code: def do_rtn(self, args):
          
          args = args.split()
          if _debug: ReadPropertyConsoleCmd._debug("do_rtn %r", args)
  
          # provide the address and a list of network numbers
          router_address = Address(args[0])
          network_list = [int(arg) for arg in args[1:]]
  
          # pass along to the service access point
          this_application.nsap.add_router_references(None, router_address, network_list)
docs: rtn <addr> <net> ...