Method, apparatus and system for protecting multicast source

Abstract

The invention relates to the communication field, particularly to a method, a device and a system for protection of multicast source. The method comprises the following steps: setting at least two pseudo wires (PW) as a protective group on a provider edge (PE) of a backbone network, wherein each PW in the protective group receives the same multicast data stream, either PW in the protective group functions as the working PW to retransmit the received data and the network group management protocol (IGMP) message, and the at least one other PW in the protective group functions as the backup PW to retransmit the IGMP message; detecting whether the link from the PE to a multicast source is normal; and switching between the host PW and the standby PW when detecting that the working link is in fault, to ensure uninterrupted multicast service of the user. Optionally, the method is implemented by the backup protection of the virtual switch interface (VSI). The multicast source protection method can reduce the number of the network equipment, simplify the network organization and ensure the network organization more flexible.

Description

technical field The present invention relates to the communication field, in particular to a method, device and system for protecting a multicast source. Background technique In order to improve the reliability of the multicast service, the router implements the multicast VLAN1+1 protection function on the basis of the multicast VLAN duplication function. The multicast VLAN 1+1 protection function realizes the 1+1 backup of the multicast data flow through the working VLAN and the protection VLAN. The router selects the working VLAN or the protection VLAN. and Maintenance, operation, management, maintenance, referred to as OAM) fault detection mechanism. Bind the continuous monitoring message CCM (Continuity Check Message) with the two VLANs. If the CCM message is normal, it means that the multicast flow in the VLAN is normal; otherwise, the multicast flow is abnormal. Normally, the multicast data flow of the working VLAN is valid, and the multicast data flow of the protect...

AI Technical Summary

Problems solved by technology

The embodiment of the present invention provides a method for protecting multicast sources, and solves the problem of complex networking methods using multicast source protection in current communication networks

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