Network traffic management is achieved based on automatically setting up a plurality of virtual networks (VNETs) within a single large virtual LAN. Multicast/broadcast traffic is confined to the VNET of the source, without imposing constraints on layer two addressing within the virtual LAN. VNETs are...http://www.google.com.au/patents/US5752003?utm_source=gb-gplus-sharePatent US5752003 - Architecture for managing traffic in a virtual LAN environment
