| 摘要 |
A multicast-supported virtual local area network switching system and a method thereof comprise a switching engine ( 10 ), a CPU unit ( 20 ), further comprising a mapping storage unit ( 30 ) for storing the mapping relationship of the virtual local area network and the multicast stream pushed to the switching system by it, and a switching table storage unit ( 40 ) for storing the corresponding relation between ingress virtual local area network and egress virtual local area network; the switching engine ( 10 ) receives the internet group management protocol message from the user virtual local area network and transmits the message to the CPU unit ( 20 ) for processing, if it is Internet group management protocol join/leave message, the CPU unit ( 20 ) looks up the mapping storage unit ( 30 ) and forwards it in the looked-up multicast virtual local area network; the switching engine ( 10 ) receives the Internet group management protocol messages or multicast data frames from the multicast virtual local area network and forwards them in the looked-up user virtual local area network by looking up the switching table storage unit ( 40 ).
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