A VLAN tagging unit associated with a WAN is used to add VLAN tags based upon logical interfaces. In one example, data received across the logical interface is tagged with an associated VLAN ID by the unit. In another embodiment, flow-based VLAN tagging is done in which in addition to the logical interface...http://www.google.es/patents/US7088714?utm_source=gb-gplus-sharePatente US7088714 - System and method for connecting geographically distributed virtual local area networks
System and method for connecting geographically distributed virtual local ...
