Multicast implementing method based on independent multicast-special source protocol in flexible wire type tunnel

An independent multicast and soft line technology, applied in the branch office to provide special service devices, data exchange details, data exchange through path configuration, etc., can solve the problem of not solving the implementation method of edge network multicast

Inactive Publication Date: 2010-06-02
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of intercommunication between IPv4 networks through IPv6 networks, IETF established the Softwirc working group, and proposed an IPv4 over IPv6 unicast solution in the mesh-framework draft, which solves the routing information of the edge network (E- IP routing information) how to propagate to edge routers (PE routers) and other edge networks through the core network (I-IP network), but there is still no solution to the realization of multicast between different edge networks

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  • Multicast implementing method based on independent multicast-special source protocol in flexible wire type tunnel
  • Multicast implementing method based on independent multicast-special source protocol in flexible wire type tunnel
  • Multicast implementing method based on independent multicast-special source protocol in flexible wire type tunnel

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Embodiment Construction

[0019] In softwire, the most basic composition is several E-IP networks and an I-IP core network, wherein E-IP and I-IP can take IPv4 or IPv6 respectively, that is to say, the scheme of the present invention is applicable to IPv4 over IPv6 and IPv6 over IPv4 scenarios. Such a network connection can be used figure 1 to describe.

[0020] From the perspective of the establishment of the static multicast tree in the I-IP transmission network, at the beginning, each PE router needs to inform all other PE routers of the multicast address of the multicast tree with itself as the source, which is through MP-BGP The protocol is implemented, and the format of the message is as follows figure 2 shown. In the figure, SAFI_STATIC_SSM indicates the SAFI value corresponding to this message, the Next Hop field is filled with the multicast address to be announced, and the SNPA and NLRI information are both 0.

[0021] From the perspective of the establishment of the multicast tree, when ...

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Abstract

The invention discloses a multicast realization method based on an independent multicast-special source protocol in a cord type tunnel and belongs to the IPv4-to-IPv6 network transition technical field. The invention is characterized in that: the method is realized based on the multicast mode of a PIM-SSM tree under the frame of a Softwire transition technology of the IETF, and orderly comprises the following procedures that: an edge router of the IPv6 network acquires the addresses of other edge routers; each edge router is provided with a multicast tree which reaches other edge routers; a connecting message, which the IPv4 network taken as a receiver sends to the other IPv4 network taken as a multicast source, is made a singlecast in the IPv6 network; a multicast data message that the IPv4 network taken as a multicast source sends to the other IPv4 network taken as a receiver is made a multicast in the IPv6 network. The invention realizes the method which a multicast is made among the isolated IPv4 networks through the IPv6 network.

Description

technical field [0001] The invention relates to a method for realizing multicast based on independent multicast-specific source protocol in soft wire tunnel, which belongs to the technical field of transition from IPv4 to IPv6 network. Background technique [0002] Due to the severe shortage of IPv4 address space, the next generation Internet based on IPv6 will develop rapidly. However, because the IPv4 Internet already has a considerable scale and a wide range of applications, the IPv4 network will inevitably exist for a long time in the future, forming a process of gradual integration with the next-generation IPv6 network. With the establishment of the IPv6 backbone network, a new technology needs to be introduced to connect IPv4 end users through the fast and efficient IPv6 backbone network to improve the service quality of the network. In addition, with the gradual abandonment of the IPv4 network, there will be a transitional stage where the IPv4 network is disconnected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46H04L12/18H04L12/56H04L29/06H04L45/741
Inventor 徐明伟崔勇吴建平周云涛
Owner TSINGHUA UNIV
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