Method and device for generating multicast forwarding entry
A technology of multicast forwarding table and multicast source, applied in the field of network communication, can solve the problems of high cost and low efficiency
Active Publication Date: 2021-10-22
HUAWEI TECH CO LTD
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Problems solved by technology
At this time, it is necessary to manually select a suitable standby link, and manually configure multicast forwarding entries for forwarding multicast packets on all nodes included in the standby link. When there are many nodes on the standby link, you need to It takes a lot of time to configure multicast forwarding entries, and the efficiency is low
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[0044] When the traditional technology automatically generates the backup link of the multicast network, firstly, according to the LFA algorithm, a node satisfying the IGP cost condition is selected from the neighbor nodes of the protected node as the backup next-hop node of the protected node. The so-called backup next-hop node refers to the node in the backup link that directly sends the multicast message to the protected node.
[0045] The so-called IGP cost condition can be expressed as: cost(N→D)
[0046] For an example, see figure 1 , which is a schematic diagram of a multicast network topology. In this fig...
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The embodiment of the present application discloses a method and device for generating a multicast forwarding entry, which helps to improve the generation efficiency of a multicast forwarding entry of a backup next-hop node of a protected node. The method for generating a multicast forwarding entry includes: the first node receives a join message from a second node that is not a direct neighbor, and the join message includes a first multicast source address and a first multicast group address; the second A node generates a first multicast forwarding entry, the first multicast forwarding entry includes the first multicast source address, the first multicast group address, and an outgoing interface, and the outgoing interface is a first tunnel A tunnel interface, where the first tunnel is a tunnel for forwarding multicast packets between the first node and the second node.
Description
technical field [0001] The present application relates to the field of network communication, in particular to a method and device for generating a multicast forwarding entry. Background technique [0002] Multicast is a point-to-multipoint information transmission method, that is, a multicast source (source) can send data to multiple receivers (receivers) at the same time, and multiple receivers form a specific node set, called a group or groups. Because multicast technology has the advantages of high network utilization, reduced backbone network congestion, resource saving, and strong scalability, it has played a great role in new network applications such as video conferencing, file distribution, real-time information release, and Internet TV. [0003] At present, the multicast fast reroute (multicast-only fast reroute, MoFRR) technology is usually used to reduce the loss of multicast packets. That is, the multicast source can send the same multicast packet to the same ...
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IPC IPC(8): H04L12/761H04L12/723H04L12/46H04L45/16H04L45/50
CPCH04L45/16H04L45/50H04L12/4633
Inventor 王大为刘京卿
Owner HUAWEI TECH CO LTD