MULTICAST PACKET TRANSMISSION

摘要

A method for multicast packet transmission by a first provider edge device in a virtual switching instance, in which the first provider edge device transmits, to a second provider edge device in the virtual switching instance, a packet having an address of a private network multicast group and an address of a public network multicast group associated with the private network multicast group. The first provider edge device receives, from the second provider edge device, a join request packet to join the public network multicast group. The first provider edge device stores forwarding information for the public network multicast group, wherein the forwarding information relates to an interface over which the join request packet is received by the first provider edge device. The first provider edge device encapsulates a multicast packet for the private network multicast group with the address of the public network multicast group. The first provider edge device transmits the encapsulated multicast packet according to the address of the public network multicast group and forwarding information.