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Method and device for creating message table entry as well as method and device for forwarding multicast data stream

A message and table entry technology, applied in the field of Ethernet multicast, can solve the problems of wasting bandwidth resources and increasing the processing burden of user switches without on-demand

Active Publication Date: 2011-01-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] From the above two examples, it can be seen that users or switches without VOD will still receive data streams forwarded by other switches, which not only wastes a lot of bandwidth resources, but also increases the bandwidth of users without VOD and / or switches without VOD. processing burden

Method used

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  • Method and device for creating message table entry as well as method and device for forwarding multicast data stream
  • Method and device for creating message table entry as well as method and device for forwarding multicast data stream
  • Method and device for creating message table entry as well as method and device for forwarding multicast data stream

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Embodiment Construction

[0066] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0067] see image 3 , propose an embodiment of the message entry creation method of the present invention, which includes:

[0068] Step S101, judging that the received protocol message is a hello message or a pruning message;

[0069] Step S102, when the protocol message is a hello message, create a corresponding hello message entry;

[0070] Step S103, when the protocol packet is a pruning packet, create a corresponding pruning packet entry.

[0071] Further, in the above embodiment, the hello message entry records include: the device sending the hello message, the real port receiving the hello message, the vlan where the real port receiving the hello message is located, and the hello aging time value.

[0072] The entry record of the clipping message includes: the device sending the clipping message, the real po...

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Abstract

The invention discloses a method and a device for creating a message table entry as well as a method and a device for forwarding a multicast data stream. The method for forwarding the multicast data stream comprises the following steps of: looking up the hello message table entry recording the same vlan, and recording a pruning type and a pruning-grafting message table entry of the vlan; looking up a real port inconsistent with the real port in the pruning-grafting message table entry from the hello message table entry; and forwarding the multicast data stream from the real port in the hello message table entry. In the method for forwarding the multicast data stream, through comparing the created hello message table entry with the pruning-grafting message table entry, looking up the real port requiring for forwarding the multicast data stream from the apparatus and forwarding the multicast data stream from the real port, the condition of forwarding the multicast data stream to a neighbor apparatus without requiring the multicast data stream is effectively inhibited and the transmission resource of network data is saved.

Description

technical field [0001] The present invention relates to the field of Ethernet multicast technology, in particular to a method and device for creating message table items, and a method and device for forwarding multicast data streams. Background technique [0002] Protocol Independent Multicast Dense Mode (PIM-DM, Protocol Independent Multicast Dense Mode) is an intra-domain multicast routing protocol, the protocol only has the shortest path tree (SPT, Shortest Path Tree), which uses the "diffusion-pruning" method Forward multicast data streams. [0003] In the PIM-DM multicast domain, the switch running the PIM-DM protocol will periodically send Hello packets for neighbor discovery and Designated Router (DR, Designated Router) election. [0004] The following combines a basic example to introduce the unique "diffusion-pruning" mechanism of PIM-DM. [0005] Such as figure 1 As shown in the figure, suppose that two Layer 3 switches A and B both enable the PIM-DM function; a...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/18H04L45/74
Inventor 赵艳杰
Owner ZTE CORP