{
   "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"},
            "r2":{"ipv4":"auto", "ipv6":"auto"},
            "r3":{"ipv4":"auto", "ipv6":"auto"}
         },
         "bgp":{
            "local_as":"100",
            "address_family": {
               "ipv4": {
                  "unicast": {
                     "neighbor": {
                        "r2": {
                           "dest_link": {
                              "r1": {}
                           }
                        },
                        "r3": {
                           "dest_link": {
                              "r1": {}
                           }
                        }
                     }
                  }
               },
               "ipv6": {
                  "unicast": {
                     "neighbor": {
                        "r2": {
                           "dest_link": {
                              "r1": {}
                           }
                        },
                        "r3": {
                           "dest_link": {
                              "r1": {}
                           }
                        }
                     }
                  }
               }
            }
         }
      },
      "r2":{
         "links":{
            "lo": {"ipv4": "auto", "ipv6": "auto", "type": "loopback"},
            "r1":{"ipv4":"auto", "ipv6":"auto"},
            "r3":{"ipv4":"auto", "ipv6":"auto"}
         },
         "bgp":{
            "local_as":"100",
            "address_family": {
               "ipv4": {
                  "unicast": {
                     "neighbor": {
                        "r1": {
                           "dest_link": {
                              "r2": {}
                           }
                        },
                        "r3": {
                           "dest_link": {
                              "r2": {}
                           }
                        }
                     }
                  }
               },
               "ipv6": {
                  "unicast": {
                     "neighbor": {
                        "r1": {
                           "dest_link": {
                              "r2": {}
                           }
                        },
                        "r3": {
                           "dest_link": {
                              "r2": {}
                           }
                        }
                     }
                  }
               }
            }
         }
      },
      "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":"100",
            "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":"200",
            "address_family": {
               "ipv4": {
                  "unicast": {
                     "neighbor": {
                        "r3": {
                           "dest_link": {
                              "r4": {}
                           }
                        }
                     }
                  }
               },
               "ipv6": {
                  "unicast": {
                     "neighbor": {
                        "r3": {
                           "dest_link": {
                              "r4": {}
                           }
                        }
                     }
                  }
               }
            }
         }
      }
   }
}