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Method and system for address selection
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An address selection and address technology, applied in the field of network communication, can solve problems such as poor selectivity
Inactive Publication Date: 2008-01-23
HUAWEI TECH CO LTD
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[0029] The purpose of the present invention is to overcome the problem of poor selectivity when selecting addresses through DHCPv6 relay agents in the prior art, and provides a method and system for address selection
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Embodiment 1
[0075] Referring to FIG. 5 , a method for address selection, in which the client is a DHCPv6 client, the relay agent is a DHCPv6 relay agent, and the server is a DHCPv6 server.
[0076] At first, insert prefix selection option (Relay PrefixSelection Option) in the Relay-forward message format of DHCPv6 relay agent, this prefix selection option format is referring to Fig. 6,
[0080] Among them, the PS-Prefix option is used to describe each specific prefix in the trunk prefix selection option, and the specific format is shown in Figure 7.
[0081] OPTlON_PSPREFIX: prefix option;
[0082] Prefix-length: prefix length;
[0083] IPv6-prefix: IPv6 prefix;
[0084] Related options: Other options related to this prefix.
[0085] The method of the present invention specifically comprises the following steps:
...
Embodiment 2
[0110] Referring to FIG. 8, the present invention also provides a system for address selection, which includes a client, a relay agent, and a server;
[0111] Among them, the client is used to send an address request message and receive the address assigned by the server;
[0112] The relay agent is used to receive the request message sent by the client, determine the prefix list according to the selection strategy, and send the prefix list to the server, and at the same time, the relay agent is also used to receive the corresponding prefix list sent by the server. address;
[0113] The server is configured to receive the prefix list message sent by the relay agent, allocate the address corresponding to the prefix list according to an address allocation policy, and send the address corresponding to the prefix list to the relay agent.
[0114] The relay agent specifically includes a Relay-forward message module and a selection strategy module;
[0115] Among them, the Relay-f...
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Abstract
The present invention provides a method and a system for address selection, which belongs to the network communication field. The present invention provides an address selection method in order to solve the problem that the possibility of selection is poor when addresses are selected through the DHCPv6 relay agent. The method comprises that prefix selection options are inserted in the Relay-forward message format of a relay agent, a Relay-forward message is built and transmitted to a server, and after receiving the Relay-forward message, the server allocates the addresses corresponding to the prefixes in the prefix selection options. The present invention also provides a system of the address selection, which comprises a client side, the relay agent and the server. By adopting the technical proposal of the present invention, the server is reminded to allocate the address belonging to a specific prefix for a client side, and are reminded to allocate a plurality of addresses belonging to the a plurality of specific prefixes for the client side.
Description
technical field [0001] The invention relates to the field of network communication, in particular to an address selection method and system. Background technique [0002] DHCPv6 (Dynamic Host Configuration Protocol for IPv6, IP version 6 dynamic host configuration protocol) is a mechanism for dynamically assigning IPv6 addresses and configuration parameters. [0003] DHCPv6 adopts the client / server mode. The client submits a configuration application to the server. The application content includes: assigned IP address, subnet mask, default gateway and other parameters. The server returns corresponding configuration information according to the policy. The DHCPv6 message uses UDP (User Datagram Protocol, User Datagram Protocol) for encapsulation. [0004] Referring to Figure 1, the working process of DHCPv6 is as follows: [0005] 1. The DHCPv6 client looks for a DHCPv6 server: the DHCPv6 client sends a Solicit (request) message to look for a DHCPv6 server; [0006] 2. The...
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Application Information
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