Topology 
  IPClassA 
  subnet_address
    Topology 
    IPClassA 
    Device = 1
    log_ratio
      Topology 
      IPClassA 
      Device = 1 
      Port = 1 
      poll_interval

  Topology 
  IPClassC 
  security_string
    Topology 
    IPClassC 
    Device = 2 
    Port = 2 
    poll_interval