| Similar to the IPv4's DHCP,IPv6 provides nodes who in the same link a set of stateful address auto-configuration which called HDCPv6. By this way the IPv6 address is managed by the DHCP server,the address is in a certain period of life,when life reaches the address, the address may change, but the relationship between these changes and the node address are through DHCP server management, do not need to node interest.However, IPv6 not only provides a stateful address auto-configuration, it also provides another kind of stateless address auto-configuration technology for distribution node address in the same link, getting address by stateless address auto-configuration does not need to have a DHCP server, only through the interaction between the router and the the node can make each node link within the address to interoperability effect. Generally, the IPv6 address can be divided into two parts: the first part is called the network prefix, and the second part is called the interface ID.According to the interface of ID generation in different ways, IPv6 address auto?configuration the state is divided into two categories, one is the stability of the IPv6 address, the other is the unstable IPv6 address, depending on the IPv6 in the same subnet address will change. Once the link memory in the unstable IPv6 address, when after a period of time, if the node's IPv6 address changed, because there is no DHCP server management, other nodes do not know to change the node's IPv6 address, so there will be the node with other nodes to normal communication problems.This paper focuses on the technology of IPv6 address allocation, and for the unstable IPv6 address will be the characteristic changes brought about by the problem of the solution is given, and through the experiment proves the proposed solution is feasible. |
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