Method and network equipment for forwarding multicast streaming

Abstract

The invention provides a method and network equipment for forwarding multicast streaming. The method comprises the following steps that: an upstream multicast streaming inflow virtual local area network (VLAN) and a downstream multicast streaming receiving VLAN of the network equipment are configured; when the network equipment receives a multicast joining request message, sent by a user of the downstream multicast streaming VLAN, from a port of the downstream multicast streaming receiving VLAN, the network equipment builds a multicast forwarding table entry according to the multicast joining request message and the port, wherein the multicast joining request message carries a VLAN identification which is used for identifying the VLAN of the user and a multicast group identification which is requested by the user, and the multicast forwarding table entry comprises the VLAN identification of the user, the port and the multicast group identification; and the network equipment receives the multicast streaming which is sent by a multicast streaming inflow VLAN and is corresponding to the multicast group identification, and the network equipment forwards the multicast streaming to the VLAN of the user according to the multicast forwarding table entry. The method and network equipment provided by the invention can realize accurate forwarding of the multicast streaming.

Description

technical field [0001] The invention relates to network communication technology, in particular to a multicast stream forwarding method and network equipment. Background technique [0002] Super Virtual Local Area Network (Super Virtual Local Area Network, Super VLAN) is a way of VLAN division and a management technology specially optimized for IP addresses. The principle is to assign the IP of a network segment to different sub-VLANs (Sub VLANs). Each Sub-VLAN is an independent broadcast domain, and different Sub-VLANs are isolated from each other on the second layer. When users in the Sub VLAN need to communicate at Layer 3, the IP address of the virtual interface of the Super VLAN is used as the gateway address, so that multiple VLANs share one IP address, thereby saving IP address resources. Super VLAN is widely used because of its beneficial effect. [0003] When multicast stream forwarding is performed on the Super VLAN, when the physical interface on the Sub VLAN re...

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Problems solved by technology

[0004] When performing multicast stream forwarding in the Super VLAN according to the above method, since the member interfaces in the Sub VLAN are simply converted into member interfaces of the Super VLAN, the information recorded in the multicast forwarding entry is only the Super VLAN port information, that is, The entire multicast forwarding table entry is still hung on the Super VLAN, so when a physical interface of the Super VLAN belongs to multiple Sub VLANs at the same time, it is impossible to know the specific delivery of the multicast stream to the physical interface when delivering the multicast stream. Which Sub VLAN under the interface

[0005] In a network architecture composed of multiple ordinary VLANs, the above problems may also exist, that is, when multiple VLANs share a port, it will not be possible to distinguish the specific VLAN that requests the multicast stream when forwarding the multicast stream. The multicast stream will be forwarded to all VLANs connected through the physical interface, and precise forwarding of the multicast stream cannot be achieved

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