code: def AddForwardedIp(self, address, interface):
      
      address = address if IP_ALIAS_REGEX.match(address) else '%s/32' % address
      args = ['add', 'to', 'local', address]
      options = self._CreateRouteOptions(dev=interface)
      self._RunIpRoute(args=args, options=options)
docs: Configure a new IP address on the network interface.
  
      Args:
        address: string, the IP address to configure.
        interface: string, the output device to use.