CN110830354A - Data forwarding method, device, equipment and storage medium - Google Patents

Abstract

Embodiments of the present invention disclose a data forwarding method, apparatus, device, and storage medium, wherein the method includes: a first device searches a forwarding path table of the first device for a first prefix label associated with a private network address , the forwarding path table of the first device includes one or more private network addresses, and a prefix label associated with each private network address, the first device uses the first prefix label, data content and the private network address. encapsulated into a first data packet, the first device sends the first data packet to a second device corresponding to the first prefix label, the first data packet is used to obtain a second data packet, and the second data packet The text is encapsulated by the second prefix label, the data content and the private network address. The second prefix label is associated with the private network address, which can realize data forwarding between the base station side gateway and the wireless service side gateway.

Description

Data forwarding method, device, device and storage medium

technical field

The present invention relates to mobile communication technologies, and in particular, to a data forwarding method, apparatus, device and storage medium.

Background technique

IP-based wireless access network (Internet Protocol Radio Access Network, IPRAN) is a router/switch integrated solution optimized and customized for IP (Internet Protocol, network protocol) base station backhaul application scenarios. With the continuous advancement of network IP , IPRAN is becoming more and more important for mobile networks. In IPRAN networking, usually the base station side gateway and the wireless service side gateway establish an end-to-end route to realize data forwarding between the base station side gateway and the wireless service side gateway. However, between the base station side gateway and the wireless service side gateway If the destination prefix label is not in the local forwarding path table of the base station-side gateway or wireless service-side gateway when data is forwarded through the prefix label, the data cannot be forwarded, and the user cannot receive the required data. Therefore, how to effectively realize the data forwarding between the base station side gateway and the wireless service side gateway is an urgent problem to be solved at present.

SUMMARY OF THE INVENTION

The present invention provides a data forwarding method, device, equipment and storage medium, which can realize data forwarding between a base station side gateway and a wireless service side gateway by replacing prefix labels.

In a first aspect, an embodiment of the present invention provides a data forwarding method. The method includes: a first device searches a forwarding path table of the first device for a first prefix label associated with a private network address, and the first device's The forwarding path table includes one or more private network addresses and a prefix label associated with each private network address, and the first device encapsulates the first prefix label, data content and the private network address into a first datagram message, the first device sends the first data message to the second device corresponding to the first prefix label, the first data message is used to obtain the second data message, and the second data message is sent by the second prefix label , the data content and the private network address are encapsulated, and the second prefix label is associated with the private network address.

In this technical solution, the first device may search the path forwarding table of the first device for the next hop address (ie, the first prefix label) of the first device reaching the private network address, and combine the first prefix label, the private network address and the The data content to be sent is encapsulated into a first data packet, and the first data packet is sent to the second device corresponding to the first prefix label. The second device can search the forwarding path table of the second device for the second device to reach the private The next hop address of the network address (that is, the second prefix label), replace the first prefix label in the second data packet with the second prefix label to obtain the second data packet, and the second device sends the second data packet To the third device corresponding to the second prefix label, data forwarding between the first device and the third device can be realized by exchanging prefix labels, which can solve the problem that the prefix label of the third device is not in the forwarding path table of the first device. , the problem of forwarding data between the first device and the third device cannot be realized.

Optionally, the first device establishes a first virtual private network neighbor relationship with the second device, the first device receives VPN routing information sent by the second device through the first neighbor relationship, and the routing information includes the first neighbor relationship of the second device. Prefix label, private network address, and RT. If RT is the same as RT in the forwarding path table in the first device, the first device records the first prefix label and the private network address in the forwarding path table in the first device.

In this technical solution, the first device can record the routing information sent by the second device in the forwarding path table of the first device, which can implement segmented IGP routing from the first device to the second device without establishing an end-to-end route , which can reduce the routing volume of the device and reduce the routing pressure of the device, making the IGP deployment scheme more flexible.

In a second aspect, an embodiment of the present invention provides another data forwarding method. The method includes: a second device receives a first data packet sent by a first device to a private network address, parses the first data packet, and obtains The private network address, the first prefix label, and the data content, where the first prefix label is the label of the second device; the second device obtains the second prefix label associated with the private network address, and the second device sends the first data packet The first prefix label is replaced with the second prefix label to obtain the second data packet; and the second data packet is sent to the third device corresponding to the second prefix label.

In the technical solution, the second device receives the first data packet sent by the first device to the private network address, and searches the forwarding path table of the second device for the next hop address of the second device reaching the private network address (ie second prefix label), replace the first prefix label in the second data packet with the second prefix label to obtain the second data packet, and the second device sends the second data packet to the third data packet corresponding to the second prefix label The device can realize data forwarding between the first device and the third device by exchanging prefix labels, which can solve the problem that when the prefix label of the third device is not in the forwarding path table of the first device, the first device and the third device The problem of forwarding data between them cannot be realized.

Optionally, look up the second prefix label associated with the private network address in the forwarding path table of the second device, and the forwarding path table of the second device includes one or more private network addresses and each private network address. the associated prefix label; or the second prefix label is obtained by calculating according to the first prefix label.

In this technical solution, the second device can obtain the second prefix label through the forwarding path table of the second device or calculate according to the first prefix label, so as to send the data content to the third device corresponding to the second prefix label.

Optionally, the second device establishes a second neighbor relationship between the third device and the second device, and receives VPN routing information of the third device sent by the third device through the second neighbor relationship, where the routing information includes the private network address and the second prefix. label, the second device records the VPN routing information of the third device into the forwarding path table of the second device.

In this technical solution, the second device can record the VPN routing information of the third device into the forwarding path table of the second device, so that segmented IGP routes from the first device to the third device can be implemented without establishing an end-to-end Routing can reduce the routing volume of the device and reduce the routing pressure of the device, making the IGP deployment scheme more flexible.

Optionally, the second device establishes the first neighbor relationship between the first device and the second device, replaces the second prefix label in the VPN routing information of the third device with the first prefix label of the second device, and obtains the modified VPN routing information, the modified VPN routing information is sent to the first device through the first neighbor relationship, and the modified VPN routing information is used to match the routing target RT with the RT in the forwarding path table of the first device. At the same time, the first device records the first prefix label and the private network address in the forwarding path table of the first device.

In the technical solution, the second device can replace the second prefix label in the VPN routing information of the third device with the first prefix label of the second device, obtain the modified routing information, and send the modified routing information to the third device. One device can implement segmented IGP routing from the first device to the second device without establishing an end-to-end route, which can reduce the routing volume of the device and reduce the routing pressure of the device, making the IGP deployment scheme more flexible.

Optionally, the second device receives a label configuration request for the second device, and the configuration request carries the label of the switching type; the second device uses the label of the switching type as the first prefix label, and configures the second device according to the first prefix label. to configure.

In this technical solution, the second device can configure a switch type label for the second device, so as to implement segmented IGP routing between the first device and the second device, and to implement segmentation between the second device and the third device IGP routing.

In a third aspect, an embodiment of the present invention provides a data forwarding apparatus, and the apparatus includes:

A search module, configured to search for a first prefix label associated with a private network address in a forwarding path table of the first device, where the forwarding path table of the first device includes one or more private network addresses, and The prefix label associated with each private network address.

An encapsulation module, configured to encapsulate the first prefix label, data content and the private network address into a first data packet.

a sending module, configured to send the first data packet to the second device corresponding to the first prefix label, where the first data packet is used to obtain a second data packet, the second data packet It is obtained by encapsulating the second prefix label, the data content and the private network address, and the second prefix label is associated with the private network address.

In a fourth aspect, an embodiment of the present invention provides another data forwarding apparatus, the apparatus comprising:

The receiving module is configured to receive the first data message sent by the first device to the private network address.

A parsing module, configured to parse the first data packet to obtain the private network address, a first prefix label, and data content, where the first prefix label is a label of the second device.

an obtaining module, configured to obtain the second prefix label associated with the private network address.

A replacement module, configured to replace the first prefix label in the first data packet with the second prefix label to obtain a second data packet; and send the second data packet to the second prefix The third device corresponding to the label.

In a fifth aspect, an embodiment of the present invention provides a network device, the network device includes at least one processor, a memory, and instructions stored in the memory and executable by the at least one processor, characterized in that: The at least one processor executes the instructions to implement the data forwarding method described in the first aspect.

In a sixth aspect, an embodiment of the present invention provides another network device, the network device includes at least one processor, a memory, and instructions stored in the memory and executable by the at least one processor, characterized in that , the at least one processor executes the instructions to implement the data forwarding method according to the second aspect of the claim.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, wherein the computer storage medium stores a computer program, and the computer program includes program instructions, and the program instructions are executed by a processor. The processor is made to implement the data forwarding method described in the first aspect and the second aspect.

In an eighth aspect, an embodiment of the present invention provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to implement The data forwarding methods described in the first aspect and the second aspect.

Description of drawings

In order to describe the technical solutions in the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments of the present invention will be described below.

1 is a schematic structural diagram of a data forwarding system provided by an embodiment of the present invention;

2 is a schematic flowchart of a data forwarding method according to an embodiment of the present invention;

3 is a schematic structural diagram of another data forwarding system provided by an embodiment of the present invention;

4 is a schematic structural diagram of another data forwarding system provided by an embodiment of the present invention;

5 is a schematic structural diagram of a data forwarding apparatus provided by an embodiment of the present invention;

6 is a schematic structural diagram of another data forwarding apparatus provided by an embodiment of the present invention;

7 is a schematic structural diagram of a network device provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention.

Detailed ways

The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

The forwarding device in this embodiment of the present invention may refer to a switch, a router, or other network devices, the control plane device may refer to a controller, the controller may refer to a server, and may also refer to other devices.

In order to better understand the data forwarding method, apparatus, and device provided by the embodiments of the present invention, the system architecture of the embodiments of the present invention is first described below.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of the architecture of a data forwarding system provided by an embodiment of the present invention. The architecture of the data forwarding system may include a first device, a second device, and a third device. In one embodiment, the first device One device may be a Radio Service Gateway (RSG), the second device may be an Aggregation Site Gateway (ASG), and the third device may be a Cell Site Gateway (CSG). In another embodiment, the first device may be a base station side gateway, the second device may be an aggregation side gateway, and the third device may be a wireless service side gateway. Among them, the RSG is used to connect the operator's central computer room; the ASG is used to aggregate the network traffic of the access layer; the CSG refers to the access ring equipment, which is used to connect the wireless base station and the enterprise's outdoor wireless gateway (Customer Premises Equipment, CPE).

In FIG. 1 , the first device is the RSG, the second device is the ASG, and the third device is the CSG. Based on the data forwarding system, a data forwarding method according to an embodiment of the present invention can be implemented. Specifically, the RSG sends the data to the CSG. When sending data, the RSG can look up the first prefix label associated with the private network address of the CSG from the forwarding path table of the RSG, and encapsulate the first prefix label, the private network address, and the data content to be sent into a first data packet, and The first data packet is sent to the second device (ie, the ASG) corresponding to the first prefix label. When the ASG receives the second data packet, it searches the forwarding path table of the ASG for the second prefix label associated with the private network address, and replaces the first prefix label of the first data packet with the second prefix label to obtain the first prefix label. Two data packets, send the second data packet to the third device (ie CSG) corresponding to the second prefix label, the CSG receives the second data packet, determines that the private network address is the same as the private network address of the CSG, and determines that the private network address is the same as that of the CSG. The second data packet is sent to the CSG. The data forwarding between the CSG and the RSG can be realized by exchanging prefix labels, which can solve the problem that the data content cannot be forwarded when the destination private network address is not in the forwarding path table of the RSG.

Based on the above description of the architecture of a data forwarding system, an embodiment of the present invention provides a data forwarding method. Please refer to FIG. 2. The method is applied to the data forwarding system shown in FIG. 1. The system includes a first device, a second Second device and third device, the method includes:

S101. The second device establishes a second neighbor relationship between the third device and the second device.

In order to receive the virtual private network (Virtual Private Network, VPN) routing information of the third device, the second device establishes a second neighbor relationship between the third device and the second device, and the second neighbor relationship may be actively established by the second device , or it can be passively established by the second device.

In one embodiment, the second neighbor relationship may be actively established by the second device. The second device may send a request for establishing a second neighbor relationship to the third device, where the request includes attribute information of the second device, and the third device receives the request and sends feedback information to the second device, if the feedback information includes the first The attribute information of the second device and the attribute information of the third device indicate that the second neighbor relationship between the third device and the second device is successfully established.

The second neighbor relationship may refer to an IPv6-based internal border gateway protocol (Internal Border Gateway Protocol, IBGP) peer relationship, and the attribute information may include device identifiers and the like.

For example, as shown in FIG. 3 , the first device is the RSG, the second device is the ASG, and the third device is the CSG. The ASG may send a request for establishing a second neighbor relationship to the CSG, where the request includes the device identifier of the ASG, and the CSG receives the request. The request is received, and feedback information is sent to the ASG. If the feedback information includes the device ID of the CSG and the device ID of the ASG, the CSG and the ASG successfully establish the IBGP peer relationship.

In another embodiment, the second neighbor relationship may be passively established by the second device. The third device may send a request for establishing a second neighbor relationship to the second device, where the request includes attribute information of the third device, and the second device receives the request and sends feedback information to the third device, if the feedback information includes the first The attribute information of the second device and the attribute information of the third device indicate that the second neighbor relationship between the third device and the second device is successfully established.

S102. The third device sends VPN routing information of the third device to the second device through the second neighbor relationship, where the routing information includes the private network address and the second prefix label.

The second device and the third device may belong to the same Interior Gateway Protocol (IGP) domain. In order to implement segmented IGP routing between the second device and the third device, the third device may convert the Loopback ( The loopback interface (that is, the private network address) route is imported to the second device, that is, the third device sends the VPN routing information of the third device to the second device. Specifically, the third device sends the second device to the second device through the second neighbor The relationship sends VPN routing information of the third device, where the routing information includes the private network address and the second prefix label. At this time, the second device can view the Loopback IP of the third device, and the segmented IGP route from the second device to the third device is implemented, that is, the segmented IPv6 routing (IPv6 Segment Routing, SRv6) tunnel from the second device to the third device is opened. If the segmented SRv6 tunnel is opened, it means that the second device can send data to the third device according to the routing information of the third device, that is, send data to the third device through the Loopback IP of the third device.

Before step S102, the method further includes: the third device receives a label configuration request to the third device, and the configuration request carries the endpoint label; the third device uses the endpoint label as the second prefix label, and configures the third device according to the second prefix label .

In order to implement segmented IGP routing, the user can configure the third device, and the third device receives a label configuration request for the third device, and the configuration request carries the endpoint label; the third device uses the endpoint label as the second prefix label, according to the The second prefix label configures the third device, and the device that establishes a neighbor relationship with the third device can send data to the third device according to the second prefix label.

The endpoint label may refer to an endpoint label of a backbone network edge router (Provider Edge Router, PE) type.

S103. The second device records the VPN routing information of the third device into the forwarding path table of the second device.

The second device may receive the VPN routing information of the third device, and record the VPN routing information of the third device in the forwarding path table of the second device by the second device. The forwarding path table of the second device includes one or more private network addresses, and a prefix label associated with each private network address. The label associated with the private network address may refer to the next hop The next hop address of the private network address (that is, the third device).

For example, as shown in Figure 3, the private network address of the CSG is 80.81.1.0, the second prefix label is 2001:1::FF:FF29, the ASG receives the routing information of the CSG, and records the routing information of the CSG to the ASG's In the forwarding path table, the ASG can describe the forwarding path table of the ASG in the form of a table, as shown in Table 1. In Table 1, 2001:1::FF:FF29 refers to the second prefix label, and 80.81.1.0 refers to the private web address.

Table 1:

prefix tag 2001:1::FF:FF29 private network address 80.81.1.0

S104. The second device establishes a first neighbor relationship between the first device and the second device.

In order to forward the VPN routing information of the third device to the first device, the second device may establish a first neighbor relationship between the first device and the second device. The first neighbor relationship may be actively established by the second device, or it may be is passively established by the second device.

In one embodiment, the first neighbor relationship may be actively established by the second device. The second device may send a request for establishing a first neighbor relationship to the first device, where the request includes attribute information of the second device, and the first device receives the request and sends feedback information to the second device, if the feedback information includes the first device The attribute information of the second device and the attribute information of the first device indicate that the first neighbor relationship between the first device and the second device is successfully established.

For example, as shown in FIG. 3 , the ASG may send a request for establishing a second neighbor relationship to the RSG, where the request includes attribute information of the ASG, and the RSG receives the request and sends feedback information to the ASG, if the feedback information includes the RSG attribute information and the attribute information of the ASG, the RSG and the ASG successfully establish the IBGP peer relationship.

In another embodiment, the first neighbor relationship may be passively established by the second device. The first device may send a request for establishing a first neighbor relationship to the second device, where the request includes attribute information of the first device, and the second device receives the request and sends feedback information to the first device, if the feedback information includes the first device. The attribute information of the second device and the attribute information of the first device indicate that the first neighbor relationship between the first device and the second device is successfully established.

Wherein, the first neighbor relationship may refer to an IPv6-based IBGP peer relationship, and the attribute information may include a device identifier and the like.

S105. The second device replaces the second prefix label in the VPN routing information of the third device with the first prefix label of the second device to obtain modified VPN routing information.

Before step S105, the method further includes: the second device receives a label configuration request to the second device, and the configuration request carries the label of the switching type; the second device uses the label of the switching type as the first prefix label, and configures the second device according to the first prefix label device to configure.

In order to implement segmented IGP routing, the user can configure the second device, the second device receives a label configuration request to the second device, the configuration request carries the label of the switching type, and the second device uses the label of the switching class as the first prefix label , the second device is configured according to the first prefix label, and the device that establishes a neighbor relationship with the second device can send data to the second device according to the first prefix label.

The label of the interaction type may refer to the transit-vpn address of the virtual private network configured under the VPN instance, or a defined label end-sw sid for switching.

S106. The second device sends the modified VPN routing information to the first device through the first neighbor relationship, and the modified VPN routing information is used for the forwarding path table between the routing target RT and the first device. When the RTs are the same, the first device records the first prefix label and the private network address in the forwarding path table of the first device.

The first device and the second device may belong to the same IGP domain. In order to implement segmented IGP routing between the first device and the second device, the second device may import the modified routing information to the first device. , the second device sends the modified VPN routing information to the first device through the first neighbor relationship, where the modified routing information includes the private network address and the first prefix label. The segmented IGP route from the second device to the first device is implemented, that is, the segmented SRv6 tunnel from the first device to the second device is opened, and the segmented SRv6 tunnel is opened, which means that the next hop from the first device to the third device is second device.

S107. When the route target (Route-Target, RT) is the same as the RT in the forwarding path table of the first device, the first device records the first prefix label and the private network address in the forwarding path table of the first device.

The first device receives the modified routing information, and compares the RT value in the modified routing information with the RT value in the forwarding path table in the first device. If they are not the same, it indicates that the data published by the third device is not. If required by the first device, the first device may not record the private network address and the first prefix label; if they are the same, it indicates that the data published by the third device is required by the first device, and the first device may record the private network address and the first prefix label. The first prefix label is recorded in the forwarding path table of the first device.

For example, if the first prefix label is 2001:2::41, if the RT value in the modified routing information is the same as the RT value in the forwarding path table of the RSG, the RSG records the modified routing information in the forwarding path of the RSG. In the table, the RSG may describe the forwarding path table of the RSG in the form of a table, as shown in Table 2. In Table 2, 2001:2::41 refers to the first prefix label, and 80.81.1.0 refers to the private network address.

Table 2:

prefix tag 2001:2::41 private network address 80.81.1.0

S108. The first device searches the forwarding path table of the first device for the first prefix label associated with the private network address.

When the first device needs to send data to the third device corresponding to the private network address, the first device may look up the first prefix label associated with the private network address in the forwarding path table of the first device, and the first prefix label may be Refers to the next hop address to the third device corresponding to the private network address. For the first device, the first device can use the first prefix label as the destination address.

S109. The first device encapsulates the first prefix label, the data content, and the private network address into a first data packet.

The first device can encapsulate the first prefix label, the data content and the private network address into a first data packet, and specifically, encapsulate the first prefix label, the data content, that is, the private network address, into the first data packet according to the format of the IPv6 packet. message.

For example, as shown in Figure 4, in the data forwarding system, the first device is the RSG, the second device is the ASG, and the third device is the CSG. Assuming that the private network address is 80.81.1.0, the RSG can search the table according to the private network address. In the forwarding path table of the RSG shown in 2, the first prefix label associated with the private network address is obtained. The first prefix label is 2001:2::41, and the RSG encapsulates 2001:2::41, data content and 80.81.1.0 into the first data packet.

S110. The first device sends the first data packet to the second device corresponding to the first prefix label.

S111. The second device parses the first data packet to obtain a private network address, a first prefix label, and data content, where the first prefix label is a label of the second device.

The second device receives the first data packet, and parses the first data packet to obtain the private network address, the first prefix label, and the data content.

S112. Acquire a second prefix label associated with the private network address.

In order to forward the data content segments to the third device corresponding to the second prefix label, the terminal may acquire the second prefix label associated with the private network address.

Step S112 includes: the second device searches a forwarding path table of the second device for a second prefix label associated with the private network address, where the forwarding path table of the second device includes one or more private networks address, and a prefix label associated with each private network address; or the second device calculates and obtains the second prefix label according to the first prefix label.

For example, as shown in FIG. 4 , the RSG sends the first data packet to the ASG corresponding to the first prefix label, and the ASG parses the first data packet to obtain the private network address, the first prefix flag and the data content, The second prefix label associated with the first prefix label is searched in the forwarding path table of the ASG as shown in Table 1, where the second prefix label is 2001:1::FF:FF29.

For another example, the serial number opcode may be configured for the second setting in advance, and the second device may obtain the first prefix label by calculating according to the second prefix label, that is, adding the serial number to the first prefix label to obtain the second prefix label.

Among them, since the amount of routes on the second device is particularly large, if a serial number is configured for each route, it will bring greater storage pressure and calculation pressure to the second device. In order to reduce the pressure on the second device, the peer-based to configure the serial number.

S113. The second device replaces the first prefix label in the first data packet with a second prefix label to obtain a second data packet; and sends the second data packet to a third device corresponding to the second prefix label .

In steps S112-S113, in order to send the data content to the third device, the second device searches the forwarding path table of the second device for the second prefix label associated with the private network address, and converts the first prefix in the first data packet to the second prefix label associated with the private network address. A prefix label is replaced with a second prefix label to obtain a second data packet, and the second data packet is sent to the third device corresponding to the second prefix label. The third device receives the second data packet and sends the second data packet to the second data packet. The private network address in the packet is compared with the private network address of the third device. If the comparison result determines that the private network address in the second data packet is the same as the private network address of the third device, the third device parses the second data packet. The data message gets the data content.

For example, as shown in Figure 4, the ASG performs prefix label exchange. Specifically, the ASG replaces 2001:2::41 (the first prefix label) in the first data packet with 2001:1::FF:FF29 (Second prefix label), obtain the second data packet, send the second data packet to the CSG, and the CSG parses the second data packet to obtain the data content.

In the embodiment of the present invention, the third device sends the routing information of the third device to the second device, and the second device records the routing information of the third device in the forwarding path table in the second device, so that the first device to the second device is realized. The segmented IGP route of the three devices does not need to establish an end-to-end route, which can reduce the routing volume of the device and reduce the routing pressure of the device, making the IGP deployment scheme more flexible. The second device labels the second prefix in the third device Replace with the first prefix label, obtain the modified routing information, send the modified routing information to the first device, and the first device records the modified routing information in the forwarding path table of the first device, which can realize the first The segmented IGP route from the device to the second device does not need to establish an end-to-end route, which can reduce the routing volume of the device and reduce the routing pressure of the device, making the IGP deployment scheme more flexible. In addition, the first device may look up the first prefix label associated with the private network address from the forwarding path table of the first device, and encapsulate the first prefix label, the private network address, and the data content to be sent into a first data packet, Send the first data packet to the second device corresponding to the first prefix label. When receiving the second data packet, the second device obtains the second prefix label associated with the private network address, and replaces the first prefix label of the first data packet with the second prefix label to obtain the second data packet, Send the second data packet to the third device corresponding to the second prefix label, the third device receives the second data packet, determines that the private network address is the same as the private network address of the third device, and determines the second data packet is sent to a third device. When the prefix label of the destination private network address (that is, the prefix label of the third device) is not in the forwarding path table of the first device, the data content can be forwarded by exchanging prefix labels, which can solve the problem when the destination private network address is not in the first device's forwarding path table. When the forwarding path table of a device is used, the data content cannot be forwarded.

Please refer to FIG. 5 , which is a schematic structural diagram of a data forwarding apparatus according to an embodiment of the present invention, where the data forwarding apparatus is the first device in the embodiment shown in FIG. 2 . The data forwarding apparatus described in this embodiment is applied to network equipment, and the apparatus includes:

A search module 501, configured to search for a first prefix label associated with a private network address in a forwarding path table of the first device, where the forwarding path table of the first device includes one or more private network addresses, and The prefix label associated with each private network address.

The encapsulation module 502 is configured to encapsulate the first prefix label, the data content and the private network address into a first data packet.

A sending module 503, configured to send the first data packet to a second device corresponding to the first prefix label, where the first data packet is used to obtain a second data packet, the second data packet The text is obtained by encapsulating the second prefix label, the data content and the private network address, and the second prefix label is associated with the private network address.

Optionally, the establishing module 504 is configured to establish a first virtual private network neighbor relationship with the second device.

Optionally, the receiving module 505 is configured to receive VPN routing information sent by the second device through the first neighbor relationship, where the routing information includes the first prefix label of the second device, the private network address and RT.

Optionally, the recording module 506 is configured to record the first prefix label and the private network address in the first device if the RT is the same as the RT in the forwarding path table in the first device. in the forwarding path table in the device.

In this embodiment of the present invention, the first device may look up the first prefix label associated with the private network address from the forwarding path table of the first device, and encapsulate the first prefix label, the private network address, and the data content to be sent into the first prefix label, the private network address, and the data content to be sent. data packet, sending the first data packet to the second device corresponding to the first prefix label. When the second device receives the second data packet, it searches the routing table of the second device for the second prefix label associated with the private network address, and replaces the first prefix label of the first data packet with the second prefix label. Prefix label, obtain the second data packet, send the second data packet to the third device corresponding to the second prefix label, the third device receives the second data packet, and determines the private network address and the private network of the third device. The addresses are the same, and it is determined that the second data packet is sent to the third device. When the prefix label of the destination private network address (that is, the prefix label of the third device) is not in the forwarding path table of the first device, the data content can be forwarded by exchanging prefix labels, which can solve the problem when the destination private network address is not in the first device's forwarding path table. When the forwarding path table of a device is used, the data content cannot be forwarded.

Referring to FIG. 6 , it is a schematic structural diagram of another data forwarding apparatus according to an embodiment of the present invention, where the data forwarding apparatus is the second device in the embodiment shown in FIG. 2 . The data forwarding apparatus described in this embodiment is applied to network equipment, and the apparatus includes:

The receiving module 601 is configured to receive a first data packet sent by the first device to a private network address.

The parsing module 602 is configured to parse the first data packet to obtain the private network address, a first prefix label, and data content, where the first prefix label is a label of the second device.

The obtaining module 603 is configured to obtain the second prefix label associated with the private network address.

A replacement module 604, configured to replace the first prefix label in the first data packet with the second prefix label to obtain a second data packet; and send the second data packet to the second data packet The third device corresponding to the prefix label.

Optionally, the obtaining module 603 is specifically configured to look up the second prefix label associated with the private network address in the forwarding path table of the second device, where the forwarding path table of the second device includes a or more than one private network address, and a prefix label associated with each private network address; or the second prefix label is obtained by calculating according to the first prefix label.

Optionally, the establishing module 605 is configured to establish a second neighbor relationship between the third device and the second device.

Optionally, the receiving module 601 is further configured to receive VPN routing information of the third device sent by the third device through the second neighbor relationship, where the routing information includes the private network address and all Describe the second prefix tag.

Optionally, the recording module 606 is configured to record the VPN routing information of the third device into the forwarding path table of the second device.

Optionally, the establishing module 605 is further configured to establish a first neighbor relationship between the first device and the second device.

Optionally, the replacement module 604 is further configured to replace the second prefix label in the VPN routing information of the third device with the first prefix label of the second device to obtain the modified VPN routing information.

Optionally, the sending module 607 is configured to send the modified VPN routing information to the first device through the first neighbor relationship, where the modified VPN routing information is used for the routing target RT. When the RT is the same as the RT in the forwarding path table of the first device, the first device records the first prefix label and the private network address in the forwarding path table of the first device.

Optionally, the receiving module 601 is configured to receive a label configuration request to the second device, where the configuration request carries a label of a switching type.

Optionally, the configuration module 608 is configured to use the label of the switching class as the first prefix label, and configure the second device according to the first prefix label.

In this embodiment of the present invention, the first device may look up the first prefix label associated with the private network address from the forwarding path table of the first device, and encapsulate the first prefix label, the private network address, and the data content to be sent into the first prefix label, the private network address, and the data content to be sent. data packet, sending the first data packet to the second device corresponding to the first prefix label. When receiving the second data packet, the second device obtains the second prefix label associated with the private network address, and replaces the first prefix label of the first data packet with the second prefix label to obtain the second data packet, Send the second data packet to the third device corresponding to the second prefix label, the third device receives the second data packet, determines that the private network address is the same as the private network address of the third device, and determines the second data packet is sent to a third device. When the prefix label of the destination private network address (that is, the prefix label of the third device) is not in the forwarding path table of the first device, the data content can be forwarded by exchanging prefix labels, which can solve the problem when the destination private network address is not in the first device's forwarding path table. When the forwarding path table of a device is used, the data content cannot be forwarded.

Please refer to FIG. 7 , which is a schematic structural diagram of a network device according to an embodiment of the present invention. The network device may refer to the first device in the foregoing embodiment, and the network device includes: a processor 701 , a memory 702 , and a communication interface 703 and a power supply 704, the processor 701, the memory 702, the communication interface 703 and the power supply 704 are connected to each other through a bus.

The processor 701 may be one or more CPUs, and in the case where the processor 701 is one CPU, the CPU may be a single-core CPU, or a multi-core CPU, the processor 701 .

The memory 702 includes, but is not limited to, RAM, ROM), EPROM, CD-ROM, and is used to store instructions, operating systems, various applications, and data.

The above-mentioned communication interface 703 is connected to other network devices. For example, the communication interface 703 includes a plurality of interfaces, which are respectively connected with a plurality of network devices. Communication interface 703 may be a wired interface, a wireless interface, or a combination thereof. The wired interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface or a combination thereof. For example, the wireless interface may be a wireless local area network (English: wireless local area network, abbreviation: WLAN) interface, a cellular network interface or a combination thereof.

The power supply 704 is used to supply power to the network device.

The aforementioned memory 702 is also used to store program instructions. The above-mentioned processor 701 may call the program instructions stored in the above-mentioned memory 702 to implement the data forwarding methods shown in the above-mentioned embodiments of the present application.

Based on the same inventive concept, the principle of solving the problem of the network device provided in the embodiment of the present invention is similar to that of the method embodiment of the present invention. Therefore, the implementation and beneficial effects of the network device can be referred to and the beneficial effects. For the sake of brevity, they will not be repeated here. .

Please refer to FIG. 8 , which is a schematic structural diagram of a network device according to an embodiment of the present invention, where the network device may refer to the second device in the foregoing embodiment. The network device includes a processor 801, a memory 802, a communication interface 803 and a power supply 804, and the processor 801, the memory 802, the communication interface 803 and the power supply 804 are connected to each other through a bus.

The processor 801 may be one or more CPUs. In the case where the processor 801 is one CPU, the CPU may be a single-core CPU or a multi-core CPU, the processor 801 .

The memory 802 includes, but is not limited to, RAM, ROM), EPROM, and CD-ROM, and the memory 802 is used to store instructions, operating systems, various applications, and data.

The above-mentioned communication interface 803 is connected to the network device. For example, the communication interface 803 includes a plurality of interfaces, which are respectively connected with a plurality of terminals or with a forwarding plane device. Communication interface 803 may be a wired interface, a wireless interface, or a combination thereof. The wired interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface or a combination thereof. For example, the wireless interface may be a wireless local area network (English: wireless local area network, abbreviation: WLAN) interface, a cellular network interface or a combination thereof.

The power supply 804 is used to supply power to the control plane device.

The above-mentioned memory 802 is also used to store program instructions. The above-mentioned processor 801 may call the program instructions stored in the above-mentioned memory 802 to implement the data forwarding methods shown in the above-mentioned embodiments of the present application.

Based on the same inventive concept, the principle of solving the problem of the network device provided in the embodiment of the present invention is similar to that of the method embodiment of the present invention. Therefore, the implementation and beneficial effects of the network device can be referred to and the beneficial effects are not described here for brevity. Repeat.

The present invention also provides a computer-readable storage medium on which a computer program is stored. For the implementation and beneficial effects of the program for solving problems, reference may be made to the above-mentioned implementation and beneficial effects of the data forwarding method in FIG. 2 . Repeat.

The implementation of the present invention also provides a computer program product, the computer program product includes a non-volatile computer-readable storage medium storing a computer program, and when the computer program is executed, the computer executes the data in the above-mentioned embodiment corresponding to FIG. 2 . For the steps of the forwarding method, the implementation manner and beneficial effect of the computer program product for solving the problem, reference may be made to the implementation manner and beneficial effect of the data packet processing method in FIG.

Those of ordinary skill in the art can understand that all or part of the process in the method of the above embodiment can be implemented by instructing the relevant hardware through a computer program, and the above program can be stored in a computer-readable storage medium, and the program is in During execution, it may include the processes of the embodiments of the above-mentioned methods.

Claims (18)

1. a data forwarding method, is characterized in that, described method comprises: The first device looks up the first prefix label associated with the private network address in the forwarding path table of the first device, where the forwarding path table of the first device includes one or more private network addresses, and is associated with each private network address. The prefix label associated with the private network address; The first device encapsulates the first prefix label, the data content and the private network address into a first data packet; The first device sends the first data packet to the second device corresponding to the first prefix label, where the first data packet is used to obtain a second data packet, and the second data packet It is obtained by encapsulating the second prefix label, the data content and the private network address, and the second prefix label is associated with the private network address. 2. The method according to claim 1, wherein the forwarding path table of the first device further includes a routing target Route-Target, and the first device searches the forwarding path table of the first device for Before the first prefix label associated with the private network address, it also includes: establishing, by the first device, a first virtual private network neighbor relationship with the second device; The first device receives virtual private network routing information sent by the second device through the first neighbor relationship, where the routing information includes the first prefix label of the second device, the private network address, and RT; If the RT is the same as the RT in the forwarding path table in the first device, the first device records the first prefix label and the private network address in the forwarding path in the first device in the table. 3. A data forwarding method, wherein the method comprises: The second device receives the first data packet sent by the first device to the private network address; The second device parses the first data packet to obtain the private network address, a first prefix label, and data content, where the first prefix label is a label of the second device; obtaining, by the second device, a second prefix label associated with the private network address; The second device replaces the first prefix label in the first data packet with the second prefix label to obtain a second data packet; and sends the second data packet to the second prefix The third device corresponding to the label. 4. The method according to claim 3, wherein obtaining, by the second device, a second prefix label associated with the private network address, comprising: The second device looks up the second prefix label associated with the private network address in the forwarding path table of the second device, where the forwarding path table of the second device includes one or more private network addresses, and The prefix label associated with each private network address; Or the second device calculates and obtains the second prefix label according to the first prefix label. 5. The method according to claim 3, wherein the second device parses the first data packet to obtain the private network address, the first prefix label, and the data content, and the first Before a prefix label is the label of the second device, it further includes: establishing, by the second device, a second neighbor relationship between the third device and the second device; receiving, by the second device, VPN routing information of the third device sent by the third device through the second neighbor relationship, where the routing information includes the private network address and the second prefix label; The second device records the VPN routing information of the third device into the forwarding path table of the second device. 6 . The method according to claim 5 , wherein the VPN routing information of the third device further includes a routing target RT, and the VPN routing information of the third device is recorded in the second device. 7 . After the forwarding path table, it also includes: establishing, by the second device, a first neighbor relationship between the first device and the second device; The second device replaces the second prefix label in the VPN routing information of the third device with the first prefix label of the second device to obtain the modified VPN routing information; The second device sends the modified VPN routing information to the first device through the first neighbor relationship, where the modified VPN routing information is used to communicate between the routing target RT and the first device. When the RTs in the forwarding path table of the device are the same, the first device records the first prefix label and the private network address in the forwarding path table of the first device. 7. The method according to any one of claims 3-6, further comprising: receiving, by the second device, a label configuration request to the second device, where the configuration request carries a switch-type label; The second device uses the label of the switching class as the first prefix label, and configures the second device according to the first prefix label. 8. A data forwarding device, wherein the device comprises: A search module, configured to search for a first prefix label associated with a private network address in a forwarding path table of the first device, where the forwarding path table of the first device includes one or more private network addresses, and The prefix label associated with each private network address; an encapsulation module, configured to encapsulate the first prefix label, data content and the private network address into a first data packet; a sending module, configured to send the first data packet to the second device corresponding to the first prefix label, where the first data packet is used to obtain a second data packet, the second data packet It is obtained by encapsulating the second prefix label, the data content and the private network address, and the second prefix label is associated with the private network address. 9. The apparatus according to claim 8, wherein the forwarding path table of the first device further comprises a routing target RT, and the apparatus further comprises: establishing a module for establishing a first virtual private network neighbor relationship with the second device; a receiving module, configured to receive VPN routing information sent by the second device through the first neighbor relationship, where the routing information includes the first prefix label of the second device, the private network address, and RT; A recording module, configured to record the first prefix label and the private network address to the forwarding path in the first device if the RT is the same as the RT in the forwarding path table in the first device in the table. 10. A data forwarding device, characterized in that the device comprises: a receiving module, configured to receive the first data message sent by the first device to the private network address; a parsing module, configured to parse the first data packet to obtain the private network address, a first prefix label, and data content, where the first prefix label is a label of the second device; an obtaining module for obtaining the second prefix label associated with the private network address; Look up the second prefix label associated with the private network address in the forwarding path table of the second device, where the forwarding path table of the second device includes one or more private network addresses, and each private network address is associated with The prefix label associated with the network address; A replacement module, configured to replace the first prefix label in the first data packet with the second prefix label to obtain a second data packet; and send the second data packet to the second prefix The third device corresponding to the label. 11. The apparatus of claim 10, comprising: The obtaining module is specifically configured to look up the second prefix label associated with the private network address in the forwarding path table of the second device, where the forwarding path table of the second device includes one or more private network addresses. network addresses, and prefix labels associated with each private network address; Or the second prefix label is obtained by calculating according to the first prefix label. 12. The apparatus of claim 10, wherein: The device also includes: establishing a module for establishing a second neighbor relationship between the third device and the second device; The receiving module is further configured to receive VPN routing information of the third device sent by the third device through the second neighbor relationship, where the routing information includes the private network address and the second prefix label ; A recording module, configured to record the VPN routing information of the third device into the forwarding path table of the second device. 13. The apparatus of claim 12, wherein The establishing module is further configured to establish a first neighbor relationship between the first device and the second device; The replacement module is further configured to replace the second prefix label in the VPN routing information of the third device with the first prefix label of the second device to obtain the modified VPN routing information; The device also includes: A sending module, configured to send the modified VPN routing information to the first device through the first neighbor relationship, where the modified VPN routing information is used to communicate between the routing target RT and the first device When the RTs in the forwarding path table of the device are the same, the first device records the first prefix label and the private network address in the forwarding path table of the first device. 14. The device according to any one of claims 10-13, characterized in that, The receiving module is configured to receive a label configuration request to the second device, where the configuration request carries a switch type label; The device also includes: A configuration module, configured to use the label of the switching class as the first prefix label, and configure the second device according to the first prefix label. 15. A network device, the network device comprising at least one processor, a memory, and instructions stored on the memory and executable by the at least one processor, wherein the at least one processor executes the to implement the steps of the data forwarding method according to any one of claims 1 or 2. 16. A network device, the network device comprising at least one processor, a memory, and instructions stored on the memory and executable by the at least one processor, wherein the at least one processor executes the to execute the steps of the data forwarding method according to any one of claims 3 to 7. 17. A computer-readable storage medium, wherein the computer storage medium stores a computer program, the computer program comprising program instructions, the program instructions, when executed by a processor, cause the processor to execute as claimed The steps of the data forwarding method of any one of requirements 1 to 7 are required. 18. A computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to execute any one of claims 1 to 7 The steps of the data forwarding method described in item.

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