{
     "ietf-network:networks": {
       "network": [
         {
           "network-types": {
           },
           "network-id": "otn-hc",
           "node": [
             {
               "node-id": "D1",
               "termination-point": [
                 {
                   "tp-id": "1-0-1"
                 },
                 {
                   "tp-id": "1-2-1"
                 },
                 {
                   "tp-id": "1-3-1"
                 }
               ]
             },
             {
               "node-id": "D2",
               "termination-point": [
                 {
                   "tp-id": "2-0-1"
                 },
                 {
                   "tp-id": "2-1-1"
                 },
                 {
                   "tp-id": "2-3-1"
                 }
               ]
             },
             {
               "node-id": "D3",
               "termination-point": [
                 {
                   "tp-id": "3-1-1"
                 },
                 {
                   "tp-id": "3-2-1"
                 }
               ]
             }
           ],
           "ietf-network-topology:link": [
             {
               "link-id": "D1,1-2-1,D2,2-1-1",
               "source": {
                 "source-node": "D1",
                 "source-tp": "1-2-1"
               },
               "destination": {
                 "dest-node": "D2",
                 "dest-tp": "2-1-1"
               }
             },
             {
               "link-id": "D2,2-1-1,D1,1-2-1",
               "source": {
                 "source-node": "D2",
                 "source-tp": "2-1-1"
               },
               "destination": {
                 "dest-node": "D1",
                 "dest-tp": "1-2-1"
               }
             },
             {
               "link-id": "D1,1-3-1,D3,3-1-1",
               "source": {
                 "source-node": "D1",
                 "source-tp": "1-3-1"
               },
               "destination": {
                 "dest-node": "D3",
                 "dest-tp": "3-1-1"
               }
             },
             {
               "link-id": "D3,3-1-1,D1,1-3-1",
               "source": {
                 "source-node": "D3",
                 "source-tp": "3-1-1"
               },
               "destination": {
                 "dest-node": "D1",
                 "dest-tp": "1-3-1"
               }
             },
             {
               "link-id": "D2,2-3-1,D3,3-2-1",
               "source": {
                 "source-node": "D2",
                 "source-tp": "2-3-1"
               },
               "destination": {
                 "dest-node": "D3",
                 "dest-tp": "3-2-1"
               }
             },
             {
               "link-id": "D3,3-2-1,D2,2-3-1",
               "source": {
                 "source-node": "D3",
                 "source-tp": "3-2-1"
               },
               "destination": {
                 "dest-node": "D2",
                 "dest-tp": "2-3-1"
               }
             }
           ]
         }
       ]
     }
   }