Example config for 4 machines on 2 serperate seperate vlans

host1guests.nix

{config, pkgs, ...}:
{
        imports = [
                ../virtualisation/guests.nix
        ];



        virtualisation.guests = {
                red1 = {
                        config = ./test1.nix;
                        networks = {
                                red_lan = {
                                        ipAddress = "10.0.1.100";
                                        prefixLength = 24;
                                };
                        };
                };
                red2 = {
                        config = ./test1.nix;
                        networks = {
                                red_lan = {
                                        ipAddress = "10.0.1.101";
                                        prefixLength = 24;
                                };
                        };
                };
                blue1 = {
                        config = ./test1.nix;
                        networks = {
                                blue_lan = {
                                        ipAddress = "10.0.1.100";
                                };
                        };
                };
                blue2 = {
                        type = "lxc";
                        config = ./test1.nix;
                        networks = {
                                blue_lan = {
                                        ipAddress = "10.0.1.101";
                                };
                        };
                };
        };

        # public-facing interface for communication with the outside world.
        virtualisation.publicInterface = "enp5s0";

        # Configure other machines to GRE tunnel to
        virtualisation.tunnels = [ "192.168.2.2" ];

}