A method and system to realize the automatic learning of IPv6 route of edge device in the tunnel

Abstract

The invention discloses a method and a system which are used for automatically learning the routing information of a tunnel edge device IPv6. The method comprises that an interface of 6to4 tunnel source of the tunnel edge device joins the multicast group which is preset in IPv4 network and becomes a member of the multicast group; an interface of 6to4 tunnel source of the repeater equipment registers at the preset multicast group and becomes a multicast source; the multicast source seals the learned IPv6 routing information of the IPv6 network in the IPv4 multicast message and sends the message to the downriver members of the multicast group; after receiving the IPv4 multicast message, the tunnel edge device which belongs to the members of the multicast group lead the next hop going into IPv6 routing to point at the 6to4 address of the multicast source. The invention conveniently and flexibly realizes the learning from the tunnel edge device to IPv6 routing and keeps the flexibility and expansibility of 6to4 tunnel.

Description

technical field [0001] The invention relates to the technical field of IPv6 in IPv4 tunnels, in particular to a method and system for realizing automatic learning of IPv6 routing information of tunnel edge equipment. Background technique [0002] The tunneling technology can cross the IPv4 (Internet Protocol Version 4, Internet Protocol Version 4) network to realize the intercommunication of the IPv6 (Internet Protocol Version 6, Internet Protocol Version 6) network. Among them, since the 6to4 tunnel does not need to specify the tunnel destination address, it has good scalability and flexible deployment. [0003] A working scenario of a 6to4 tunnel is shown in Figure 1: an IPv6 host with at least one 6to4 address (6to4 host for short) 1A communicates with another 6to4 host 1B through the 6to4 tunnel between the respective tunnel edge devices 2A and 2B respectively . Among them, the tunnel edge device refers to devices such as routers or switches that can support cross-IPv4...

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Problems solved by technology

[0006] It can be seen that manual neighbor configuration is required in the above process, that is, each tunnel edge device needs to configure all relays at the other end of the tunnel as neighbors; this manual neighbor configuration method not only makes the 6to4 tunnel flexible and scalable The advantage is completely obliterated, and at the same time, as the network expands, its implementation will become extremely troublesome

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