Method, network device and system for multicast service protection
A technology of multicast services and network equipment, applied in the field of network communication, can solve the problems of complex implementation, low bandwidth utilization, large protection and recovery delay, etc., to save network bandwidth, improve bandwidth utilization, and quickly protect multicast services. Effect
Active Publication Date: 2015-12-16
HUAWEI TECH CO LTD
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[0006] The embodiment of the present invention provides a multicast service protection method, network equipment and system to solve the problems of low bandwidth utilization or complex implementation and long protection recovery delay in the multicast service protection scheme in the prior art
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[0031] Establish two multicast trees for multicast services, the first multicast tree and the second multicast tree, the multicast source is dual-homing connected to the root node of the first multicast tree and the root node of the second multicast tree, and the multicast The user is dual-homing connected to the leaf node of the first multicast tree and the leaf node of the second multicast tree. Usually, the first multicast tree is in the normal working state, that is, when no failure occurs, the multicast data packet is only forwarded through the first multicast tree, and the multicast user obtains the multicast data packet from the first multicast tree; if the second group When the root node of the broadcast tree receives the multicast data packet sent by the multicast source, it does not forward it downwards but discards it.
[0032] For the convenience of description, the first multicast tree is referred to as the working tree below, the root node of the first multicast ...
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The embodiment of the invention discloses a multicast service protection method, a network device and a system. The method comprises the following steps that: a protection root receives a failure notification message which comprises a tree identifier of a working tree; the protection root obtains the tree identifier of a protection tree according to the tree identifier of the working tree so as to determine the protection tree corresponding to the working tree; the protection root receives multicast data packets from a multicast source; and when a working root forwards the multicast data packets, the protection root forwards the multicast data packets through the protection tree according to the failure notification message. According to the technical scheme provided by the embodiment of the invention, the working tree and the protection tree are deployed for multicast service which is only transmitted on the working tree in general, so that the network bandwidth is saved, and the bandwidth utilization rate is improved; when the working tree has faults, the working tree and a multicast tree simultaneously forward the data packets of the multicast service, and thus simple and rapid multicast service protection is realized; and the problem of low bandwidth utilization rate or complex implementation and long delay in protection recovery of the multicast service protection scheme in the existing technology is solved.
Description
technical field [0001] The invention relates to the field of network communication, in particular to a multicast service protection method, network equipment and system. Background technique [0002] Multicast technology effectively solves the problem of single-point transmission and multi-point reception, and realizes efficient data transmission from point to multipoint in the network, which can greatly save network bandwidth and reduce network load. Therefore, it is widely used in services such as Internet Protocol Television (IPTV for short), video conferencing, and the like. [0003] Multicast technology establishes and maintains multicast routing by running multicast routing protocols between network devices, such as Multi-Protocol Label Switching (MPLS) Point-to-Multi-Point (P2MP) protocol, and Correctly and efficiently forward multicast packets. However, with the increasing application of multicast technology, the requirements for multicast technology are getting hi...
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IPC IPC(8): H04L12/18H04L12/24
Inventor 江元龙
Owner HUAWEI TECH CO LTD