This is a small-scale Proxmox cluster with three nodes and two subnets within the virtual environment. Each Proxmox node has two NICs, and both the bridges vmbr0 and vmbr1 are attached to eth0 and eth1, respectively. Each bridge has three virtual machines attached to it. Outside the virtual environment, there is a physical switch, which connects Proxmox nodes, and an admin console for all management work. This is Proxmox in its simplest form in a production environment. This type of network can be used as a learning platform or in a very small business environment with less demanding workload. Internet connectivity is provided to the second subnet directly from the firewall with a second NIC, as shown in the following diagram: