Research and realization of multicast VLAN and cross VLAN multicast in a distributed IP DSLAM

A dedicated multicast VLAN is adopted to eliminate the extra multicast replication in a video server. The technique of multicast VLAN and cross-VLAN multicast in IP-based access network is discussed along with the application network. The detailed design and implementation of multicast VLAN in an IP DSLAM with a distributed architecture is given as well as an application example.