Method for IPv6 repeating vector IPv4/6 through inverse path

Abstract

The invention relates to an IPv4 / 6 multicast transition method which uses an RPF Vector in an IPv6 network and can improve the transport quality of IPv4 multicast by an IPv6 high speed backbone multicast network as well as map an isolated IPv4 network multicast tree into an IPv6 multicast network. The method adopts the technical proposal that: multicast trees in an IPv4 border network correspond to the multicast trees in an IPv6 core network one to one; when receiving a Join message, an edge router PE converts a source address and a multicast address pair (s, g) or (*, g) in the Join / Prune message into an IPv4-mapped IPv6 address (s', g') or (*, g'); and then the address of an egress edge router PE is put into a new Join message by the RPF Vector according to iBGP route so as to route in a core network; a P router in the core network supports the RPF Vector, routes and establishes or deletes a multicast routing table of (s', g') or (*, g') by the address of the Vector; when a multicast data packet reaches the PE, only the conversion of an IP address is needed.

Description

technical field [0001] The invention belongs to the field of IPv4 / 6 transition multicast technology, in particular to a method for IPv6 using reverse path forwarding vector IPv4 / 6. 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 wide application, 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. In this stage, the IPv6 network serves as a bridge connecting mu...

AI Technical Summary

Problems solved by technology

Among them, the scheme based on dual protocol stack, tunnel and application layer multicast does not make full use of the multicast support function of the core network, and does not realize the optimization of multicast

The NAT-PT-based solution continues the same limitations as the NAT-PT protocol

In addition, there are other multicast solutions, which mainly rely on manual configuration of multicast mapping relationships, resulting in poor customer scalability and manageability, and cannot support a large number of multicast groups at all.

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