Method for filtering multicast data, network device and router

Abstract

The invention discloses a method for filtering multicast data, a network device and a router. The method comprises the steps that when needing to transmit the multicast data to the first-hop router, the network device acquires multicast transmitting control information, wherein the network device is positioned in a second-layer network between a multicast source server and the first-hop router; the network device judges whether the multicast data are allowed to be transmitted to the first-hop router according to the multicast transmitting control information, the multicast data are transmitted to the first-hop router if the network device judges that the multicast data are allowed to be transmitted to the first-hop router, and the multicast data are refused to be transmitted to the first-hop router if the network device judges that the multicast data are not allowed to be transmitted to the first-hop router. By means of the method, occupation on band width of the network at the multicast source end is reduced, resource waste of switching equipment in the second-layer network between the multicast source server and the first-hop router is avoided, and processing efficiency of the network at the multicast source end is increased.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for filtering multicast data, network equipment and a router. Background technique [0002] With the development of network technology, there are applications for video transmission based on the Internet Protocol (IP) network in video service transmission and video surveillance. Specifically, an IP network can implement effective delivery of multicast content (such as video content) by running group management protocols and multicast routing protocols. [0003] The corresponding group management protocol runs between the multicast receiver and the upstream end-hop router from the multicast receiver to the multicast source. The receiver can join or leave a multicast group based on the group management protocol; the group management protocol can be used Internet Group Management Protocol (IGMP) for Internet Protocol version 4 (IPv4) networks or a multicast r...

AI Technical Summary

Problems solved by technology

In this way, if there are many multicast sources, the multicast data of a large number of multicast sources may be flooded to the first-hop router at the same time. During such processing, the pressure on the first-hop router to process the flooded multicast data is increased. And it will occupy a large amount of bandwidth of the multicast source network, resulting in a waste of switching equipment resources in the layer 2 network between the multicast source and the first hop, thereby reducing the processing efficiency of the multicast source network

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