Patent 7792123 was granted and assigned to Huawei on September, 2010 by the United States Patent and Trademark Office.
A method for implementing hierarchical Virtual Private LAN Service (VPLS), includes: using Border Gateway Protocol (BGP) in a VPLS network; and implementing hierarchical VPLS in the VPLS network by using the BGP. The invention further provides a system for implementing hierarchical VPLS.