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1. (WO2018099393) METHOD OF FORWARDING MULTICAST DATA PACKET

Pub. No.:    WO/2018/099393    International Application No.:    PCT/CN2017/113553
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Thu Nov 30 00:59:59 CET 2017
IPC: H04L 12/761
Applicants: NEW H3C TECHNOLOGIES CO., LTD.
新华三技术有限公司
Inventors: ZHOU, Mengtao
周孟韬
QI, Zhenglin
祁正林
XIU, Yihong
修亦宏
LIU, Daogui
刘刀桂
ZHU, Yuchao
朱育超
SONG, Gao
宋高
Title: METHOD OF FORWARDING MULTICAST DATA PACKET
Abstract:
The disclosure provides a method, device, and system for forwarding multicast data packet. The system comprises an extended bridge comprising a controlling bridge and port extender. The controlling bridge transmits via a cascade port a multicast data packet including an ETAG of a multicast ECID. The ETAG of the ECID points to an output port at the port extender connected to the cascade port and belonging to a different VLAN in a same multicast group. The port extender receives, via an uplink port connected to the controlling bridge, the multicast data packet including the ETAG, looks up, duplicated multicast information matching the multicast ECID, and duplicates, according to the duplicated multicast data, and for all output ports, the multicast data packet. The port extender further removes the ETAG from the multicast data packets, adds, to the multicast data packets, a port identifier and a VLAN identifier of each of the output ports, and transmits, via each of the output ports, the multicast data packets including the respective VLAN identifiers.