Patent ID: 9049138
Filing Date: 2015-06-02
Classification: H04L

Abstract:
1. A method for implementing multicast forwarding in an Extended VLAN Bridge (EVB), comprising: receiving a multicast frame and acquiring a multicast address from the multicast frame; inquiring two or more subgroups corresponding to the multicast address from a first preset mapping table; inquiring an identifier (ID) corresponding to each subgroup, mapping port corresponding to each ID of the corresponding subgroup and a master port of the inquired mapping ports from the first preset mapping table; forwarding, when the ID of the corresponding subgroup is a Multicast Identifier (MCID), the multicast frame carrying the MCID to a corresponding Port Extender (PE) assembly via the master port; and distributing, by the PE assembly, the multicast frame to a User Equipment (UE) according to a correspondence between the MCID carried in the multicast frame and a downlink port of the PE assembly, wherein distributing, by the PE assembly, the multicast frame to a UE according to a correspondence between the MCID carried in the multicast frame and a downlink port of the PE assembly comprises: receiving, by the PE assembly, the multicast frame carrying the MCID via an uplink port; inquiring on a second preset mapping table, duplicating and forwarding the multicast frame through a downlink port which extended level by level according to a correspondence between the MCID carried in the multicast frame and a PE downlink port in the second preset mapping table; stripping the MCID from the multicast frame when the multicast frame is forwarded to an external port between the PE assembly and the UE; and sending the multicast frame stripped of the MCID to the UE via the external port.