WO2021093641A1 - 报文传输方法及系统,发送端vpn设备及gre拼接设备 - Google Patents
报文传输方法及系统,发送端vpn设备及gre拼接设备 Download PDFInfo
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- WO2021093641A1 WO2021093641A1 PCT/CN2020/126191 CN2020126191W WO2021093641A1 WO 2021093641 A1 WO2021093641 A1 WO 2021093641A1 CN 2020126191 W CN2020126191 W CN 2020126191W WO 2021093641 A1 WO2021093641 A1 WO 2021093641A1
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005538 encapsulation Methods 0.000 claims abstract description 30
- 238000004590 computer program Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
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- 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
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- 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
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- 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
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- 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
- H04L45/24—Multipath
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- 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
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- 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
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
Definitions
- the present disclosure relates to the field of data network communication, and in particular to a method, device, system and storage medium for message transmission.
- VPN technology includes traditional MPLS-based L2VPN technology and L3VPN technology, as well as EVPN technology.
- the outer layer tunnel and inner layer VPN label required by the VPN can be formed by MPLS, which can be implemented based on LDP, MP-BGP and other protocols.
- MPLS can be implemented based on LDP, MP-BGP and other protocols.
- GRE can be selected to form the outer tunnel required by the VPN.
- the inner VPN label is still passed by the VPN nodes supporting MPLS at both ends. Agreement to form.
- the intermediate network is complicated or there are specific networking requirements, it will be necessary to connect the VPN nodes at both ends through multi-segment GRE splicing to form the required outer tunnel.
- the data packet is forwarded to the splicing node of the multi-segment GRE.
- the GRE header of the previous segment is decapsulated, only the internal VPN label and payload are left.
- the node cannot obtain the forwarding information to the remote VPN node, and therefore cannot determine which GRE header on the encapsulation will forward the message to the next splicing node, and can only discard the message.
- the present disclosure provides a message transmission method and system, a VPN device at the sending end and a GRE splicing device, and solves the problem that the splicing node cannot forward the message to the destination VPN node in the GRE splicing scenario in the related art.
- a message transmission method is provided, which is suitable for the splicing of multi-segment general routing encapsulation GRE tunnels in the transmission path, and the two ends of the transmission path are VPN nodes.
- the method includes: determining that there are multiple segments in the transmission path In the case of a GRE tunnel, the VPN device at the sending end sends a first GRE message encapsulated with a destination IP address, and the destination IP address is the address of the VPN device at the receiving end.
- a message transmission method is provided, which is suitable for GRE tunnel splicing with multiple general routing encapsulation in a transmission path, both ends of the transmission path are VPN nodes, and at least one GRE splicing node exists in the transmission path ,
- the method includes: when the GRE splicing node receives the first GRE packet, obtains the destination IP address; according to the type of the next GRE tunnel, the second GRE packet is formed after GRE encapsulation for transmission, wherein The GRE packet is sent by the VPN device at the sending end, and the first GRE packet includes the destination IP address.
- a VPN device at the sender is provided, which is suitable for scenarios where there are multiple segments of general route encapsulation GRE tunnel splicing in a message transmission path.
- the receiver of the transmission path is a VPN device
- the VPN device at the sender includes :
- the sending module is used to send the first GRE message encapsulated with a destination IP address when it is determined that there are multiple GRE tunnels in the transmission path, and the destination IP address is the address of the VPN device at the receiving end.
- a GRE splicing device which is suitable for splicing scenarios where there are multiple segments of general route encapsulation GRE tunnel splicing in a message transmission path.
- Both ends of the transmission path are VPN devices, and at least one of the transmission paths is GRE splicing equipment, the GRE splicing equipment includes: an acquisition module, used to obtain the destination IP address in the case of receiving the first GRE message; a transmission module, used to form the first GRE tunnel after GRE encapsulation according to the type of the next GRE tunnel
- the second GRE message is transmitted, where the first GRE message is sent by the VPN device at the sending end, and the first GRE message includes the destination IP address.
- a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, any one of the foregoing message transmission methods is implemented.
- a message transmission system is provided, which is suitable for scenarios where there are multiple segments of universal routing encapsulation GRE tunnel splicing in a transmission path, the two ends of the transmission path are VPN devices, and there is at least one GRE in the transmission path.
- a splicing device is provided.
- the system includes: a VPN device at the sending end, which is used to send a first GRE message encapsulated with a destination IP address when it is determined that there are multiple GRE tunnels in the transmission path, and the destination IP address is the VPN device at the receiving end Address; the GRE splicing device is used to obtain the destination IP address when receiving the first GRE message, and form a second GRE message for transmission after GRE encapsulation according to the type of the next GRE tunnel.
- Fig. 1 is a flowchart of a message transmission method according to the first embodiment of the present disclosure
- Fig. 2 is a flowchart of a message transmission method according to the second embodiment of the present disclosure
- Fig. 3 is a structural block diagram of a VPN device at the sending end according to an embodiment of the present disclosure
- Fig. 4 is a structural block diagram of a GRE splicing device according to an embodiment of the present disclosure
- Fig. 5 is a structural block diagram of a message transmission system according to an embodiment of the present disclosure.
- Fig. 6 is a flowchart of a message transmission method according to a preferred embodiment of the present disclosure.
- FIG. 1 is a flowchart of the message transmission method according to the first embodiment of the present disclosure. As shown in FIG. 1, it is suitable for the existence of multiple general routing encapsulation GRE tunnels in the transmission path. For splicing, the two ends of the transmission path are VPN nodes, and the method includes the following steps.
- Step S102 In the case where it is determined that there are multiple GRE tunnels in the transmission path, the VPN device at the sending end sends a first GRE message encapsulated with a destination IP address, where the destination IP address is the address of the VPN device at the receiving end.
- the message transmission method before the VPN device at the sending end sends the first GRE message encapsulated with the destination IP address, the message transmission method further includes: determining that the outer tunnel exit corresponding to the VPN device at the receiving end is GRE In this case, the VPN device at the sending end creates an IP tunnel, where the IP tunnel header includes the destination IP address, and the IP tunnel header is encapsulated in the GRE message.
- the destination IP address is used as the information of the new IP tunnel header to be encapsulated inside the real outer tunnel exit GRE header on the VPN node to form a nested format of outer GRE header plus inner IP tunnel header.
- Inside the IP tunnel header is the VPN label and payload.
- the IP tunnel header also includes a VPN label and payload.
- the IP tunnel includes a GRE tunnel, an IPsec tunnel, or a Vxlan tunnel.
- the message transmission method further includes: in the case that there is a GRE splicing node in the transmission path, the GRE splicing node When the first GRE message is received, the destination IP address is obtained, and GRE encapsulation is performed according to the type of the next GRE tunnel to form a second GRE message for transmission.
- Fig. 2 is a flowchart of a message transmission method according to the second embodiment of the present disclosure. As shown in Fig. 2, it is suitable for the splicing of multi-segment general routing encapsulation GRE tunnels in the transmission path. Both ends of the transmission path are VPN nodes. There is at least one GRE splicing node in the path, and the method includes the following steps.
- step S202 the GRE splicing node obtains the destination IP address when receiving the first GRE message.
- Step S204 Perform GRE encapsulation according to the type of the next GRE tunnel to form a second GRE message for transmission, where the first GRE message is sent by the VPN device at the sending end, and the first GRE message includes the destination IP address.
- Fig. 3 is a structural block diagram of a VPN device at the sending end according to an embodiment of the present disclosure. As shown in Fig. 3, it is suitable for a scenario where there are multiple segments of general routing encapsulation GRE tunnel splicing in the message transmission path, and the receiving end of the transmission path is the VPN device ,
- the VPN device at the sending end includes the following modules.
- the sending module 32 is configured to send a first GRE message encapsulated with a destination IP address when it is determined that there are multiple GRE tunnels in the transmission path, where the destination IP address is the address of the VPN device at the receiving end.
- Fig. 4 is a structural block diagram of a GRE splicing device according to an embodiment of the present disclosure. As shown in Fig. 4, it is applicable to a scenario where there are multiple segments of general routing encapsulation GRE tunnel splicing in a message transmission path, and both ends of the transmission path are VPN devices. There is at least one GRE splicing device in the transmission path, and the GRE splicing device includes the following modules.
- the obtaining module 42 is configured to obtain the destination IP address when the first GRE message is received.
- the transmission module 44 is configured to perform GRE encapsulation according to the type of the next GRE tunnel to form a second GRE message for transmission, where the first GRE message is sent by the VPN device at the sending end, and the first GRE message includes the purpose IP address.
- the embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, any one of the foregoing message transmission methods is implemented.
- the embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, wherein the computer program is executed by a processor to implement the steps of any of the foregoing message transmission methods.
- Fig. 5 is a structural block diagram of a message transmission system according to an embodiment of the present disclosure. As shown in Fig. 5, it is applicable to a scenario where there are multiple sections of general routing encapsulation GRE tunnel splicing in the transmission path. Both ends of the transmission path are VPN devices. There is at least one GRE splicing device in the transmission path: the message transmission system includes the following devices.
- the VPN device 52 at the sending end is configured to send a first GRE message encapsulated with a destination IP address when it is determined that there are multiple GRE tunnels in the transmission path, where the destination IP address is the address of the VPN device at the receiving end.
- the GRE splicing device 54 is configured to obtain the destination IP address when the first GRE packet is received, and form a second GRE packet for transmission after performing GRE encapsulation according to the type of the next GRE tunnel.
- Fig. 6 is a flowchart of a message transmission method according to a preferred embodiment of the present disclosure. As shown in Fig. 6, the method includes the following steps.
- step S602 when the VPN nodes PE1 and PE2 at both ends form inner VPN labels through related protocols, the address information of the opposite ends is obtained to establish a protocol connection.
- Step S604 It is detected that multiple GRE tunnels are spliced in the path (PE1-P1-P2-PE2) for establishing the protocol address at the opposite end.
- Step S606 Establish a protocol address according to the opposite VPN node, and if the outer tunnel exit is determined to be GRE, a new IP tunnel is constructed according to the protocol connection address.
- the encapsulation format of the IP tunnel header is shown in the following table.
- the 32-bit source IP address refers to the address proposed by PE1
- the 32-bit destination IP address refers to the address established by PE2.
- step S608 the information of the IP tunnel header is encapsulated into the real outer tunnel exit GRE header on the VPN node to form a nested format of the outer GRE header plus the inner IP tunnel header; where the inside of the IP tunnel header is the VPN label and Payload.
- the following table shows the encapsulation format of packets forwarded by PE1 to PE2.
- the IP header includes a 32-bit source IP address and a 32-bit destination IP address.
- the 32-bit source IP address is the GRE tunnel source address
- the 32-bit destination IP address is the GRE tunnel destination address.
- step S610 the GRE splicing node obtains the forwarding information to the remote VPN node from the received message, and encapsulates the next segment of GRE header again and forwards it to the next splicing node.
- the step S610 includes: the GRE splicing node P1 obtains the forwarding information to the remote VPN node PE2 from the received message, that is, the address information carried in the IP tunnel header, and encapsulates the next segment again The GRE header is forwarded to the next splicing node P2, as shown in the following table.
- the above-mentioned IP header includes a 32-bit source IP address and a 32-bit destination IP address.
- the 32-bit source IP address is the address where P1 establishes the GRE tunnel
- the 32-bit destination IP address is the address where PE2 establishes the GRE tunnel.
- the GRE splicing node P2 obtains the forwarding information to the remote VPN node PE2 from the received message, that is, the address information carried in the IP tunnel header, and re-encapsulates the next segment of the GRE header and forwards it to the remote VPN node PE2, as shown in the following table Shown.
- the above-mentioned IP header includes a 32-bit source IP address and a 32-bit destination IP address.
- the 32-bit source IP address is the address where P2 establishes a GRE tunnel
- the 32-bit destination IP address is the address where P2 establishes a GRE tunnel.
- the remote VPN node PE2 receives the above message.
- the message format is a nested format of an outer GRE header plus an inner IP tunnel header.
- the inner part is the VPN label and payload.
- the outermost GRE header is decapsulated first. Then decapsulate the ip tunnel header, and then decapsulate the VPN label to implement VPN-related functions.
- the problem that the VPN cannot traverse the GRE multi-segment splicing network in the related technology can be solved without other special function requirements for the intermediate GRE network splicing node, and the diversity of network networking is enriched.
- the VPN device at the sending end is used to send the first GRE message encapsulated with the destination IP address, and the destination IP address
- the technical solution for the address of the VPN device at the receiving end effectively solves the problem that the splicing node cannot forward the message to the destination VPN node in the GRE splicing scenario in the related technology.
- modules or steps of the present disclosure can be implemented by a general computing device, and they can be concentrated on a single computing device or distributed in a network composed of multiple computing devices.
- they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device for execution by the computing device, and in some cases, can be different from this
- the steps shown or described are executed in the order in which they are shown, or they are respectively fabricated into individual integrated circuit modules, or multiple modules or steps of them are fabricated into a single integrated circuit module for implementation. In this way, the present disclosure is not limited to any specific combination of hardware and software.
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Abstract
Description
Claims (10)
- 一种报文传输方法,适用于传输路径中存在多段通用路由封装GRE隧道拼接,所述传输路径的两端为VPN节点,其中,所述方法包括:在确定传输路径中存在多段GRE隧道的情况下,发送端VPN设备发送封装有目的IP地址的第一GRE报文,所述目的IP地址为接收端VPN设备的地址。
- 如权利要求1所述的方法,其中,在发送端VPN设备发送封装有目的IP地址的第一GRE报文之前,所述方法还包括:在确定所述接收端VPN设备对应的外层隧道出口为GRE的情况下,所述发送端VPN设备创建IP隧道,IP隧道头中包括所述目的IP地址,所述IP隧道头封装在所述GRE报文中。
- 如权利要求2所述的方法,其中,所述IP隧道头中还包括VPN标签和载荷。
- 如权利要求2所述的方法,其中,所述传输路径中存在至少一个GRE拼接节点,在发送端VPN设备发送封装有目的IP地址的第一GRE报文之后,所述方法还包括:所述GRE拼接节点在收到所述第一GRE报文的情况下,获取所述目的IP地址,并根据下一段GRE隧道的类型进行GRE封装后形成第二GRE报文进行传输。
- 如权利要求2所述的方法,其中,所述IP隧道包括GRE隧道、IPsec隧道,或Vxlan隧道。
- 一种报文传输方法,适用于传输路径中存在多段通用路由封装GRE隧道拼接,所述传输路径的两端为VPN节点,所述传输路径中存在至少一个GRE拼接节点,其中,所述方法包括:所述GRE拼接节点在收到第一GRE报文的情况下,获取目的IP地址;根据下一段GRE隧道的类型进行GRE封装后形成第二GRE报文进行传输,其中所述第一GRE报文为发送端VPN设备发送的,所述第一GRE报文包括所述目的IP地址。
- 一种发送端VPN设备,适用于报文传输路径中存在多段通用路由封装GRE隧道拼接的场景,所述传输路径的接收端为VPN设备,其中,所述发送端VPN设备包括:发送模块,用于在确定传输路径中存在多段GRE隧道的情况下,发送封装有目的IP地址的第一GRE报文,所述目的IP地址为接收端VPN设备的地址。
- 一种GRE拼接设备,适用于报文传输路径中存在多段通用路由封装GRE隧道拼接 的场景,所述传输路径的两端为VPN设备,所述传输路径中存在至少一个GRE拼接设备,其中,所述GRE拼接设备包括:获取模块,用于在收到第一GRE报文的情况下,获取目的IP地址;传输模块,用于根据下一段GRE隧道的类型进行GRE封装后形成第二GRE报文进行传输,其中所述第一GRE报文为发送端VPN设备发送的,所述第一GRE报文包括所述目的IP地址。
- 一种计算机可读存储介质,其上存储有计算机程序,其中,所述计算机程序被处理器执行时实现如权利要求1-6任一项所述的报文传输方法的步骤。
- 一种报文传输系统,适用于传输路径中存在多段通用路由封装GRE隧道拼接的场景,所述传输路径的两端为VPN设备,所述传输路径中存在至少一个GRE拼接设备,其中,所述系统包括:发送端VPN设备,用于在确定传输路径中存在多段GRE隧道的情况下,发送封装有目的IP地址的第一GRE报文,所述目的IP地址为接收端VPN设备的地址;所述GRE拼接设备,用于在收到第一GRE报文的情况下,获取所述目的IP地址,并根据下一段GRE隧道的类型进行GRE封装后形成第二GRE报文进行传输。
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CN105591873A (zh) * | 2015-10-27 | 2016-05-18 | 杭州华三通信技术有限公司 | 一种虚拟机隔离方法和装置 |
CN109412927A (zh) * | 2018-12-04 | 2019-03-01 | 新华三技术有限公司 | 一种多vpn数据传输方法、装置及网络设备 |
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CN114422431B (zh) * | 2021-12-23 | 2023-11-28 | 网络通信与安全紫金山实验室 | 网络隧道配置方法、装置、计算机设备、存储介质 |
CN117376179A (zh) * | 2023-12-04 | 2024-01-09 | 成都北中网芯科技有限公司 | 一种gre协议报文的过滤方法、系统、设备及介质 |
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