Abstract: A method for releasing an address, a user node and a remote access server are disclosed. The method includes: when releasing an Internet protocol version 6 (IPv6) address, a user node notifying the released IPv6 address to nodes within a scope of a local link. In the above technical scheme, when releasing the IPv6 address generated through a prefix, the user node notifies the released IPv6 address to the nodes within the scope of the local link, which enhances the accuracy of charging, improves the user experience, and plays a role of address resource recovery within the scope of the local link, thereby being able to reuse address resources released by the user in the network.

Abstract: A method for releasing an address, a user node and a remote access server are disclosed. The method includes: when releasing an Internet protocol version 6 (IPv6) address, a user node notifying the released IPv6 address to nodes within a scope of a local link. In the above technical scheme, when releasing the IPv6 address generated through a prefix, the user node notifies the released IPv6 address to the nodes within the scope of the local link, which enhances the accuracy of charging, improves the user experience, and plays a role of address resource recovery within the scope of the local link, thereby being able to reuse address resources released by the user in the network.

Abstract: A method and system for managing IPv6 address conflict automatically are provided. The method comprises: after receiving a DAD message of a terminal, a BRAS searching local records to judge whether there is an interface identifier in the DAD message under a prefix which is the same with a local routing prefix in the DAD message, and if yes, then transmitting a reconfiguration message to the terminal; otherwise, then recording the interface identifier.