WO2010057386A1 - Procédé, système et dispositif de réacheminement de paquets de données - Google Patents

Procédé, système et dispositif de réacheminement de paquets de données Download PDF

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Publication number
WO2010057386A1
WO2010057386A1 PCT/CN2009/072671 CN2009072671W WO2010057386A1 WO 2010057386 A1 WO2010057386 A1 WO 2010057386A1 CN 2009072671 W CN2009072671 W CN 2009072671W WO 2010057386 A1 WO2010057386 A1 WO 2010057386A1
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WO
WIPO (PCT)
Prior art keywords
ipv4
packet
ipv6
data packet
network
Prior art date
Application number
PCT/CN2009/072671
Other languages
English (en)
Chinese (zh)
Inventor
蒋胜
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP09827135.6A priority Critical patent/EP2360879B1/fr
Priority to ES09827135.6T priority patent/ES2569392T3/es
Publication of WO2010057386A1 publication Critical patent/WO2010057386A1/fr
Priority to US13/111,662 priority patent/US8223780B2/en
Priority to US13/247,619 priority patent/US8238336B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H04L45/745—Address table lookup; Address filtering
    • H04L45/748—Address table lookup; Address filtering using longest matching prefix
    • 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
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2514—Translation of Internet protocol [IP] addresses between local and global IP addresses
    • 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
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2592—Translation of Internet protocol [IP] addresses using tunnelling or encapsulation
    • 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
    • H04L2101/677—Multiple interfaces, e.g. multihomed nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2212/00—Encapsulation of packets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H04L45/306—Route determination based on the nature of the carried application

Definitions

  • the present invention relates to network communication technologies, and in particular, to a data packet forwarding method, system, and device.
  • IPv4 IPv4
  • IPv4 addresses including: private IP address space; dynamic IP address allocation; variable-length subnet mask; classless inter-domain routing (Classless)
  • IPv6 IPv6
  • the inventor found in the process of implementing the present invention that since the transition from IPv4 to IPv6 involves a large number of upgrades and changes of the host system and the routing system, it is impossible to complete in a short time, ⁇ and ⁇ It will coexist for a long time. Therefore, how to use the existing IPv4 network to gradually deploy IPv6 networks incrementally, and realize communication is the focus of the industry.
  • the embodiment of the present invention provides a data packet forwarding method, a communication system, a CGN device, and an access gateway, which solves the technical problem of fully utilizing an IPv4 network and gradually deploying an IPv6 network to implement communication.
  • an embodiment of the present invention provides a data packet forwarding method, including: The carrier-level network address translation CGN device receives the first data packet forwarded by the access gateway;
  • the first data packet is an IPv4 packet or an IPv6- OV er-IP V 4 tunnel packet
  • the first data packet is an IPv4 packet, forwarding the first data packet to an IPv4 network; when the first data packet is an IPv6- OV er-IP V4 tunnel message, the CGN device pair
  • the first data packet is de-IPv4 encapsulated to obtain a first IPv6 packet, and the first IPv6 packet is sent to an IPv6 network or an IPv4 network.
  • the access gateway receives the first data packet sent by the client, and determines that the first data is an IPv4 packet or a first IPv6 packet.
  • the first data packet is an IPv4 packet
  • the IPv6 packet is encapsulated by the IPv6-over-IPv4 tunnel through the IPv6-over-IPv4 tunnel. Give the CGN device.
  • the carrier-level network address translation CGN device communicates with the access gateway through the IPv4 network, and is configured to receive the first data packet forwarded by the access gateway, and determine that the first data packet is an IPv4 packet or an IPv6-o Ver- I Pv4 tunnel message; when the first data packet is an IPv4 packet, forwarding the first data packet to an IPv4 network; when the first data packet is an IPv6- OV er-IP V 4 tunnel message
  • the CGN device performs IPv4 encapsulation on the first data packet to obtain a first IPv6 packet, and sends the first IPv6 packet to an IPv6 network or an IPv4 network.
  • a receiving module configured to receive a first data packet forwarded by the access gateway
  • a judging module configured to determine that the first data packet is an IPv4 packet or an IPv6-OVer- IPv4 tunnel packet first communication module, where the determining module determines that the first data packet is an IPv4 packet, Forwarding the first data packet to an IPv4 network;
  • a second communication module configured to: when the determining module determines that the first data packet is an IPv6- OVer-IPv4 tunnel report The packet is de-IPv4 encapsulated to obtain the first IPv6 packet, and the first IPv6 packet is sent to the IPv6 network or the IPv4 network.
  • a receiving unit configured to receive a first data packet sent by the client
  • a judging unit configured to determine that the first data packet received by the receiving unit is an IPv4 packet or a first IP v6 packet;
  • a first communication unit configured to: when the determining unit determines that the first data packet is an IPv4 packet, forward the first data packet to the CGN device;
  • the second communication unit is configured to: when the determining unit determines that the first data packet is the first IPv6 packet, perform IPv4 encapsulation on the IPv6 packet, and obtain the IPv6- OV er obtained by using the IPv4 encapsulation.
  • the IP V 4 tunnel message is sent to the CGN device through the IPv6-over-IPv4 tunnel.
  • IPv6 network By implementing a packet forwarding method, a communication system, a CGN device, and an access gateway of the present invention, the existing IPv4 network and its equipment can be fully utilized in the realization of network communication, and the incremental deployment can be gradually implemented. IPv6 network. It effectively improves resource utilization, reduces networking costs, and facilitates smooth transition of communication technologies.
  • FIG. 1 is a flowchart of an access gateway performing data packet forwarding according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a packet forwarding process performed by a CGN device according to an embodiment of the present invention
  • FIG. 3 is a flowchart of forwarding IPv4 traffic according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of a communication system according to an embodiment of the present invention.
  • FIG. 6 is a first embodiment of the CGN device of FIG. 5;
  • Figure 7 is a block diagram showing the structure of the first communication module shown in Figure 6;
  • FIG. 8 is a second embodiment of the CGN device of FIG. 5;
  • FIG. 9 is a first embodiment of the access gateway shown in FIG. 5;
  • Figure 10 is a block diagram showing the structure of the first communication unit shown in Figure 9;
  • FIG. 11 is a second embodiment of the access gateway shown in FIG. 5;
  • Figure 12 is a first preferred embodiment of the present invention
  • Figure 13 is a second preferred embodiment of the present invention.
  • carrier-class network address translation (Carrier Grade) is deployed in the network.
  • NAT, CGN access gateway
  • the access gateway integrates IPv4 forwarding and IPv6-ove r-IPv4 tunneling, optionally further integrating IPv4-IPv4
  • NAT function optionally further integrated with NAT-PT (protocol
  • a data packet forwarding method including:
  • the access gateway receives the first data packet sent by the client
  • the processing is as shown in FIG. 2, and includes:
  • the CGN device receives a first data packet forwarded by an access gateway
  • [54] S200 determining, according to the data packet header information, that the first data packet is an IPv4 packet or an IPv6- OV er-IP V4 tunnel packet, specifically, when the first data packet has two or two layers
  • the above packet header, and the outer packet header protocol number is IPv4
  • the first data packet is an IPv6- OV er-IP V 4 tunnel packet.
  • the A data packet is an IPv4 packet;
  • the forwarding of data packets sent by the IPv4 client or the dual-stack client through the IPv4 protocol includes:
  • the CGN device receives the first data packet that is forwarded by the access gateway and carries the IPv4 address of the first layer private network;
  • the CGN device replaces the first layer private network IPv4 address by using the public network IPv4 address, and records the first mapping relationship information between the public network IPv4 address and the first layer private network IPv4 address, and replaces The first data packet carrying the public network IPv4 address is forwarded to the IPv4 network, where the first mapping relationship information includes: a correspondence between the public network IPv4 address and the first layer private network IPv4 address, and/or a public network IPv4 address and Correspondence between the IPv4 address of the first layer private network and the port number of the first layer private network.
  • the method further includes: before the sl1, when the IPv4 client does not have a public network IPv4 address, the method further includes: sending, by the access gateway, the IPv4 client or the dual-stack client The second layer private network IPv4 address of the data packet is replaced with the first layer private network IPv4 address, and the second mapping relationship information between the second layer IPv4 address and the first layer private network IPv4 address is recorded, and the address is replaced.
  • the first data packet carrying the first layer private network IPv4 address is forwarded to the CGN device, where the second mapping relationship information includes: a correspondence between the second layer private network IPv4 address and the first layer private network IPv4 address And/or the correspondence between the IPv4 address of the first layer private network and the IPv4 address of the second layer private network and the port number of the second layer private network.
  • the method further includes: when the CGN device receives the second data packet that is sent by the IPv4 network and carries the public network IP v4 address, the method further includes:
  • the CGN device After the CGN device replaces the public network IPv4 address of the second data packet with the IPv4 address of the first layer private network according to the first mapping relationship information, the CGN device carries the first layer private network IPv4. The second data packet of the address is forwarded to the access gateway.
  • the access gateway receives the second data packet that is forwarded by the CGN device and carries the IPv4 address of the first layer private network, and the first layer private network is configured according to the second mapping relationship information.
  • the IPv4 address is translated into the second layer private network IPv4 address, and the address converted second packet carrying the second layer private network IPv4 address is forwarded to the IPv4 client or the dual stack client.
  • the IPv6 client or the dual-stack client is sent through the IPv6 protocol.
  • Packet forwarding includes:
  • the CGN device receives the first data packet forwarded by the access gateway through the IPv6-over-IPv4 tunnel;
  • the CGN device performs IPv4 encapsulation on the first data packet, obtains a first IPv6 packet, and records the IPv6- OV er-IP V4 tunnel information, where the IPv6- OV er-
  • the IP V 4 tunnel information includes: a tunnel number, a private network IPv4 address at the start of the tunnel, and an IPv6 address corresponding to the tunnel;
  • the CGN device sends the first IPv6 packet to an IPv6 network or an IPv4 network.
  • the access gateway performs IPv4 encapsulation on the first IPv6 packet sent by the IPv6 client or the dual-stack client, and passes the first data packet obtained through the IPv4 encapsulation to the IPv6- OV er-IP V. 4 The tunnel is sent to the C GN device.
  • sending the first IPv6 packet to the IPv4 network specifically includes:
  • the CGN device performs NAT-PT processing on the first IPv6 packet to obtain an IPv4 packet, and records the NAT-
  • the NAT-PT processing includes: replacing an IPv6 address in the first data packet by using a public network IPv4 address
  • the AT-PT mapping information is subjected to NAT-PT processing on the second data packet to obtain a second IPv6 packet.
  • the IPv6 address is replaced by the IPv6 address to obtain the second IPv6 packet.
  • the method further includes: [75] The CGN device performs IPv4 encapsulation on the second IPv6 packet according to the recorded IPv6- OV er-IP V 4 tunnel information to obtain a second data packet, and passes the IPv6- OV er - An IP V 4 tunnel is sent to the access gateway.
  • the access gateway receives the second data packet sent by the CGN through the IPv6- OV er-IP V 4 tunnel, and performs IPv4 encapsulation on the second data packet to obtain the foregoing
  • the second IPv6 packet is sent to the client by the IPv6 packet.
  • the access gateway has a first layer private network IPv4
  • the data packet of the address is directly forwarded to the CGN device, and the data packet with the IPv4 address of the second layer private network is first converted into the first layer private IPv4 address, and then sent to the CGN.
  • the device, and the CGN device converts the first layer private network IPv4 address into a public network IPv4 address, and then forwards it to the corresponding IPv4 network, and for the IPv6 data packet, the access gateway performs IPv4 encapsulation on the IPv6 data packet, via IPv6- o
  • the Ver- IPv4 tunnel is sent to the CGN device.
  • the CGN device decapsulates the IPv6 packet and sends it to the corresponding IPv6 network. This makes full use of the existing IPv4 network and its devices. It effectively improves resource utilization, reduces networking costs, and facilitates a smooth transition of communication technologies.
  • a communication system implemented by the present invention includes:
  • the CGN device 5200 is configured to communicate with the access gateway 5100 through the IPv4 network, and configured to receive the first data packet forwarded by the access gateway 5100, and determine that the first data packet is an IPv4 packet or an IPv6- OVer-IPv4 a tunnel message; when the first data packet is an IPv4 packet, forwarding the first data packet to an IPv4 network; when the first data packet is an IPv6- OV er-IP V4 tunnel message, The CGN device 5200 performs IPv4 encapsulation on the first data packet to obtain a first IPv6 packet, and sends the first IPv6 packet to an IPv6 network or an IPv4 network.
  • the access gateway 5100 is configured to receive a first data packet sent by the client (the IPv4 client or the dual-stack client), and determine that the first data packet is an IPv4 packet or a first IPv6 packet. And when the first data packet is an IPv4 packet, forwarding the first data packet to the CGN device; and when the first data packet is a first IPv6 packet, performing IPv4 on the IPv6 packet Encapsulating, the IPv6-ov er-IPv4 tunnel packet obtained by the IPv4 encapsulation is sent to the CGN device through the IPv6-over-IPv4 tunnel.
  • the CGN device 5200 is further configured to receive the second data packet sent by the IPv4 network, and forward the second data packet to the access gateway 5100; or send the IPv6 network to send
  • the second IPv6 packet is encapsulated by the IPv4 packet to obtain the second data packet, and is sent to the access gateway 5100 by using the IP v6-over-IPv4 tunnel.
  • the access gateway 5100 forwards the second data packet forwarded by the CGN device 5200 to the IPv4 client; or the second data packet sent by the CGN device 5200 through the IPv6- OV er-IP V 4 tunnel
  • the second IPv6 packet is obtained by decapsulating the second IPv6 packet, and the second IPv6 packet is sent to the dual stack client.
  • the CGN device includes: [83] The receiving module 5201 is configured to receive a first data packet forwarded by the access gateway;
  • the determining module 5202 is configured to determine that the first data packet is an IPv4 packet or an IPv6- OV er-IP V 4 tunnel packet;
  • the first communication module 5203 is configured to: when the determining module 5202 determines that the first data packet is an IPv4 packet,
  • the second communication module 5204 is configured to: when the determining module 5202 determines that the first data packet is an IPv6- OV er-IP v4 tunnel message, performing IPv4 encapsulation on the first data packet, to obtain a An IPv6 packet, the first IPv6 packet is sent to an IPv6 network or an IPv4 network.
  • the first communication module 5203 includes:
  • the IPv4 address translation module 52031 is configured to replace the first layer private network IPv4 address carried by the first data packet with a public network IPv4 address;
  • the sending module 52032 is configured to forward, by using the IPv4 address translation module 52031, the first data packet carrying the public network IPv4 address to the IPv4 network.
  • the CGN device further includes: in addition to the structure described in FIG.
  • the third communication module 5205 is configured to receive the second data packet sent by the IPv4 network, and replace the public network IPv4 address carried by the second data packet with the first layer private network IPv4 address. And forwarding to the access gateway;
  • the fourth communication module 5206 is configured to receive the second IPv6 packet sent by the IPv6 network, and perform IPv4 encapsulation on the second IPv6 packet according to the recorded IPv6- OV er-IP V4 tunnel information. A second data packet is obtained and sent to the access gateway through the IPv6- OV er-IP V 4 tunnel.
  • the CGN device further includes: a protocol conversion module 5207, configured to perform NAT-PT processing on the first IPv6 packet processed by the decapsulation module in the second communication module 5203 to obtain an IPv4 report. And sending the IPv4 packet to the IPv4 network, or performing NAT-PT processing on the second data packet sent by the IPv4 network received by the third communication module 5205 to obtain an IPv6 packet, and using the IPv6 packet The message is sent to the fourth communication module 5206 for processing.
  • a protocol conversion module 5207 configured to perform NAT-PT processing on the first IPv6 packet processed by the decapsulation module in the second communication module 5203 to obtain an IPv4 report. And sending the IPv4 packet to the IPv4 network, or performing NAT-PT processing on the second data packet sent by the IPv4 network received by the third communication module 5205 to obtain an IPv6 packet, and using the IPv6 packet The message is sent to the fourth communication module 5206 for processing.
  • the access gateway includes:
  • receiving unit 8100 configured to receive a first data packet sent by the client;
  • the determining unit 8200 is configured to determine that the first data packet received by the receiving unit 8100 is an IPv4 packet or a first IPv6 packet.
  • the first communication unit 8300 is configured to: when the determining unit 8200 determines that the first data packet is an IPv4 packet, forwarding the first data packet to the CGN device;
  • the second communication unit 8400 is configured to: when the determining unit 8200 determines that the first data packet is the first IPv6 packet,
  • the first communication unit 8300 includes:
  • the IPv4 address translation unit 8301 is configured to replace the second layer private network IPv4 address of the first data packet with the first layer private network IPv4 address;
  • the sending unit 8302 is configured to send, by the IPv4 address translation unit 8301, the first data packet carrying the first layer private network IPv4 address to the CGN device.
  • the access gateway further includes: [103] a third communication unit 8500, configured to forward the CGN device to the second The first layer private network IPv4 address carried in the data packet is replaced with the second layer private network IPv4 address, and forwarded to the client;
  • the fourth communication unit 8600 is configured to perform IPv4 encapsulation on the second data packet sent by the CGN device by using the IPv6-over-IPv4 tunnel to obtain the second IPv6 packet, and the second An IPv6 packet is sent to the dual stack client.
  • an access gateway directly forwards a data packet having a first layer private network IPv4 address to a CGN device, and a data packet having a second layer private network IPv4 address first The address is translated to the first layer private network IPv4 address and then sent to the CGN
  • the device, and the CGN device converts the first layer private network IPv4 address into a public network IPv4 address, and then forwards it to the corresponding IPv4 network, and for the IPv6 data packet, the access gateway performs IPv4 encapsulation on the IPv6 data packet, via IPv6- o
  • the Ver- IPv4 tunnel is sent to the CGN device, and the CGN device decapsulates the IPv6 packet, and then sends it to the corresponding IPv6 network.
  • Method 1 The IPv4-IPv4 forwarding function and the IPv6-over-IPv4 tunnel function are integrated on the access gateway, and the CGN device integrates the IPv4-IPv4 conversion function and the IPv6-o Ver -IPv4 tunnel function.
  • the IPv4 client and the dual-stack client respectively communicate with the access gateway, and the access gateway communicates with the CGN device through the IPv4 protocol, and the CGN device connects to the IPv6 network and the IPv4 network.
  • the access gateway applies for multiple private network IPv4 addresses (that is, the first layer private network address in the embodiment of the present invention) to the CGN device, where 10.1.0.1, 10.1.0.2 are respectively allocated to the IPv4 client and the dual stack.
  • the LAN interface address of the access gateway is 10.0.0.2, the WAN interface address is 10.0.0.1, and the private network IPv4 address of the C GN device is 10.0.0.0, and the IPv4 public network address is 193.0.0.2.
  • the CGN device distributes the private network IPv6 address with the prefix 2001:0:0:100/56 to the access gateway, and the inbound interface of the access gateway and the IPv6 port of the dual-stack client use the address in the address segment.
  • the IPv6 address of the CGN device is 2001:0:0:0::1.
  • IPv4 traffic (or message or packet) on an IPv4 port of an IPv4 client or dual-stack client
  • the IPv4 client After the access gateway is reached, the IPv4 client carries the source address of 10.1.0.1 as an example, and the access gateway forwards the packet directly to the C GN device. After the traffic of the IPv6 port of the dual-stack client reaches the access gateway, the access gateway The IPv6 traffic needs to be encapsulated in IPv4 and then sent to the CGN device through the IPv6-over-IPv4 tunnel.
  • the CGN device determines whether the traffic is transmitted by the IPv4 traffic or the IPv6- OV er-IP V 4 tunnel after receiving the traffic, and performs IPv4-IPv4 address translation for the IPv4 traffic, and replaces the first with the public network address 193.0.0.2. Layer private network address 10.1.0.1, and then forwarded to the IPv4 network; IPv6-over-IPv4 tunnel traffic is de-IPv4 encapsulated to obtain IPv6 traffic, forwarded directly to the IPv6 network, and recorded IPv6- OV er-IP V 4 tunnel Tunnel information, such as the tunnel number and the private network IPv4 address at the beginning of the tunnel (for example, 10.0.0.1)
  • the CGN device and the access gateway are processed. The above is similar and will not be mentioned here.
  • Method 2 Integrate IPv4-IPv4 address translation function and IPv6-over-IPv4 tunnel function on the access gateway, C-GN device integrates IPv4-IPv4 address translation function and IPv6-over-IPv4 tunnel function, access gateway and CGN The device communicates through the IPv4 protocol.
  • the gateway (home gateway) performs IPv4-IPv4 address translation, and translates between the private network address of the second layer and the private network address of the first layer delivered by the CGN.
  • the CGN device runs DHCP.
  • V4 (or manually) distributes the private network IPv4 address (the first layer private network IPv4 address) to the access gateway, such as 10.0.0. 1 (used by the WAN interface).
  • the CGN itself also uses the private network IPv4 address 10.0.0.0.
  • the access gateway can run DHCP
  • the distributed address belongs to a separate v4 private address space (the second layer private network IPv4 address).
  • the access gateway uses 192.168.0.0 for the internal interface (LAN interface).
  • the IPv4 client uses 192.168.0.1 and the dual-stack client IPv4 port uses 192.168.0.2.
  • the IPv4 traffic sent from the client converts the second layer private network address 192.168.0.1 into the first layer private network address 10.0.0.1 and forwards it to the CGN device via the access gateway; the CGN device uses the IPv4 public network address again, such as 193.0.0.2, after forwarding 10.0.0.1, forwarded to the IPv4 network.
  • the reverse IPv4 traffic is converted to the access gateway through the CGN device and then transmitted to the access gateway.
  • the access gateway performs the corresponding conversion, and converts the IPv4 address of the first layer private network to the IPv4 address of the second layer private network.
  • the handling of IPv6 traffic is similar to that of the method, and is not mentioned here.
  • IPv6-IPv4 NAT-P T protocol translation
  • an access gateway directly forwards a data packet having a first layer private network IPv4 address to a CGN device, and has a second layer private
  • the data packet of the network IP v4 address first converts the address into the first layer private network IPv4 address, and then sends it to the CGN device, and the CGN device converts the first layer private network IPv4 address into the public network IPv4 address, and then forwards it to the corresponding The IPv4 network, and for the IPv6 data packet, the access gateway performs IPv4 encapsulation on the IPv6 data packet, and sends the IPv6 packet to the CGN device through the IPv6-o Ver- IPv4 tunnel, and the IPv6 packet is decapsulated by the CGN device, and then sent to the corresponding
  • the IPv6 network makes full use of the existing IPv4 network and its devices, and the IPv6 network can be incrementally deployed. It effectively improves resource

Abstract

L'invention porte sur un procédé de réacheminement de paquets de données, sur un système de communication et sur un dispositif de traduction d'adresse réseau de classe transporteur (CGN), ainsi que sur une passerelle d'accès. Le dispositif CGN (1), qui communique avec une passerelle d'accès (7) par l'intermédiaire d'un réseau IPv4, est utilisé pour recevoir un premier paquet de données réacheminé par la passerelle d'accès (7) et pour déterminer si le premier paquet de données est un message IPv4 ou un message de tunnel IPv6-sur-IPv4; le premier paquet de données est réacheminé dans le réseau IPv4 si le premier paquet de données est un message IPv4; le dispositif CGN (1) désencapsule le premier paquet de données si le premier paquet de données est un message de tunnel IPv6-sur-IPv4 afin d'obtenir le premier message IPv6 et réachemine le premier message IPv6 vers le réseau IPv6 ou vers le réseau IPv4. La mise en œuvre des modes de réalisation de la présente invention résout les problèmes techniques d'utilisation complète de réseau IPv4,  d'attribution progressive et incrémentale de réseau IPv6 et d’exécution de communication.
PCT/CN2009/072671 2008-11-20 2009-07-07 Procédé, système et dispositif de réacheminement de paquets de données WO2010057386A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP09827135.6A EP2360879B1 (fr) 2008-11-20 2009-07-07 Procédé, système et dispositif de réacheminement de paquets de données
ES09827135.6T ES2569392T3 (es) 2008-11-20 2009-07-07 Método, sistema y dispositivo de reenvío de paquetes de datos
US13/111,662 US8223780B2 (en) 2008-11-20 2011-05-19 Method for forwarding data packet, system, and device
US13/247,619 US8238336B2 (en) 2008-11-20 2011-09-28 Method for forwarding data packet, system, and device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200810219260.2 2008-11-20
CN2008102192602A CN101447935B (zh) 2008-11-20 2008-11-20 数据包转发方法、系统及设备

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Application Number Title Priority Date Filing Date
US13/111,662 Continuation US8223780B2 (en) 2008-11-20 2011-05-19 Method for forwarding data packet, system, and device

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WO2010057386A1 true WO2010057386A1 (fr) 2010-05-27

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EP2360879A1 (fr) 2011-08-24
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US8223780B2 (en) 2012-07-17
CN101447935A (zh) 2009-06-03
ES2569392T3 (es) 2016-05-10
US20110222543A1 (en) 2011-09-15
US8238336B2 (en) 2012-08-07
CN101447935B (zh) 2011-12-21

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