CN110830354A - Data forwarding method, device, equipment and storage medium - Google Patents
Data forwarding method, device, equipment and storage medium Download PDFInfo
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- CN110830354A CN110830354A CN201810899867.3A CN201810899867A CN110830354A CN 110830354 A CN110830354 A CN 110830354A CN 201810899867 A CN201810899867 A CN 201810899867A CN 110830354 A CN110830354 A CN 110830354A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/54—Organization of routing tables
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Abstract
The embodiment of the invention discloses a data forwarding method, a data forwarding device, data forwarding equipment and a storage medium, wherein the method comprises the following steps: the first device searches a first prefix label associated with a private network address in a forwarding path table of the first device, the forwarding path table of the first device comprises one or more private network addresses and prefix labels associated with the private network addresses, the first device encapsulates the first prefix label, data content and the private network addresses into a first data message, the first device sends the first data message to second devices corresponding to the first prefix label, the first data message is used for obtaining a second data message, the second data message is obtained by encapsulating the second prefix label, the data content and the private network addresses, and the second prefix label is associated with the private network addresses, so that data forwarding between a base station side gateway and a wireless service side gateway can be realized.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a data forwarding method, apparatus, device, and storage medium.
Background
An Internet Protocol Radio Access Network (IPRAN) is an overall solution of a router/switch optimized and customized for an application scenario returned by an IP base station, and as Network IP is continuously advanced, IPRAN becomes more and more important for a mobile Network. In the ip ran networking, an end-to-end route is usually established between a base station side gateway and a wireless service side gateway to implement data forwarding between the base station side gateway and the wireless service side gateway, but when data is forwarded between the base station side gateway and the wireless service side gateway through a prefix tag, if a destination prefix tag is not in a local forwarding path table of the base station side gateway or the wireless service side gateway, data forwarding cannot be implemented, so that a user cannot receive required data. Therefore, how to effectively implement data forwarding between the gateway at the base station side and the gateway at the wireless service side is a problem to be solved urgently at present.
Disclosure of Invention
The invention provides a data forwarding method, a device, equipment and a storage medium, which can realize data forwarding between a base station side gateway and a wireless service side gateway by replacing a prefix label.
In a first aspect, an embodiment of the present invention provides a data forwarding method, where the method includes: the first device searches a first prefix label associated with a private network address in a forwarding path table of the first device, the forwarding path table of the first device comprises one or more private network addresses and prefix labels associated with the private network addresses, the first device encapsulates the first prefix label, data content and the private network addresses into a first data message, the first device sends the first data message to second devices corresponding to the first prefix label, the first data message is used for obtaining a second data message, the second data message is obtained by encapsulating the second prefix label, the data content and the private network addresses, and the second prefix label is associated with the private network addresses.
In the technical scheme, a first device can search a next hop address (namely, a first prefix label) of the first device reaching a private network address in a path forwarding table of the first device, encapsulate the first prefix label, the private network address and data content to be sent into a first data message, send the first data message to a second device corresponding to the first prefix label, the second device can search a next hop address (namely, a second prefix label) of the second device reaching the private network address in a forwarding path table of the second device, replace the first prefix label in the second data message with the second prefix label to obtain a second data message, the second device sends the second data message to a third device corresponding to the second prefix label, data forwarding between the first device and the third device can be realized by exchanging the prefix labels, and when 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, receives VPN routing information sent by the second device through the first neighbor relationship, where the routing information includes a first prefix tag, a private network address, and an RT of the second device, and 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 tag and the private network address in the forwarding path table in the first device.
In the technical scheme, the first device can record the routing information sent by the second device into the forwarding path table of the first device, so that the segmented IGP routing from the first device to the second device can be realized, an end-to-end route does not need to be established, the routing amount of the device can be reduced, the routing pressure of the device can be reduced, and the IGP deployment scheme is more flexible.
In a second aspect, an embodiment of the present invention provides another data forwarding method, where the method includes: the second equipment receives a first data message sent to the private network address by the first equipment, and analyzes the first data message to obtain the private network address, a first prefix label and data content, wherein the first prefix label is a label of the second equipment; the second equipment acquires a second prefix label associated with the private network address, and the second equipment replaces the first prefix label in the first data message with the second prefix label to obtain a second data message; and sending the second data message to a third device corresponding to the second prefix tag.
In the technical scheme, the second device receives a first data message sent to a private network address by the first device, searches a forwarding path table of the second device for a next hop address (namely, a second prefix tag) of the second device reaching the private network address, replaces the first prefix tag in the second data message with the second prefix tag to obtain a second data message, and sends the second data message to a third device corresponding to the second prefix tag.
Optionally, a second prefix tag associated with the private network address is searched in a forwarding path table of the second device, where the forwarding path table of the second device includes one or more private network addresses and prefix tags associated with each private network address; or calculating to obtain the second prefix label according to the first prefix label.
In the technical scheme, the second device may obtain the second prefix tag through a forwarding path table of the second device or according to calculation of the first prefix tag, so as to send the data content to a third device corresponding to the second prefix tag.
Optionally, the second device establishes a second neighbor relationship between the third device and the second device, receives VPN routing information of the third device sent by the third device through the second neighbor relationship, where the routing information includes a private network address and a second prefix tag, and the second device records the VPN routing information of the third device in a forwarding path table of the second device.
In the technical scheme, the second device can record the VPN routing information of the third device into a forwarding path table of the second device, so that segmented IGP routing from the first device to the third device can be realized, end-to-end routing does not need to be established, the routing amount of the device can be reduced, the routing pressure of the device can be reduced, and the IGP deployment scheme is more flexible.
Optionally, the second device establishes a first neighbor relationship between the first device and the second device, replaces a second prefix tag in the VPN routing information of the third device with a first prefix tag of the second device to obtain modified VPN routing information, and sends the modified VPN routing information to the first device through the first neighbor relationship, where the modified VPN routing information is used for recording, by the first device, the first prefix tag and the private network address in a forwarding path table of the first device when a route target RT is the same as an RT in the forwarding path table of the first device.
In the technical scheme, the second device may replace a second prefix label in the VPN routing information of the third device with a first prefix label of the second device to obtain modified routing information, and send the modified routing information to the first device, so that a segmented IGP routing from the first device to the second device may be implemented, an end-to-end routing does not need to be established, the routing amount of the device may be reduced, the routing pressure of the device may be reduced, and the IGP deployment scheme may be more flexible.
Optionally, the second device receives a tag configuration request for the second device, where the configuration request carries a tag of an exchange type; and the second equipment takes the label of the switching class as a first prefix label and configures the second equipment according to the first prefix label.
In this technical solution, the second device may configure the label of the exchange type for the second device, so as to implement the segment IGP routing between the first device and the second device, and implement the segment IGP routing between the second device and the third device.
In a third aspect, an embodiment of the present invention provides a data forwarding apparatus, where the apparatus includes:
the searching module is used for searching a first prefix label associated with a private network address in a forwarding path table of the first device, wherein the forwarding path table of the first device comprises one or more private network addresses and prefix labels associated with each private network address.
And the encapsulation module is used for encapsulating the first prefix label, the data content and the private network address into a first data message.
And the sending module is used for sending the first data message to second equipment corresponding to the first prefix label, the first data message is used for obtaining a second data message, the second data message is obtained by encapsulating a 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, where the apparatus includes:
and the receiving module is used for receiving a first data message sent to the private network address by the first equipment.
And the analysis module is used for analyzing the first data message to obtain the private network address, a first prefix label and data content, wherein the first prefix label is a label of the second equipment.
An obtaining module, configured to obtain a second prefix tag associated with the private network address.
A replacing module, configured to replace a first prefix tag in the first data message with the second prefix tag to obtain a second data message; and sending the second data message to a third device corresponding to the second prefix tag.
In a fifth aspect, an embodiment of the present invention provides a network device, where the network device includes at least one processor, a memory, and instructions stored on the memory and executable by the at least one processor, where the at least one processor executes the instructions to implement the data forwarding method according to the first aspect.
In a sixth aspect, an embodiment of the present invention provides another network device, where the network device includes at least one processor, a memory, and instructions stored on the memory and executable by the at least one processor, where the at least one processor executes the instructions to implement the data forwarding method according to the second aspect of the present invention.
In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer storage medium stores a computer program, where the computer program includes program instructions, and the program instructions, when executed by a processor, cause the processor to implement the data forwarding method according to the first aspect and the second aspect.
In an eighth aspect, an embodiment of the present invention provides a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to make a computer implement the data forwarding method in the first aspect and the second aspect.
Drawings
In order to more clearly illustrate the technical solution in the embodiment of the present invention, the drawings required to be used in the embodiment of the present invention will be described below.
Fig. 1 is a schematic structural diagram of a data forwarding system according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a data forwarding method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another data forwarding system provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another data forwarding system provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a data forwarding apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another data forwarding apparatus provided in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a network device according to 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 Description
The embodiments of the present invention will be described below with reference to the drawings.
The forwarding device in the 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, or may refer to other devices.
In order to better understand a data forwarding method, device and apparatus provided by the embodiments of the present invention, a system architecture of the embodiments of the present invention is described first.
Referring to fig. 1, fig. 1 is a schematic diagram of an architecture of a data forwarding system according to an embodiment of the present invention, where the architecture of the data forwarding system may include a first device, a second device, and a third device, and in an embodiment, the first device may be a Radio Service Gateway (RSG), the second device may be an Aggregation Gateway (ASG), and the third device may be a base station Gateway (CSG). In another embodiment, the first device may be a base station side gateway, the second device may be a convergence side gateway, and the third device may be a wireless service side gateway. The RSG is used for connecting with an operator center machine room; the ASG is used for converging network flow of an access layer; CSG is an access ring device for connecting a wireless base station and an enterprise outdoor wireless gateway (CPE).
In fig. 1, a first device is an RSG, a second device is an ASG, and a third device is a CSG, and the data forwarding system may implement a data forwarding method according to an embodiment of the present invention, specifically, when the RSG sends data to the CSG, the RSG may search a forwarding path table of the RSG for a first prefix tag associated with a private network address of the CSG, encapsulate the first prefix tag, the private network address, and data content to be sent into a first data packet, and send the first data packet to a second device (i.e., the ASG) corresponding to the first prefix tag. When receiving the second data message, the ASG searches for a second prefix tag associated with the private network address in a forwarding path table of the ASG, replaces the first prefix tag of the first data message with the second prefix tag to obtain a second data message, sends the second data message to a third device (i.e., CSG) corresponding to the second prefix tag, receives the second data message, determines that the private network address is the same as the private network address of the CSG, and determines that the second data message is sent to the CSG. The data forwarding between the CSG and the RSG can be realized by exchanging the prefix label, and the problem that the data content can not be forwarded when the destination private network address is not in the forwarding path table of the RSG can be solved.
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, which is applied to the data forwarding system shown in fig. 1, where the system includes a first device, a second device, and a third device, and the method includes:
s101, the second equipment establishes a second neighbor relation between the third equipment and the second equipment.
In order to receive 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, where the second neighbor relationship may be actively established by the second device or passively established by the second device.
In one embodiment, the second neighbor relation may be established proactively 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, the third device receives the request and sends feedback information to the second device, and if the feedback information includes the attribute information of the second device and the attribute information of the third device, the second neighbor relationship between the third device and the second device is successfully established.
The second neighbor relation may refer to a peer-to-peer relation based on an IPv6 Internal Border Gateway Protocol (IBGP), and the attribute information may include a device identifier and the like.
For example, as shown in fig. 3, the first device is an RSG, the second device is an ASG, the third device is a CSG, the ASG may send a request for establishing the second neighbor relation to the CSG, where the request includes a device identifier of the ASG, the CSG receives the request and sends feedback information to the ASG, and if the feedback information includes the device identifier of the CSG and the device identifier of the ASG, the CSG and the ASG successfully establish the IBGP peer relation.
In another embodiment, the second neighbor relation may be established passively 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, the second device receives the request and sends feedback information to the third device, and if the feedback information includes the attribute information of the second device and the attribute information of the third device, 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 relation, wherein the routing information comprises the private network address and a second prefix label.
The second device and the third device may belong to the same Interior Gateway Protocol (IGP) domain, and in order to implement a segmented IGP route between the second device and the third device, the third device may introduce a Loopback interface (i.e., a private network address) route of the third device to the second device, that is, the third device sends VPN route information of the third device to the second device, and specifically, the third device sends the VPN route information of the third device to the second device through the second neighbor relationship, where the route information includes the private network address and a second prefix label. At this time, the second device may look at the Loopback IP of the third device, and a Segment IGP route from the second device to the third device is implemented, that is, a Segment IPv6 route (IPv6Segment Routing, SRv6) tunnel from the second device to the third device is opened, where the Segment SRv6 tunnel is opened means that the second device may 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 equipment receives a tag configuration request for the third equipment, wherein the configuration request carries an endpoint tag; and the third equipment takes the end point label as a second prefix label and configures the third equipment according to the second prefix label.
In order to implement the segmented IGP routing, the user may configure the third device, and the third device receives a tag configuration request for the third device, where the configuration request carries an endpoint tag; the third device uses the end point label as a second prefix label, configures the third device according to the second prefix label, and the device establishing a neighbor relation with the third device can send data to the third device according to the second prefix label.
The end point label may refer to a Provider Edge Router (PE) type end point label of the backbone network.
S103, the second device records the VPN routing information of the third device in the forwarding path table of the second device.
The second device may receive VPN routing information of the third device and record the VPN routing information of the third device in a forwarding path table of the second device. The forwarding path table of the second device includes one or more private addresses and prefix tags associated with each private address, and the tags associated with the private addresses may refer to next-hop addresses, i.e., next-hop addresses from the second device to the private addresses (i.e., third devices).
For example, as shown in fig. 3, the private network address of the CSG is 80.81.1.0, the second prefix tag is 2001:1:: FF29, the ASG receives the routing information of the CSG, records the routing information of the CSG into the forwarding path table of the ASG, and the ASG can describe the forwarding path table of the ASG in the form of a table, as shown in table 1, 2001:1:: FF29 in table 1 refers to the second prefix tag, and 80.81.1.0 refers to the private network address.
Table 1:
| prefix label | 2001:1::FF:FF29 |
| Private network address | 80.81.1.0 |
S104, the second device establishes a first neighbor relation 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, where the first neighbor relationship may be actively established by the second device or passively established by the second device.
In one embodiment, the first neighbor relation may be established proactively by the second device. The second device may send a request for establishing the first neighbor relationship to the first device, where the request includes attribute information of the second device, the first device receives the request and sends feedback information to the second device, and if the feedback information includes the attribute information of the second device and the attribute information of the first device, the first device and the second device successfully establish the first neighbor relationship.
For example, as shown in fig. 3, the ASG may send a request for establishing the second neighbor relation to the RSG, where the request includes attribute information of the ASG, the RSG receives the request and sends feedback information to the ASG, and if the feedback information includes the attribute information of the RSG and the attribute information of the ASG, the RSG and the ASG successfully establish the IBGP peer relation.
In another embodiment, the first neighbor relation may be established passively 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, the second device receives the request and sends feedback information to the first device, and if the feedback information includes the attribute information of the second device and the attribute information of the first device, the first neighbor relationship between the first device and the second device is successfully established.
The first neighbor relation may refer to an IPv 6-based IBGP peer relation, 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 the modified VPN routing information.
Before step S105, the method further includes: the second equipment receives a label configuration request for the second equipment, wherein the configuration request carries a label of an exchange type; and the second equipment takes the label of the switching class as a first prefix label and configures the second equipment according to the first prefix label.
In order to implement the segmented IGP routing, a user may configure the second device, the second device receives a label configuration request for the second device, the configuration request carries a label of a switching type, the second device uses the label of the switching type as a first prefix label, configures the second device according to the first prefix label, and a device that establishes a neighbor relationship with the second device may send data to the second device according to the first prefix label.
The label of the interaction type can refer to a transport virtual private network transit-VPN address configured under a VPN instance, or refer to 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 relation, and the modified VPN routing information is used for recording the first prefix label and the private network address into a forwarding path table of the first device by the first device when a routing target RT is the same as the RT in the forwarding path table of the first device.
The first device and the second device may belong to the same IGP domain, and in order to implement the segmented IGP routing between the first device and the second device, the second device may introduce modified routing information to the first device, and specifically, 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 tag. Segmented IGP routing from the second device to the first device is achieved, i.e., the first device is tunneled to segment SRv6 of the second device, and the segment SRv6 is tunneled, i.e., the next hop for the first device to reach the third device is the second device.
And S107, when the 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, compares an RT value in the modified routing information with an RT value in a forwarding path table in the first device, and if the RT value is different from the RT value in the forwarding path table in the first device, the RT value indicates that data issued by the third device is not required by the first device, and the first device can not record a private network address and a first prefix label; if the two are the same, it indicates that the data issued by the third device is required by the first device, and the first device may record the private network address and the first prefix tag in a forwarding path table of the first device.
For example, if the first prefix label is 2001:2::41, if the RT 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 into the forwarding path table of the RSG, and the RSG may describe the forwarding path table of the RSG in a table form, as shown in table 2, 2001:2::41 in table 2 refers to the first prefix label, and 80.81.1.0 refers to the private network address.
Table 2:
| prefix label | 2001:2::41 |
| Private network address | 80.81.1.0 |
S108, the first device searches a first prefix label associated with the private network address in a forwarding path table of the first device.
When the first device needs to send data to a third device corresponding to a private network address, the first device may search a forwarding path table of the first device for a first prefix tag associated with the private network address, where the first prefix tag may refer to a next-hop address of the third device corresponding to the private network address, and for the first device, the first device may use the first prefix tag as a destination address.
S109, the first equipment encapsulates the first prefix label, the data content and the private network address into a first data message.
The first device may encapsulate the first prefix tag, the data content, and the private network address into a first data packet, and specifically encapsulate the first prefix tag, the data content, that is, the private network address into the first data packet according to the format of the IPv6 packet.
For example, as shown in fig. 4, in the data forwarding system, the first device is an RSG, the second device is an ASG, the third device is a CSG, and assuming that the private network address is 80.81.1.0, the RSG may search the forwarding path table of the RSG shown in table 2 according to the private network address to obtain a first prefix tag associated with the private network address, where the first prefix tag is 2001:2::41, and the RSG encapsulates 2001:2::41, data content, and 80.81.1.0 into a first data packet.
S110, the first equipment sends the first data message to second equipment corresponding to the first prefix label.
S111, the second device analyzes the first data message to obtain a private network address, a first prefix label and data content, wherein the first prefix label is a label of the second device.
And the second equipment receives the first data message and analyzes the first data message to obtain a private network address, a first prefix label and data content.
And S112, acquiring a second prefix label associated with the private network address.
In order to forward the data content segment to the third device corresponding to the second prefix tag, the terminal may acquire the second prefix tag associated with the private network address.
Step S112 includes: the second device searches a second prefix label associated with the private network address in a forwarding path table of the second device, wherein the forwarding path table of the second device comprises one or more private network addresses and prefix labels associated with each private network address; or the second equipment calculates to obtain a 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 tag, the ASG parses the first data packet to obtain the private network address, the first prefix tag and the data content, and searches for a second prefix tag associated with the first prefix tag in the forwarding path table of the ASG shown in table 1, where the second prefix tag is 2001:1:: FF 29.
For another example, a serial number opcode may be configured for the second setting in advance, and the second device may obtain the first prefix tag by calculation according to the second prefix tag, that is, add the serial number to the first prefix tag to obtain the second prefix tag.
Since the number of routes on the second device is particularly large, if one serial number is configured for each route, the second device is subjected to large storage pressure and calculation pressure, and in order to reduce the pressure of the second device, the serial number can be configured on the basis of the peer.
S113, replacing a first prefix label in the first data message by a second prefix label through second equipment to obtain a second data message; and sending the second data message to a third device corresponding to the second prefix tag.
In steps S112 to S113, in order to send the data content to the third device, the second device searches a second prefix tag associated with the private network address in a forwarding path table of the second device, replaces the first prefix tag in the first data packet with the second prefix tag to obtain a second data packet, and sends the second data packet to the third device corresponding to the second prefix tag, and the third device receives the second data packet, compares the private network address in the second data packet with the private network address of the third device, and 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 to obtain the data content.
For example, as shown in fig. 4, the ASG performs prefix tag interchange, specifically, the ASG replaces 2001:2::41 (the first prefix tag) in the first data packet with 2001:1:: FF29 (the second prefix tag) to obtain a second data packet, and sends 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 invention, the third device sends the routing information of the third device to the second device, the second device records the routing information of the third device into the forwarding path table in the second device, the segmented IGP routing from the first device to the third device is realized, end-to-end routing is not required to be established, the routing quantity of the device can be reduced, the routing pressure of the device is reduced, the IGP deployment scheme is more flexible, the second device replaces the second prefix label in the third device with the first prefix label to obtain modified routing information, the modified routing information is sent to the first device, the modified routing information is recorded into the forwarding path table of the first device by the first device, the segmented IGP routing from the first device to the second device can be realized, end-to-end routing is not required to be established, the routing quantity of the device can be reduced, and the routing pressure of the device is reduced, the IGP deployment scenario is made more flexible. In addition, the first device may search for a first prefix tag associated with the private network address from a forwarding path table of the first device, encapsulate the first prefix tag, the private network address, and data content to be sent into a first data packet, and send the first data packet to the second device corresponding to the first prefix tag. When the second device receives the second data message, a second prefix label associated with the private network address is obtained, the first prefix label of the first data message is replaced by the second prefix label to obtain a second data message, the second data message is sent to third equipment corresponding to the second prefix label, the third equipment receives the second data message, the private network address is determined to be the same as the private network address of the third equipment, and the second data message is determined to be sent to the third equipment. When the prefix label of the destination private network address (namely, the prefix label of the third device) is not in the forwarding path table of the first device, the forwarding of the data content can be realized by exchanging the prefix label, and the problem that the data content cannot be forwarded when the destination private network address is not in the forwarding path table of the first device can be solved.
Fig. 5 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 a network device, and the apparatus includes:
the searching module 501 is configured to search a forwarding path table of the first device for a first prefix tag associated with a private network address, where the forwarding path table of the first device includes one or more private network addresses and a prefix tag associated with each private network address.
An encapsulating module 502, configured to encapsulate the first prefix tag, 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 tag, where the first data packet is used to obtain a second data packet, the second data packet is obtained by encapsulating a second prefix tag, the data content, and the private network address, and the second prefix tag is associated with the private network address.
Optionally, the establishing module 504 is configured to establish a first vpn 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 a first prefix tag, the private network address, and an RT of the second device.
Optionally, the recording module 506 is configured to record the first prefix tag and the private network address in a forwarding path table in the first device if the RT is the same as the RT in the forwarding path table in the first device.
In the embodiment of the present invention, the first device may search for the first prefix tag associated with the private network address from the forwarding path table of the first device, encapsulate the first prefix tag, the private network address, and the data content to be sent into the first data packet, and send the first data packet to the second device corresponding to the first prefix tag. When the second device receives the second data message, a second prefix label associated with the private network address is searched in a routing table of the second device, the first prefix label of the first data message is replaced by the second prefix label to obtain a second data message, the second data message is sent to a third device corresponding to the second prefix label, the third device receives the second data message, the private network address is determined to be the same as the private network address of the third device, and the second data message is determined to be sent to the third device. When the prefix label of the destination private network address (namely, the prefix label of the third device) is not in the forwarding path table of the first device, the forwarding of the data content can be realized by exchanging the prefix label, and the problem that the data content cannot be forwarded when the destination private network address is not in the forwarding path table of the first device can be solved.
Fig. 6 is a schematic structural diagram of another data forwarding apparatus according to an embodiment of the present invention, where the data forwarding apparatus is a second device in the embodiment shown in fig. 2. The data forwarding apparatus described in this embodiment is applied to a network device, and the apparatus includes:
the receiving module 601 is configured to receive a first data packet sent by the first device to the private network address.
An analyzing module 602, configured to analyze the first data packet to obtain the private network address, a first prefix tag, and data content, where the first prefix tag is a tag of the second device.
An obtaining module 603, configured to obtain a second prefix tag associated with the private network address.
A replacing module 604, configured to replace the first prefix tag in the first data packet with the second prefix tag to obtain a second data packet; and sending the second data message to a third device corresponding to the second prefix tag.
Optionally, the obtaining module 603 is specifically configured to search a forwarding path table of the second device for a second prefix tag associated with the private network address, where the forwarding path table of the second device includes one or more private network addresses and a prefix tag associated with each private network address; or calculating to obtain the second prefix label 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 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 replacing module 604 is further configured to replace the second prefix tag in the VPN routing information of the third device with the first prefix tag of the second device, so as to obtain 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 relation, where the modified VPN routing information is used to record, by the first device, the first prefix tag and the private network address in a forwarding path table of the first device when the route target RT is the same as an RT in the forwarding path table of the first device.
Optionally, the receiving module 601 is configured to receive a tag configuration request for the second device, where the configuration request carries a tag of an exchange type.
Optionally, the configuring 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 the embodiment of the present invention, the first device may search for the first prefix tag associated with the private network address from the forwarding path table of the first device, encapsulate the first prefix tag, the private network address, and the data content to be sent into the first data packet, and send the first data packet to the second device corresponding to the first prefix tag. When the second device receives the second data message, a second prefix label associated with the private network address is obtained, the first prefix label of the first data message is replaced by the second prefix label to obtain a second data message, the second data message is sent to third equipment corresponding to the second prefix label, the third equipment receives the second data message, the private network address is determined to be the same as the private network address of the third equipment, and the second data message is determined to be sent to the third equipment. When the prefix label of the destination private network address (namely, the prefix label of the third device) is not in the forwarding path table of the first device, the forwarding of the data content can be realized by exchanging the prefix label, and the problem that the data content cannot be forwarded when the destination private network address is not in the forwarding path table of the first device can be solved.
Referring to fig. 7, a schematic structural diagram of a network device according to an embodiment of the present invention is shown, where the network device may refer to a first device in the foregoing embodiment, and the network device includes: the system comprises a processor 701, a memory 702, a communication interface 703 and a power supply 704, wherein the processor 701, the memory 702, the communication interface 703 and the power supply 704 are connected with 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, and the processor 701 may be provided.
The communication interface 703 is connected to other network devices. For example, the communication interface 703 includes a plurality of interfaces to which a plurality of network devices are connected, respectively. The communication interface 703 may be a wired interface, a wireless interface, or a combination thereof. The wired interface may be, for example, an ethernet interface. The ethernet interface may be an optical interface, an electrical interface, or a combination thereof. The wireless interface may be, for example, a Wireless Local Area Network (WLAN) interface, a cellular network interface, or a combination thereof.
And a power supply 704 for supplying power to the network device.
The memory 702 is also used to store program instructions. The processor 701 may call the program instructions stored in the memory 702 to implement the data forwarding method according to the embodiments of the present application.
Based on the same inventive concept, the principle of the network device to solve the problem provided in the embodiment of the present invention is similar to that of the embodiment of the method of the present invention, so the implementation and the beneficial effects of the network device may be referred to and beneficial effects, and for brevity, the description is omitted here for brevity.
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: comprises a processor 801, a memory 802, a communication interface 803 and a power supply 804, wherein the processor 801, the memory 802, the communication interface 803 and the power supply 804 are connected with each other through a bus.
The processor 801 may be one or more CPUs, and in the case where the processor 801 is one CPU, the CPU may be a single-core CPU or a multi-core CPU, and the processor 801.
Memory 802 includes, but is not limited to, RAM, ROM), EPROM, CD-ROM, and the memory 802 is used to store instructions, an operating system, various applications, and data.
The communication interface 803 is connected to a network device. For example, the communication interface 803 includes a plurality of interfaces respectively connected to a plurality of terminals or connected to a forwarding plane device. The communication interface 803 may be a wired interface, a wireless interface, or a combination thereof. The wired interface may be, for example, an ethernet interface. The ethernet interface may be an optical interface, an electrical interface, or a combination thereof. The wireless interface may be, for example, a Wireless Local Area Network (WLAN) interface, a cellular network interface, or a combination thereof.
And a power supply 804 for supplying power to the control plane device.
The memory 802 is also used to store program instructions. The processor 801 may call the program instructions stored in the memory 802 to implement the data forwarding method according to the above embodiments of the present application.
Based on the same inventive concept, the principle of the network device provided in the embodiment of the present invention for solving the problem is similar to that of the embodiment of the method of the present invention, so the implementation and the beneficial effects of the network device may be referred to and beneficial effects, and for brevity, the description is omitted here for brevity.
The present invention also provides a computer-readable storage medium, on which a computer program is stored, and the implementation and beneficial effects of the program for solving the problems can refer to the implementation and beneficial effects of the data forwarding method in fig. 2, and repeated details are not repeated.
The embodiment of the present invention further provides a computer program product, where 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 steps of the data forwarding method in the embodiment corresponding to fig. 2, and the implementation and beneficial effects of the computer program product for solving the problem may refer to the implementation and beneficial effects of the data packet processing method in fig. 2, and repeated details are not repeated.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above.
Claims (18)
1. A method for forwarding data, the method comprising:
the method comprises the steps that first equipment searches a first prefix label associated with a private network address in a forwarding path table of the first equipment, wherein the forwarding path table of the first equipment comprises one or more private network addresses and prefix labels associated with each private network address;
the first equipment encapsulates the first prefix label, the data content and the private network address into a first data message;
and the first equipment sends the first data message to second equipment corresponding to the first prefix label, the first data message is used for obtaining a second data message, the second data message is obtained by encapsulating a 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 of claim 1, wherein the forwarding path table of the first device further includes a Route Target, and wherein before the first device finds the first prefix tag associated with the private network address in the forwarding path table of the first device, the method further includes:
the first device establishes a first virtual private network neighbor relation with the second device;
the first device receives virtual private Network (VirtualPrivate Network) routing information sent by the second device through the first neighbor relation, wherein the routing information comprises a first prefix label, the private Network address and a Reverse Transcription (RT) of the second device;
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 table in the first device.
3. A method for forwarding data, the method comprising:
the second equipment receives a first data message sent by the first equipment to a private network address;
the second device analyzes the first data message to obtain the private network address, a first prefix label and data content, wherein the first prefix label is a label of the second device;
the second device acquires a second prefix tag associated with the private network address;
replacing the first prefix label in the first data message with the second prefix label by the second device to obtain a second data message; and sending the second data message to a third device corresponding to the second prefix tag.
4. The method of claim 3, wherein the second device obtaining a second prefix tag associated with the private network address comprises:
the second device searches a second prefix label associated with the private network address in a forwarding path table of the second device, wherein the forwarding path table of the second device comprises one or more private network addresses and prefix labels associated with each private network address;
or the second equipment calculates 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 tag, and the data content, and the first prefix tag is a tag of the second device, and further comprising:
the second equipment establishes a second neighbor relation between the third equipment and the second equipment;
the second device receives VPN routing information of the third device, which is sent by the third device through the second neighbor relation, wherein the routing information comprises the private network address and the second prefix label;
and the second equipment records the VPN routing information of the third equipment into a forwarding path table of the second equipment.
6. The method of claim 5, wherein the VPN routing information of the third device further comprises a routing target RT, and wherein after the recording of the VPN routing information of the third device into the forwarding path table of the second device, the method further comprises:
the second equipment establishes a first neighbor relation between the first equipment and the second equipment;
replacing a second prefix label in the VPN routing information of the third equipment by the second equipment with a first prefix label of the second equipment to obtain modified VPN routing information;
and the second equipment sends the modified VPN routing information to the first equipment through the first neighbor relation, wherein the modified VPN routing information is used for recording the first prefix label and the private network address into a forwarding path table of the first equipment when the route target RT is the same as the RT in the forwarding path table of the first equipment.
7. The method of any of claims 3-6, further comprising:
the second equipment receives a label configuration request for the second equipment, wherein the configuration request carries a label of an exchange type;
and the second equipment takes the label of the switching class as the first prefix label and configures the second equipment according to the first prefix label.
8. A data forwarding apparatus, characterized in that the apparatus comprises:
the searching module is used for searching a first prefix label associated with a private network address in a forwarding path table of the first equipment, wherein the forwarding path table of the first equipment comprises one or more private network addresses and prefix labels associated with each private network address;
the encapsulation module is used for encapsulating the first prefix label, the data content and the private network address into a first data message;
and the sending module is used for sending the first data message to second equipment corresponding to the first prefix label, the first data message is used for obtaining a second data message, the second data message is obtained by encapsulating a 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 of claim 8, wherein the forwarding path table of the first device further comprises a route target RT, and wherein the apparatus further comprises:
the establishing module is used for establishing a first virtual private network neighbor relation with the second equipment;
a receiving module, configured to receive VPN routing information sent by the second device through the first neighbor relation, where the routing information includes a first prefix tag, the private network address, and an RT of the second device;
a recording module, configured to record the first prefix tag and the private network address in a forwarding path table in the first device if the RT is the same as the RT in the forwarding path table in the first device.
10. A data forwarding apparatus, characterized in that the apparatus comprises:
the receiving module is used for receiving a first data message sent by the first equipment to a private network address;
the analysis module is used for analyzing the first data message to obtain the private network address, a first prefix label and data content, wherein the first prefix label is a label of the second equipment;
an obtaining module, configured to obtain a second prefix tag associated with the private network address;
searching a second prefix label associated with the private network address in a forwarding path table of the second device, wherein the forwarding path table of the second device comprises one or more private network addresses and prefix labels associated with each private network address;
a replacing module, configured to replace a first prefix tag in the first data message with the second prefix tag to obtain a second data message; and sending the second data message to a third device corresponding to the second prefix tag.
11. The apparatus of claim 10, comprising:
the obtaining module is specifically configured to search a forwarding path table of the second device for a second prefix tag associated with the private network address, where the forwarding path table of the second device includes one or more private network addresses and prefix tags associated with each private network address;
or calculating to obtain the second prefix label according to the first prefix label.
12. The apparatus of claim 10,
the device further comprises:
an establishing module, configured to establish 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 relation, where the routing information includes the private network address and the second prefix tag;
a recording module, configured to record the VPN routing information of the third device into a forwarding path table of the second device.
13. The apparatus of claim 12,
the establishing module is further configured to establish a first neighbor relationship between the first device and the second device;
the replacing module is further configured to replace a second prefix tag in the VPN routing information of the third device with a first prefix tag of the second device, so as to obtain modified VPN routing information;
the device further comprises:
a sending module, configured to send the modified VPN routing information to the first device through the first neighbor relation, where the modified VPN routing information is used for recording, by the first device, the first prefix tag and the private network address in a forwarding path table of the first device when the route target RT is the same as an RT in the forwarding path table of the first device.
14. The apparatus according to any one of claims 10 to 13,
the receiving module is configured to receive a tag configuration request for the second device, where the configuration request carries a tag of an exchange type;
the device further comprises:
and the configuration module is used for configuring the second device by taking the label of the switching class as the first prefix label according to the first prefix label.
15. A network device comprising at least one processor, memory, and instructions stored on the memory and executable by the at least one processor, wherein the at least one processor executes the instructions to implement the steps of the data forwarding method of any one of claims 1 or 2.
16. A network device comprising at least one processor, memory, and instructions stored on the memory and executable by the at least one processor, wherein the at least one processor executes the instructions to perform the steps of the data forwarding method of any one of claims 3 to 7.
17. A computer-readable storage medium, characterized in that the computer storage medium stores a computer program comprising program instructions which, when executed by a processor, cause the processor to carry out the steps of the data forwarding method according to any one of claims 1 to 7.
18. A computer program product, characterized in that the computer program product comprises a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform the steps of the data forwarding method of any one of claims 1 to 7.
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