to the physical `LAN 1`. The second interface is connected to a virtual network `VLAN 1`.
- Guest B. The first network interface is connected to a virtual network `VLAN 1`, giving it limited NAT based connectivity to LAN2. It has a second network interface connected to `VLAN 2`. It acts a router allowing limited traffic between the two VLANs, thus giving `Guest C` connectivity to the physical `LAN 2`.
- Guest C. The only network interface is connected to a virtual network `VLAN 2`. It has no direct connectivity to a physical LAN, relying on `Guest B` to route traffic on its behalf.

### Logical diagram

### Physical diagram