Multicast recovering method, multicast recovering device and trunk device comprising multicast recovering device

Abstract

The invention relates to a multicast recovering method, a multicast recovering device and a trunk device comprising the multicast recovering device. The method is applicable to a looped network comprising a plurality of trunk devices, wherein each trunk device transmits multicast data based on a multicast forwarding table. The method comprises the steps that under the circumstance that the network topology of the looping network changes, all trunk ports in the trunk devices are added to the multicast forwarding tables of the trunk devices by the trunk devices in the looped network, wherein each trunk port in each trunk device is a port used for being connected with other trunk devices in the looped network; the trunk devices transmit the multicast data according to the multicast forwarding tables; the trunk devices rebuild the network topology based on a predetermined agreement; and the trunk devices update the multicast forwarding tables based on the rebuilt network topology and accomplish multicast recovering.

Description

Technical field [0001] The present invention relates to a multicast recovery method and device and a relay device including the multicast recovery device, and in particular, to a multicast recovery method and device applied to a ring network and a relay including the multicast recovery device equipment. Background technique [0002] In the ring network using the multicast mechanism, each relay device collects group membership based on multicast protocols (IGMP-Snooping, IGMP-Proxy, etc.), establishes a multicast forwarding table, and sends it to each designated host according to the multicast forwarding table ( Or called user equipment) to send multicast data. [0003] In a ring network, due to link failure, manual switching, etc., the network topology may change (for example, the originally blocked port is enabled, etc.), and the multicast data cannot be correctly sent to the specified host. In order to achieve the convergence of multicast traffic as soon as possible when the ne...

AI Technical Summary

Problems solved by technology

[0006] However, the existing technology has the following problems: On the one hand, during the period from the start of broadcasting in the ring network to the convergence of the ring network, multicast data is broadcast in the ring network (also known as multicast traffic flooding), occupying The bandwidth of the ring network affects the speed of ring convergence; on the other hand, multicast data is broadcast to hosts that are not members of the group, which will affect the performance of the host (for example, causing blurred screens on the video host, etc.)

Images