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