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WO2012041168A1 - Procédé de traitement pour une connexion à distance destinée à un réseau ipv6 et dispositif associé - Google Patents

Procédé de traitement pour une connexion à distance destinée à un réseau ipv6 et dispositif associé Download PDF

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Publication number
WO2012041168A1
WO2012041168A1 PCT/CN2011/079787 CN2011079787W WO2012041168A1 WO 2012041168 A1 WO2012041168 A1 WO 2012041168A1 CN 2011079787 W CN2011079787 W CN 2011079787W WO 2012041168 A1 WO2012041168 A1 WO 2012041168A1
Authority
WO
WIPO (PCT)
Prior art keywords
access server
network
prefix
dhcpv6 prefix
dhcpv6
Prior art date
Application number
PCT/CN2011/079787
Other languages
English (en)
Chinese (zh)
Inventor
彭朝华
全晓璐
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Publication of WO2012041168A1 publication Critical patent/WO2012041168A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H04L61/5014—Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/659—Internet protocol version 6 [IPv6] addresses

Definitions

  • 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.
  • the network access server Network Access Server, the following cartridge is called: N AS
  • N AS Network Access Server
  • the LAN Local Area Network, the following is called: LAN
  • 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
  • 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;
  • 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.
  • 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.
  • 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.
  • 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;
  • 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;
  • 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;
  • 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.
  • FIG. 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. 4 is a schematic diagram of Embodiment 2 of a network connection processing apparatus for an IPv6 network according to the present invention
  • Embodiment 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.
  • 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.
  • Home Gateway the following cartridge is called: HGW
  • Wide Wide Area Network
  • 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.
  • PD DHCPv6 Identity Association for Prefix Delegation
  • 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).
  • BRAS Broadband Remote Access Server
  • 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;
  • 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.
  • the HGW 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.
  • 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.
  • the BRAS stores the mapping between the N AS interface and the PD.
  • the BRAS receives the packet forwarded by the HGW, the BRAS checks the PD in the packet and the NAS that forwards the packet.
  • 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.
  • the HGW 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 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 HGW after receiving the packet sent by the terminal device, 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.
  • 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.
  • 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.
  • the HGW 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.
  • 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.
  • Step 202 Receive the packet sent by the terminal device.
  • 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.
  • a GUA address that is, an IPv6 address
  • the HGW 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 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.
  • step 2033 is performed.
  • 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.
  • 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;
  • step 2034 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.
  • 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.
  • 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.
  • the NAS1 interface 1 acquires the PD1 and the NAS interface 2 obtains the PD2 as an example.
  • the embodiment is not limited thereto, and the embodiment can be applied to other networking modes.
  • 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.
  • the application can avoid the transmission by the N AS interface 1 to the LAN side device.
  • the packet is forwarded by routing.
  • the HGW after receiving the packet sent by the terminal device, 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.
  • the foregoing storage medium includes: a medium that can store program codes, such as R ⁇ 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.
  • the apparatus includes: a receiving module 31, an obtaining module 33, and a routing forwarding module 35.
  • 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.
  • the HGW after receiving the packet sent by the terminal device, 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.
  • Embodiment 2 is a schematic diagram of Embodiment 2 of a network connection processing apparatus for an IP v6 network according to the present invention.
  • the apparatus further includes: a prefix receiving module and a prefix sending module.
  • 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.
  • 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.
  • the HGW after receiving the packet sent by the terminal device, 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.
  • 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 HGW after receiving the packet sent by the terminal device, 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.
  • 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 ⁇ 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. .
  • a computer device which may be a personal computer, server, or network device, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un procédé de traitement pour une connexion à distance destinée à un réseau IPv6, ainsi qu'un dispositif associé. Ledit procédé comprend : la réception d'un message envoyé par un dispositif terminal ; l'acquisition d'une interface de serveur d'accès à distance correspondant à un préfixe DHCPv6 du protocole DHCP conforme au préfixe DHCPv6 de l'IPv6 dans l'adresse IPv6 d'origine incluse dans le message ; et l'acheminement ainsi que la transmission du message à un serveur d'accès à large bande par le biais de ladite interface de serveur d'accès à distance. Dans les modes de réalisation de la présente invention, après la réception d'un message envoyé par un dispositif terminal, une interface de serveur d'accès à distance correspondant au préfixe dans l'adresse IPv6 d'origine incluse dans le message est trouvée, puis le message est acheminé et transmis à un serveur d'accès à large bande par le biais de l'interface de serveur d'accès à distance, et le dispositif terminal n'est donc plus dans l'impossibilité d'accéder au réseau.
PCT/CN2011/079787 2010-09-29 2011-09-17 Procédé de traitement pour une connexion à distance destinée à un réseau ipv6 et dispositif associé WO2012041168A1 (fr)

Applications Claiming Priority (2)

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CN201010500256.0 2010-09-29
CN2010105002560A CN102143050A (zh) 2010-09-29 2010-09-29 用于IPv6网络的网络连接处理方法及其装置

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