Method and apparatus for forwarding multicast message

A technology of multicast message and forwarding method, which is applied in the branch office to provide special service devices, data exchange details, digital transmission system, etc., and can solve the problems of being unable to watch multicast programs and not supporting the PIM protocol, etc.

Inactive Publication Date: 2008-08-27
NEW H3C TECH CO LTD
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Problems solved by technology

[0003] And with figure 2 Take the network shown as an example, assuming that the PIM protocol is enabled on the network between SWITCH1 and SWITCH2, and Layer 3 multicast forwarding can be performed; however, the network between SWITCH1 and SWITCH3 does not support the PIM protocol or does not want to enable Layer 3 group broadcast protocol, it will cause the user terminals accessing the network through SWITCH3 to be unable to watch multicast programs

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  • Method and apparatus for forwarding multicast message
  • Method and apparatus for forwarding multicast message
  • Method and apparatus for forwarding multicast message

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Embodiment Construction

[0035] The core idea of ​​the present invention is: match the destination address of the received multicast message, convert the multicast message into a unicast message according to the matching result, and then forward the converted unicast message, so that the non-group Users in the multicast network environment can receive multicast data packets.

[0036] The embodiments of the present invention will be further described below in conjunction with the drawings and examples.

[0037] The present invention provides a method for forwarding multicast packets, the process of which is as follows image 3 shown, including the following steps:

[0038] Step s101 , for a unicast address that needs to receive multicast packets of a specific multicast group, configure a correspondence between the multicast group address of the specific multicast group and the unicast address.

[0039] Specifically, for different multicast group addresses, they can be divided into two categories, nam...

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Abstract

The invention discloses a forwarding method and a device for the multicast message. The method includes the steps that for the unicast address of the multicast message which needs to receive the specified multicast group, the corresponding relationship of the multicast group address of the specified multicast group and the unicast address is configured; the received multicast group address in the multicast message is processed with matching; when the multicast group address of the multicast message is the specified multicast group address, the unicast address corresponding to the multicast group address is obtained according to the corresponding relationship; the multicast group address in the multicast message is replaced with the unicast address; and then the multicast message is forwarded. Based on the forwarding method and the device for the multicast message, the multicast group address of the received multicast message is processed with matching, realizing that the multicast message is switched to the unicast message; the switched unicast message is forwarded so that the user which is in the non-multicast network environment can receive the multicast data message.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and equipment for forwarding multicast messages. Background technique [0002] In the existing multicast technology, the destination address field of the IP message is a multicast group address, and the multicast source transmits information to the terminal group identified by the destination address. The multicast device implements the forwarding of the Layer 3 multicast message through the PIM (Protocol Independent Multicast, independent multicast protocol) protocol. Multicast routing is maintained using static routing and unicast routing tables generated by any unicast routing protocol. In the prior art, in order to realize multicast in the network, the figure 1 The networking environment shown is taken as an example. In order to ensure that the route between SWITCH1 and SWITCH2 is reachable, the PIM protocol is enabled on the multicast routing device and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/18H04L45/16
Inventor 郭振华
Owner NEW H3C TECH CO LTD
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