Mpls ( multiprotocol lable switching ) is a fusion of ip and atm technology which can supply traffic management and vpn operation . and now the mpls standardization efforts have been primarily focused on topology - based aggregation schemes for unicast traffic 但目前mpls更多的是着眼于拓朴驱动的单播流，对目前日益重要的组播业务流ietf ( internetengineeringtaskforce ，因特网工程任务组)尚未有标准出台。
