{
    "address_types": ["ipv4", "ipv6"],
    "ipv4base": "10.0.0.0",
    "ipv4mask": 30,
    "ipv6base": "fd00::",
    "ipv6mask": 64,
    "link_ip_start": {"ipv4": "10.0.0.0", "v4mask": 30, "ipv6": "fd00::", "v6mask": 64},
    "lo_prefix": {"ipv4": "1.0.", "v4mask": 32, "ipv6": "2001:db8:f::", "v6mask": 128},
    "routers": {
        "r1": {
            "links": {
                "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback"},
                "r3": {"ipv4": "auto", "ipv6": "auto"}
            },
            "bgp": {
                "local_as": "100",
                "address_family": {
                    "ipv4": {
                        "unicast": {
                            "redistribute": [
                                {"redist_type": "static"}
                             ],
                            "neighbor": {
                                "r3": {"dest_link": {"r1": {}}}
                            }
                        }
                    },
                    "ipv6": {
                        "unicast": {
                            "redistribute": [
                                {"redist_type": "static"}
                             ],
                            "neighbor": {
                                "r3": {"dest_link": {"r1": {}}}
                            }
                        }
                    }
                }
            },
            "static_routes":[
                {
                "network":"10.1.1.0/32",
                "next_hop":"Null0"
                },
                {
                "network":"10:1::1:0/128",
                "next_hop":"Null0"
                }]
            },
        "r2": {
            "links": {
                "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback"},
                "r3": {"ipv4": "auto", "ipv6": "auto"}
            },
            "bgp": {
                "local_as": "200",
                "address_family": {
                    "ipv4": {
                        "unicast": {
                            "redistribute": [
                                {"redist_type": "static"}
                            ],
                            "neighbor": {
                                "r3": {"dest_link": {"r2": {}}}
                            }
                        }
                    },
                    "ipv6": {
                        "unicast": {
                            "redistribute": [
                                {"redist_type": "static"}
                            ],
                            "neighbor": {
                                "r3": {"dest_link": {"r2": {}}}
                            }
                        }
                    }
                }
            },
            "static_routes":[
                {
                "network":"10.1.2.0/32",
                "next_hop":"Null0"
                },
                {
                "network":"10:1::2:0/128",
                "next_hop":"Null0"
                }]
            },
        "r3": {
            "links": {
                "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback"},
                "r1": {"ipv4": "auto", "ipv6": "auto"},
                "r2": {"ipv4": "auto", "ipv6": "auto"},
                "r4": {"ipv4": "auto", "ipv6": "auto"}
            },
            "bgp": {
                "local_as": "300",
                "address_family": {
                    "ipv4": {
                        "unicast": {
                            "neighbor": {
                                "r1": {"dest_link": {"r3": {}}},
                                "r2": {"dest_link": {"r3": {}}},
                                "r4": {"dest_link": {"r3": {}}}
                            }
                        }
                    },
                    "ipv6": {
                        "unicast": {
                            "neighbor": {
                                "r1": {"dest_link": {"r3": {}}},
                                "r2": {"dest_link": {"r3": {}}},
                                "r4": {"dest_link": {"r3": {}}}
                            }
                        }
                    }
                }
            }
        },
        "r4": {
            "links": {
                "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback"},
                "r3": {"ipv4": "auto", "ipv6": "auto"}
            },
            "bgp": {
                "local_as": "400",
                "address_family": {
                    "ipv4": {
                        "unicast": {
                            "neighbor": {
                                "r3": {"dest_link": {"r4": {}}}
                            }
                        }
                    },
                    "ipv6": {
                        "unicast": {
                            "neighbor": {
                                "r3": {"dest_link": {"r4": {}}}
                            }
                        }
                    }
                }
            }
        }
    }
}