chromium/chromeos/components/test/data/onc/vpn_active_settings.onc

{ "Type": "VPN",
  "Name": "testopenvpn",
  "ConnectionState": "Connected",
  "GUID": "123",
  "IPConfigs":[
    {
      "Gateway":"2001:db8:85a3::7a2e:370:7331",
      "IPAddress":"2001:0db8:85a3:0000:0000:8a2e:0370:7334",
      "NameServers":[],
      "RoutingPrefix":12,
      "Type":"IPv6"
    }
  ],
  "SavedIPConfig":{
    "Gateway":"1.1.1.4",
    "IPAddress":"124.124.124.124",
    "NameServers":[
      "1.1.1.5",
      "1.1.1.6"
    ],
    "RoutingPrefix":25,
    "Type":"IPv4"
  }
}