A method and device are provided for an improved system and method of labeling data units with a domain field that is fast, scalable and simple to implement in domain switching applications without adding to the protocol overhead. The system and method are also suitable for point-to-multipoint confi...http://www.google.de/patents/US6567406?utm_source=gb-gplus-sharePatent US6567406 - Method of labeling data units with a domain field
