WO2023174188A1

WO2023174188A1 - Packet processing method, routing announcement method, and related device

Info

Publication number: WO2023174188A1
Application number: PCT/CN2023/080968
Authority: WO
Inventors: 李军; 王海波; 李久勇; 刘少伟
Original assignee: 华为技术有限公司
Priority date: 2022-03-15
Filing date: 2023-03-13
Publication date: 2023-09-21

Abstract

Disclosed in the present application are a packet processing method, a routing announcement method, and a related device. By means of a source VTEP of a VXLAN tunnel, VXLAN information is encapsulated in an IPv6 header of a packet that is about to enter the VXLAN tunnel, and is forwarded to a destination VTEP of the VXLAN tunnel on the basis of the VXLAN tunnel, wherein the VXLAN information at least comprises a VNI. In this way, by means of a VXLAN encapsulation optimization mode provided in the present application, a UDP header and a VXLAN header no longer need to be encapsulated for a packet that is about to enter a VXLAN tunnel, and required VXLAN information, which is forwarded by means of the VXLAN tunnel, can also be carried in an IPv6 header of the packet and is then sent to a destination VTEP by means of the VXLAN tunnel, such that the encapsulation efficiency of the packet is effectively improved, thereby making efficient packet processing possible.

Description

A message processing method, route advertisement method and related equipment

This application claims priority to the Chinese patent application submitted to the State Intellectual Property Office of China on March 15, 2022, with application number 202210250923.7 and application title "A method and device for VXLAN6 message encapsulation", the entire content of which is incorporated by reference. incorporated in this application.

This application requests the priority of the Chinese patent application submitted to the State Intellectual Property Office of China on May 24, 2022, with the application number 202210570065.4 and the application title "A message processing method, a routing announcement method and related equipment", The entire contents of which are incorporated herein by reference.

Technical field

The present application relates to the field of communication technology, and in particular to a message processing method, a route advertisement method and related equipment.

Background technique

Virtual Extensible Local Area Network (VXLAN) is a network virtualization technology widely used in networks. For example, VXLAN technology is widely used in data communication networks (DCN). The source virtual extended LAN tunnel endpoint (VXLAN Tunnel EndPoint, VTEP) of the VXLAN tunnel encapsulates the VXLAN header, User Datagram Protocol (UDP) header, and Internet Protocol (Internet Protocol, IP) header in sequence for the received message. and the outer Ethernet header, and forwards the encapsulated packet in the VXLAN tunnel. When the encapsulated packet reaches the destination VTEP of the VXLAN tunnel, the destination VTEP pairs the received packet based on the VXLAN information in the VXLAN header of the received packet. messages are processed.

As the Internet Protocol (IP) gradually evolves from the fourth version of the Internet Protocol (Internet Protocol version 4, IPv4) to the sixth version of the Internet Protocol (Internet Protocol version 6, IPv6), VXLAN technology also gradually evolves from IPv4VXLAN to IPv6VXLAN (also known as VXLAN6). VXLAN6 processes packets transmitted through the VXLAN tunnel according to the above processing method, but there is a problem of low packet encapsulation efficiency.

Contents of the invention

Based on this, this application provides a packet processing method, a route advertisement method and related equipment, which can efficiently perform VXLAN encapsulation, improve packet encapsulation efficiency, and thereby achieve efficient packet processing.

In a first aspect, the present application provides a message processing method applied to a first communication device that serves as a source VTEP. For example, the method may include: the first communication device obtains a first message, and the first communication device serves as a source VTEP. The first message carries VXLAN information through the IPv6 header, and the VXLAN information at least includes a VXLAN Network Identifier (VNI). Therefore, the first communication device sends the first message to the second communication device through the VXLAN tunnel. The second communications device serves as the destination VTEP. The way in which the VXLAN information is encapsulated in the IPv6 header of the first packet can be recorded as the VXLAN encapsulation optimization method. Compared with the current VXLAN encapsulation method, the VXLAN encapsulation optimization method does not need to encapsulate the UDP header for the packet that is about to enter the VXLAN tunnel. and VXLAN header, it can also carry the VXLAN information required for VXLAN tunnel forwarding in the message and send it to the destination VTEP through the VXLAN tunnel, achieving the effect of transmitting the message in the VXLAN tunnel. It can be seen that the method provided by this application is effective It improves the encapsulation efficiency of packets, making the length of packets transmitted in the VXLAN tunnel smaller, making the source VTEP of the VXLAN tunnel encapsulate packets faster, and the source VTEP and intermediate nodes of the VXLAN tunnel processing packets faster. Fast. When the bandwidth remains unchanged, the source VTEP and intermediate nodes of the VXLAN tunnel can process more packets, enabling efficient packet processing. become possible.

In some implementations, the VXLAN information may be carried in the destination IPv6 address of the IPv6 header of the first message, that is, the IPv6 header of the first message includes the destination IPv6 address, and the destination IPv6 address includes the network of the destination VTEP. segment address and the VXLAN information. As an example, the VXLAN information may be carried in the last 64 bits of the destination IPv6 address. If the length of the VXLAN information is 64 bits, then the last 64 bits of the destination IPv6 address are all used to carry the VXLAN information; if the length of the VXLAN information is less than 64 bits, then the last 64 bits of the destination IPv6 address Some bits are used to carry the VXLAN information.

In other implementations, the VXLAN information may be carried in the source IPv6 address of the IPv6 header of the first message. That is, the IPv6 header of the first message includes the source IPv6 address, and the source IPv6 address includes the network of the source VTEP. segment address and the VXLAN information. As an example, the VXLAN information may be carried in the last 64 bits of the source IPv6 address. If the length of the VXLAN information is 64 bits, then the last 64 bits of the source IPv6 address are all used to carry the VXLAN information; if the length of the VXLAN information is less than 64 bits, then the last 64 bits of the source IPv6 address Some bits are used to carry the VXLAN information.

The length of the VNI in the VXLAN information may be less than or equal to 24 bits, and the VXLAN information may also include one or more of the following: at least one Flag; a Reserve field. For example, the VXLAN information can be found in the VXLAN information in the VXLAN header in the current VXLAN encapsulation method, including the 8-bit Flags, 24-bit VNI, and 32-bit Reserve fields. Among them, except for the fifth bit of Flag in the 8-bit Flag, which is an I flag, I=1 indicates that the VNI field in the VXLAN information is valid, and the other bits are reserved to be used.

In some implementations, the method may further include: the first communication device receiving a route advertisement message published by the destination VTEP, where the route advertisement message includes a route prefix, the next hop, the VNI and the first information, wherein, The next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; thus, the first communication device saves the network segment address of the destination VTEP, the VNI and The association relationship of the second information, the second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the IPv6 header to obtain the first packet. Wherein, the first communication device saves the association relationship between the network segment address of the destination VTEP, the VNI and the second information. For example, it may include: the first communication device stores the network segment address of the destination VTEP, the VNI The association with the second information is saved to the forwarding side. In this way, the first communication device receives the route advertisement message and saves the content in the route advertisement message, and is ready to process the service message on the forwarding plane. For example, the first communication device can obtain the first report based on the content encapsulation in the saved route advertisement message. Text and forward.

As an example, the first information may be carried through attributes or extended community attributes in the route advertisement message.

Wherein, the first information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. The second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. Wherein, the mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is an omitted reservation mode, and the length of the VXLAN information is The length is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits. For example, in the omitted reservation mode, the length of the VXLAN information is 32 bits, and the length of the VNI The length is 24 bits; or, the mode of the VXLAN information is a simplified compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and the M is an integer greater than or equal to 1. For example, in simplified compression mode, the VXLAN information includes 8 bits Flags and M-bit VNI.

For example, the extended attributes or extended community attributes used to carry the first information in the route advertisement message may include but are not limited to: Type field and SubType field, Flag, LocLen field and Reserved, where the Type field and the subtype SubType together identify the The attribute or extended community attribute is the first information, indicating VXLAN6 encapsulation optimization; the value of the LocLen field is used to indicate the length of the network segment address of the VTEP. In one case, the value of the LocLen field is fixed to 64 bits. In the other case, the value of the LocLen field is fixed to 64 bits. , the value of the LocLen field can be determined based on the length of the VXLAN information. For example, the length of the VXLAN information is 64 bits, then the value of the LocLen field can be equal to (128 bits - 64 bits) = 64 bits. For example, the length of the VXLAN information is 18 bits, then the value of the LocLen field can be equal to (128 bits - 18 bits) = 110 bits; the value of Flag is used to indicate the mode of carrying VXLAN information in the IPv6 header. For example, Flag = 1 can indicate the all-bit mode. The length of VXLAN information in mode is 8 bytes (i.e. 64 bits); Flag=2 can indicate that the reserved mode is omitted. In this mode, the length of VXLAN information can be 4 bytes (i.e. 32 bits), that is, the VXLAN information includes 8-bit Flag and 24-bit VNI fields; Flag=3 can indicate the streamlined compression mode. In this mode, the VXLAN information can only contain an 8-bit Flag and M (M is an integer greater than 1) bits of VNI, where M It can be defined according to the actual situation. For example, if there are only 212=4096 VNIs in the entire network, then the VNI can be defined only by the length of 12 bits. In this case, for example, the first byte of the Reserved field can be used to indicate the length of the VNI.

As an example, the first communication device obtaining the first message may include: the first communication device receiving the second message; and the first communication device matching the network segment of the destination VTEP according to the destination address of the second message. address, and obtain the VNI and the second information according to the association relationship; the first communication device encapsulates the second message according to the instructions of the second information, and obtains the first message. In this way, the first communication device uses the content published by the saved route advertisement message to process the received message to obtain the first message, thereby realizing optimized encapsulation of the received message using VXLAN encapsulation optimization.

In a second aspect, this application also provides a message processing method, applied to a second communication device, and the second communication device is used as a destination VTEP. The method may include, for example: the second communication device receives data through a VXLAN tunnel. The first message sent by the first communication device, the first message includes an IPv6 header, the IPv6 header includes VXLAN information, the VXLAN information includes the VXLAN network identifier VNI, and the first communication device serves as the source VTEP; The second communication device processes the first message according to the VXLAN information. In this way, the way in which the VXLAN information is encapsulated in the IPv6 header of the first packet can be recorded as a VXLAN encapsulation optimization method. Compared with the current VXLAN encapsulation method, this VXLAN encapsulation optimization method does not need to encapsulate the packets that are about to enter the VXLAN tunnel. The UDP header and VXLAN header can also carry the VXLAN information required for VXLAN tunnel forwarding in the message and send it to the destination VTEP through the VXLAN tunnel. The destination VTEP can process the received message based on the VXLAN information carried in the IPv6 header. , to achieve the effect of packet transmission in the VXLAN tunnel. Since the destination VTEP supports the method provided in the embodiment of this application, it is possible for the source VTEP and the intermediate node to efficiently encapsulate packets and process efficient packets.

In some implementations, the IPv6 header of the first message includes a destination IPv6 address, and the destination IPv6 address includes the network segment address of the destination VTEP and the VXLAN information. As an example, the VXLAN information carries In the last 64 bits of the destination IPv6 address. For example, all the last 64 bits of the destination IPv6 address are used to carry the VXLAN information.

In other implementations, the IPv6 header of the first message includes a source IPv6 address, and the source IPv6 address includes the network segment address of the source VTEP and the VXLAN information. As an example, the VXLAN information is carried in the last 64 bits of the source IPv6 address. For example, all the last 64 bits of the source IPv6 address are used to carry the VXLAN information.

As an example, the length of the VNI is less than or equal to 24 bits.

As an example, in addition to the VNI, the VXLAN information may also include one or more of the following: at least one Flag; a Reserve field.

In some implementations, before the second communication device receives the first message, the method may further include: the second communication device publishes a route advertisement message to the source VTEP, where the route advertisement message includes a route prefix, a download link, and a routing prefix. One hop, the VNI and first information, wherein the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization. The first information may be carried through attributes or extended community attributes in the route advertisement message. The first information may also indicate one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI.

In some implementations, the method may further include: the second communication device saving the association relationship between the network segment address of the destination VTEP, the VNI and second information, where the second information indicates the link including the VNI. VXLAN information is encapsulated in the IPv6 header of the first message. Wherein, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI.

Wherein, the mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is an omitted reservation mode, and the length of the VXLAN information is The length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is a streamlined compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and M is an integer greater than or equal to 1.

In some implementations, the second communication device processes the first message according to the VXLAN information, which may include: the second communication device matches the network segment of the destination VTEP according to the destination address of the first message. Address, obtain the VNI and the second information according to the association relationship; the second communication device obtains the VXLAN information from the IPv6 header of the first message based on the indication of the second information; second The communication device strips off the IPv6 header of the second message to obtain the second message; the second communication device forwards the second message according to the VXLAN information.

In a third aspect, the present application also provides a route advertisement method, applied to a first communication device that serves as a source VTEP. For example, the method may include: the first communication device receives a message sent by a second communication device. The route advertisement message includes the route prefix, the next hop, the virtual extended LAN VXLAN network identifier VNI and the first information, wherein the second communication device is used as the destination VTEP, and the next hop is the The network segment address of the destination VTEP, the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the first communication device saves the association between the network segment address of the destination VTEP, the VNI and the second information, the The second information instructs the source VTEP to encapsulate VXLAN information including the VNI in an IPv6 header. It can be seen that compared with the current VXLAN seal In the installation mode, the first communication device receives the supported VXLAN encapsulation optimization method advertised by the second communication device. It no longer needs to encapsulate UDP headers and VXLAN headers for packets that are about to enter the VXLAN tunnel, and can also forward the VXLAN tunnel required for VXLAN. The information is carried in the packet and sent to the destination VTEP through the VXLAN tunnel to achieve the effect of transmitting the packet in the VXLAN tunnel, which can effectively improve the encapsulation efficiency of the packet and make efficient packet processing possible.

In some implementations, the storing of the association between the network segment address of the destination VTEP, the VNI and the second information may include: storing the network segment address of the destination VTEP, the VNI and the second information. The association of information is saved to the forwarding surface.

As an example, the first information may be attributes or extended community attributes in the route advertisement message.

Wherein, the first information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. The second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. Wherein, the mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is an omitted reservation mode, and the length of the VXLAN information is The length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is a streamlined compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and M is an integer greater than or equal to 1.

Among them, the VXLAN information also includes one or more of the following: at least one Flag; a Reserve field.

In some implementations, the method may further include: the first communication device receives the first message; the first communication device matches the network segment address of the destination VTEP according to the destination address of the first message, and the first communication device matches the network segment address of the destination VTEP according to the association. Obtain the relationship between the VNI and the second information; the first communication device encapsulates the first message according to the instruction of the second information, and obtains a second message, where the second message includes the first IPv6 header, the first IPv6 header includes VXLAN information, and the VXLAN information includes the VNI; the first communication device sends the second message to the second communication device through a VXLAN tunnel. In this way, based on the saved content, the first communication device can encapsulate the received message in a VXLAN encapsulation optimization manner, thereby improving the encapsulation efficiency of the message.

In a fourth aspect, the present application also provides a method for route advertisement, applied to a second communication device that serves as a destination VTEP. For example, the method may include: the second communication device generates a route advertisement message, said The route advertisement message includes a route prefix, a next hop, a VXLAN network identifier VNI, and first information, where the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation. Optimize; the second communication device sends the route advertisement message to the first communication device, the first communication device serving as the source VTEP. It can be seen that compared with the current VXLAN encapsulation method, the second communication device notifies the first communication device of a method that supports VXLAN encapsulation optimization, and can carry out VXLAN information required for VXLAN tunnel forwarding in the IPv6 header of the packet. Processing, to achieve the effect of effective transmission of the message in the VXLAN tunnel, can effectively improve the encapsulation efficiency of the message, making efficient message processing possible.

In some implementations, the first information is an attribute or an extended community attribute in the route advertisement message.

Wherein, the first information also indicates one or more of the following: a mode in which the IPv6 header carries the VXLAN information; The length of the VXLAN information; the length of the VNI.

The VXLAN information may also include one or more of the following: at least one Flag; a Reserve field.

In some implementations, the method may further include: saving the association between the network segment address of the destination VTEP, the VNI and second information, the second information indicating that the VXLAN information including the VNI is encapsulated in the sixth version of the Internet Protocol in the IPv6 header.

Wherein, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI.

For example, the mode of the VXLAN information is the all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is the omitted reservation mode, and the length of the VXLAN information is The length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is a streamlined compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and M is an integer greater than or equal to 1.

In some implementations, the method may further include: the second communication device receives the first message sent by the first communication device through the VXLAN tunnel, the first message includes an IPv6 header, and the IPv6 header includes the VXLAN information; match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the second information according to the association relationship; based on the indication of the second information, obtain the Obtain the VXLAN information from the IPv6 header of the first message; peel off the IPv6 header of the second message to obtain the second message; forward the second message according to the VXLAN information. In this way, based on the saved content, the second communication device can decapsulate the received message in a VXLAN encapsulation-optimized manner, thereby improving message processing efficiency.

In a fifth aspect, embodiments of the present application provide a communication device, which can be applied to a first communication device. The communication device includes a transceiver unit and a processing unit.

In one example: the transceiver unit is configured to perform operations related to reception and/or transmission performed by the first communication device in the above first aspect and various possible implementations of the first aspect; the processing unit For performing operations other than reception and/or transmission-related operations performed by the first communication device in the above-mentioned first aspect and various possible implementations of the first aspect. In a specific implementation, the transceiver unit may include a receiving unit and/or a sending unit, the receiving unit is used to perform reception-related operations, and the sending unit is used to perform sending-related operations.

For example, the processing unit is configured to obtain a first message, the first message includes a sixth version of the Internet Protocol IPv6 header, the IPv6 header includes virtual extended LAN VXLAN information, and the VXLAN information includes a VXLAN network identifier VNI; send A unit configured to send the first message to a second communication device through a VXLAN tunnel, and the second communication device serves as the destination VTEP.

In some implementations, the IPv6 header includes a destination IPv6 address, and the destination IPv6 address includes the network segment address of the destination VTEP and the VXLAN information. As an example, the VXLAN information is carried in the last 64 bits of the destination IPv6 address. For example, all the last 64 bits of the destination IPv6 address are used to carry the VXLAN information.

In other implementations, the IPv6 header includes a source IPv6 address, and the source IPv6 address includes the source VTEP The network segment address and the VXLAN information. As an example, the VXLAN information is carried in the last 64 bits of the source IPv6 address. For example, all the last 64 bits of the source IPv6 address are used to carry the VXLAN information.

Wherein, the length of the VNI is less than or equal to 24 bits.

Wherein, the VXLAN information also includes one or more of the following: at least one Flag; a Reserve field.

In some implementations, the receiving unit is configured to receive a route advertisement message published by the destination VTEP. The route advertisement message includes a route prefix, a next hop, the VNI and first information, wherein the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the processing unit is also used to save the association between the network segment address of the destination VTEP, the VNI, and the second information relationship, the second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the IPv6 header to obtain the first packet. As an example, the processing unit is specifically configured to: save the association relationship between the network segment address of the destination VTEP, the VNI and the second information to the forwarding plane. The first information is an attribute or an extended community attribute in the route advertisement message.

Wherein, the first information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. For example, the mode of the VXLAN information is the all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is the omitted reservation mode, and the length of the VXLAN information is The length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is a streamlined compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and M is an integer greater than or equal to 1.

In some implementations, the processing unit includes: a receiving subunit, configured to receive the second message; and a processing subunit, configured to match the network segment address of the destination VTEP according to the destination address of the second message. The association relationship obtains the VNI and the second information; the processing subunit is also configured to encapsulate the second message according to the instructions of the second information to obtain the first message .

Wherein, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. For example, the mode of the VXLAN information is the all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is the omitted reservation mode, and the length of the VXLAN information is The length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is a streamlined compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and M is an integer greater than or equal to 1.

In another example: the transceiver unit is configured to perform reception and/or transmission related operations performed by the first communication device in the above third aspect and various possible implementations of the third aspect; the processing The unit is configured to perform operations other than the reception and/or transmission related operations performed by the first communication device in the above third aspect and various possible implementations of the third aspect. In a specific implementation, the transceiver unit may include a receiving unit and/or a sending unit, the receiving unit is used to perform reception-related operations, and the sending unit is used to perform sending-related operations.

For example, the receiving unit is configured to receive a route advertisement message sent by the second communication device, where the route advertisement message package including route prefix, next hop, virtual extended local area network VXLAN network identification VNI and first information, wherein the second communication device is used as the destination VTEP, the next hop is the network segment address of the destination VTEP, and the The first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the processing unit is configured to save the association between the network segment address of the destination VTEP, the VNI and the second information. The second information indicates that the source VTEP will The VXLAN information including the VNI is encapsulated in the Internet Protocol version 6 IPv6 header.

In some implementations, the processing unit is specifically configured to save the association relationship between the network segment address of the destination VTEP, the VNI and the second information to the forwarding plane. The first information is an attribute or an extended community attribute in the route advertisement message.

Wherein, the first information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. Wherein, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. For example, the mode of the VXLAN information is the all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is the omitted reservation mode, and the length of the VXLAN information is The length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is a streamlined compression mode, and the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and M is an integer greater than or equal to 1.

In some implementations, the receiving unit is further configured to receive the first message; the processing unit is further configured to match the network segment address of the destination VTEP according to the destination address of the first message. Obtain the VNI and the second information based on the association relationship; the processing unit is also configured to encapsulate the first message according to the instructions of the second information to obtain a second message. The second message includes a first IPv6 header, the first IPv6 header includes VXLAN information, and the VXLAN information includes the VNI; a sending unit configured to send the second message to the second communication device through a VXLAN tunnel. .

In a sixth aspect, embodiments of the present application provide a communication device, which can be applied to a second communication device. The communication device includes a transceiver unit and a processing unit.

In one example: the transceiver unit is configured to perform reception and/or transmission-related operations performed by the second communication device in the above second aspect and various possible implementations of the second aspect; the processing unit For performing operations other than the reception and/or transmission-related operations performed by the second communication device in the above-mentioned second aspect and various possible implementations of the second aspect. In a specific implementation, the transceiver unit may include a receiving unit and/or a sending unit, the receiving unit is used to perform reception-related operations, and the sending unit is used to perform sending-related operations.

For example, the receiving unit is configured to receive the first message sent by the first communication device through the virtual extended local area network VXLAN tunnel, the first message includes the sixth version of the Internet Protocol IPv6 header, the IPv6 header includes VXLAN information, and the The VXLAN information includes a VXLAN network identifier VNI, and the first communication device is used as a source VTEP; a processing unit is used to process the first message according to the VXLAN information.

In some implementations, the IPv6 header includes a destination IPv6 address, and the destination IPv6 address includes the destination VTEP. The network segment address and the VXLAN information. As an example, the VXLAN information is carried in the last 64 bits of the destination IPv6 address. For example, all the last 64 bits of the destination IPv6 address are used to carry the VXLAN information.

In other implementations, the IPv6 header includes a source IPv6 address, and the source IPv6 address includes the network segment address of the source VTEP and the VXLAN information. As an example, the VXLAN information is carried in the last 64 bits of the source IPv6 address. For example, all the last 64 bits of the source IPv6 address are used to carry the VXLAN information.

Wherein, the length of the VNI is less than or equal to 24 bits.

In some implementations, the sending unit is configured to publish a route advertisement message to the source VTEP. The route advertisement message includes a route prefix, a next hop, the VNI and first information, wherein the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization. The first information is an attribute or an extended community attribute in the route advertisement message.

In some implementations, the processing unit is also configured to save the association between the network segment address of the destination VTEP, the VNI, and second information. The second information indicates that the VXLAN information including the VNI is encapsulated in in the IPv6 header of the first packet.

In some implementations, the processing unit includes: a matching subunit, configured to match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the destination address according to the association relationship. the second information; the first obtaining subunit is used to obtain the VXLAN information from the IPv6 header of the first message based on the indication of the second information; the second obtaining subunit is used to strip the The IPv6 header of the second message is used to obtain the second message; the forwarding subunit is used to forward the second message according to the VXLAN information.

In another example: the transceiver unit is configured to perform reception and/or transmission-related operations performed by the second communication device in the above-mentioned fourth aspect and various possible implementations of the fourth aspect; the processing unit for execution Operations other than the receiving and/or sending related operations performed by the second communication device in the fourth aspect and various possible implementations of the fourth aspect. In a specific implementation, the transceiver unit may include a receiving unit and/or a sending unit, the receiving unit is used to perform reception-related operations, and the sending unit is used to perform sending-related operations.

For example, the processing unit is configured to generate a route advertisement message. The route advertisement message includes a route prefix, a next hop, a virtual extended LAN VXLAN network identifier VNI and first information, where the next hop is the destination VTEP. The network segment address, the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the sending unit is configured to send the route advertisement message to the first communication device, and the first communication device serves as the source VTEP. The first information is an attribute or an extended community attribute in the route advertisement message.

In some implementations, the processing unit is also configured to save the association between the network segment address of the destination VTEP, the VNI, and second information. The second information indicates that the VXLAN information including the VNI is encapsulated in In the IPv6 header of Internet Protocol version 6.

In some implementations, the receiving unit is configured to receive the first message sent by the first communication device through the VXLAN tunnel, the first message includes an IPv6 header, and the IPv6 header includes the VXLAN information; The processing unit is also configured to match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the second information according to the association relationship; the processing unit is also configured to Based on the indication of the second information, obtain the VXLAN information from the IPv6 header of the first message; the processing unit is also configured to strip the IPv6 header of the second message to obtain the second message; the sending unit is further configured to forward the second message according to the VXLAN information.

In a seventh aspect, the present application provides a communication device. The communication device includes a memory and a processor; the memory is used to store program code; the processor is used to run instructions in the program code, so that The communication device performs the above first aspect and the method described in any one of the first aspects, or causes the communication device to perform the above second aspect and the method described in any one of the second aspects, or causes the The communication device performs the above third The method described in any one of the above aspects and the third aspect, or causing the communication device to perform the method described in any one of the above fourth aspect and the fourth aspect.

In an eighth aspect, the present application provides a communication device. The communication device includes a communication interface and a processor. Through the communication interface and the processor, the communication device is caused to execute the method described in any of the preceding aspects and Part or all of the operations of any implementation of the method described in any aspect. In a specific implementation manner, the communication interface is used to perform the sending and receiving operations performed by the communication device described in any one of the above first aspect and the first aspect, and the processor is used to perform the above first aspect and the first aspect. Other operations other than the transceiver operation performed by the communication device described in any one of the above; or, the communication interface is used to perform the transceiver operation performed by the communication device according to any one of the above second aspect and the second aspect, so The processor is used to perform other operations other than the sending and receiving operations performed by the communication device described in any one of the above second aspect and the second aspect; or, the communication interface is used to perform the above third aspect and any one of the third aspects. A transceiver operation performed by the communication device described in one of the above, the processor is configured to perform other operations other than the transceiver operation performed by the communication device described in any one of the above third aspect and the third aspect; or, the communication The interface is used to perform the transceiver operation performed by the communication device described in any one of the fourth aspect and the fourth aspect, and the processor is used to perform the except operation performed by the communication device described in any one of the fourth aspect and the fourth aspect. Operations other than sending and receiving operations.

In a ninth aspect, embodiments of the present application provide a computer-readable storage medium, including instructions or computer programs that, when run on a processor, execute the above first aspect and the method described in any one of the first aspects, Or perform the above second aspect and the method described in any one of the second aspect, or perform the above third aspect and the method described in any one of the third aspect, or perform the above fourth aspect and any one of the fourth aspect. method described.

In a tenth aspect, embodiments of the present application provide a computer program product, including a computer program product that, when run on a processor, executes the above first aspect and the method described in any one of the first aspects, or executes the above The second aspect and the method described in any one of the second aspect, or perform the above third aspect and the method described in any one of the third aspect, or perform the above fourth aspect and the method described in any one of the fourth aspect .

In an eleventh aspect, embodiments of the present application provide a communication system, which includes at least two of the following: a first communication device that performs the above first aspect and the method described in any one of the above first aspects; The second communication device of the above second aspect and the method described in any one of the above second aspects.

In a twelfth aspect, embodiments of the present application provide a communication system, which includes at least two of the following: a first communication device that performs the above third aspect and the method described in any one of the above third aspects; The fourth aspect above and the second communication device of the method described in any one of the above fourth aspects.

Description of the drawings

Figure 1 is a schematic structural diagram of a network scenario applicable to the embodiment of the present application;

Figure 2a is a schematic diagram of using the current VXLAN6 encapsulation method to process L2 services in the scenario shown in Figure 1;

Figure 2b is a schematic diagram of using VXLAN6 encapsulation optimization method to process L2 services in the scenario shown in Figure 1;

Figure 3a is a schematic diagram of using the current VXLAN6 encapsulation method to process L3 services in the scenario shown in Figure 1;

Figure 3b is a schematic diagram of using VXLAN6 encapsulation optimization method to process L3 services in the scenario shown in Figure 1;

Figure 4a is a schematic diagram of the format of attributes carrying indication information 3 in the embodiment of the present application;

Figure 4b is a schematic format diagram of an example of attributes carrying indication information 3 in the embodiment of the present application;

Figure 5 is a schematic flowchart of the method 100 provided by the embodiment of the present application;

Figure 6 is a schematic diagram of VXLAN information in an embodiment of the present application;

Figure 7 is a schematic structural diagram of a first communication device provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of a first communication device provided by an embodiment of the present application;

Figure 9 is a schematic structural diagram of a second communication device provided by an embodiment of the present application;

Figure 10 is a schematic structural diagram of a second communication device provided by an embodiment of the present application;

Figure 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 12 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

VXLAN technology is used in many networks (such as DCN). Taking the VXLAN6 distributed solution networking of Telecom Cloud as an example, the network underlay is IPv6 single stack (IPv6Only, also known as pure IPv6), and network devices are all IPv6 addresses; the leaf nodes (Leaf) deploy IPv6 network virtual edge NVE (Network Virtualization Edge), IPv6NVE configures VTEP as an IPv6 address; the IPv6 address of VTEP publishes Virtual Private Network (VPN) routes through the underlay protocol; the aggregation node (Spine) serves as a route reflector (Route Reflector, RR), The VPN routes published by Leaf are reflected to other Leaf, so that all Leaf learn the VPN routes published by other Leaf through RR, and create VXLAN6 tunnels based on the next hop and the encapsulation attributes specified by the route. In this way, the packets to be transmitted can be transmitted through the created VXLAN tunnel.

Currently, after a VXLAN tunnel is created, the process of using the VXLAN tunnel to forward the packets to be transmitted may include: the source VTEP of the VXLAN tunnel (which can also be called the head node of the VXLAN tunnel) encapsulates the VXLAN headers in sequence for the packets to be transmitted. , UDP header, IP header and outer Ethernet header to obtain the processed message, and forward the processed message in the VXLAN tunnel. It can be seen that packets are transmitted through VXLAN tunnels. According to the current processing method, the number of encapsulation layers required is large and complex, and the packet encapsulation efficiency is low.

In particular, as IP evolves from IPv4 to IPv6, VXLAN also gradually evolves from VXLAN4 to VXLAN6. If the encapsulation method for transmitting packets in VXLAN4 technology is directly applied to VXLAN6, because there are more headers encapsulated for VXLAN tunnels, the IPv6 header is more complex than the IPv4 header, and the IPv6 address is longer than the IPv4 address, etc. For this reason, the packet encapsulation efficiency will be further reduced.

Based on this, embodiments of this application provide a technical solution for VXLAN6 encapsulation optimization (which can also be called IPv6+ or VXLAN6+). The VXLAN information is encapsulated in the IPv6 header of the packet that is about to enter the VXLAN tunnel through the source VTEP of the VXLAN tunnel. , forwarded to the destination VTEP of the VXLAN tunnel through the VXLAN tunnel, and the VXLAN information at least includes a VXLAN Network Identifier (VNI). In this way, compared with the current VXLAN encapsulation method, this optimized VXLAN encapsulation method no longer needs to encapsulate UDP headers and VXLAN headers for packets that are about to enter the VXLAN tunnel, and can also carry the VXLAN information required for VXLAN tunnel forwarding in the packets. Send the message to the destination VTEP through the VXLAN tunnel to achieve the effect of transmitting the message in the VXLAN tunnel. It can be seen that the VXLAN encapsulation optimization method provided by the embodiment of this application can effectively improve the encapsulation efficiency of the message and enable efficient message processing. become possible. Among them, improving the packet encapsulation efficiency can be understood as: this method makes the length of the packet transmitted in the VXLAN tunnel smaller, the source VTEP of the VXLAN tunnel encapsulates the packet faster, the source VTEP of the VXLAN tunnel and the intermediate node The processing speed of packets is faster, and the source of the VXLAN tunnel remains unchanged when the bandwidth is unchanged. VTEP and intermediate nodes can handle more packets.

In the embodiment of the present application, the VTEP address of each communication device in the network is adjusted from 128 bits to a network segment address less than 128 bits, for example, adjusted to a 64-bit VTEP network segment address, so that when encapsulating the IPv6 header of the message, the The adjusted network segment address of the VTEP and the concatenated content of the VXLAN information are filled in the IPv6 header. For example, the adjusted content of the VTEP network segment address and the concatenated VXLAN information are filled in the IPv6 header to carry the address. field (destination IPv6 address field or source IPv6 address field). In this way, the VXLAN information can be carried to the destination VTEP that needs to use the VXLAN information in this efficient manner without encapsulating the UDP header and VXLAN header in the message, thereby improving and optimizing the VXLAN6 encapsulation efficiency.

The following uses the network scenario shown in Figure 1 to compare and explain the current VXLAN6 encapsulation method and the VXLAN6 encapsulation optimization method provided by the embodiment of this application.

For example, the network scenarios to which the embodiments of this application are applicable may include the network scenario shown in Figure 1 . Referring to Figure 1, the network scene includes: communication device 1, communication device 2, communication device 3, terminal device 4, terminal device 5 and communication device 6. Terminal device 4 passes through communication device 1, communication device 3 and communication device 2 in sequence. The terminal device 5 is connected, and the communication device 3 is also connected to the communication device 6 . In the network scenario shown in Figure 1, N (N is an integer greater than or equal to 0) intermediate communication devices may be included between communication device 1 and communication device 2. In Figure 1, communication device 1 and communication device 2 include A communication device 3 is taken as an example. For example, communication device 1 and communication device 2 may be Leaf, and communication device 3 may be Spine as an RR.

Among them, communication device 1 establishes a VXLAN6 tunnel to communication device 2. Communication device 1 and communication device 2 serve as the source VTEP and destination VTEP of the VXLAN6 tunnel respectively, and the corresponding VTEP addresses are 10:1::1 and 10:2:: respectively. 1. It belongs to Broadcast Domain (BD) 1 and the VNI is 1001. The Media Access Control (MAC) address of the interface on the communication device 1 for connecting to the communication device 3 is BB-1-1. The interface on the communication device 3 for connecting to the communication device 1 and the interface for connecting communication The MAC address of the interface of device 2 is AA-1-1, and the MAC address of the interface on communication device 2 for connecting to communication device 3 is CC-1-1. The MAC address of communication device 1 is A-A-A, the MAC address of communication device 2 is C-C-C, and the MAC address of communication device 3 is B-B-B. The IP address of terminal device 4 is 10.1.1.1 and the MAC address is 1-1-1, and the IP address and MAC address of terminal device 5 is 10.1.1.2 and 2-2-2.

Taking layer 2 (L2) service as an example, as shown in Figure 2a, the process of transmitting messages in a VXLAN tunnel according to the current VXLAN6 encapsulation method may include: S11, the communication device 1 receives the message sent by the terminal device 4. Message 1, message 1 can include destination MAC address (DMAC): 2-2-2, source MAC address (SMAC): 1-1-1, source IPv6 address (SIPv6): 10.1.1.1, destination IPv6 address (DIPv6 ): 10.1.1.2 and payload. S12: Communication device 1 looks up the MAC table according to the destination MAC address of message 1, obtains the VXLAN6 information, and encapsulates message 1 to obtain message 2. Among them, message 2 can include: payload, inner Ether header (Inner Eth), VXLAN header, UDP header, IPv6 header and outer Ether header (Outer Eth). The inner Ether header includes DMAC: 2-2-2 and SMAC: 1-1-1, the VXLAN header may include but is not limited to at least one flag (Flag) and VNI: 1001; the UDP header includes the source port (SPort) and the destination port (DPort), where the destination port is 4789, indicating This message is a VXLAN message; the IPv6 header includes but is not limited to the Version field, the Flow Label field, the next header (NxtHdr) field, the source IPv6 address (SIPv6) field and the destination IPv6 address (DIPv6). field, where the value of the version field is used to indicate that the applicable protocol version is IPv6, and the value of the next header field is used to indicate the next step of the IPv6 header. The header is a UDP header, the value of the source IPv6 address field is 10:1::1, and the value of the destination IPv6 address field is 10:2::1; the outer Ethernet header includes the destination MAC address (DMAC): AA-1- 1 and source MAC address (SMAC): BB-1-1. S13, communication device 1 sends message 2 to communication device 3. Communication device 3 processes message 2 into message 3 according to the IPv6 header in message 2 and forwards it to communication device 2, where message 3 and message 2 The difference only includes: modifying the value of the DMAC field in the outer Ethernet header to the MAC address of communication device 2: CC-1-1, and modifying the value of the SMAC field to the MAC address of communication device 3: AA-1-1. S14, after receiving message 3, communication device 2 determines that message 3 is a VXLAN message based on the destination port 4789 in the UDP header, and then obtains VNI: 1001 from the VXLAN header of message 3, and searches based on VNI: 1001. For the corresponding BD, check the MAC in the BD to forward message 4. Message 4 is the message obtained after peeling off the outer Ethernet header, IPv6 header, UDP header and VXLAN header of message 3. This message 4 can be combined with the message 4. Text 1 includes the same content. S15, the terminal device 5 receives the message 4.

As shown in Figure 2b, the process of transmitting messages in a VXLAN tunnel according to the VXLAN6 encapsulation optimization method provided by the embodiment of the present application may include, for example, the following S21 to S25. However, before S21 to S25 are executed, the route is saved on the communication device 1 1. Route 1 includes the association 1 of the network segment address 10:2::, VNI:1001 of the communication device 2 and the instruction information 1. The instruction information 1 is used to instruct the packet to be encapsulated according to the VXLAN encapsulation optimization method. Route 2 and Route 3 are saved on the communication device 2. Route 2 is the host route. Route 2 includes the association 2 between 10:2::1 and VNI:1001. Route 3 is the network segment route. Route 3 includes the network of the communication device 2. Association relationship 2 between segment address 10:2::, VNI:1001 and instruction information 2. Instruction information 2 is used to instruct packet decapsulation according to the VXLAN encapsulation optimization method. Then, S21 to S25 include, for example: S21, the communication device 1 receives the message 1 sent by the terminal device 4. S22, communication device 1 checks the MAC table according to the destination MAC address of message 1 to obtain VXLAN6 information; matches route 1 according to the destination IPv6 address of message 1: 10.1.1.2, and matches message 1 based on the indication information 1 in route 1 Encapsulate the VXLAN6 encapsulation optimization method and obtain message 2'. Among them, message 2' can include: payload, inner Ethernet header, IPv6 header and outer Ethernet header. Among them, the IPv6 header includes but is not limited to: Version field, Flow Label field, NxtHdr field, source IPv6 address (SIPv6) field and destination IPv6 address (DIPv6) field, where the value of the Version field is used to indicate that the applicable protocol version is IPv6 , the value of the NxtHdr field is used to indicate that the next header of the IPv6 header is an Ethernet header, the value of the source IPv6 address field is 10:1::1, the value of the destination IPv6 address field is 64-bit 10:2:: and VXLAN As a result of information splicing, the VXLAN information may include but is not limited to at least one Flag and VNI; the outer Ethernet header includes the destination MAC address (DMAC): AA-1-1 and the source MAC address (SMAC): BB-1-1. S23, communication device 1 sends message 2' to communication device 3. Communication device 3 processes message 2' into message 3' according to the IPv6 header in message 2' and forwards it to communication device 2, where message 3 The difference between 'and message 2' only includes: modifying the value of the DMAC field in the outer Ethernet header to the MAC address of communication device 2: CC-1-1, and modifying the value of the SMAC field to the MAC address of communication device 3: AA-1-1. S24, after receiving the message 3', the communication device 2 matches the route 3 according to the destination IPv6 address field in the IPv6 header, thereby determining that the message 3' is a message encapsulated in the VXLAN6 encapsulation optimization method based on the indication information 2 in the route 3. Based on the instruction information 2, obtain the VXLAN information from the destination IPv6 address field of the IPv6 header, then find the corresponding BD according to the VNI: 1001 in the VXLAN information, check the MAC in the BD to forward the message 4', and the message 4' is the message 3' is the message obtained after stripping off the outer Ethernet header and IPv6 header. This message 4' can contain the same content as message 1. S25, the terminal device 5 receives the message 4.

Based on the above embodiments shown in Figure 2a and Figure 2b, it can be seen that the VXLAN6 encapsulation optimization method provided by the embodiment of the present application This method can improve the encapsulation efficiency of packets, thereby improving the efficiency of packet processing.

The above takes the processing process of L2 service packets in the VXLAN tunnel as an example to introduce the current VXLAN6 encapsulation method and the VXLAN6 encapsulation optimization method provided by the embodiment of this application. The VXLAN6 encapsulation optimization method provided by the embodiment of this application is also applicable to layer 3 (layer 3, L3) services.

For L3 services, as shown in Figure 3a, the process of transmitting messages in a VXLAN tunnel according to the current VXLAN6 encapsulation method may include, for example: S31. The communication device 1 receives the message 5 sent by the terminal device 4. The message 5 may include the source IPv6 address (SIPv6): 10.1.1.1, destination IPv6 address (DIPv6): 10.1.1.2 and payload. S32. Communication device 1 searches the Forward Information Base (FIB) table according to the destination IPv6 address of message 5, obtains the VXLAN6 information, and encapsulates message 5 to obtain message 6. Among them, message 6 can include: payload, inner Ethernet header, VXLAN header, UDP header, IPv6 header and outer Eth header (Outer Eth). The inner Ethernet header includes destination MAC address: C-C-C, source MAC address: A-A-A, The VXLAN header, UDP header, IPv6 header and outer Ethernet header correspond to the VXLAN header, UDP header, IPv6 header and outer Ethernet header in message 2 in Figure 2a. S33, communication device 1 sends message 6 to communication device 3. Communication device 3 processes message 6 into message 7 according to the IPv6 header in message 6 and forwards it to communication device 2, where message 7 and message 6 The difference only includes: modifying the value of the DMAC field in the outer Ethernet header to the MAC address of communication device 2: CC-1-1, and modifying the value of the SMAC field to the MAC address of communication device 3: AA-1-1. S34, after receiving message 7, communication device 2 determines that message 7 is a VXLAN message based on the destination port 4789 in the UDP header, and then obtains VNI: 1001 from the VXLAN header of message 7, and searches based on VNI: 1001. For the corresponding Virtual Routing Forwarding (VRF) instance, check the MAC in the VRF instance to forward message 8. Message 8 is obtained by stripping off the outer Ethernet header, IPv6 header, UDP header and VXLAN header of message 7. message, message 8 may contain the same content as message 5. S35, the terminal device 5 receives the message 8.

As shown in Figure 3b, the process of transmitting messages in a VXLAN tunnel according to the VXLAN6 encapsulation optimization method provided by the embodiment of the present application may include, for example, the following S41 to S45. However, before S41 to S45 are executed, the route is saved on the communication device 1 1. Route 1 includes the association 1 of the network segment address 10:2::, VNI:1001 of the communication device 2 and the instruction information 1. The instruction information 1 is used to instruct the packet to be encapsulated according to the VXLAN encapsulation optimization method. Route 2 and Route 3 are saved on the communication device 2. Route 2 is the host route. Route 2 includes the association 2 between 10:2::1 and VNI:1001. Route 3 is the network segment route. Route 3 includes the network of the communication device 2. Association relationship 2 between segment address 10:2::, VNI:1001 and instruction information 2. Instruction information 2 is used to instruct packet decapsulation according to the VXLAN encapsulation optimization method. Then, S41 to S45 include, for example: S41, the communication device 1 receives the message 5 sent by the terminal device 4. S42, communication device 1 checks the FIB table according to the destination IPv6 address of message 5 to obtain VXLAN6 information; matches route 1 according to the destination IPv6 address of message 5: 10.1.1.2, and matches message 5 based on the indication information 1 in route 1 Encapsulate the VXLAN6 encapsulation optimization method and obtain message 6'. Among them, the message 6' may include: payload, inner Ether header, IPv6 header and outer Ether header (Outer Eth). Among them, the IPv6 header includes but is not limited to: Version field, Flow Label field, NxtHdr field, source IPv6 address (SIPv6) field and destination IPv6 address (DIPv6) field, where the value of the Version field is used to indicate that the applicable protocol version is IPv6 , the value of the NxtHdr field is used to indicate that the next header of the IPv6 header is an Ethernet header, the value of the source IPv6 address field is 10:1::1, the value of the destination IPv6 address field is 64-bit 10:2:: and VXLAN The splicing result of the information. The VXLAN information can include but is not limited to at least one Flag and VNI; the outer Ethernet header includes the destination MAC address. (DMAC): AA-1-1 and source MAC address (SMAC): BB-1-1. S43, communication device 1 sends message 6' to communication device 3. Communication device 3 processes message 6' into message 7' according to the IPv6 header in message 6' and forwards it to communication device 2, where message 7 The difference between 'and message 6' only includes: modifying the value of the DMAC field in the outer Ethernet header to the MAC address of communication device 2: CC-1-1, and modifying the value of the SMAC field to the MAC address of communication device 3: AA-1-1. S44, after receiving the message 7', the communication device 2 matches the route 3 according to the destination IPv6 address field in the IPv6 header, thereby determining that the message 7' is a message encapsulated in the VXLAN6 encapsulation optimization method based on the indication information 2 in the route 3. Based on the instruction information 2, obtain the VXLAN information from the destination IPv6 address field of the IPv6 header, then find the corresponding VRF instance according to the VNI: 1001 in the VXLAN information, check the MAC in the VRF instance to forward the message 8', and the message 8' is Message 7' is the message obtained after stripping off the outer Ethernet header, IPv6 header, UDP header and VXLAN header. This message 8' may contain the same content as message 5. S45, the terminal device 5 receives the message 8'.

Based on the above embodiments shown in Figure 3a and Figure 3b, it can be seen that the VXLAN6 encapsulation optimization method provided by the embodiment of the present application can improve the encapsulation efficiency of packets, thereby improving the processing efficiency of packets.

In the above embodiments shown in Figures 2b and 3b, the splicing of VXLAN information in the destination IPv6 address field of the IPv6 header is used as an example for description. This does not constitute a position limit for carrying VXLAN information in the IPv6 header. For example, the VXLAN information can also be spliced into the source IPv6 address field of the IPv6 header. Then, the indication information 1 and the indication information 2 can also indicate the position of the VXLAN information in the IPv6 header, so that the communication device 2 can accurately obtain the information from the received packet. The VXLAN information is restored in this article.

For the routes saved on communication device 1 and communication device 2 in Figure 2b or Figure 3b, the specific route advertisement process may include: S51, for the VXLAN tunnel from communication device 1 to communication device 2, set the destination VTEP on communication device 2 The address is 10:2::1/64, and the source VTEP address is set to 10:1::1/64 on communication device 1; S52, a host route 2 and a 10:2::/64 are generated on communication device 2. Network segment route 3 of 10:2::1/128. In addition to destination: 10:2::1 and VNI: 1001, host route 2 can also include prefix length (PrefixLength): 128, network segment In addition to Destination: 10:2::, VNI: 1001 and indication information 2, route 3 may also include indication information 2. Instruction information 2 is used to indicate that packets hitting route 2 need to be encapsulated according to the VXLAN6 provided by the embodiment of this application. Optimized way to parse messages. S53, the communication device 2 generates a route advertisement message 1, which is used to publish the route 1. The route advertisement message 1 carries the VNI 1001 for the terminal device 4 to access the BD, and the next hop uses the destination VTEP address segment. The local address (i.e., 10:2::1) indicates that the encapsulation type is VXLAN and carries indication information 3. Instruction information 3 can use the attributes in the route advertisement message 1 (such as the Border Gateway Protocol (BGP) ) attribute) or extended community attribute bearer, the indication information 3 is used to indicate that route 1 can perform the VXLAN6 encapsulation optimization provided by the embodiment of this application. S54, the communication device 2 can send the route advertisement message 1 to the communication device 3 through the Ethernet virtual private network (EVPN) neighbor, and the communication device 3 sends the route advertisement message to other communication devices (including the communication device 1) . S55, after receiving the route advertisement message 1, the communication device 1 notifies the creation of the VXLAN tunnel according to the content in the route advertisement message 1, and saves the route 1. The route 1 includes Destination: 10:2::, VNI: 1001 and indication information 1. , the instruction information 1 is used to instruct the packet to be encapsulated according to the VXLAN encapsulation optimization method, where the instruction information 3 is determined based on the instruction information 3, that is, the route advertisement message 1 received by the communication device 1 includes the instruction information 3, then the communication When device 1 saves route 1 corresponding to route advertisement message 1, it generates indication information 1 related to indication information 3.

It should be noted that the premise that Figures 2b and 3b can be implemented is that the communication device 1 and the communication device support the VXLAN6 encapsulation optimization function provided by the embodiment of the present application. The instruction information 3 issued by the communication device 2 through the route advertisement message is used to instruct the communication device 2 that it hopes that the source VTEP that receives the route advertisement message 1 adopts a specific method of VXLAN encapsulation optimization. For the case where the source VTEP is communication device 1, communication device 1 can, based on the content indicated by indication information 3, associate the indication information 1 when generating the routing table and forwarding table of route 1 to guide the forwarding of packets that hit route 1. The packet is processed in the VXLAN6 encapsulation optimization method according to instruction information 1.

As long as one of the source VTEP and destination VTEP of the VXLAN tunnel does not support the VXLAN6 encapsulation optimization function provided by the embodiment of this application, the packets transmitted through the VXLAN tunnel can only be encapsulated and transmitted based on the current VXLAN encapsulation method. The VXLAN encapsulation optimization method provided by the embodiment of this application cannot be used for encapsulation and transmission. For example, the communication device 6 does not support the function of VXLAN6 encapsulation optimization. Even if the communication device 2 supports the function of VXLAN6 encapsulation optimization, the VXLAN tunnel between the communication device 6 and the communication device 2 cannot be established according to the VXLAN6 encapsulation optimization method provided by the embodiment of the present application. For packet encapsulation and transmission, the current VXLAN6 encapsulation method can be used for packet encapsulation and transmission. For example, the communication device 6 to the communication device 2 is a VXLAN tunnel, the communication device 6 serves as the source VTEP of the VXLAN tunnel, and sets the host address 20:1::1/128 as the VTEP address. After receiving the route advertisement message 1 of the communication device 2 transmitted by the communication device 3, the communication device 6 parses the route advertisement message 1 normally and finds that the route advertisement message 1 includes the attribute or extended community attribute carrying the indication information 3, but because it does not recognize the route advertisement message 1 Attributes or extended community attributes are not processed and continue to be processed according to the current route analysis process, notifying the creation of a VXLAN tunnel from communication device 6 to communication device 2, and generating a routing table and a forwarding table. Afterwards, when the communication device 6 receives a message from the access host to access the host connected to the communication device 2, it performs a DMAC or DIPv6 table lookup on the communication device 6, obtains the route published by the communication device 2, and performs VXLAN tunnel encapsulation. Since the route does not indicate encapsulation information according to the VXLAN6 encapsulation optimization method on the communication device 6, it is encapsulated according to the current VXLAN6 process, and DIPv6 is the host address of the communication device 2; after the encapsulated message is forwarded to the communication device 2, Communication device 2 determines that the DIPv6 of the received message hits host route 2 (i.e., route 2 of 10:2::1), and thus determines that it is a VXLAN message according to the UDP DPort: 4789 in the received message. The current VXLAN6 process is processed.

It should be noted that in VXLAN6 encapsulation optimization, the length of VXLAN information, the mode of VXLAN information, and the length of VNI can be statically configured on the entire network or the VTEP of a certain VXLAN tunnel, or they can be published through route advertisement messages. For example, the indication information 3 may also indicate one or more of the length of the VXLAN information, the mode of the VXLAN information, or the length of the VNI when VXLAN6 encapsulation is optimized. As an example, the attributes carrying the indication information 3 in the route advertisement message 1 can be found in As shown in Figure 4a, it includes: type (Type) field and subtype (SubType) field, flag (Flag), locator length (Locator Length, LocLen) field and reserved (Reserved), where the Type field and the subtype SubType are identified together This attribute is indication information 3, indicating VXLAN6 encapsulation optimization; the value of the LocLen field is used to indicate the length of the VTEP network segment address. In one case, the value of the LocLen field is fixed to 64 bits. In another case, the value of the LocLen field is fixed to 64 bits. The value of can be determined based on the length of the VXLAN information. For example, the length of the VXLAN information is 64 bits, then the value of the LocLen field can be equal to (128 bits - 64 bits) = 64 bits. For example, the length of the VXLAN information is 18 bits. Then, the value of the LocLen field can be equal to (128 bits - 18 bits) = 110 bits. In the embodiment of this application, the value of the LocLen field is 64 bits as an example for explanation; the value of Flag is used to indicate the mode of VXLAN information, for example, Flag=1, can indicate full bit mode, the The length of the VXLAN information in mode is 8 bytes (i.e. 64 bits). That is, the format of the VXLAN information can be seen in the VXLAN header in Figure 2a or Figure 3a. The VXLAN information includes the entire content of the VXLAN header in Figure 2a or Figure 3a; Flag=2 can indicate the Except Reserved mode. In this mode, the length of the VXLAN information is 4 bytes (that is, 32 bits). That is, the VXLAN information includes an 8-bit Flag and a 24-bit VNI field; Flag= 3. Can indicate simplified compression mode. In this mode, VXLAN information only contains 8-bit Flag and M (M is an integer greater than 1) bits of VNI. M can be defined according to the actual situation. For example, the entire network only has 212 = 4096 VNI, then the VNI can be defined only by the length of 12 bits. In this case, the attributes carrying indication information 3 can be seen in Figure 4b, including: Flag=3, LocLen=64, L=12, and Reserved, where , L is the first byte of the Reserved field in Figure 4a. When Flag=3, the value of L is used to indicate the length of the VNI. The Reserved field in Figure 4a can also be extended with other indication fields according to requirements, which is not limited in the embodiment of this application.

Taking message 1 in Figure 3b as an example, communication device 1 matches route 1 according to DIPv6, VNI is 1001, and instruction information 3 indicates encapsulation in the full-bit mode VXLAN encapsulation optimization method, LocLen=64, then message 6 'The destination IPv6 address field in the IPv6 header can be 10:2:0:0:0:0:0003:E900, where 0003:E90 is the 24-bit VNI. If the communication device 6 does not support the VXLAN6 encapsulation optimization method provided by the embodiment of the present application, after receiving the message 1 destined for the communication device 2, according to the current VXLAN6 encapsulation method, the destination IPv6 address field of the IPv6 header of the message can be Take 10:2:0:0:0:0:0:1 (that is, 10:2::1).

Taking the message 7' in Figure 3b as an example, after the communication device 2 receives the message 7', based on the value of the destination IPv6 address field of the message 7' (such as 10:2:0:0:0:0:0003 :E900) hits the network segment route 3 and finds that the network segment route 3 includes indication information 2. Then, based on the indication information 2, it is determined that the message 7' is a message encapsulated according to the VXLAN6 encapsulation optimization method. At the same time, the encapsulated packet is saved locally. Specific methods (such as the mode of the VXLAN information, the length of the VXLAN information or the length of the VNI), thereby obtaining the VXLAN information from the message 7' and decapsulating the message 7'. Assume that the value of the destination IPv6 address field (such as 10:2:0:0:0:0:0:1) of the message received by communication device 2 hits host route 2, then communication device 2 can parse the received message. The UDP header, VXLAN header, etc. in the packet are obtained, the VXLAN information is obtained, and the packet is decapsulated.

It should be noted that the communication device can generate a routing table and a forwarding table based on the route and then forward the message based on the forwarding table. For convenience, this process is simply described in the embodiment of this application as: the communication device saves the route and then forwards the message based on the route. The text is processed, and in the embodiment of this application, the two have the same meaning.

It should be noted that the terminal device may be a host or a server, for example. The communication device can be a network device such as a switch or a router; it can also be a part of the network device, such as a single board or line card on the network device; it can also be a functional module on the network device; it can also be used to implement The chip of the method provided by the embodiment of the present application is not specifically limited by the embodiment of the present application. When the communication device is a chip, the transceiver unit used to implement the method may be, for example, an interface circuit of the chip, and the processing unit may be a processing circuit with a processing function in the chip. The communication devices may be directly connected through, but not limited to, Ethernet cables or optical cables.

The above is an introduction to the embodiments of the present application in the form of scenario embodiments. The specific implementation manner of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Figure 5 is a schematic flowchart of the method 100 provided by the embodiment of the present application. For ease of understanding, in the method 100, the embodiment of the present application is described based on the interaction between the first communication device and the second communication device. Wherein, the first communication device and A VXLAN tunnel is established between the second communication devices. The first communication device is used as the source VTEP, and the second communication device is used as the destination VTEP. The first communication device may correspond to the communication device 1 in Figure 1, and the second communication device may correspond to the communication device 1 in Figure 1. For the communication device 2 in , for specific implementation methods and related descriptions, please refer to the relevant content in Figure 2b and Figure 3b.

As shown in Figure 5, the method 100 may include, for example, the following S101 to S108:

S101. The second communication device generates a route advertisement message. The route advertisement message includes a route prefix, a next hop, a VNI and first information, where the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization.

S102. The second communication device sends the route advertisement message to the first communication device.

S103. The first communication device receives the route advertisement message sent by the second communication device.

S104. The first communication device saves the association between the network segment address of the destination VTEP, the VNI, and second information. The second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the IPv6 header.

VXLAN tunnels are encapsulated using the VXLAN6 encapsulation optimization method. Both the source VTEP and the destination VTEP of the VXLAN tunnel need to support the VXLAN6 encapsulation optimization function. The source VTEP needs to know whether the destination VTEP supports the VXLAN6 encapsulation optimization function.

For S101, when the second communication device determines that it supports the function of VXLAN6 encapsulation optimization, it can let the first communication device know that the second communication device supports the function of VXLAN6 encapsulation optimization through a route advertisement message, that is, the route communication message carrying function in S101 First information indicating that the destination VTEP (ie, the second communication device) supports VXLAN encapsulation optimization, and the first information may be carried through attributes or extended community attributes in the route advertisement message. In some implementations, the first information also indicates one or more of the following: a mode in which the IPv6 header carries the VXLAN information; a length of the VXLAN information; and a length of the VNI.

The route advertisement message may be an EVPN route, and the route type may be 1, 2, 3 or 5, for example.

As an example, if the first information only indicates that the destination VTEP supports VXLAN encapsulation optimization, then the route advertisement message may carry the first information through a new extended attribute or an extended community attribute, and the type of the new extended attribute or extended community attribute is represented by VTEP supports VXLAN encapsulation optimization for indicated purposes.

As another example, if the first information not only indicates that the destination VTEP supports VXLAN encapsulation optimization, but also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; the length of the VNI length, then the route advertisement message can carry the first information through the new extended attribute or the extended community attribute. New extended attributes or extended community attributes may include but are not limited to: Type field and SubType field, Flag, LocLen field and Reserved, where the Type field and the subtype SubType together identify the attribute or extended community attribute as the first information, indicating VXLAN6 Encapsulation optimization; the value of the LocLen field is used to indicate the length of the VTEP network segment address. In one case, the value of the LocLen field is fixed to 64 bits. In another case, the value of the LocLen field can be determined based on the length of the VXLAN information. For example, if the length of the VXLAN information is 64 bits, then the value of the LocLen field can be equal to (128 bits - 64 bits) = 64 bits. For another example, if the length of the VXLAN information is 18 bits, then the value of the LocLen field can be equal to (128 bits). bits - 18 bits) = 110 bits. In the embodiment of this application, the value of the LocLen field is 64 bits. The value of Flag is used to indicate the mode of carrying VXLAN information in the IPv6 header. For example, Flag = 1 can indicate All-bit mode. In this mode, the length of the VXLAN information is 8 bytes (i.e. 64 bits). That is, the format of the VXLAN information can be seen in the VXLAN header in Figure 2a or Figure 3a. The VXLAN information includes the figure 2a or the entire content of the VXLAN header in Figure 3a; Flag = 2 can indicate that the reserved mode is omitted. In this mode, the length of the VXLAN information can be 4 bytes (that is, 32 bits), that is, the VXLAN information includes an 8-bit Flag and 24-bit VNI field; Flag=3, which can indicate the streamlined compression mode. In this mode, the VXLAN information can only contain an 8-bit Flag and M (M is an integer greater than 1) bits of VNI, where M can be defined according to the actual situation. For example, if there are only 212=4096 VNIs in the entire network, then the VNI can be defined only by a length of 12 bits. In this case, for example, the first byte of the Reserved field can be used to indicate the length of the VNI. The first information in the route advertisement message may correspond to the indication information 3 in the route advertisement message 1. The format of the newly extended attributes or extended community attributes carrying the first information may be as shown in Figure 4a.

In addition to VNI, VXLAN information may also include one or more of the following: at least one Flag; Reserve field. In one case, the VXLAN information includes all the contents of the VXLAN header in the current VXLAN encapsulation. Then, the format of the VXLAN information can be seen in Figure 6, including: 8-bit Flag, 24-bit Reserved field, 24-bit VNI and 8-bit VNI. Reserved field of bits. Among them, except for the fifth bit of Flag in the 8-bit Flag, which is an I flag, I=1 indicates that the VNI field in the VXLAN information is valid, and the other bits are reserved to be used. Then, the first information may indicate that the mode in which the IPv6 header carries VXLAN information is the all-bit mode. In the all-bit mode, the length of the VXLAN information is 64 bits, and the length of the VNI is 24 bits. In another case, the length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits. For example, the VXLAN information may include an 8-bit Flag and a 24-bit Flag. VNI, then the first information may indicate that the mode in which the IPv6 header carries VXLAN information is the omitted reservation mode. In the omitted reservation mode, the length of the VXLAN information is 32 bits, and the length of the VNI is 24 bits. In another case, the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and the M is an integer greater than or equal to 1, for example, VXLAN The information may include an 8-bit Flag and an M-bit VNI. Then, the first information may indicate that the mode in which the IPv6 header carries the VXLAN information is the reduced compression mode. The first information may also indicate that the length of the VNI is M, and the VXLAN information in the reduced compression mode is The length is (8+M) bits. The following description takes as an example that the length of the VXLAN information in the omitted reservation mode is 32 bits and the length of the VXLAN information in the simplified compression mode is (8+M) bits.

It should be noted that in the method 100, the route advertisement message carries the first information to inform the second communication device at the opposite end of the first communication device of the specific method of VXLAN6 encapsulation optimization that it wishes to adopt (such as the length of the VXLAN information, the mode of the VXLAN information) and the length of the VNI). In other implementations, the route advertisement message does not need to carry the first information. The specific method of VXLAN6 encapsulation optimization can be statically configured on the VTEP of the entire network or a certain VXLAN tunnel, that is, on A specific method for configuring in the first communication device and the second communication device at least one VXLAN6 encapsulation optimization method supported by both.

For S104, the first communication device saves the association between the network segment address of the destination VTEP, the VNI and the second information, which may include: the first communication device saves the network segment address of the destination VTEP, the VNI and the second information. The association relationship of the second information is saved to the forwarding surface. For example, after receiving the route advertisement message, the first communication device obtains the network segment address of the destination VTEP and the VNI by parsing the route advertisement message, and generates a route based on the network segment address of the destination VTEP and the VNI. table and forwarding table, and generate second information corresponding to the first information for the generated routing table and forwarding table. The second information may be, for example, a mark in the generated routing table and forwarding table, indicating that the first communication device The VXLAN information including the VNI is encapsulated in the IPv6 header of the received message matching the routing table or forwarding table. In addition, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. The second information may correspond to the indication information 1 of route 1 in the above scenario embodiment. For details, please refer to the relevant description of the indication information 1.

In some implementations, the first communication device supports the VXLAN6 encapsulation optimization method indicated in the received route advertisement message, and locally saves the association relationship between the network segment address of the destination VTEP, the VNI and the second information, and provides the information for later reception. The packets transmitted through this VXLAN tunnel are ready to be encapsulated in the VXLAN6 encapsulation optimization method. For the second communication device, in order to parse and process the packets encapsulated by the first communication device using the VXLAN6 encapsulation optimization method, the second communication device may also save the network segment address of the destination VTEP, the VNI and the third The correlation relationship of the information, the third information indicates that the VXLAN information including the VNI is encapsulated in the IPv6 header of the sixth version of the Internet Protocol. In addition, the third information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. The third information may correspond to the indication information 2 of route 3 in the above scenario embodiment. For details, please refer to the relevant description of the indication information 2.

The above-mentioned S101 to S104 prepare for the adoption of the VXLAN6 encapsulation optimization method between the first communication device and the second communication device through the route advertisement method, so that the VXLAN6 encapsulation optimization method is adopted between the first communication device and the second communication device. It is possible to encapsulate messages and improve the efficiency of message encapsulation.

S105. The first communication device obtains a first message, the first message includes an IPv6 header, the IPv6 header includes VXLAN information, and the VXLAN information includes a VNI.

As an example, S105 may include: S1051, the first communication device receives the second message; S1052, the first communication device matches the network segment address of the destination VTEP according to the destination address of the second message. The network segment address of the destination VTEP, the association between the VNI and the second information is obtained to obtain the VNI and the second information; S1053, the first communication device responds to the second report according to the instructions of the second information. The message is encapsulated to obtain the first message. The second message may correspond to message 1 in Figure 2b, and the first message corresponds to message 2' in Figure 2b. Alternatively, the second message may correspond to message 5 in Figure 3b, and the first message corresponds to message 6' in Figure 3b.

In some implementations, the IPv6 header of the first message includes a destination IPv6 address, and the destination IPv6 address includes the network segment address of the destination VTEP and the VXLAN information. In the destination IPv6 address, the first 64 bits may be used to carry the network segment address of the destination VTEP, and the VXLAN information is carried in the last 64 bits of the destination IPv6 address. In one case, the mode of carrying VXLAN information in the IPv6 header is all-bit mode, then all the last 64 bits of the destination IPv6 address are used to carry the VXLAN information; in another case, the VXLAN information is carried in the IPv6 header The mode is the omitted reservation mode, then 32 bits of the last 64 bits of the destination IPv6 address are used to carry the VXLAN information; in another case, the mode carrying VXLAN information in the IPv6 header is the streamlined compression mode, then , (8+M) bits among the last 64 bits of the destination IPv6 address are used to carry the VXLAN information. It should be noted that the length of the network segment address of the destination VTEP in the destination IPv6 address can also be greater than 64 bits. For example, when the length of the VXLAN information is less than 64 bits, the length of the network segment address of the destination VTEP in the destination IPv6 address can be equal to 128 bits. Bit minus the length of the VXLAN message.

In other implementations, the IPv6 header of the first message includes a source IPv6 address, and the source IPv6 address includes the network segment address of the source VTEP and the VXLAN information. Among them, the first 64 bits of the source IPv6 address can be used for It carries the network segment address of the source VTEP, and the VXLAN information is carried in the last 64 bits of the source IPv6 address. In one case, the mode of carrying VXLAN information in the IPv6 header is all-bit mode, then all the last 64 bits of the source IPv6 address are used to carry the VXLAN information; in another case, the VXLAN information is carried in the IPv6 header The mode is the omitted reservation mode, then 32 bits of the last 64 bits of the source IPv6 address are used to carry the VXLAN information; in another case, the mode carrying VXLAN information in the IPv6 header is the streamlined compression mode, then , (8+M) bits among the last 64 bits of the source IPv6 address are used to carry the VXLAN information. It should be noted that the length of the network segment address of the source VTEP in the source IPv6 address can also be greater than 64 bits. For example, when the length of the VXLAN information is less than 64 bits, the length of the network segment address of the destination VTEP in the source IPv6 address can be equal to 128 bits. Bit minus the length of the VXLAN message. In this case, the first information, the second information and the third information may also indicate that the VXLAN information is in the source IPv6 address of the IPv6 header, so that the first communication device and the second communication device can optimize the VXLAN6 encapsulation based on the embodiments of the present application. method for efficient message processing.

S106: The first communication device sends the first message to the second communication device through the VXLAN tunnel.

S107. The second communication device receives the first message sent by the first communication device through the VXLAN tunnel. The first message includes an IPv6 header, the IPv6 header includes VXLAN information, and the VXLAN information includes a VNI.

S108: The second communication device processes the first message according to the VXLAN information.

It should be noted that if there is an intermediate communication device between the first communication device and the second communication device, then the first message in S107 and S108 and the first message in S105 and S106 are the sources of the outer Ethernet header. The MAC address and the destination MAC address are different, and other parts are the same; if there is no intermediate communication device between the first communication device and the second communication device, then the first message in S107 and S108 and the first message in S105 and S106 same.

For example, S108 may include: S1081, the second communication device matches the network segment address of the destination VTEP according to the destination address of the first message, and the second communication device matches the network segment address of the destination VTEP according to the network segment address of the destination VTEP, the The correlation relationship between the VNI and the third information is obtained to obtain the VNI and the third information; S1082, the second communication device obtains the VNI and the third information from the IPv6 header of the first message based on the indication of the third information. VXLAN information; S1083, the second communication device strips off the IPv6 header of the second message and obtains a third message; S1084, the second communication device forwards the third message according to the VXLAN information. Corresponding to the network scenario shown in Figure 1, the third information may correspond to the indication information 2 of route 3 in the above scenario embodiment. In one case, the first message may correspond to the message 3' in Figure 2b, and the third message may correspond to the message 3' in Figure 2b. The message corresponds to the message 4' in Figure 2b; in another case, the first message may correspond to the message 7' in Figure 3b, and the third message corresponds to the message 8' in Figure 3b. For specific implementation methods and achieved effects, please refer to the relevant descriptions in Figure 2b or Figure 3b.

It should be noted that S101 to S104 can be implemented individually as a route advertisement method, and S105 to S108 can also be implemented individually as a message processing method. In S101 to S104, the operations performed by the first communication device and the second communication device may exist as one embodiment respectively, and do not affect the implementation of the VXLAN encapsulation optimization method provided by this application. In S105 to S108, the operations performed by the first communication device and the second communication device may exist as one embodiment respectively, and do not affect the implementation of the VXLAN encapsulation optimization method provided by this application.

It can be seen that through this method 100, the source VTEP of the VXLAN tunnel encapsulates the VXLAN information in the IPv6 header of the packet that is about to enter the VXLAN tunnel, and forwards it to the destination VTEP of the VXLAN tunnel through the VXLAN tunnel. The VXLAN information at least includes the VXLAN network Identifier (VXLAN Network Identifier, VNI). in this way, Compared with the current VXLAN encapsulation method, this optimized VXLAN encapsulation method no longer needs to encapsulate UDP headers and VXLAN headers for packets that are about to enter the VXLAN tunnel. It can also carry the VXLAN information required for VXLAN tunnel forwarding in the packet through VXLAN. The tunnel is sent to the destination VTEP to realize the effect of transmitting the packet in the VXLAN tunnel, which can effectively improve the encapsulation efficiency of the packet and make efficient packet processing possible.

An embodiment of the present application also provides a first communication device, where the first communication device includes: a transceiver unit and a processing unit;

The transceiver unit is configured to perform the receiving and/or sending operations performed by the first communication device as described in the above method embodiment;

The processing unit is configured to perform operations other than the receiving and/or sending operations performed by the first communication device described in the above method embodiments.

In a specific example, see FIG. 7 , which is a schematic structural diagram of a first communication device provided by an embodiment of the present application. The first communication device 700 shown in FIG. 7 may include, for example, a processing unit 701 and a sending unit 702.

In some embodiments:

The processing unit 701 is used to obtain the first message, the first message includes the sixth version of the Internet Protocol IPv6 header, the IPv6 header includes virtual extended LAN VXLAN information, and the VXLAN information includes the VXLAN network identifier VNI;

The sending unit 702 is configured to send the first message to a second communication device through a VXLAN tunnel, and the second communication device serves as the destination VTEP.

Wherein, the length of the VNI is less than or equal to 24 bits.

In some implementations, the receiving unit is configured to receive a route advertisement message published by the destination VTEP. The route advertisement message includes a route prefix, a next hop, the VNI and first information, wherein the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the processing unit 701 is also used to save the network segment address of the destination VTEP, the VNI, and the second information The second information indicates that the source VTEP encapsulates the VXLAN information including the VNI in the IPv6 header to obtain the first packet. As an example, the processing unit 701 is specifically configured to save the association relationship between the network segment address of the destination VTEP, the VNI and the second information to the forwarding plane. The first information is an attribute or an extended community attribute in the route advertisement message.

Wherein, the first information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. For example, the mode of the VXLAN information is the all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is the omitted reservation mode, and the length of the VXLAN information is The length is 32 bits, and the length of the VNI is 24 bits; or, the mode of the VXLAN information is a streamlined compression mode, the VXLAN information includes 8-bit Flags and M-bit VNI, and the M is greater than or equal to 1 integer.

In some implementations, the processing unit 701 includes: a receiving subunit, used to receive the second message; a processing subunit, used to match the network segment address of the destination VTEP according to the destination address of the second message, Obtain the VNI and the second information according to the association relationship; the processing subunit is also configured to encapsulate the second message according to the instructions of the second information to obtain the first message. arts.

Wherein, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. For example, the mode of the VXLAN information is the all-bit mode, the length of the VXLAN information is 64 bits, and the VNI length is 24 bits; or the mode of the VXLAN information is the omitted reservation mode, and the length of the VXLAN information is The length is 32 bits, and the length of the VNI is 24 bits; or, the mode of the VXLAN information is a streamlined compression mode, the VXLAN information includes 8-bit Flags and M-bit VNI, and the M is greater than or equal to 1 integer.

Regarding the specific implementation of each unit of the first communication device 700, reference may be made to the relevant descriptions of the above method embodiments, and the description will not be repeated this time.

In another specific example, refer to FIG. 8 , which is a schematic structural diagram of a first communication device provided by an embodiment of the present application. The first communication device 800 shown in FIG. 8 may include, for example, a receiving unit 801 and a processing unit 802.

In some embodiments:

Receiving unit 801, configured to receive a route advertisement message sent by a second communication device, where the route advertisement message includes a route prefix, a next hop, a virtual extended local area network VXLAN network identifier VNI, and first information, wherein the second communication device Used as a destination VTEP, the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization;

The processing unit 802 is configured to save the association between the network segment address of the destination VTEP, the VNI, and second information. The second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in version 6. Internet Protocol IPv6 header.

In some implementations, the processing unit 802 is specifically configured to save the association relationship between the network segment address of the destination VTEP, the VNI and the second information to the forwarding plane. The first information is an attribute or an extended community attribute in the route advertisement message.

Wherein, the first information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. Wherein, the second information also indicates one or more of the following: the mode in which the IPv6 header carries the VXLAN information; the length of the VXLAN information; and the length of the VNI. For example, the mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the length of the VNI is 24 bits; or the mode of the VXLAN information is an omitted reservation mode, and the VXLAN information is an omitted reservation mode. The length of the information is 32 bits, and the length of the VNI is 24 bits; or, the mode of the VXLAN information is a simplified compression mode, the VXLAN information includes 8-bit Flags and M-bit VNI, and the M is greater than or An integer equal to 1.

In some implementations, the receiving unit 801 is also configured to receive the first message; the processing unit 802 is also configured to match the network segment address of the destination VTEP according to the destination address of the first message, Obtain the VNI and the second information according to the association relationship; the processing unit 802 is also configured to encapsulate the first message according to the instructions of the second information to obtain a second message, The second message includes a first IPv6 header, the first IPv6 header includes VXLAN information, and the VXLAN information includes the VNI; a sending unit configured to send the first communication device to the second communication device through a VXLAN tunnel. Two messages.

Regarding the specific implementation of each unit of the first communication device 800, you may refer to the relevant descriptions of the above method embodiments, and the description will not be repeated this time.

The embodiment of the present application also provides a second communication device, the second communication device includes: a transceiver unit and a processing unit;

The transceiver unit is configured to perform the receiving and/or sending operations performed by the second communication device as described in the above method embodiment;

The processing unit is configured to perform operations other than the receiving and/or sending operations performed by the second communication device as described in the above method embodiments.

In a specific example, see FIG. 9 , which is a schematic structural diagram of a second communication device provided by an embodiment of the present application. The second communication device 900 shown in FIG. 9 may include, for example, a receiving unit 901 and a processing unit 902.

In some embodiments:

The receiving unit 901 is configured to receive the first message sent by the first communication device through the virtual extended local area network VXLAN tunnel. The first message includes the sixth version of the Internet Protocol IPv6 header, and the IPv6 header includes VXLAN information. The VXLAN The information includes a VXLAN network identification VNI, the first communications device serving as a source VTEP;

The processing unit 902 is configured to process the first packet according to the VXLAN information.

Wherein, the length of the VNI is less than or equal to 24 bits.

In some implementations, the processing unit 902 is also configured to save the association between the network segment address of the destination VTEP, the VNI, and second information, where the second information indicates the VXLAN information encapsulation including the VNI. In the IPv6 header of the first packet.

In some implementations, the processing unit 902 includes: a matching subunit, configured to match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and The second information; a first obtaining subunit, used to obtain the VXLAN information from the IPv6 header of the first message based on the indication of the second information; a second obtaining subunit, used to strip off all The IPv6 header of the second message is used to obtain the second message; the forwarding subunit is configured to forward the second message according to the VXLAN information.

Regarding the specific implementation of each unit of the second communication device 900, reference may be made to the relevant descriptions of the above method embodiments, and the description will not be repeated this time.

In another specific example, reference can be made to FIG. 10 , which is a schematic structural diagram of a second communication device provided by an embodiment of the present application. The second communication device 1000 shown in FIG. 10 may include, for example, a processing unit 1001 and a sending unit 1002.

In some embodiments:

The processing unit 1001 is configured to generate a route advertisement message. The route advertisement message includes a route prefix, a next hop, a virtual extended LAN VXLAN network identifier VNI, and first information, where the next hop is the network of the destination VTEP. Segment address, the first information indicates that the destination VTEP supports VXLAN encapsulation optimization;

Sending unit 1002, configured to send the route advertisement message to a first communication device, where the first communication device is used as Source VTEP. The first information is an attribute or an extended community attribute in the route advertisement message.

In some implementations, the processing unit 1001 is also configured to save the association between the network segment address of the destination VTEP, the VNI and second information, where the second information indicates the VXLAN information encapsulation including the VNI. In the IPv6 header of version 6 of the Internet Protocol.

In some implementations, the receiving unit is configured to receive the first message sent by the first communication device through the VXLAN tunnel, the first message includes an IPv6 header, and the IPv6 header includes the VXLAN information; The processing unit 1001 is also configured to match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the second information according to the association relationship; the processing unit 1001 is also configured to Based on the indication of the second information, obtain the VXLAN information from the IPv6 header of the first message; the processing unit 1001 is also configured to strip the IPv6 header of the second message, Obtain the second message; the sending unit 1002 is further configured to forward the second message according to the VXLAN information.

Regarding the specific implementation of each unit of the second communication device 1000, reference may be made to the relevant descriptions of the above method embodiments, and the description will not be repeated this time.

In addition, the embodiment of the present application also provides a communication device 1100, as shown in FIG. 11. FIG. 11 is a schematic structural diagram of a communication device provided by the embodiment of the present application. The communication device 1100 includes a communication interface 1101 and a processor 1102 connected to the communication interface 1101. The communication device 1100 can be used to perform the method 100 in the above embodiment.

In one example, the communication device 1100 can perform the method 100 in the above embodiment. When the communication device 1100 is used to perform the method 100 in the above embodiment, the communication device 1100 is equivalent to the first communication device in the method 100. The communication interface 1101 is used to perform the sending and receiving operations performed by the first communication device in the method 100. The processor 1102 is configured to perform operations other than the sending and receiving operations performed by the first communication device in the method 100. For example: the processor 1102 is used to obtain the first message, which carries VXLAN information through the IPv6 header, and the VXLAN information at least includes VNI; the communication interface Port 1101 is used to send the first message to the second communication device through the VXLAN tunnel. For another example, the communication interface 1101 is used to receive a route advertisement message sent by the second communication device. The route advertisement message includes a route prefix, a next hop, a virtual extended LAN VXLAN network identifier VNI and first information, wherein the second The communication device is used as a destination VTEP, the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the processor 1102 is used to save the network segment of the destination VTEP. The association relationship between the address, the VNI and the second information, the second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the IPv6 header.

In one example, the communication device 1100 can perform the method 100 in the above embodiment. When the communication device 1100 is used to perform the method 100 in the above embodiment, the communication device 1000 is equivalent to the second communication device in the method 100. The communication interface 1101 is used to perform the sending and receiving operations performed by the second communication device in the method 100. The processor 1102 is configured to perform operations other than the sending and receiving operations performed by the second communication device in the method 100. For example: the communication interface 1101 is used to receive the first message sent by the first communication device through the VXLAN tunnel, the first message includes an IPv6 header, the IPv6 header includes VXLAN information, and the VXLAN information includes the VXLAN network identifier VNI, The first communication device is used as a source VTEP; the processor 1102 is used to process the first message according to the VXLAN information. For another example, the processor 1102 is configured to generate a route advertisement message. The route advertisement message includes a route prefix, a next hop, a VXLAN network identifier VNI, and first information, where the next hop is the network segment of the destination VTEP. address, the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the communication interface 1101 is used to send the route advertisement message to the first communication device, and the first communication device serves as the source VTEP.

In addition, the embodiment of the present application also provides a communication device 1200, as shown in FIG. 12. FIG. 12 is a schematic structural diagram of a communication device provided by the embodiment of the present application. The communication device 1200 may be used to perform the method 100 in the above embodiment.

As shown in Figure 12, the communication device 1200 may include a processor 1210, a memory 1220 coupled to the processor 1210, and a transceiver 1230. The transceiver 1230 may be, for example, a communication interface, an optical module, etc. The processor 1210 may be a central processing unit (English: central processing unit, abbreviation: CPU), a network processor (English: network processor, abbreviation: NP) or a combination of CPU and NP. The processor can also be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD can be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD), a field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), a general array logic (English: generic array logic, abbreviation: GAL) or any combination thereof. The processor 1210 may refer to one processor or may include multiple processors. The memory 1220 may include volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM); the memory may also include non-volatile memory (English: non-volatile memory) , such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid-state drive (English: solid-state drive , abbreviation: SSD); the memory 1220 may also include a combination of the above types of memories. The memory 1220 may refer to one memory or may include multiple memories. In one embodiment, computer readable instructions are stored in memory 1220, and the computer The computer-readable instructions include a plurality of software modules, such as a sending module 1221, a processing module 1222 and a receiving module 1223. After executing each software module, the processor 1210 can perform corresponding operations according to the instructions of each software module. In this embodiment, the operations performed by a software module actually refer to operations performed by the processor 1210 according to the instructions of the software module.

In one example, the communication device 1200 can perform the method 100 in the above embodiment. When the communication device 1200 is used to perform the method 100 in the above embodiment, the communication device 1200 is equivalent to the first communication device in the method 100. The transceiver 1230 is used to perform the transceiver operation performed by the first communication device in the method 100. The processor 1210 is configured to perform operations other than the sending and receiving operations performed by the first communication device in the method 100. For example: the processor 1210 is used to obtain a first message, the first message carries VXLAN information through an IPv6 header, and the VXLAN information at least includes VNI; the transceiver 1230 is used to send the first message to the second communication device through a VXLAN tunnel. message. For another example, the transceiver 1230 is configured to receive a route advertisement message sent by the second communication device. The route advertisement message includes a route prefix, a next hop, a virtual extended LAN VXLAN network identifier VNI, and first information, wherein the second The communication device is used as a destination VTEP, the next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the processor 1210 is used to save the network segment of the destination VTEP. The association relationship between the address, the VNI and the second information, the second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the IPv6 header.

In one example, the communication device 1200 can perform the method 100 in the above embodiment. When the communication device 1200 is used to perform the method 100 in the above embodiment, the communication device 1200 is equivalent to the second communication device in the method 100. The transceiver 1230 is used to perform the transceiver operation performed by the second communication device in the method 100. The processor 1210 is configured to perform operations other than the sending and receiving operations performed by the second communication device in the method 100. For example: the transceiver 1230 is configured to receive the first message sent by the first communication device through the VXLAN tunnel, the first message includes an IPv6 header, the IPv6 header includes VXLAN information, and the VXLAN information includes the VXLAN network identifier VNI, The first communication device is used as a source VTEP; the processor 1210 is used to process the first message according to the VXLAN information. For another example, the processor 1210 is configured to generate a route advertisement message, which includes a route prefix, a next hop, a VXLAN network identifier VNI, and first information, where the next hop is the network segment of the destination VTEP. address, the first information indicates that the destination VTEP supports VXLAN encapsulation optimization; the transceiver 1230 is configured to send the route advertisement message to the first communication device, and the first communication device serves as the source VTEP.

The present application also provides a computer-readable storage medium that stores instructions that, when run on a computer, cause the computer to execute the method described in the foregoing embodiments (for example, method 100 ) any one or more operations.

This application also provides a computer program product, which includes a computer program that, when run on a computer, causes the computer to perform any one or more operations in the method (eg, method 100) described in the previous embodiments.

The present application also provides a communication system, including the first communication device and the second communication device mentioned in the method 100 of the above embodiment.

This application also provides a communication system, including at least one memory and at least one processor. The at least one memory stores instructions, and the at least one processor executes the instructions, so that the communication system executes the aforementioned embodiments of the application. Any one or more operations in the method described in any embodiment (eg, method 100).

The terms “first”, “second”, “third” and “fourth” in the description and claims of this application and the above drawings etc. (if present) is used to distinguish similar objects and not necessarily to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus that encompasses a series of steps or units and need not be limited to those explicitly listed. Those steps or elements may instead include other steps or elements not expressly listed or inherent to the process, method, product or apparatus.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical service division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separate. A component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each business unit in various embodiments of this application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above integrated units can be implemented in the form of hardware or software business units.

Integrated units may be stored in a computer-readable storage medium when implemented in the form of software business units and sold or used as independent products. Based on this understanding, the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code. .

Those skilled in the art should realize that in one or more of the above examples, the services described in the present invention can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these services may be stored on or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Storage media can be any available media that can be accessed by a general purpose or special purpose computer.

The above specific embodiments further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention.

Above, the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although referring to the foregoing implementation This application has been described in detail in the examples. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions, This does not make the essence of the corresponding technical solution depart from the scope of the technical solution of each embodiment of the present application.

Claims

A message processing method, characterized in that it is applied to a first communication device, and the first communication device is used as a source virtual extended LAN tunnel end point VTEP. The method includes:

Obtain a first message, the first message includes a sixth version of the Internet Protocol IPv6 header, the IPv6 header includes virtual extended LAN VXLAN information, and the VXLAN information includes a VXLAN network identifier VNI;

The first message is sent to a second communication device through a VXLAN tunnel, and the second communication device serves as a destination VTEP.
The method according to claim 1, characterized in that the IPv6 header includes a destination IPv6 address, and the destination IPv6 address includes the network segment address of the destination VTEP and the VXLAN information.
The method according to claim 2, characterized in that the VXLAN information is carried in the last 64 bits of the destination IPv6 address.
The method according to claim 3, characterized in that all the last 64 bits of the destination IPv6 address are used to carry the VXLAN information.
The method according to claim 1, wherein the IPv6 header includes a source IPv6 address, and the source IPv6 address includes the network segment address of the source VTEP and the VXLAN information.
The method according to claim 5, characterized in that the VXLAN information is carried in the last 64 bits of the source IPv6 address.
The method according to claim 6, characterized in that all the last 64 bits of the source IPv6 address are used to carry the VXLAN information.
The method according to any one of claims 1 to 7, characterized in that the length of the VNI is less than or equal to 24 bits.
The method according to any one of claims 1 to 8, characterized in that the VXLAN information also includes one or more of the following:

At least one flag Flag;

Reserve the Reserve field.
The method according to any one of claims 1-9, characterized in that the method further includes:

Receive a route advertisement message issued by the destination VTEP. The route advertisement message includes a route prefix, a next hop, the VNI and first information, where the next hop is the network segment address of the destination VTEP, so The first information indicates that the destination VTEP supports VXLAN encapsulation optimization;

Save the association between the network segment address of the destination VTEP, the VNI and second information. The second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the IPv6 header to obtain The first message.
The method according to claim 10, characterized in that said saving the association relationship between the network segment address of the destination VTEP, the VNI and the second information includes:

The association relationship between the network segment address of the destination VTEP, the VNI and the second information is saved to the forwarding plane.
The method according to claim 10 or 11, characterized in that the first information is an attribute or an extended community attribute in the route advertisement message.
The method according to any one of claims 10-12, characterized in that the first information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to claim 13, characterized in that:

The mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is an omitted reservation mode, the length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is a simplified compression mode, the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and the M is greater than or an integer equal to 1.
The method according to any one of claims 10 to 14, characterized in that obtaining the first message includes:

Receive the second message;

Match the network segment address of the destination VTEP according to the destination address of the second message, and obtain the VNI and the second information according to the association relationship;

According to the indication of the second information, the second message is encapsulated to obtain the first message.
The method according to any one of claims 10-15, characterized in that the second information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
A message processing method, characterized in that it is applied to a second communication device, and the second communication device is used as a destination virtual extended LAN tunnel end point VTEP. The method includes:

The first message sent by the first communication device is received through the virtual extended LAN VXLAN tunnel. The first message includes the sixth version of the Internet Protocol IPv6 header. The IPv6 header includes VXLAN information. The VXLAN information includes the VXLAN network identifier VNI. , the first communication device serves as the source VTEP;

Process the first message according to the VXLAN information.
The method according to claim 17, characterized in that the IPv6 header includes a destination IPv6 address, and the destination IPv6 address includes the network segment address of the destination VTEP and the VXLAN information.
The method according to claim 18, characterized in that the VXLAN information is carried in the last 64 bits of the destination IPv6 address.
The method according to claim 19, characterized in that all the last 64 bits of the destination IPv6 address are used to carry the VXLAN information.
The method according to claim 17, wherein the IPv6 header includes a source IPv6 address, and the source IPv6 address includes the network segment address of the source VTEP and the VXLAN information.
The method according to claim 21, characterized in that the VXLAN information is carried in the last 64 bits of the source IPv6 address.
The method according to claim 22, characterized in that all the last 64 bits of the source IPv6 address are used to carry the VXLAN information.
The method according to any one of claims 17-23, characterized in that the length of the VNI is less than or equal to 24 bits.
The method according to any one of claims 17-24, characterized in that the VXLAN information further includes one or more of the following:

At least one flag Flag;

Reserve the Reserve field.
The method according to any one of claims 17-25, characterized in that the method further includes:

A route advertisement message issued to the source VTEP. The route advertisement message includes a route prefix, a next hop, the VNI and first information, where the next hop is the network segment address of the destination VTEP. The first information indicates that the destination VTEP supports VXLAN encapsulation optimization.
The method according to claim 26, characterized in that the first information is an attribute or an extended community attribute in the route advertisement message.
The method according to claim 26 or 27, characterized in that the first information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to claim 28, characterized in that:

The mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is an omitted reservation mode, the length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is a simplified compression mode, the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and the M is greater than or an integer equal to 1.
The method according to any one of claims 17-29, characterized in that the method further includes:

Saving the association between the network segment address of the destination VTEP, the VNI and second information, the second information indicating that the VXLAN information including the VNI is encapsulated in the IPv6 header of the first message .
The method according to claim 30, characterized in that the second information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to claim 30 or 31, characterized in that: the said VXLAN information is The first message is processed, including:

Match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the second information according to the association relationship;

Based on the indication of the second information, obtain the VXLAN information from the IPv6 header of the first message;

Strip the IPv6 header of the second message to obtain the second message;

Forward the second message according to the VXLAN information.
A method for route advertisement, characterized in that it is applied to a first communication device that is used as a source virtual extended LAN tunnel endpoint VTEP, and the method includes:

Receive a route advertisement message sent by a second communication device, where the route advertisement message includes a route prefix, a next hop, a virtual extended LAN VXLAN network identifier VNI and first information, wherein the second communication device is used as a destination VTEP, so The next hop is the network segment address of the destination VTEP, and the first information indicates that the destination VTEP supports VXLAN encapsulation optimization;

The association relationship between the network segment address of the destination VTEP, the VNI and second information is saved, and the second information instructs the source VTEP to encapsulate the VXLAN information including the VNI in the sixth version of the Internet Protocol IPv6 header.
The method according to claim 33, characterized in that said saving the association relationship between the network segment address of the destination VTEP, the VNI and the second information includes:

The association relationship between the network segment address of the destination VTEP, the VNI and the second information is saved to the forwarding plane.
The method according to claim 33 or 34, characterized in that the first information is an attribute or an extended community attribute in the route advertisement message.
The method according to any one of claims 33-35, characterized in that the first information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to any one of claims 33 to 36, characterized in that the second information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to claim 36 or 37, characterized in that,

The mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is an omitted reservation mode, the length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is a simplified compression mode, the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and the M is greater than or an integer equal to 1.
The method according to any one of claims 33-38, characterized in that the VXLAN information further includes one or more of the following:

At least one flag Flag;

Reserve the Reserve field.
The method according to any one of claims 33-39, characterized in that the method further includes:

Receive the first message;

Match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the second information according to the association relationship;

According to the instruction of the second information, the first message is encapsulated to obtain a second message, the second message includes a first IPv6 header, the first IPv6 header includes VXLAN information, and the VXLAN The information includes the VNI;

Send the second message to the second communication device through a VXLAN tunnel.
A route advertisement method, characterized in that it is applied to a second communication device, and the second communication device is used as a destination virtual extended LAN tunnel end point VTEP. The method includes:

Generate a route advertisement message, which includes a route prefix, a next hop, a virtual extended LAN VXLAN network identifier VNI, and first information, where the next hop is the network segment address of the destination VTEP, and the third 1. Information indicates that the destination VTEP supports VXLAN encapsulation optimization;

The route advertisement message is sent to a first communications device serving as a source VTEP.
The method according to claim 41, characterized in that the first information is an attribute or an extended community attribute in the route advertisement message.
The method according to claim 41 or 42, characterized in that the first information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to claim 43, characterized in that:

The mode of the VXLAN information is an all-bit mode, the length of the VXLAN information is 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is an omitted reservation mode, the length of the VXLAN information is greater than or equal to 24 bits, and the length of the VXLAN information is less than 64 bits, and the length of the VNI is 24 bits;

Alternatively, the mode of the VXLAN information is a simplified compression mode, the length of the VXLAN information is greater than or equal to M bits, and the length of the VXLAN information is less than 64 bits, the length of the VNI is M bits, and the M is greater than or an integer equal to 1.
The method according to any one of claims 41-44, characterized in that the VXLAN information further includes one or more of the following:

At least one flag Flag;

Reserve the Reserve field.
The method according to any one of claims 41-45, characterized in that the method further includes:

The association relationship between the network segment address of the destination VTEP, the VNI and second information is saved, and the second information indicates that the VXLAN information including the VNI is encapsulated in the IPv6 header of the sixth version of the Internet Protocol.
The method of claim 46, wherein the second information also indicates one or more of the following:

The IPv6 header carries the mode of the VXLAN information;

The length of the VXLAN information;

The length of the VNI.
The method according to claim 46 or 47, characterized in that the method further includes:

Receive the first message sent by the first communication device through the VXLAN tunnel, the first message includes an IPv6 header, and the IPv6 header includes the VXLAN information;

Match the network segment address of the destination VTEP according to the destination address of the first message, and obtain the VNI and the second information according to the association relationship;

Based on the indication of the second information, obtain the VXLAN information from the IPv6 header of the first message;

Strip the IPv6 header of the second message to obtain the second message;

Forward the second message according to the VXLAN information.
A communication device, characterized in that it is applied to a first communication device, and the communication device includes:

transceiver unit and processing unit;

The transceiver unit is used to perform the receiving and/or transmitting operations performed by the first communication device according to any one of claims 1-16 or 33-40;

The processing unit is configured to perform operations other than the receiving and/or sending operations performed by the first communication device according to any one of claims 1-16 or 33-40.
A communication device, characterized in that it is applied to a second communication device, and the communication device includes:

transceiver unit and processing unit;

The transceiver unit is used to perform the receiving and/or transmitting operations performed by the second communication device according to any one of claims 17-32 or 41-48;

The processing unit is configured to perform operations other than the receiving and/or sending operations performed by the second communication device according to any one of claims 17-32 or 41-48.
A communication device, characterized in that the communication device includes a memory and a processor;

The memory is used to store program code;

The processor is configured to run instructions in the program code, so that the communication device executes the method described in any one of claims 1-16 or 33-40.
A communication device, characterized in that the communication device includes a memory and a processor;

The memory is used to store program code;

The processor is configured to run instructions in the program code, so that the communication device performs the method described in any one of claims 17-32 or 41-48.
A communication system, characterized in that the communication system includes a first communication device and a second communication device;

The first communication device is used to perform the method described in any one of the above claims 1-16 or 33-40;

The second communication device is used to perform the method described in any one of claims 17-32 or 41-48.
A computer program product, characterized in that it includes a program, and when the program is run on a processor, the method of any one of claims 1-48 is implemented.
A computer-readable storage medium, characterized in that the computer-readable storage medium includes instructions that, when run on a processor, implement the method described in any one of claims 1-48 above.