Method for realizing cross-virtual private local area network multicast

Abstract

The invention discloses a method for realizing cross-VPN multicast, which comprises that: PE on a multicast source and PE on a customer are all provided with a virtual switch instance (VSI) of a VPN where the multicast source is positioned, and pseudo wire (PW) connection is established in the VSI; a multicast router sends an internet group management protocol (IGMP) general query message in the VPN where the multicast source is positioned, and uplink router port information of the VPN where the multicast source is positioned is respectively formed in the PE on the multicast source and the PEon the customer; the PE on the customer and the PE on the multicast source maintain a local multicast member relation table respectively according to sensed multicast information carried in an IGMP protocol message initiated by a user in a VPN where a non-multicast source is positioned; and when receiving multicast data streams, the PE on the multicast source and the PE on the customer retrieve the locally stored multicast member relation table respectively according to the VPN ID where the multicast source is positioned and a multicast MAC address, and then forward the multicast data streamsthrough downlink outgoing interfaces of retrieved entries.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for realizing cross-virtual private local area network multicast. Background technique [0002] VPLS (Virtual Private LAN Service, Virtual Private LAN Service) is a point-to-multipoint L2VPN (L2 Virtual Private Networks, Layer 2 Virtual Private network technology. Its core idea is to use the signaling protocol to establish and maintain PW (Pseudo Wire, pseudowire) between PE (Provider Edge, operator edge router) nodes in the VPLS instance, and transmit the protocol or data packets on the PW , switching, so that multiple LANs in the wide area are integrated into one network at the data link level, and virtual Ethernet services are provided to users. [0003] At present, more and more operators use VPLS technology to provide VPN services for enterprise users. Data isolation between departments can be achieved by dividing different departments into differen...

AI Technical Summary

Problems solved by technology

[0011] Although the above technologies can realize multicast services in the VPLS network, all users and multicast sources are required to be in the same virtual private local area network, which brings great restrictions to the large-scale deployment and wide application of VPLS technology.

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