WO2014101891A1

WO2014101891A1 - Method and device for configuring ip address

Info

Publication number: WO2014101891A1
Application number: PCT/CN2013/091156
Authority: WO
Inventors: 卢绪山; 黄敬; 周倩; 邹婷; 查敏
Original assignee: 华为技术有限公司
Priority date: 2012-12-31
Filing date: 2013-12-31
Publication date: 2014-07-03
Also published as: CN103916484A; CN103916484B

Abstract

Provided is a terminal device, comprising a sending unit, a receiving unit, and a processing unit. The sending unit is configured to send a router request (RS) message. The receiving unit is configured to receive a first router advertisement (RA) message, the first RA message is used for responding to the RS message, and carries a first IPv6 prefix and a first accessible network segment corresponding to the first IPv6 prefix. The processing unit is configured to generate a first IPv6 address according to the first IPv6 prefix, and configure a first address selecting policy table according to the first RA message. The first address selecting policy table comprises the first IPv6 address and the first accessible network segment corresponding to the first IPv6 address, and the first accessible network segment is used for identifying a network segment that can be accessed when the terminal device uses the first IPv6 address as a source address. By using this solution, an address selecting policy table can be configured automatically in a stateless address auto configuration mode.

Description

The present invention claims the priority of a Chinese patent application filed on December 31, 2012, the Chinese Patent Application No. CN 201210592011.4, entitled "Method and Apparatus for Configuring an IP Address", which The entire contents are incorporated herein by reference. Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a method and a device for configuring an IP address.

BACKGROUND OF THE INVENTION Due to the shortage of the Internet Protocol version 4 (Internet Protocol version 4), many operators have begun to deploy the sixth version of the Internet Protocol (Internet Protocol version 6, called IPv6) network to solve the public network. Business development issues after the IPv4 address is exhausted. Along with the deployment of IPv6 networks, new network models and business models emerged. In some models, the Customer Edge (CE) needs to connect to different Internet service providers (ISPs) and learn from different ISPs.

IPv6 prefix. Then, according to the obtained IPv6 prefix, the CE supports each IPv6 dynamic host configuration protocol (IPv6) or the stateless address auto configuration (SLAAC). An IPv6 terminal device, such as an IPv6 host (host), is configured with an IPv6 address.

The IETF proposes a scheme for address allocation. The CE obtains multiple IPv6 prefixes from multiple ISPs.

DHCPv6 or SLAAC assigns multiple IPv6 addresses to all terminal devices. When using DHCPv6 mode,

The CE allocates multiple IPv6 addresses to each terminal device according to the number of prefixes obtained. The number of addresses is the same as the number of acquired IPv6 prefixes. When using SLAAC, the CE passes the route advertisement (Router

The advertisement, the RA message, informs each terminal device of all IPv6 prefixes, and each terminal device generates multiple IPv6 addresses according to the obtained IPv6 prefix. Since the terminal device acquires multiple

IPv6 address, when the terminal device sends an IPv6 packet to the device, the IPv6 address must be selected as the source IP address. Otherwise, in some networks based on the source address authentication/filtering, the IPv6 packet sent by the terminal device will be Discard, resulting in the terminal device being unable to use the services provided by the network. RFC 3484 proposes an IPv6 default address selection method, which involves a default address selection algorithm and a default address selection policy table. When the terminal device sends a packet, the default algorithm cannot guarantee that the terminal device can select the correct source IPv6 address. Therefore, the IETF upgrades the RFC and replaces RFC3484 with RFC6724. However, RFC6724 does not define a mechanism for configuring an address selection policy table.

The Draf t_iet f_6man_addr_se lect_opt manuscript proposes how to implement the configuration and update of the address selection policy table when using the DHCPv6 mode, but does not give advice on the configuration of the address selection policy table when using the SLAAC mode.

SUMMARY OF THE INVENTION In view of the above, the embodiments of the present invention provide a method and a device for configuring an IP address, which are used to solve the problem that the configuration of the address selection policy table cannot be implemented when the SLAAC mode is used in the prior art.

In a first aspect, a method for configuring an IP address is provided, including: receiving a router request RS message sent by a terminal device; sending a first router advertisement RA message to the terminal device, where the first RA message is used to respond to the RS The message carries the first IPv6 prefix and the first accessible network segment corresponding to the first IPv6 prefix.

According to the first aspect, a first implementation manner is provided, where the first RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, where the sub-option includes the first Access the network segment.

According to the first aspect, a second implementation manner is provided, where the first RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 prefix, The prefix description option includes the first accessible network segment.

According to the first aspect or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, the third implementation manner is further provided, where the first RA message further includes the Internet corresponding to the first IPv6 prefix. Service Provider ISP ID.

According to the first aspect or the first implementation manner of the first aspect, or the second implementation manner of the first aspect, or the third implementation manner of the first aspect, the fourth implementation manner is further provided, where the method further includes: The terminal device sends a second RA message, where the second RA message carries a second IPv6 prefix and a second accessible network segment corresponding to the second IPv6 prefix.

The second aspect provides a method for configuring an IP address, including: receiving a router request RS message sent by a terminal device, and sending a router advertisement RA message to the terminal device, where the RA message is used by Responding to the RS message, and carrying an IPv6 prefix and an Internet Service Provider ISP identifier corresponding to the IPv6 prefix.

According to the second aspect, a first implementation manner is provided, where the RA message includes a prefix information option, where the prefix information option includes the IPv6 prefix and a sub-option, and the sub-option includes the ISP identifier.

According to the second aspect, a second implementation manner is provided, where the RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the IPv6 prefix, and the prefix description option The ISP logo is included.

In a third aspect, a network device is provided, including a receiving unit and a sending unit. The receiving unit is configured to receive a router request RS message sent by the terminal device. The sending unit is configured to send a first router advertisement RA message, where the first RA message is used to respond to the RS message, and carries a first IPv6 prefix and a first accessible network segment corresponding to the first IPv6 prefix.

According to the third aspect, a first implementation manner is provided, where the first RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, where the sub-option includes the first Access the network segment.

According to the third aspect, a second implementation manner is provided, where the first RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 prefix, The prefix description option includes the first accessible network segment.

According to the third aspect or the first implementation manner of the third aspect, or the second implementation manner of the third aspect, the third implementation manner is further provided, where the first RA message further includes the Internet corresponding to the first IPv6 prefix. Service Provider I SP logo.

According to the third aspect or any one of the foregoing implementation manners, the fourth implementation manner is provided, the sending unit is further configured to send a second RA message to the terminal device, where the second RA message carries the second The second accessible network segment corresponding to the IPv6 prefix and the second IPv6 prefix.

A fourth aspect provides a terminal device, including: a sending unit, a receiving unit, and a processing unit. The sending unit is configured to send a router request RS message. The receiving unit is configured to receive a first router advertisement RA message, where the first RA message is used to respond to the RS message, and carries a first IPv6 prefix and a first accessible network segment corresponding to the first IPv6 prefix. The processing unit is configured to generate a first IPv6 address according to the first IPv6 prefix, and configure a first address selection policy table according to the first RA message, where the first address selection policy table includes the first IPv6 address The first accessible network segment corresponding to the first IPv6 address, where the first accessible network segment is used to identify A network segment that can be accessed when the terminal device uses the first IPv6 address as a source address.

According to the fourth aspect, a first implementation manner is provided, where the first RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, where the sub-option includes the first Access the network segment.

According to the fourth aspect, a second implementation manner is provided, where the first RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 prefix, The prefix description option includes the first accessible network segment.

According to the fourth aspect, or any implementation of the fourth aspect, the receiving unit is further configured to receive a second RA message, where the second RA message carries a second IPv6 prefix and a second corresponding to the second IPv6 prefix. Access to the network segment. The processing unit is further configured to generate a second IPv6 address according to the second IPv6 prefix, and configure a second address selection policy table according to the second RA message, where the second address selection policy table includes the second IPv6 An address of the second accessible network segment corresponding to the second IPv6 address, where the second accessible network segment is used to identify a network segment that the terminal device can access when using the second IPv6 address as a source address. .

According to the technical solution provided, the RA message received by the terminal device carries an IPv6 prefix and an accessible network segment corresponding to the IPv6 prefix, and the terminal device can configure an address selection policy table according to the RA message, where the address selection policy table includes an IPv6 address. An accessible network segment corresponding to the IPv6 address. When the terminal device communicates with other devices, the appropriate IPv6 address can be selected as the source address according to the address selection policy table. Therefore, the solution of the embodiment of the present invention can implement automatic configuration of the address selection policy table in the SLAAC mode.

A fifth aspect provides a terminal device, including: a sending unit, a receiving unit, and a processing unit. The sending unit is configured to send a router request RS message. The receiving unit is configured to receive an RA message, where the RA message is used to respond to the RS message, and carries a first IPv6 prefix and an identifier of a first Internet service provider ISP corresponding to the first IPv6 prefix. The processing unit is configured to determine, from the first IPv6 prefix, a third IPv6 prefix corresponding to the ISP identifier preset by the terminal device, and generate a first IPv6 address by using the third IPv6 prefix.

According to the fifth aspect, a first implementation manner is provided, where the RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, and the sub-option includes the first ISP identifier.

According to the fifth aspect, a second implementation manner is provided, where the RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the foregoing An IPv6 prefix, the prefix description option including the first ISP identifier.

According to the technical solution provided, the RA message received by the terminal device carries an IPv6 prefix and an I SP identifier corresponding to the IPv6 prefix, and the terminal device can use the preset ISP identifier according to the local

The RA message, from the IPv6 prefix carried in the RA message, selects an IPv6 prefix corresponding to the preset ISP identifier to generate an IPv6 address. Therefore, the solution of the embodiment of the present invention can save an IPv6 address.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the following drawings are only drawings of some embodiments of the present invention. Other drawings of the technical solution of the present invention can also be obtained according to these drawings without any creative labor.

1 is a schematic diagram of a network structure in an embodiment of the present invention;

2 is a schematic diagram of signaling interaction of a bridge mode in an embodiment of the present invention;

3 is a schematic diagram of signaling interaction of a routing mode according to an embodiment of the present invention;

4 is a flowchart of a method for configuring an IP address according to an embodiment of the present invention;

Figure 5 is a RA message format diagram;

Figure 6 is a format diagram of the prefix information option in the RA message;

7 is a pref ix informat ion opt ion format diagram including a sub-opt ion according to an embodiment of the present invention;

8 is a format diagram of an RA message including a newly added pref ix descr opt ion opt ion according to an embodiment of the present invention;

9 is a format diagram of a pref ix descr ipt ion opt ion in a network according to an embodiment of the present invention;

10 is a flowchart of a method for configuring an IP address in an embodiment of the present invention;

11 is a flowchart of a method for configuring an IP address in still another embodiment of the present invention;

12 is a schematic diagram of a cylindrical structure of a network device according to an embodiment of the present invention;

13 is a schematic view showing a tubular structure of a terminal device according to an embodiment of the present invention;

FIG. 14 is a schematic diagram of a tubular structure of a terminal device according to an embodiment of the present invention; FIG.

15 is a schematic diagram of a cylindrical structure of a network device according to an embodiment of the present invention; 16 is a schematic diagram of a tubular structure of a terminal device according to an embodiment of the present invention;

Figure 17 is a schematic view showing the structure of a terminal device in an embodiment of the present invention.

The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the various embodiments described below are merely exemplary embodiments of the invention. Based on the following various embodiments of the present invention, those skilled in the art can obtain other technical features that can solve the technical problems of the present invention and achieve the technical effects of the present invention by equivalently transforming some or even all of the technical features without creative work. The various embodiments of the invention are apparent from the scope of the invention as disclosed.

FIG. 1 is a schematic diagram of a network structure in an embodiment of the present invention. As shown in FIG. 1, the terminal device 102 communicates through the CE 104, an access point (Acces s Node) 106, and a broadband remote acces s server (BRAS) 108. For example, the terminal device 102 can be a computer, an IP television (IPTV), a telephone, a medical terminal, or other terminal device. Fig. 1 exemplarily shows three terminal devices, but the embodiment of the present invention does not limit the number and types of terminal devices. The arrangement mode of the CE is also not limited in this embodiment. For example, the CE may be arranged in a bridge mode or a route mode.

FIG. 2 is a schematic diagram of signaling interaction of a bridge mode in an embodiment of the present invention. As shown in FIG. 2, when the arrangement mode of the CE is the bridge mode, the terminal device 102 and the BRAS 108 perform signaling interaction to configure an IPv6 address.

202. The terminal device 102 sends a router request message (Router Sol ic i tate Mes sage, called RS Mes sage ) to the BRAS 108. For example, when the interface is enabled, the terminal device sends an RS message requesting the router to generate a router advertisement message (Router Advertise s s s sage ).

The BRAS 108 sends a first RA message to the terminal device 102, and is configured to respond to the RS message, where the first RA message carries a first IPv6 prefix. The first IPv6 prefix may be one or more.

In an implementation manner, in addition to carrying the first IPv6 prefix, the first RA message further carries the first accessible network segment corresponding to the first IPv6 prefix.

In another implementation manner, in addition to carrying the first IPv6 prefix, the first RA cancellation The first ISP identifier corresponding to the first IPv6 prefix is also carried in the information.

In another implementation, in addition to carrying the first IPv6 prefix, the first RA message carries the first accessible network segment corresponding to the first IPv6 prefix, and carries the first IPv6 prefix. Corresponding first I SP identifier.

206. The terminal device 102 generates a first according to the first IPv6 prefix carried by the first RA message.

IPv6 address.

In the case that the first RA message carries the first accessible network segment corresponding to the first IPv6 prefix, the terminal device 102 may further configure a first address selection policy table according to the first RA message, where The first address selection policy table includes the first IPv6 address and the first accessible network segment corresponding to the first IPv6 address. For example, the first RA message carries a first IPv6 prefix 1 and a corresponding first accessible network segment 1, a first I Pv 6 prefix 2, and a corresponding first accessible network segment 2, and a first IPv6 prefix 3 And the corresponding first accessible network segment 3. The terminal device 102 receives the first RA message, generates a first IPv6 address 1 according to the first IPv6 prefix 1, and generates a first IPv6 address 2 according to the first IPv6 prefix 2, according to the first IPv6 prefix 3 Generate the first IPv6 address 3. The terminal device 102 further configures a first address selection policy table, where the first address selection policy table includes a first IPv6 address 1 and a corresponding accessible network segment 1, a first IPv6 address 2, and a corresponding accessible network segment 1, and The first IPv6 address 3 and the corresponding accessible network segment 3. With this scheme, automatic configuration of the address selection policy table in the SLAAC mode can be implemented.

When the terminal device 102 presets the third ISP identifier, the foregoing 206 is implemented as follows. In the case that the RA message carries the ISP identifier corresponding to the IPv6 prefix, the terminal device 102 may determine, according to the third ISP identifier, the third ISP identifier corresponding to the first IPv6 prefix. And generating, by the third IPv6 prefix, the first IPv6 address, as the IPv6 address of the terminal device 102. If the third ISP identifier does not exist in the ISP identifier corresponding to the first IPv6 prefix, the operation of generating an IPv6 address according to the first RA message is omitted, that is, the IPv6 address is not generated according to the first RA message. For example, the third ISP identifier is one. With this solution, when the terminal device 102 only needs one IPv6 address, even if the terminal device 102 receives multiple IPv6 prefixes, it can generate an IPv6 address according to a preset ISP identifier and the received RA message. Address waste can be avoided, and the trouble of selecting the source address is omitted when sending a message.

In a case where the first RA message carries the first accessible network segment corresponding to the first IPv6 prefix and the first ISP identifier, the terminal device 102 receives the first RA message, if the terminal device The third IPv6 prefix corresponding to the third ISP identifier is selected from the first IPv6 prefix that is carried by the first RA message, and the third IPv6 prefix is generated according to the third IPv6 prefix. The first IPv6 address. If the third ISP identifier does not exist in the ISP identifier corresponding to the first IPv6 prefix, the operation of generating an IPv6 address according to the first RA message is omitted. If the terminal device 102 does not have a preset ISP identifier, the first IPv6 address may be generated according to the first RA message, and the first address selection policy table is configured.

Optionally, the embodiment described in FIG. 2 may further include

208. The BRAS 108 sends a second RA message. The second RA message carries a second IPv6 prefix. The second IPv6 prefix may be one or more. The second IPv6 prefix may be the same as the first IPv6 prefix, or may be different. For example, one or more of the plurality of the second IPv6 prefixes may be one or more of the first IPv6 prefixes. the same. For example, the second RA message may be sent periodically.

210. The terminal device 102 generates a second IPv6 address according to the second RA message.

For example, the second RA message may further carry a second accessible network segment corresponding to the second IPv6 prefix, and the terminal device 102 may generate a second IPv6 address according to the second RA message, and configure the first And a second address selection policy table, where the second address selection policy table includes the second IPv6 address and the second accessible network segment corresponding to the second IPv6 address.

For example, the second RA message may further carry the second ISP identifier corresponding to the second IPv6 prefix. If the terminal device 102 locally presets the third ISP identifier, the terminal device 102 may be configured according to the foregoing. a second RA message, the fourth IPv6 prefix corresponding to the third ISP identifier is determined from the second IPv6 prefix, and the second IPv6 address is generated according to the fourth IPv6 prefix, as the IPv6 of the terminal device 102 address. If the third ISP identifier does not exist in the ISP identifier corresponding to the second IPv6 prefix, the operation of generating an IPv6 address according to the second RA message is omitted.

For example, the second RA message carries the second IPv6 prefix corresponding to the second IPv6 prefix and the second IPv6 prefix. I SP logo. The terminal device 102 receives the second RA message, and if the terminal device 102 locally presets a third ISP identifier, the third ISP identifier may be determined from the second IPv6 prefix according to the second RA message. Corresponding fourth IPv6 prefix, generating a second IPv6 address according to the fourth IPv6 prefix. If the third ISP identifier does not exist in the ISP identifier corresponding to the second IPv6 prefix, the operation of generating an IPv6 address according to the second RA message is omitted. in case The terminal device 102 does not have a preset ISP identifier locally, and may generate a second IPv6 address according to the second RA message, and configure a second address selection policy table.

FIG. 3 is a schematic diagram of signaling interaction of a routing mode according to an embodiment of the present invention. As shown in FIG. 3, when the arrangement mode of the CE is the routing mode, the terminal device 102 and the CE 104 perform signaling interaction to configure an IPv6 address. 302. The terminal device 102 transmits an RS message to the CE 104. For example, when the interface is enabled, the terminal device sends an RS message requesting the router to generate the first RA message. The CE 104 sends the first RA message to the terminal device 102, and is configured to respond to the RS message, where the first RA message carries the first IPv6 prefix. 306. The terminal device 102 generates a first IPv6 address according to the first RA message. Optionally, the embodiment described in FIG. 3 may further include 308. The CE 104 sends a second RA message. For example, the second RA message may be sent periodically. 310. The terminal device 102 generates a second IPv6 address according to the second RA message. The specific technical details of the embodiment shown in FIG. 3 are similar to the embodiment shown in FIG. 2, and details are not described herein again.

4 is a flow chart of a method for configuring an IP address in an embodiment of the present invention. As shown in FIG. 4, 402. Receives an RS message sent by the terminal device 102. 404. Send the first RA message to the terminal device 102, where the first RA message is used to respond to the RS message and carry a first IPv6 prefix. Alternatively, the embodiment described in FIG. 4 may further include 406. transmitting a second RA message to the terminal device 102, the second RA message carrying a second IPv6 prefix. Optionally, the second RA message may be sent periodically. The implementation details of the embodiment shown in Fig. 4 are similar to those of the embodiment shown in Figs. 2 and 3, and will not be described again here. If the executor of the method shown in FIG. 4 is the CE 104, the CE 104 obtains the information corresponding to the IPv6 prefix from the BRAS 108, and the information corresponding to the IPv6 prefix may be at least one of the following information: ISP identifier, accessible network segment . For example, the CE 104 obtains the information corresponding to the IPv6 prefix from the BRAS 108, and may adopt the SLAAC mode RS and RA signaling interaction scheme, or the signaling interaction defined by the Draf t-iet f-6man-addr-se lect-opt. The solution is not limited in this embodiment.

RFC 4861 defines the format of the RS message and the format of the RA message. For example, the RS message in the foregoing embodiment may be in the format defined by RFC4861, and details are not described herein again. The RA message defined by RFC4861 is shown in Figure 5. For the definition of the field shown in Figure 5, please refer to RFC4861. RFC4861 also defines the prefix information option (pref ix informat ion opt ion ) in the RA message. The prefix information option can be one or more. See Figure 6, where the Type field is 3 and the Length field. For the definition of other fields, please refer to RFC4861. The RFC4861 defines the pref ix informat opt ion, which will not be described here. The RA message in the embodiment of the present invention carries IPv6 before Having an IPv6 prefix corresponding to the IPv6 prefix; or carrying an IPv6 prefix and an ISP identifier corresponding to the IPv6 prefix; or carrying an IPv6 prefix, an accessible network segment corresponding to the IPv6 prefix, and an ISP corresponding to the IPv6 prefix Logo.

For example, a sub-option may be added to the prefix information opt ion of the RA message automatically configured by the stateless address to indicate which ISP the IPv6 prefix belongs to in the prefix information option (other places in the text) The cylinder is called the "ISP identifier corresponding to the IPv6 prefix", and/or the IPv6 address generated by the IPv6 prefix is used as the source IP address when the terminal device accesses the network segment (the other part in the text is called the "accessible network corresponding to the IPv6 prefix". segment";). FIG. 7 is a diagram showing a format of a prefix information option including the sub-option in an embodiment of the present invention. As shown in Figure 7, the length is no longer fixed to 4, but is filled according to the actual length of the option. The last part of the prefix information option is a variable-length sub-option. The sub-option field is at least one of the following information: an ISP identifier, an accessible network segment. On some IPv6 terminals with specific functions, only one IPv6 address is required. For this type of IPv6 terminal, the ISP can preset the ISP identifier on the terminal or terminal software provided to the user. The terminal or terminal software of the ISP identifier is preset. When the IPv6 address of the RA message is generated according to the RA message, the matching prefix information option is selected according to the preset ISP identifier, and the prefix information option carries ^; IPv6 The front t generates an IPv6 address. The accessible network segment shown in Figure 7 indicates that when the terminal device accesses the network segment in the sub-option, the source IPv6 address used should be the IPv6 address generated according to the prefix in the prefix information opt ion. When receiving the RA message, the terminal device may select an address selection policy table defined by RFC6724 according to the accessible network segment. The configuration, addition, modification, and deletion of the address selection policy table can be performed according to the prefix information opt ion and sub-opt ion of the RA message. For example, when the RA message includes multiple prefixes, the RA message may include multiple prefix information options, and each prefix information option may adopt the format shown in FIG. 7. With this scheme, if a prefix RA message information option does not carry the sub-opt ion, or the contents of the sub-opt ion content is empty, or the sub-opt ion to a specific value, expressed shell ¹ J The IPv6 prefix in the Prefix information option is the default IPv6 prefix. The terminal device can generate a default IPv6 address according to the default IPv6 prefix. When the terminal device queries the address selection policy table according to the destination address to be accessed to determine the source IP address, if the accessible network segment in the address selection policy table does not include the destination address to be accessed, the terminal device adopts the default The IPv6 address is used as the source IP address to access the destination address. In another embodiment, a new option may be added to the RA message, such as a prefix description option (prefix descr opt ion ), which is followed by the prefix information opt ion as a supplementary description of the prefix information opt ion. The prefix descr ipt ion opt ion is used to describe the ISP corresponding to the IPv6 prefix in the prefix information option, and/or the corresponding accessible network segment. FIG. 8 is a diagram showing an RA message format including a prefix description option added in an embodiment of the present invention. Each prefix information option^ follows a corresponding prefix descr pt ion, and the prefix information opt ion has a Type of 3. Figure 9 is a diagram showing the format of a prefix description option in one embodiment of the present invention. As shown in FIG. 9, the prefix description opt ion includes type, length, reserved, and option data (opt ion-data). Where type is a newly defined value, such as 10, or 20, or other values not defined in RFC4861. The opt ion-data includes the option data corresponding to the prefix in the prefix information option, and may be at least one of the following information: an ISP identifier, an accessible network segment.

FIG. 10 is a flow chart of a method for configuring an IP address in an embodiment of the present invention. As shown in FIG. 10, the method method includes: 1002. The terminal device 102 sends an RS message. 1004. The terminal device 102 receives the first RA message. 1006. The terminal device 102 generates a first IPv6 address according to the first RA message, and configures a first address selection policy table.

Optionally, the method shown in FIG. 10 may further include: 1008. The terminal device 102 receives the second RA message. 1010. The terminal device 102 generates a second IPv6 address according to the second RA message, and configures a second address selection policy table.

Optionally, the method shown in FIG. 10 may further include 1012 before 1006. Determine whether the terminal device 102 presets the ISP identifier. If the ISP ID is not preset, perform the above 1006. If the ISP identifier is preset, execution 1014. Generate a first IPv6 address according to the preset ISP identifier and the first RA message.

11 is a flow chart of a method for configuring an IP address in still another embodiment of the present invention. As shown in Figure 11,

1102. The terminal device 102 transmits an RS message. 1104. The terminal device 102 receives the first RA message. 1106. The terminal device 102 determines whether the ISP identifier is preset locally. If it is determined that the local ISP identifier is preset, 1108 is performed. 1108. The terminal device 102 generates a first IPv6 address according to the preset I SP identifier and the first RA message. Optionally, the embodiment shown in FIG. 11 may further include 1110. The terminal device 102 receives the second RA message. The terminal device 102 generates a second IPv6 address according to the preset ISP identifier and the second RA message. For details of the implementation of the method shown in FIG. 10 and FIG. 11, refer to the foregoing embodiment, and details are not described herein again.

Figure 12 is a block diagram showing the structure of the network device 1200 in one embodiment of the present invention. The network device 1200 includes a receiving unit 1202 and a transmitting unit 1204. The receiving unit 1202 is configured to receive an RS message sent by the terminal device. The sending unit 1204 is configured to send a first RA message, where the first RA message is used to respond to the RS message. Optionally, the sending unit 1204 is further configured to send a second RA message. The second RA message may be sent periodically. Optionally, the network device 1200 may further include a generating unit 1206, configured to generate the first RA message. Optionally, the generating unit 1206 is further configured to generate the second RA message. The network device shown in Fig. 12 may be the BRAS 108 shown in Fig. 1, or the CE 104 shown in Fig. 3. If the network device is the CE 104 shown in FIG. 3, the network device 1200 may further include a processing unit 1208, configured to obtain information corresponding to an IPv6 prefix, such as an accessible network segment, from the BRAS 108 shown in FIG. And / or, ISP logo. Correspondingly, the generating unit 1206 is configured to generate the first RA message and/or the second RA message according to the information corresponding to the IPv6 prefix obtained by the processing unit 1208.

Figure 13 is a schematic view showing the structure of the terminal device 1300 in an embodiment of the present invention. The terminal device 1300 includes a transmitting unit 1302, a receiving unit 1304, and a processing unit 1306. The transmitting unit 1302 is for transmitting an RS message. The receiving unit 1304 is configured to receive a first RA message that is responsive to the RS message. The processing unit 1306 is configured to generate a first IPv6 address according to the first RA message, and configure a first address selection policy table. Optionally, the receiving unit 1304 is further configured to receive the second RA message. The second RA message may be sent periodically. The processing unit 1306 is further configured to generate a second IPv6 address according to the second RA message, and configure a second address selection policy table. Optionally, the processing unit 1306 is specifically configured to determine whether the terminal device 1300 presets an ISP identifier, and if the ISP identifier is preset, generates a first IPv6 according to the preset ISP identifier and the first RA message. If the ISP identifier is not preset, the first IPv6 address is generated according to the first RA message, and the first address selection policy table is configured. Optionally, the terminal device 1300 may further include a storage unit, configured to store the preset ISP identifier.

Figure 14 is a schematic view showing the structure of the terminal device 1400 in an embodiment of the present invention. The terminal device 1400 includes a transmitting unit 1402, a receiving unit 1404, and a processing unit 1406. The sending unit 1402 is configured to send an RS message. The receiving unit 1404 is configured to receive a first RA message that is responsive to the RS message. The processing unit 1406 is configured to determine whether the terminal device 1400 presets an ISP identifier, and if the ISP identifier is preset, generate a first according to the preset ISP identifier and the first RA message. IPv6 address. Optionally, the receiving unit 1404 is further configured to receive the second RA message. The processing unit 1406 is further configured to generate a second IPv6 address according to the preset I SP identifier and the second RA message. Optionally, the terminal device 1400 may further include a storage unit, configured to store the preset ISP identifier.

In the embodiments shown in Figures 12, 13 and 14, the division of each unit is merely an example. In actual applications, the above operations may be assigned differently according to needs, such as configuration requirements of corresponding hardware or convenience of implementation of software. The unit is completed to perform all or part of the functions described above. The implementation details of the embodiment shown in Figures 12-14 have been described in the previous embodiments and will not be described again.

FIG. 15 is a schematic diagram showing the structure of a network device in an embodiment of the present invention. As shown in FIG. 15, the network device 1500 includes an input/output circuit (I/O c i rcui t) 1502, a processor sor 1504, and a memory 1506. The input/output circuit 1502 is configured to receive an RS message sent by the terminal device, and send a first RA message, where the first RA message is used to respond to the RS message. Optionally, the input/output circuit 1502 is further configured to send a second RA message. The second RA message may be sent periodically. The processor 1504 is configured to generate the first RA message. Optionally, the processor 1504 is further configured to generate the second RA message. The memory 1506 is for storing program instructions that, when executed, cause the processor 1504 to perform the above operations.

The network device shown in Fig. 15 may be the BRAS 108 shown in Fig. 1, or the CE 104 shown in Fig. 3. If the network device is the CE 104 shown in FIG. 3, the processor 1504 is further configured to obtain information corresponding to the IPv6 prefix from the BRAS 108 shown in FIG. 3, such as an accessible network segment, and/or an ISP identifier. .

Figure 16 is a block diagram showing the structure of a terminal device in an embodiment of the present invention. As shown in FIG. 16, the terminal device 1600 includes an input/output circuit (I/O ci rcui t) 1602, a processor (proces sor) 1604, and a memory 1606. The input/output circuit 1602 is configured to send an RS message, and receive a first RA message that is responsive to the RS message. The processor 1604 is configured to generate a first IPv6 address according to the RA message, and configure a first address selection policy table. Optionally, the input/output circuit 1602 is further configured to receive a second RA message. The second RA message may be sent periodically. The processor 1604 is further configured to generate a second IPv6 address according to the second RA message, and configure a second address selection policy table. Optionally, the processor 1604 is specifically configured to determine whether the terminal device 1600 presets an I SP identifier, and if the ISP identifier is preset, generates a first according to the preset ISP identifier and the first RA message. IPv6 address; if there is no preset ISP ID, then Generating the first IPv6 address according to the first RA message, and configuring the first address selection policy table. The memory 1606 is for storing program instructions that, when executed, cause the processor 1604 to perform the operations described above. Optionally, the memory 1606 is further configured to store the preset ISP identifier.

Figure 17 is a block diagram showing the structure of a terminal device in an embodiment of the present invention. As shown in FIG. 17, the terminal device 1700 includes an input/output circuit (I/O c i rcui t) 1702, a processor (proces sor) 1704, and a memory 1706. The input/output circuit 1702 is configured to send an RS message, and receive a first RA message that is responsive to the RS message. The processor 1704 is configured to determine whether the terminal device 1700 presets an I SP identifier, and if the ISP identifier is preset, generates a first IPv6 address according to the preset ISP identifier and the first RA message. Optionally, the input/output circuit 1702 is further configured to receive a second RA message. The processor 1704 is further configured to generate a second IPv6 address according to the preset ISP identifier and the second RA message. The memory 1706 is for storing program instructions that, when executed, cause the processor 1704 to perform the operations described above. Optionally, the memory 1706 is further configured to store the preset ISP identifier.

It will be understood by those skilled in the art that all or part of the steps of implementing the foregoing method embodiments may be performed by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps of the foregoing method embodiments are performed; and the foregoing storage medium includes: a read-only memory (R0M), a random access memory (random acces s memory) ) A variety of media that can store program code, such as a disk or a disc.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. The scope of the program.

Claims

Rights request

A method for configuring an IP address, comprising:

Receiving a router request RS message sent by the terminal device;

Transmitting, by the terminal device, a first router advertisement RA message, where the first RA message is used to respond to the RS message, and carries a first IPv6 prefix and a first accessible network segment corresponding to the first IPv6 prefix.

The method according to claim 1, wherein the first RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, and the sub-option includes the The first accessible network segment.

The method according to claim 1, wherein the first RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 a prefix, the prefix description option including the first accessible network segment.

The method according to any one of claims 1-3, wherein the first RA message further includes an Internet service provider I SP identifier corresponding to the first IPv6 prefix.

The method according to any one of claims 1 to 4, further comprising:

Sending a second RA message to the terminal device, where the second RA message carries a second IPv6 prefix and a second accessible network segment corresponding to the second IPv6 prefix.

6. A method for configuring an IP address, the method comprising:

Receiving a router request RS message sent by the terminal device;

And sending, by the terminal device, a router advertisement RA message, where the RA message is used to respond to the RS message, and carries an IPv6 prefix and an Internet service provider I SP identifier corresponding to the IPv6 prefix.

The method according to claim 6, wherein the RA message includes a prefix information option, and the prefix information option includes the IPv6 prefix and a sub-option, and the sub-option includes the I SP identifier.

The method according to claim 6, wherein the RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the IPv6 prefix, The prefix description option includes the I SP identifier.

A network device, comprising: a receiving unit and a sending unit, wherein the receiving unit is configured to receive a router request RS message sent by the terminal device; The sending unit is configured to send a first router advertisement RA message, where the first RA message is used to respond to the RS message, and carries a first IPv6 prefix and a first accessible network segment corresponding to the first IPv6 prefix.

The apparatus according to claim 9, wherein the first RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, and the sub-option includes the The first accessible network segment.

The apparatus according to claim 9, wherein the first RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 a prefix, the prefix description option including the first accessible network segment.

The device according to any one of claims 9-11, wherein the first RA message further includes an Internet service provider ISP identifier corresponding to the first IPv6 prefix.

The device according to any one of claims 9-12, wherein the sending unit is further configured to send a second RA message to the terminal device, where the second RA message carries a second IPv6 prefix and a The second accessible network segment corresponding to the second IPv6 prefix.

A terminal device, comprising: a sending unit, a receiving unit, and a processing unit; wherein

The sending unit is configured to send a router request RS message;

The receiving unit is configured to receive a first router advertisement RA message, where the first RA message is used to respond to the RS message, and carries a first IPv6 prefix and a first accessible network segment corresponding to the first IPv6 prefix;

The processing unit is configured to generate a first IPv6 address according to the first IPv6 prefix, and configure a first address selection policy table according to the first RA message, where the first address selection policy table includes the first IPv6 address The first accessible network segment corresponding to the first IPv6 address, where the first accessible network segment is used to identify a network segment that the terminal device can access when using the first IPv6 address as a source address.

The device according to claim 14, wherein the first RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, and the sub-option includes the The first accessible network segment.

The apparatus according to claim 14, wherein the first RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 a prefix, the prefix description option including the first accessible network segment.

The device according to any one of claims 14-16, wherein the receiving unit is further configured to receive a second RA message, where the second RA message carries a second IPv6 prefix and the second IPv6 prefix. Corresponding second accessible network segment;

The processing unit is further configured to generate a second IPv6 address according to the second IPv6 prefix, and configure a second address selection policy table according to the second RA message, where the second address selection policy table includes the second IPv6 An address of the second accessible network segment corresponding to the second IPv6 address, where the second accessible network segment is used to identify a network segment that the terminal device can access when using the second IPv6 address as a source address. .

A terminal device, comprising: a transmitting unit, a receiving unit, and a processing unit; wherein

The sending unit is configured to send a router request RS message;

The receiving unit is configured to receive an RA message, where the RA message is used to respond to the RS message, and carries a first IPv6 prefix and an identifier of a first Internet service provider ISP corresponding to the first IPv6 prefix;

The processing unit is configured to determine, from the first IPv6 prefix, a third IPv6 prefix corresponding to the ISP identifier preset by the terminal device, and generate a first IPv6 address by using the third IPv6 prefix.

The apparatus according to claim 18, wherein the RA message includes a prefix information option, where the prefix information option includes the first IPv6 prefix and a sub-option, and the sub-option includes the first ISP logo.

The apparatus according to claim 18, wherein the RA message includes a prefix information option and a prefix description option corresponding to the prefix information option, where the prefix information option includes the first IPv6 prefix, The prefix description option includes the first ISP identifier.