code: public static KNXNetworkLinkIP newRoutingLink(final InetAddress localEP, final InetAddress mcGroup,
  		final KNXMediumSettings settings) throws KNXException
  	{
  		try {
  			return newRoutingLink(NetworkInterface.getByInetAddress(localEP), mcGroup, settings);
  		}
  		catch (final SocketException e) {
  			throw new KNXException("error getting network interface: " + e.getMessage());
  		}
  	}
docs: Creates a new network link using the {@link KNXnetIPRouting} protocol, with the local endpoint specified by an IP
  address.
  
  @param localEP the IP address bound to a local network interface for joining the multicast group
  @param mcGroup address of the multicast group to join, use {@link #DefaultMulticast} for the default KNX IP
  multicast address
  @param settings medium settings defining device and medium specifics needed for communication
  @return the network link in open state
  @throws KNXException on failure establishing link using the KNXnet/IP connection