WO2012041168A1

WO2012041168A1 - Processing method for network connection for ipv6 network and device thereof

Info

Publication number: WO2012041168A1
Application number: PCT/CN2011/079787
Authority: WO
Inventors: 彭朝华; 全晓璐
Original assignee: 华为终端有限公司
Priority date: 2010-09-29
Filing date: 2011-09-17
Publication date: 2012-04-05
Also published as: CN102143050A

Abstract

Provided are a processing method for network connection for an IPv6 network and a device thereof. The method comprises: receiving a message sent by a terminal device; acquiring a network access server interface corresponding to a dynamic host configuration protocol DHCPv6 prefix according to the DHCPv6 prefix of IPv6 in the source IPv6 address included in the message; and routing and forwarding the message to a broadband access server via the network access server interface. In the embodiments of the present invention, after a message sent by a terminal device is received, a network access server interface corresponding to the prefix in the source IPv6 address included in the message is found, and then the message is routed and forwarded to a broadband access server via the network access server interface, solving the problem that the terminal device cannot access the network.

Description

Network connection processing method and device for IPv6 network

The present invention relates to the field of communications technologies, and in particular, to a network connection processing method and apparatus for an IPv6 network.

Background technique

In the network of the next generation Internet Protocol (ie, Internet Protocol Version 6, Internet Protocol Version 6, below: IPv6), the network access server (Network Access Server, the following cartridge is called: N AS) interface In the networking mode, the LAN (Local Area Network, the following is called: LAN) side device access to the Internet is:

Step a, the home gateway (Home Gateway, the following is called: HGW) NAS interface 1 and NAS interface 2 (the HGW includes two NAS interfaces as an example, the HGW can include multiple NAS interfaces) respectively from the broadband access The server (Broadband Remote Access Server, the following is called: BRAS) gets the IPv6 Dynamic Host Configuration Protocol for IPv6 (hereinafter referred to as: DHCPv6) prefix (DHCPv6 Identity Association for Prefix Delegation, the following is called : PD ) 1 and PD2; wherein the binding relationship stored in the BRAS is: NAS interface 1 corresponds to PD1, NAS interface 2 corresponds to PD2; Step a2, HGW sends PD1 and PD2 to multiple LAN side devices, for example : The HGW sends the PD1 to the LAN side device 1, and the HGW sends the PD2 to the LAN side device 2;

In step a3, the LAN side device 1 and the LAN side device 2 respectively generate a global unicast IPv6 address (Global-Unicast IPv6 address, referred to as GUA) 1 and GUA2 according to PD1 and PD2; Step a4, LAN side device 1 and LAN side The device 2 communicates with the external network according to the GUA1 and the GUA2 respectively. Specifically, when the LAN-side device 1 communicates with the external network according to the GUA1, the routing can be forwarded through a default route, where the default route is the NAS interface 1 or the NAS interface 2 And, the generation of the default route has a certain randomness.

However, in step a4, if the NAS interface 2 is used as the default route, when the LAN side device 1 accesses the Internet through the GUA1, the BRAS detects the message through the packet sent by the LAN side device 1. The corresponding binding relationship is the PD1 and the NAS interface 2, and the binding relationship is inconsistent with the binding relationship stored in the BRAS. Therefore, the BRAS discards the packet, so that the LAN side device 1 cannot access the Internet, so in the IPv6 network, There is a situation where the terminal device cannot access the Internet. Summary of the invention

The embodiments of the present invention provide a network connection processing method and device for an IPv6 network, which are used to solve the problem that a terminal device cannot access the Internet in an IPv6 network.

An embodiment of the present invention provides a network connection processing method for an IPv6 network, including: receiving a packet sent by a terminal device;

Obtaining a network access server interface corresponding to the DHCPv6 prefix according to a dynamic host setting protocol DHCPv6 prefix in the source ι _ν 6 address included in the address;

And forwarding the packet route to the broadband access server by using the network access server interface. An embodiment of the present invention provides a network connection processing apparatus for an IPv6 network, including: a receiving module, configured to receive a packet sent by a terminal device;

And an obtaining module, configured to acquire, according to a dynamic host setting protocol DHCPv6 prefix of the IPv6 address in the source IPv6 address that is received by the receiving module, a network access server interface corresponding to the DHCPv6 prefix;

And a route forwarding module, configured to forward the packet route to the broadband access server by using the network access server interface acquired by the acquiring module.

The network connection processing method and device for the IPv6 network in the embodiment of the present invention, after receiving the packet sent by the terminal device, find the network access server corresponding to the DHCPv6 prefix in the source IPv6 address included in the packet. The interface then forwards the packet to the broadband access server through the network access server interface, thereby solving the problem that the terminal device cannot access the Internet due to the inconsistency between the network access server interface and the DHCPv6 prefix in the IPv6 network. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. Obviously, the drawings in the following description are merely Some embodiments of the present invention may also be used to obtain other drawings based on these drawings without departing from the skilled artisan.

1 is a flowchart of Embodiment 1 of a network connection processing method for an IPv6 network according to the present invention; FIG. 2 is a flowchart of Embodiment 2 of a network connection processing method for an IPv6 network according to the present invention; FIG. FIG. 4 is a schematic diagram of Embodiment 2 of a network connection processing apparatus for an IPv6 network according to the present invention; FIG. detailed description

The technical solutions in 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 is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a flowchart of Embodiment 1 of a network connection processing method for an IPV6 network according to the present invention. As shown in FIG. 1, the method includes:

Step 101: Receive a packet sent by the terminal device.

Embodiments of the invention may be applied to an IPv6 network.

The terminal device in this embodiment is a terminal device on the LAN side. In an IPv6 network, the LAN side may include a plurality of terminal devices that perform internal communication through a private network address in a LAN, and the terminal devices pass through a home gateway (Home Gateway, the following cartridge is called: HGW) and a wide area network (Wide) Area Network, the following tube is called: WAN) for communication.

The HGW can include multiple NAS interfaces. Before the terminal device sends a packet, the terminal device first receives the DHCPv6 prefix (DHCPv6 Identity Association for Prefix Delegation, the following is called PD) sent by the HGW, and then the terminal device can generate an IPv6 address according to the PD. The PD that the HGW sends to the terminal device is sent to the HGW by the Broadband Remote Access Server (hereinafter referred to as BRAS). Specifically, the HGW sends an application to the BRAS, and the BRAS sends a PD to each NAS interface of the HGW according to the application of the HGW; then the HGW sends the received PD or the received PD to 64 bits, and then sends the PD to the terminal device; When communicating with the WAN side, the terminal device generates an IPv6 address according to the received PD, and then the terminal device performs IPv6 access through the HGW; thus, the HGW receives the packet sent by the terminal device.

Step 102: Obtain a network access server interface corresponding to the DHCPv6 prefix according to the DHCPv6 prefix in the source IPv6 address included in the packet.

After receiving the packet sent by the terminal device, the HGW can obtain the source IPv6 address carried in the packet, and then the HGW selects the source IP address from the plurality of NAS interfaces according to the obtained source IPv6 address. The N AS interface corresponding to the PD.

Step 103: Forward the packet route to the broadband access server through the network access server interface. The HGW forwards the packet to the BRAS through the NAS interface selected in step 102. When the B RAS sends a PD to the N AS interface of the HGW, the BRAS stores the mapping between the N AS interface and the PD. When the BRAS receives the packet forwarded by the HGW, the BRAS checks the PD in the packet and the NAS that forwards the packet. Correspondence of the interface, when the correspondence between the PD and the NAS interface is consistent with the corresponding relationship stored in the BRAS, the BRAS authenticates the packet; if the BRAS finds the correspondence between the received PD and the N AS interface When the relationship between the relationship and the storage is inconsistent, the BR AS considers that the authentication fails and directly discards the message.

With the method provided in this embodiment, when forwarding the packet sent by the terminal device, the HGW selects the NAS interface corresponding to the PD in the packet to forward, and thus, any packet forwarded to the BRAS, where the PD is The correspondence between the N AS interface and the N AS interface that forwards the packet is consistent with the corresponding relationship stored in the B RAS. Therefore, the BRAS does not discard the packet because the PD and the NAS interface do not correspond. The problem that the PD and the N AS interface do not correspond to each other and the terminal device cannot access the Internet.

In the embodiment of the present invention, after receiving the packet sent by the terminal device, the HGW finds the NAS interface corresponding to the PD in the source IPv6 address included in the packet, and then forwards the packet to the BRAS through the NAS interface. This solves the problem that the terminal device cannot access the Internet due to the inconsistency between the NAS interface and the PD in the IPv6 network. 2 is a flowchart of Embodiment 2 of a network connection processing method for an IP v6 network according to the present invention. As shown in FIG. 2, the method includes:

Step 201: Receive a PD sent by the BRAS through the NAS interface, send the received PD to the terminal device, and store maintenance information of the NAS interface. The maintenance information includes the length of the PD and the PD, and the correspondence between the NAS interface and the PD.

The HGW can include multiple NAS interfaces. The following example uses the HGW to include two NAS interfaces as an example. For example: HGW includes NAS interface 1 and NAS interface 2. The NAS interface 1 sends the IPv6 router discovery (Router Advertisement, the tube is called: RA) message through the BRAS or the DHCPv6-IANA (Identity Association for Non-temporary Address, one of the DHCPv6 options for carrying the IPv6 permanent address). The network address, for example, may be: a global unicast IPv6 address (Global-Unicast IPv6 Address, called: GUA), the GUA is used for the HGW's own service; and the NAS interface 1 may also acquire the PD1 from the BRAS. NAS interface 2 can obtain P D2 from B R AS.

The HGW can correspond to multiple terminal devices on the LAN side, and the two terminal devices are the terminal device 1 and the terminal device 2; the terminal device can be, for example, an IP phone, a computer or a set top box. Each terminal in the HGW configuration inherits each PD, for example: In the HGW configuration terminal device 1 inherits PD1, and the configuration terminal device 2 inherits PD2. The specific configuration process may be: If the number of bits of PD1 or PD2 is less than 64 bits, the HGW adds 0 or 1 after PD1 or PD2 to fill the number of bits of PD1 or PD2 to 64 bits, and then the completed PD1 and PD2 are respectively sent to the terminal device 1 and the terminal device 2, and if the number of bits of the PD1 and the PD2 is 64 bits, the PD1 and the PD2 are directly delivered to the terminal device 1 and the terminal device 2, respectively. It should be noted that the embodiment does not limit the manner in which the HGW configures each terminal to inherit each PD. For example, the HGW may configure any one or more terminal devices to inherit PD1, or configure one or more terminal devices to inherit PD2.

After receiving the PD sent by the BRAS, the HGW stores the maintenance information of the NAS interface, and the maintenance information includes: a PD, a length of the PD, and a correspondence between the PD and the NAS interface. For example: HGW can dynamically maintain a PD table, when a NAS interface of the HGW is After the BRAS obtains a PD, the HGW adds a row of maintenance information of the NAS interface to the PD table. The maintenance information may include the identifier of the NAS interface, the PD acquired by the NAS interface, and the length of the PD, that is, the storage NAS. The correspondence between the interface and the PD, and stores the PD.

It should be noted that the HGW sends the PD and the HGW to the terminal device to store the dimension of the NAS interface. Step 202: Receive the packet sent by the terminal device.

After receiving the PD delivered by the HGW, the terminal device can generate a GUA address, that is, an IPv6 address, according to the PD and the interface ID. Then, when the terminal device accesses the Internet, the terminal device sends a packet including the IP v6 address to the HGW. , causing the HGW to receive the packet sent by the terminal device.

After receiving the packet sent by the terminal device, the HGW forwards the packet to the BRAS through an N AS interface. In order to enable the packet to be authenticated after being sent to the BRAS, the HGW selects an N AS interface that is consistent with the P D in the packet to perform route forwarding.

Step 203: Search for a NAS interface corresponding to the PD in the source IPv6 address according to the maintenance information.

The HGW can search for the NAS interface corresponding to the PD in the source IPv6 address of the packet from the multiple NAS interfaces according to the maintenance information. The specific search process can be:

The length of P D in the maintenance information of the N AS interface, and obtain the P D in the source IP address of the source IP address;

The HGW extracts the source IPv6 address from the packet, and performs an AND operation according to the length of the PD in the source IPv6 address and the maintenance information to obtain the PD of the source IPv6 address.

Step 2032: The HGW matches the obtained PD with the PD in the maintenance information to find the NAS interface corresponding to the PD acquired in step 2031.

If the corresponding NAS interface is found, step 2033 is performed. In step S2032, when the HGW matches the PD in the packet obtained in step 2031 with the PD in the maintenance information, the PD in the obtained packet is obtained. When it completely matches the PD in the maintenance information, it is determined in the maintenance information.

The NAS interface is the NAS interface corresponding to the PD. In this case, it is found to correspond to the PD in the packet.

NAS interface; If the PD in the obtained packet does not match the PD in the maintenance information, if it is determined that the corresponding NAS interface is not found, step 2031 is performed. Specifically, if the PD in the packet and the maintenance information are If the PD does not match, the N AS interface in the maintenance information is not the NAS interface corresponding to the PD in the packet, and the step 2031 and the step 2032 are repeated according to the maintenance information of the next NAS interface until the The NAS interface corresponding to the PD in the message;

If the HGW does not find the NAS interface corresponding to the PD in the source IPv6 address (that is, the PD in the packet) in step 2032, go to step 2034; that is, if the HGW does not find any packets in the message according to all the maintenance information. The PD matching NAS interface, step 2034;

Step 2033: Forward the packet route to the BRAS by using the discovered N AS interface.

The HGW forwards the packet to the BRAS through the NAS interface found in step 2032. Since the NAS interface matches the PD in the packet, the packet does not pass the NAS interface and the PD after the packet arrives at the BRAS. Discarded by the BRAS without matching;

Step 2034: The HGW directly discards the packet.

The embodiment may further include the following steps: If a NAS interface is disabled, the maintenance information corresponding to the disabled NAS interface is deleted.

If a NAS interface in the HGW is disabled, the HGW does not maintain the NAS interface, that is, the HGW deletes the maintenance information corresponding to the disabled NAS interface, so that the HGW carries the PD corresponding to the NAS interface. Can be discarded.

The embodiment of the present invention does not limit the timing relationship between the steps of deleting the maintenance information corresponding to the disabled NAS interface and other steps.

It should be noted that, in this embodiment, the NAS1 interface 1 acquires the PD1 and the NAS interface 2 obtains the PD2 as an example. However, the embodiment is not limited thereto, and the embodiment can be applied to other networking modes. For example, the HGW includes the NAS interface 1 and the NAS interface 2, and the NAS interface 1 only obtains the GUA and does not acquire the PD, and the 8.3 interface 2 acquires 0. In this case, the application can avoid the transmission by the N AS interface 1 to the LAN side device. The packet is forwarded by routing.

In the embodiment of the present invention, after receiving the packet sent by the terminal device, the HGW finds the packet in the packet. The NAS interface corresponding to the PD in the source IPv6 address is forwarded to the BRAS through the NAS interface, thereby solving the problem that the terminal device cannot access the Internet due to the inconsistency between the NAS interface and the PD in the IPv6 network.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments. The foregoing storage medium includes: a medium that can store program codes, such as R〇M, RAM, a magnetic disk, or an optical disk.

FIG. 3 is a schematic diagram of Embodiment 1 of a network connection processing apparatus for an IPV6 network according to the present invention. As shown in FIG. 3, the apparatus includes: a receiving module 31, an obtaining module 33, and a routing forwarding module 35. In this embodiment, the device can be a home gateway.

The receiving module 31 is configured to receive a packet sent by the terminal device.

The obtaining module 33 is configured to obtain a network access server interface corresponding to the DHCPv6 prefix according to the DHCPv6 prefix in the source IPv6 address included in the packet received by the receiving module 31.

The routing and forwarding module 35 is configured to forward the packet route to the broadband access server through the network access server interface obtained by the obtaining module 33.

For the working process and working principle of each module in this embodiment, refer to the description in the foregoing method embodiments, and details are not described herein again.

In the embodiment of the present invention, after receiving the packet sent by the terminal device, the HGW finds the NAS interface corresponding to the PD in the source IPv6 address included in the packet, and then forwards the packet to the BRAS through the NAS interface. This solves the problem that the terminal device cannot access the Internet due to the inconsistency between the NAS interface and the PD in the IPv6 network.

4 is a schematic diagram of Embodiment 2 of a network connection processing apparatus for an IP v6 network according to the present invention. On the basis of the embodiment shown in FIG. 3, as shown in FIG. 4, the apparatus further includes: a prefix receiving module and a prefix sending module. The storage module 37, the discarding module 39, and the deleting module 30.

The prefix receiving module (not shown) is configured to receive the DHCPv6 prefix sent by the broadband access server through the network access server interface. The prefix sending module (not shown) is configured to send the DHCPv6 prefix received by the prefix receiving module to the terminal device.

The storage module 37 is configured to store maintenance information of the network access server interface. The maintenance information includes the DHCPv6 prefix, the length of the DHCPv6 prefix, and the mapping between the network access server interface and the DHCPv6 prefix.

The obtaining module 33 is specifically configured to: according to the maintenance information, find a network access server interface corresponding to the DHCPv6 prefix in the source IPv6 address included in the packet received by the receiving module.

The obtaining module 33 may specifically include: a prefix obtaining unit 331 and a searching unit 333.

The prefix obtaining unit 331 is configured to obtain the DHCPv6 prefix in the source IPv6 address according to the source IPv6 address included in the packet received by the receiving module 31 and the length of the DHCPv6 prefix stored in the maintenance information. The locating unit 333 is configured to match the DHCPv6 prefix obtained by the prefix obtaining unit 331 with the DHCPv6 prefix in the maintenance information, and obtain the DHCPv6 prefix and interface with the DHCPv6 pre-access server in the maintenance information.

The process of specifically searching by the prefix obtaining unit 331 and the searching unit 333 may be:

The searching unit 333 is configured to search, according to the maintenance information of the NAS interface, the NAS interface corresponding to the PD acquired by the prefix obtaining unit 331. The searching unit 333 matches the PD acquired by the prefix obtaining unit 331 with the PD in the maintenance information. When the obtained PD completely matches the PD in the maintenance information, the search unit 333 finds the NAS interface corresponding to the PD; when the PD acquired by the prefix obtaining unit 331 does not match the PD in the maintenance information, the prefix obtaining unit The 331 obtains the PD in the source IPv6 address according to the length of the PD in the maintenance information of the next NAS interface, and performs a search by the searching unit 333 until the NAS interface corresponding to the PD in the packet is found.

The discarding module 39 is configured to discard the packet if the obtaining module 33 does not find the network access server interface corresponding to the DHCPv6 prefix in the source IPv6 address according to the maintenance information. The deleting module 30 is configured to delete the maintenance information corresponding to the disabled network access server interface if the network access server interface is disabled.

For the working process and working principle of each module and unit in this embodiment, refer to the description in the foregoing method embodiments, and details are not described herein again.

The embodiment of the invention further provides a home gateway, which comprises any network connection processing device for the I Pv6 network provided by the embodiment of the invention.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

It will be apparent to those skilled in the art that the embodiments of the present invention can be implemented by means of software plus the necessary general hardware platform. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium, such as R〇M/ RAM, diskette, optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the embodiments of the present invention or embodiments. .

The above specific embodiments are not intended to limit the present invention, and any modifications, equivalents, improvements, etc., which are included in the present invention, should be included in the present invention without departing from the principles of the present invention. Within the scope of protection.

Claims

Claim

A network connection processing method for a next generation Internet Protocol IPv6 network, comprising:

Receiving a message sent by the terminal device;

And forwarding the packet route to the broadband access server by using the network access server interface.

The network connection processing method for an IPv6 network according to claim 1, wherein the receiving the packet sent by the terminal device further includes:

Receiving, by the network access server interface, the DHCPv6 prefix sent by the broadband access server;

Sending the DHCPv6 prefix to the terminal device;

The maintenance information of the network access server interface is stored, where the maintenance information includes the DHCPv6 prefix, the length of the DHCPv6 prefix, and the correspondence between the network access server interface and the DHCPv6 prefix.

The network connection processing method for an IPv6 network according to claim 2, wherein the obtaining a DHCPv6 prefix corresponding to the DHCPv6 prefix according to a DHCPv6 prefix in the source IPv6 address included in the message The network access server interface includes:

And searching, according to the maintenance information, a network access server interface corresponding to the DHCPv6 prefix in the source IPv6 address included in the packet.

The network connection processing method for an IPv6 network according to claim 3, wherein the searching according to the maintenance information corresponds to the DHCPv6 prefix in a source IPv6 address included in the packet. The network access server interface includes:

Obtaining a DHCPv6 prefix in the source IPv6 address according to the source IPv6 address included in the packet and the length of the DHCPv6 prefix stored in the maintenance information; And determining, by using the obtained DHCPv6 prefix, the DHCPv6 prefix in the maintenance information, and determining that the DHCPv6 prefix in the maintenance information is the Obtaining the network access server interface corresponding to the DHCPv6 prefix.

The network connection processing method for an IPv6 network according to claim 3 or 4, further comprising:

And if the network access server interface is disabled, deleting the maintenance information corresponding to the disabled network access server interface.

A network connection processing device for an IPv6 network, comprising: a receiving module, configured to receive a packet sent by a terminal device;

An acquiring module, configured to acquire, according to a dynamic host setting protocol DHCPv6 prefix of the IPv6 address in the source IPv6 address that is received by the receiving module, a network access server interface corresponding to the DHCPv6 prefix;

The routing and forwarding module is configured to forward the packet to the broadband access server by using the network access server interface obtained by the acquiring module.

The device for processing a network connection for an IPv6 network according to claim 6, further comprising:

a prefix receiving module, configured to receive, by using the network access server interface, the DHCPv6 prefix sent by the broadband access server;

a prefix sending module, configured to send the DHCPv6 prefix to the terminal device;

And a storage module, configured to store maintenance information of the network access server interface; the maintenance information includes a DHCPv6 prefix, a length of the DHCPv6 prefix, and a correspondence between the network access server interface and the DHCPv6 prefix.

The network connection processing device for an IPv6 network according to claim 7, wherein the acquiring module is specifically configured to: according to the maintenance information, find that the packet received by the receiving module is included in the packet The network access server interface corresponding to the DHCPv6 prefix in the source IPv6 address.

The network connection processing device for an IPv6 network according to claim 8, wherein the obtaining module comprises:

The prefix obtaining unit is configured to obtain a DHCPv6 prefix in the source IPv6 address according to the source IPv6 address included in the packet and the length of the DHCPv6 prefix stored in the maintenance information.

a searching unit, configured to match the obtained DHCPv6 prefix with a DHCPv6 prefix in the maintenance information, and determine, in the maintenance information, that the obtained DHCPv6 prefix matches the DHCPv6 prefix in the maintenance information The DHCPv6 prefix is the network access server interface corresponding to the obtained DHCPv6 prefix.

10. The network connection processing apparatus for an IPv6 network according to claim 8 or 9, wherein the method further comprises:

And a deleting module, configured to delete the maintenance information corresponding to the disabled network access server interface if the network access server interface is disabled.