CN115174475A

CN115174475A - SDWAN-based data transmission method and device

Info

Publication number: CN115174475A
Application number: CN202210546924.6A
Authority: CN
Inventors: 吴桐华; 王丽梅; 崔一佳; 温彦龙; 王振民; 朱学欢
Original assignee: Tianyi Cloud Technology Co Ltd
Current assignee: Tianyi Cloud Technology Co Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-10-11
Anticipated expiration: 2042-05-18
Also published as: CN115174475B

Abstract

The embodiment of the application provides a data transmission method and device based on an SDWAN (digital subscriber line network), which are used for reducing the transmission quantity of routes in the SDWAN network, reducing the specification of a reflector device routing table entry and improving the reliability and stability of the SDWAN network. The method comprises the following steps: a first access point POP receives routing information sent by Customer Premise Equipment (CPE) of a plurality of tenants; establishing a mapping relation between the routing information and the target route, and generating a route mapping table item based on the mapping relation: and sending the target route to a route reflector, sending the route mapping table item to a Software Defined Network (SDN) controller, so that the route reflector sends the target route to a second POP, sending the route mapping table item to the second POP through the SDN controller, and acquiring route information based on the target route and the route mapping table item and guiding data transmission based on the route information by the second POP.

Description

SDWAN-based data transmission method and device

Technical Field

The invention relates to the technical field of network communication and data transmission, in particular to a data transmission method and device based on an SDWAN (digital subscriber line network interface).

Background

Software Defined Wide Area Network (SDWAN) is a new Wide Area Network (WAN) technology, and the SDWAN connects each branch site of an enterprise (tenant) with multiple clouds, and can be applied to different types of Wide Area Network links, such as Internet, multi-Protocol Label Switching (MPLS), 5G, long Term Evolution (Long Term Evolution, LTE), and the like. The SDWAN network assists a user in establishing an exclusive wide area network among clouds, a data center and enterprise branches in a minute-scale mode through intelligent gateways deployed in zero contact, and exclusive wide area network access, multi-place networking, flexible configuration and intelligent scheduling and management services are provided for enterprises.

With the continuous increase of the service scale of the SDWAN Network, the number of tenants increases, the services increase, which results in a rapid increase of the routing amount, a Route Reflector (RR) needs to learn an Ethernet Virtual Private Network (EVPN) type5 Route of the whole Network, which results in that the specification of a routing table entry of the Reflector device reaches a bottleneck, and both a client branch Point and Network adjustment on the cloud cause the relevant access Point (Point of Presence, POP) and RR device to increase, delete and modify the EVPN type5 Route, and frequent Route updating easily causes device failure, which is not favorable for maintaining the reliability and stability of the SDWAN Network.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device based on an SDWAN (digital subscriber line network), which are used for reducing the transmission quantity of routes in the SDWAN network, reducing the specification of a reflector device routing table entry and improving the reliability and stability of the SDWAN network.

In a first aspect, a method for SDWAN-based data transmission is provided, where the method includes:

a first access point POP receives routing information sent by Customer Premise Equipment (CPE) of a plurality of tenants; one tenant comprises at least one CPE, and one CPE sends routing information;

establishing a mapping relation between the routing information and a target route, and generating a route mapping table item based on the mapping relation: the target route is a route which is generated by the first POP and is related to the address of the target route;

sending the target route to a route reflector and sending the route mapping table entry to a Software Defined Network (SDN) controller, so that the route reflector sends the target route to a second POP, and sending the route mapping table entry to the second POP through the SDN controller, wherein the second POP acquires the route information based on the target route and the route mapping table entry, and guides data transmission based on the route information; wherein the first and second POPs contain the same tenant.

Optionally, the target route is an EVPN type5 route, and the establishing a mapping relationship between the route information and the target route includes:

generating a plurality of EVPN type5 routes based on the routing information sent by the CPEs of the plurality of tenants;

and establishing a mapping relation between the plurality of EVPN type5 routes and the target route.

Optionally, the method further includes:

detecting whether the routing information sent by the CPE of the plurality of tenants changes;

if the routing information sent by the CPE of any tenant in the tenants changes, acquiring new routing information sent by the CPE of any tenant;

updating the routing mapping table entry based on the new routing information; or sending an update instruction to the SDN controller; wherein the new routing information is included in the update instruction to cause the SDN controller to update the routing map entry based on the new routing information.

In a second aspect, a method for SDWAN-based data transmission is provided, the method comprising:

receiving a routing mapping table item sent by a first access point POP; the route mapping table entry is generated by the first POP based on the mapping relation between the route information sent by the Customer Premise Equipment (CPE) of a plurality of tenants and a target route, the target route is a route which is generated by the first POP and is related to the address of the first POP, one tenant comprises at least one CPE, and one CPE sends one route information;

sending the route mapping table item to a second POP (point of presence) so that the second POP acquires the route information based on the route mapping table item and guides data transmission based on the route information; wherein the first and second POPs contain the same tenant.

Optionally, the method further includes:

receiving an updating instruction sent by the first POP; the updating instruction comprises new routing information, and the new routing information is routing information sent after any tenant service in the tenants is adjusted;

updating the route mapping table entry based on the new route information;

and sending the updated route mapping table entry to the second POP.

In a third aspect, a method for data transmission based on an SDWAN is provided, the method including:

a second access point POP receives a target route sent by a route reflector and a route mapping table item sent by a software defined network SDN controller; the target route is a route which is generated for a first POP and is related to the address of the target route, the first POP and a second POP contain the same tenant, the route mapping table entry is generated for the first POP based on the mapping relation between the route information sent by the customer premises equipment CPE of a plurality of tenants and the target route, one tenant comprises at least one CPE, and one CPE sends one route information;

acquiring the routing information based on the target route and a route mapping table item;

directing data transmission based on the routing information.

Optionally, the method further includes:

determining whether a new routing mapping table entry sent by the SDN controller is received;

and if the new route mapping table entry is received, acquiring new route information based on the new route mapping table entry.

In a fourth aspect, an SDWAN-based data transmission apparatus for use with a first POP point of presence is provided, the apparatus comprising:

the communication module is used for receiving routing information sent by Customer Premise Equipment (CPE) of a plurality of tenants; one tenant comprises at least one CPE, and one CPE sends routing information;

a processing module, configured to establish a mapping relationship between the routing information and a target route, and generate a route mapping table entry based on the mapping relationship: the target route is a route which is generated by the processing module and is related to the self address;

the communication module is further configured to send the target route to a route reflector and send the route mapping table entry to a Software Defined Network (SDN) controller, so that the route reflector sends the target route to a second POP, and send the route mapping table entry to the second POP through the SDN controller, where the second POP obtains the route information based on the target route and the route mapping table entry, and directs data transmission based on the route information; wherein the first and second POPs contain the same tenant.

Optionally, the target route is an EVPN type5 route, and the processing module is specifically configured to:

Optionally, the processing module is further configured to:

detecting whether the routing information sent by the CPEs of the plurality of tenants changes or not;

updating the routing mapping table entry based on the new routing information; or, controlling the communication module to send an update instruction to the SDN controller; wherein the new routing information is included in the update instruction to cause the SDN controller to update the routing map entry based on the new routing information.

In a fifth aspect, an SDWAN-based data transmission apparatus is provided, which is applied to a software defined network SDN controller, and includes:

the communication module is used for receiving a routing mapping table item sent by a first access point POP; the route mapping table entry is generated by the first POP based on the mapping relation between the route information sent by Customer Premises Equipment (CPE) of a plurality of tenants and a target route, the target route is a route generated by the first POP and related to the address of the first POP, one tenant comprises at least one CPE, and one CPE sends one route information;

the communication module is further configured to send the route mapping table entry to a second POP, so that the second POP acquires the route information based on the route mapping table entry and directs data transmission based on the route information; wherein the first and second POPs contain the same tenant.

Optionally, the communication module is further configured to:

the SDWAN-based data transmission device further comprises a processing module, which is used for:

updating the routing mapping table entry based on the new routing information;

the communication module is further configured to:

and sending the updated route mapping table to the second POP.

In a sixth aspect, an SDWAN-based data transmission apparatus is provided, which is applied to a second POP point, and includes:

the communication module is used for the POP to receive a target route sent by the route reflector and a route mapping table item sent by the SDN controller; the target route is a route which is generated for a first POP and is related to the address of the target route, the first POP and a second POP contain the same tenant, the route mapping table entry is generated for the first POP based on the mapping relation between the route information sent by the customer premises equipment CPE of a plurality of tenants and the target route, one tenant comprises at least one CPE, and one CPE sends one route information;

a processing module, configured to obtain the routing information based on the target route and a route mapping table entry;

the processing module is further configured to direct data transmission based on the routing information.

Optionally, the processing module is further configured to:

and if the new route mapping table item is received, acquiring new route information based on the new route mapping table item.

In a seventh aspect, an electronic device is provided, which includes:

a memory for storing program instructions;

a processor for calling the program instructions stored in said memory and for executing the steps comprised in any of the methods of the first aspect in accordance with the obtained program instructions.

In an eighth aspect, there is provided a computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform the steps included in the method of any one of the first aspects.

In a ninth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the SDWAN based data transmission method described in the various possible implementations described above.

In the embodiment of the application, a first POP in an SDWAN network receives routing information sent by customer premises equipment CPEs of a plurality of tenants, wherein one tenant includes at least one CPE, one CPE sends one routing information, and establishes a mapping relationship between the routing information and a target route based on the received routing information and the target route generated by the first POP and associated with its own address, then generates a route mapping table based on the mapping relationship, sends the target route to a route reflector, sends the route mapping table to a software defined network SDN controller, sends the target route to a second POP having the same tenant as the first POP through the route reflector, and sends the route mapping table to the second POP through the SDN controller, so that the second POP acquires the routing information based on the target POP route and the route mapping table, and directs data transmission based on the acquired routing information.

That is to say, in the present application, each POP only needs to generate a route related to its own address, then a mapping relationship between the route of each accessed tenant and its own route is established, and a corresponding route mapping table entry is generated, the route of the routing reflector is sent to other POPs, and the route mapping table entry is sent to other POPs by the SDN controller, so that the routing reflector only needs to learn the route of each POP, and no matter whether the number of tenants and the service change, when the number of POPs is fixed, the number of routes that the routing reflector needs to learn is unchanged, thereby effectively reducing the number of routes transferred in the SDWAN network, and reducing the specification of the routing table entry of the reflector device; in addition, when the number of POPs is fixed, no matter what the routing information of each POP access tenant changes, the routing generated by each POP cannot be influenced (namely, the route updating process of the tenant is not processed by a route reflector any more), and the network oscillation caused by frequent route updating can be effectively avoided, so that the pressure of the route reflector is reduced, and the reliability and the stability of the SDWAN network can be effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application.

FIG. 1 is a diagram of an SDWAN network architecture provided by an embodiment of the present application;

fig. 2 is a flowchart of an SDWAN-based data transmission method according to an embodiment of the present application;

FIG. 3 is a flowchart of an SDWAN-based data transmission method provided by an embodiment of the present application;

fig. 4 is a block diagram of an SDWAN-based data transmission apparatus according to an embodiment of the present application;

fig. 5 is a block diagram of another SDWAN-based data transmission apparatus according to an embodiment of the present application;

FIG. 6 is a block diagram of another SDWAN-based data transfer device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a computer device in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. In the present application, the embodiments and features of the embodiments may be arbitrarily combined with each other without conflict. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

The terms "first" and "second" in the description and claims of the present application and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the term "comprises" and any variations thereof, which are intended to cover non-exclusive protection. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The "plurality" in the present application may mean at least two, for example, two, three or more, and the embodiments of the present application are not limited.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document generally indicates that the preceding and following related objects are in an "or" relationship unless otherwise specified.

For ease of understanding, the technical background of the embodiments of the present invention is described below.

At present, during data transmission based on the SDWAN network, each POP needs to send all routing information sent by each tenant to a routing reflector, and learn each routing through the routing reflector (i.e., RR device), and send the routing information to other POPs, for example, a tenant 1 and a tenant 2 are accessed in the POP1, the tenant 1 has 100 Customer Premise Equipment (CPE) all sending routing information, and the tenant 2 has 200 CPE devices sending routing information, then the POP1 sends 300 pieces of received routing information to RR devices, and the RR devices learn 300 pieces of routing information and send to other POPs, so that when the number of services of each tenant increases (i.e., the number of CPE devices increases) or the number of tenants accessed to the POP1 increases, the number of routes that the RR devices need to learn increases, and the RR devices need to frequently update routes, which is not favorable for maintaining reliability and stability of the SDWAN network. At present, there is a scheme that an EVPN type2 route with the same Level 3vxlan network identity (L3 VNI) of a virtual extensible local area network may be formed into a group to be aggregated, aggregation route network segment information of each group to be aggregated is determined according to a host Internet Protocol (IP) address included in each group to be aggregated, and a corresponding EVPN type5 route is generated.

In view of this, the embodiments of the present application provide a data transmission method based on an SDWAN network, the method receiving, through a first POP in the SDWAN network, routing information sent by customer premise equipment CPEs of multiple tenants, wherein one tenant includes at least one CPE, and one CPE sends one routing information, and establishes a mapping relationship between the routing information and a target route generated by the first POP and associated with its own address, and then generates a route mapping table based on the mapping relationship, sends the target route to a route reflector, and sends the route mapping table to a software defined network controller, sends the target route to a second POP having the same tenant table as the first POP through the route reflector, and sends the route mapping table to the second POP through the SDN controller, so that the second POP acquires routing information based on the target route and the route mapping table, and directs data transmission based on the acquired routing information. According to the method, the flow can be forwarded (namely, data transmission is realized) only by sending one EVPN type5 route through each POP point, the CPE equipment host addresses of each tenant are not required to be continuous, and cross-tenant and cross-network-segment route aggregation is realized.

After introducing the design concept of the embodiment of the present application, some simple descriptions are provided below for application scenarios to which the technical solution of the embodiment of the present application can be applied, and it should be noted that the application scenarios described below are only used for describing the embodiment of the present application and are not limited. In specific implementation, the technical scheme provided by the embodiment of the application can be flexibly applied according to actual needs.

Please refer to fig. 1, fig. 1 is a diagram of an SDWAN Network architecture provided in the embodiment of the present application, where the SDWAN Network architecture is divided into a Network layer, a control layer and a management layer, the Network layer is composed of a CEP (hereinafter, may also be referred to as a customer branch site) and a POP (point of presence of a CPE), and a virtual extensible Local Area Network (VXLAN) technology is used to implement arbitrary connection between a CPE device and a cloud; RR equipment and SDN controller are used for controlling the layer, RR equipment is responsible for reflecting the route of each POP point, SDN controller is used for forwarding the route mapping table item sent by each POP point, the automatic deployment and configuration of the network are realized, and the route transmission and control among different sites are completed; the management layer is composed of an SDWAN controller and is responsible for managing the whole service, and the management of the network element equipment and the butt joint with a cloud platform are realized through a network configuration protocol NECNF/YANG. It should be noted that both the SDN controller and the SDWAN controller are included in the controller cluster, and are not separately shown in the figure.

In this embodiment of the application, a CPE of a tenant sends routing information to an accessed POP (for example, a first POP), the first POP establishes a mapping relationship between the routing information sent by the CPEs of a plurality of tenants and a generated route (a target route) related to its own address, generates a route mapping table, sends the target route to an RR device, sends the generated route mapping table to an SDN controller, the RR device learns the received target route, and forwards the target route to another POP (a second POP) having the same tenant access as the first POP according to the learning result, the SDN controller forwards the received route mapping table to the second POP, and after receiving the route sent by the RR device and the route mapping table sent by the SDN controller, the second POP performs reflection processing on the target route and the route mapping table, regenerates detailed routes (i.e., routing information) of the CPEs of the plurality of tenants, and forwards traffic according to the routing information guidance (i.e., data transmission is guided based on the routing information).

After the application scenarios of the embodiments of the present application are introduced, the following describes technical solutions provided by the embodiments of the present application with reference to drawings of the specification.

Referring to fig. 2, fig. 2 is a flowchart of an SDWAN-based data transmission method according to an embodiment of the present application. The method flow diagram shown in fig. 2 is as follows:

step 201: a first POP receives routing information sent by CPE of a plurality of tenants;

one tenant comprises at least one CPE device, each CPE device corresponds to one host address, and the CPE device can send routing information generated by the CPE device to an accessed POP. In this embodiment of the application, the first POP may receive routing information sent by CPE devices of all tenants that access, for example, the POP accessed by tenant 1, tenant 2, and tenant 3 is the first POP, tenant 1 includes 3 CPE devices, respectively CPE-1, CPE-2, and CPE-3, tenant 2 includes 2 CPE devices, respectively CPE-4 and CPE-5, tenant 3 includes 2 CPE devices, respectively CPE-a, and CPE-b, and the first POP may receive routing information sent by the foregoing 7 CPE devices.

Step 202: establishing a mapping relation between the routing information and the target route, and generating a route mapping table item based on the mapping relation;

the target route is a route generated by the first POP and related to the self address, for example, the route generated by the first POP based on the Network Layer availability Information (NLRI), and the NLRI component fields are shown in table 1:

Route Distinguisher	routing RD value
		Ethernet Segment Identifier	Identification ESI linked with opposite terminal
Ethernet Tag ID	VLAN ID
		IP Prefix Length	IP prefix mask length
IP Prefix	IP frontOrnament (A. B. A. B. A
		GW IP Address	Default gateway address
MPLS Label	Three-layer VNI

TABLE 1

As a possible implementation manner, considering that the SDWAN network is mainly used for processing EVPN type5 routing, that is, a target route that the first POP needs to send via the RR device is EVPN type5 routing, in this embodiment of the present application, the first POP may establish a mapping relationship between the received routing information and the target route based on the following manners:

the first method comprises the following steps: after receiving the routing information sent by the CPE device of each tenant, the first POP may further generate a corresponding EVPN type5 Route based on each piece of received routing information, and establish a mapping relationship between the EVPN type5 Route generated based on the received routing information and the target Route, specifically, in consideration of that, in the NLRI composition field, the Route Distinguisher, the Ethernet Segment Identifier, the Ethernet Tag ID, and the GW IP Address are common, in the embodiment of the present application, the first POP may acquire the IP Prefix Length, the IP Prefix and the Label field in the EVPN type5 Route generated based on each piece of received routing information, and acquire the IP Prefix Length, the IP Prefix and the Label field in the target Route, establish a mapping relationship between the IP Prefix Length, the IP Prefix and the MPLS field in the EVPN type5 Route generated based on the acquired routing information and the IP Prefix Length, the IP Prefix and the MPLS field in the target Route, and take the mapping relationship between the IP Prefix Length and the IP Prefix Length in the EVPN type5 Route generated based on the acquired routing information as the mapping relationship between the IP Prefix Length and the IP Prefix Length in the target Route;

and the second method comprises the following steps: after receiving routing information sent by CPE equipment of each tenant, a first POP generates a corresponding EVPN type5 Route based on each piece of received routing information, obtains IP Prefix Length, IP Prefix and MPLS Label fields in each EVPN type5 Route, maps the fields in a many-to-one manner to obtain mapped IP Prefix Length, IP Prefix and MPLS Label fields, and generates a target Route based on the mapped fields and other shared fields (Route distingguicher, ethernet Segment Identifier, ethernet Tag ID and GW IP Address), wherein the mapping relationship established during the many-to-one mapping is the mapping relationship between the received routing information and the target Route, and the mapping relationship is a possible implementation mode and has no relation between the IP Prefix Length, IP Prefix and MPLS Label fields of the first POP and the IP Prefix Length, IP mask and IP Prefix I of the first POP.

And the third is that: after the first POP receives the routing information sent by the CPE equipment of each tenant, a mapping relation is established directly based on the received routing information and a target route (EVPN type5 route).

As a possible implementation manner, when each tenant includes multiple CPE devices, the host addresses of the multiple CPE devices of each tenant may be continuous or discontinuous, that is, in this embodiment, whether the host addresses of the multiple CPE devices of each tenant are continuous or not need not to be considered, and the mapping relationship may be directly constructed regardless of whether the host addresses of each CPE device are continuous or not.

After establishing the mapping relationship between the received routing information and the target route, the first POP may further generate a routing mapping table entry based on the mapping relationship, specifically, please refer to tables 2 to 4, where table 2 is an EVPN type5 route generated by the first POP based on the routing information of the CPE device of the access tenant, table 3 is an EVPN type5 route generated by the first POP and related to its own address, a mapping relationship exists between tables 2 and 3, and table 4 is a routing mapping table entry generated by the first POP based on the mapping relationship between tables 2 and 3.

Tenant	CPE host address	Three-layer VNI	Next hop
				Tenant A	10.1.100.0/24	100	VTEP
Tenant A	192.168.100.0/24	100	VTEP
				Tenant B	10.2.200.0/24	200	VTEP
Tenant B	192.168.200.0/24	200	VTEP

TABLE 2

First POP address	Three-layer VNI	Next hop
			100.100.100.100/32	1998	VTEP

TABLE 3

TABLE 4

In the specific implementation process, no matter how many tenants are accessed into the first POP, each tenant comprises many CPE devices, and finally, only one route generated by the first POP is required to be forwarded to EVPN type5 routes of other POPs through the RR device, so that cross-tenant and cross-network-segment route aggregation is realized, the number of EVPN type5 routes transmitted in the SDWAN network is greatly reduced, the table item specification pressure of the RR device is reduced, in the RR device model selection, the device model with a lower route specification can be selected, and the network construction cost is reduced.

Step 203: the target route is sent to the route reflector, and the route mapping table entry is sent to the SDN controller.

In the embodiment of the application, a first POP sends a generated target route to RR equipment and sends a generated route mapping table item to an SDN controller, the RR equipment learns the target route, the target route is forwarded to a second POP with the same tenant as the first POP, and the SDN controller forwards the received route mapping table item to the second POP. And after receiving the target route and the route mapping table item sent by the RR equipment, the second POP performs reflection processing on the corresponding route mapping table item based on the target route to obtain a mapping relation between the target route and the route information received by the first POP, acquires the route information of the CPE equipment of each tenant accessed to the first POP based on the mapping relation, and guides data transmission based on the route information.

For example, the first POP sends the table 3 to the RR device, the RR device to the second POP, and the table 4 to the SDN controller, the SDN controller sends the table 4 to the second POP, and the second POP performs inverse mapping processing based on the table 3 and the table 4 to obtain the table 2, thereby obtaining the routing information of the CPE device of each tenant, and guiding data transmission based on the routing information.

In some embodiments, when the service of the tenant is adjusted, the routing information that may be sent may change, and taking the example in step 201 as an example, the service of tenant 1 is adjusted, and a CPE device is added (or decreased), and at this time, the routing information that tenant 1 sends to the first POP changes (a piece of routing information is added or decreased); or, a network manager modifies a host address of CPE-1 of tenant 1, and at this time, a host address in routing information sent by CPE-1 changes, and these changes all cause routing update, so in this embodiment of the application, after the first POP sends a target route and a routing mapping table entry to the RR device and the SDN controller, it may further detect whether routing information sent by CPEs of accessed tenants changes (whether there is a modification, an increase, or a decrease), and if the routing information sent by a CPE of any tenant of multiple tenants changes, obtain new routing information sent by the CPE of the tenant, update the routing mapping table entry based on the new routing information, send the updated routing mapping table entry to the SDN controller, and the SDN controller forwards the updated routing mapping table entry to the second POP. Or the first POP sends an update instruction carrying new routing information to the SDN controller, after the SDN controller receives the update instruction, the SDN controller updates a routing mapping table item sent by the first POP based on the new routing information carried in the update instruction, sends the updated routing mapping table item to the second POP, and the second POP reacquires new routing information based on the updated routing mapping table item.

In a specific implementation process, when the routing information sent by the CPE device of the tenant accessed by the first POP changes, only the routing mapping table entry needs to be updated, and the updated routing mapping table entry is sent to the second POP through the SDN controller without changing the target route of the first POP, so that performance pressure on RR devices due to frequent route updating can be effectively avoided, and reliability and stability of a network are improved.

In some other embodiments, the second POP may include a plurality of POPs, for example, the tenant accessed by the first POP (POP 1) includes tenant a, tenant B, and tenant C, the tenant accessed by POP2 includes tenant a, tenant B, and tenant D, and the tenant accessed by POP3 includes tenant a, tenant C, and tenant D, wherein both POP2 and POP3 have the same tenant as POP1, and thus the second POP at this time includes POP2 and POP3.

In a possible implementation manner, when the second POP includes multiple POPs, after the first POP sends the target route to the RR device, the RR device forwards the target route to all other POPs (i.e., second POPs) including tenants in the first POP through learning of the target route, the SDN controller splits the route mapping table entry according to information of each POP access tenant, generates multiple sub-route mapping table entries, and sends each sub-route mapping table entry to a corresponding POP, which is described by taking the above example as an example. The method comprises the steps that a target route is sent to POP2 and POP3 by POP1, an SDN controller divides a route mapping table item sent by POP1 into a first sub-route mapping table item and a second sub-route mapping table item according to information of accessing tenants of POP2 and POP3, the first sub-route mapping table item is the route mapping table item sent to POP2 and comprises the mapping relation between route information of tenants A and B and the target route, and the second sub-route mapping table item is the route mapping table item sent to POP3 and comprises the mapping relation between the route information of tenants A and C and the target route. In a possible implementation manner, the POP4 includes a tenant D, and the SDN controller may further merge a route mapping table entry between route information of the tenant D sent by the POP4 and a target route of the POP4 with the first sub-route mapping table entry and the second sub-route mapping table entry, and send the merged first sub-route mapping table entry and second sub-route mapping table entry to the POP2 and POP3, respectively.

Specifically, when the service of the tenant a accessed by the POP1 is adjusted and the routing information sent by the CPE device of the tenant a is changed, the POP1 updates a routing mapping table entry and sends the updated routing mapping table entry to the SDN controller, the SDN controller splits the updated routing mapping table entry to obtain a first sub-routing mapping table entry and a second sub-routing mapping table entry, and determines that the changed routing information is the routing information sent by the CPE device of the tenant a according to the updated routing mapping table entry, which indicates that the contents in the sub-routing mapping table entries required to be sent to the POP2 and the POP3 are changed, and at this time, the SDN controller sends the first sub-routing mapping table entry and the second sub-routing mapping table entry to the POP2 and the POP3 respectively; or the POP1 sends an update instruction of new routing information sent by the CPE device carrying the tenant a to the SDN controller, and when receiving the update instruction, the SDN controller updates the first sub-routing mapping table entry and the second sub-routing table entry based on the new routing information carried in the update instruction, and sends the updated first sub-routing mapping table entry and second sub-routing table entry to the POP2 and POP3, respectively.

When the service of a tenant B accessed by POP1 is adjusted and routing information sent by CPE equipment of the tenant B is changed, the POP1 updates a routing mapping table item and sends the updated routing mapping table item to an SDN controller, the SDN controller splits the updated routing mapping table item to obtain a first sub-routing mapping table item and a second sub-routing mapping table item, and determines that the changed routing information is the routing information sent by the CPE equipment of the tenant B according to the updated routing mapping table item, which indicates that only the content in the sub-routing mapping table item (namely the first sub-routing mapping table item) needing to be sent to POP2 is updated, at the moment, the SDN controller sends only the first sub-routing mapping table item to POP2 without resending the second sub-routing mapping table item; or the POP1 sends an updating instruction of new routing information sent by CPE equipment carrying the tenant A to the SDN controller, and the SDN controller updates the first sub-routing mapping table item based on the new routing information carried in the updating instruction and sends the updated first sub-routing mapping table item to the POP2 when receiving the updating instruction.

In a specific implementation process, when the second POP includes a plurality of POPs, the SDN controller splits and merges the received routing mapping table entries, so that the size of the routing mapping table entry sent to each POP by the SDN controller can be reduced, and network resources are saved.

Based on the SDWAN-based data transmission flow shown in fig. 2, fig. 3 shows a flow interaction diagram among a first POP, an SDN controller, and a second POP, and the flow shown in fig. 3 is as follows:

step 301: a first POP receives routing information sent by CPE of a plurality of tenants;

step 302: the first POP generates an EVPN type5 route based on the route information;

step 303: the first POP establishes a mapping relation between the routing information and the target route, and generates a route mapping table item based on the mapping relation;

step 304: sending the target route to RR equipment and sending a route mapping table item to an SDN controller;

step 305: the RR equipment sends the target route to a second POP, and the SDN controller sends the route mapping table item to the second POP;

step 306: the second POP acquires routing information sent by CPE of a plurality of tenants based on the target routing and the routing mapping table items;

step 307: the second POP directs data transmission based on the acquired routing information.

Based on the same inventive concept, the embodiment of the present application provides an SDWAN-based data transmission apparatus, which can implement the corresponding functions of the foregoing SDWAN-based data transmission method. The SDWAN-based data transfer device may be a hardware structure, a software module, or a hardware structure plus a software module. The SDWAN-based data transmission device can be realized by a chip system, and the chip system can be formed by a chip and can also comprise the chip and other discrete devices. Referring to fig. 4, the SDWAN-based data transmission apparatus includes a communication module 401 and a processing module 402. Wherein:

a communication module 401, configured to receive routing information sent by customer premise equipment CPEs of multiple tenants; one tenant comprises at least one CPE, and one CPE sends routing information;

a processing module 402, configured to establish a mapping relationship between the routing information and a target route, and generate a route mapping table entry based on the mapping relationship: wherein the target route is a route generated by the processing module 402 and related to the self address;

the communication module 401 is further configured to send the target route to a route reflector and send the route mapping table entry to a Software Defined Network (SDN) controller, so that the route reflector sends the target route to a second POP, and send the route mapping table entry to the second POP through the SDN controller, where the second POP obtains the route information based on the target route and the route mapping table entry, and directs data transmission based on the route information; wherein the first and second POPs contain the same tenant.

Optionally, the target route is an EVPN type5 route, and the processing module 402 is specifically configured to:

Optionally, the processing module 402 is further configured to:

updating the routing mapping table entry based on the new routing information; or, the communication module 401 is controlled to send an update instruction to the SDN controller; wherein the new routing information is included in the update instruction, so that the SDN controller updates the routing mapping table entry based on the new routing information.

Based on the same inventive concept, the embodiment of the application provides an SDWAN-based data transmission device, and the SDWAN-based data transmission device can realize the corresponding functions of the SDWAN-based data transmission method. The SDWAN-based data transfer device may be a hardware structure, a software module, or a hardware structure plus a software module. The SDWAN-based data transmission device can be realized by a chip system, and the chip system can be formed by a chip and can also comprise the chip and other discrete devices. Referring to fig. 5, the SDWAN-based data transmission apparatus includes a communication module 501:

a communication module 501, configured to receive a route mapping table entry sent by a first access point POP; the route mapping table entry is generated by the first POP based on the mapping relation between the route information sent by Customer Premises Equipment (CPE) of a plurality of tenants and a target route, the target route is a route generated by the first POP and related to the address of the first POP, one tenant comprises at least one CPE, and one CPE sends one route information;

the communication module 501 is further configured to send the route mapping table entry to a second POP, so that the second POP acquires the route information based on the route mapping table entry and directs data transmission based on the route information; wherein the first and second POPs contain the same tenant.

Optionally, the communication module 501 is further configured to:

the SDWAN-based data transmission apparatus further includes a processing module 502, configured to:

updating the route mapping table entry based on the new route information;

the communication module 501 is further configured to:

and sending the updated route mapping table to the second POP.

Based on the same inventive concept, the embodiment of the application provides an SDWAN-based data transmission device, and the SDWAN-based data transmission device can realize the corresponding functions of the SDWAN-based data transmission method. The SDWAN-based data transfer device may be a hardware structure, a software module, or a hardware structure plus a software module. The SDWAN-based data transmission device can be realized by a chip system, and the chip system can be formed by a chip and can also comprise the chip and other discrete devices. Referring to fig. 6, the SDWAN-based data transmission apparatus includes a communication module 601 and a processing module 602. Wherein:

a communication module 601, configured to receive, by the POP, a target route sent by the route reflector and a route mapping table entry sent by the SDN controller; the target route is a route which is generated for a first POP and is related to the address of the target route, the first POP and a second POP contain the same tenant, the route mapping table entry is generated for the first POP based on the mapping relation between the route information sent by the customer premises equipment CPE of a plurality of tenants and the target route, one tenant comprises at least one CPE, and one CPE sends one route information;

a processing module 602, configured to obtain the routing information based on the target route and a route mapping table entry;

the processing module 602 is further configured to direct data transmission based on the routing information.

Optionally, the processing module 602 is further configured to:

All relevant contents of the steps involved in the foregoing embodiments of the SDWAN-based data transmission method can be cited to the functional description of the functional module corresponding to the SDWAN-based data transmission device in the embodiments of the present application, and are not described herein again.

The division of the modules in the embodiments of the present application is schematic, and is only a logical function division, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist alone physically, or two or more modules are integrated in one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Based on the same inventive concept, the embodiment of the application provides electronic equipment. Referring to fig. 7, the electronic device includes at least one processor 701 and a memory 702 connected to the at least one processor, in this embodiment, a specific connection medium between the processor 701 and the memory 702 is not limited, in fig. 7, the processor 701 and the memory 702 are connected through a bus 700 as an example, the bus 700 is represented by a thick line in fig. 7, and connection manners between other components are only schematically illustrated and not limited. The bus 700 may be divided into an address bus, a data bus, a control bus, etc., and is shown in fig. 7 with only one thick line for ease of illustration, but does not represent only one bus or type of bus.

In the embodiment of the present application, the memory 702 stores instructions executable by the at least one processor 701, and the at least one processor 701 may execute the steps included in the foregoing SDWAN-based data transmission method by executing the instructions stored in the memory 702.

The processor 701 is a control center of the electronic device, and may connect various parts of the whole electronic device by using various interfaces and lines, and perform various functions and process data of the electronic device by operating or executing instructions stored in the memory 702 and calling data stored in the memory 702, thereby performing overall monitoring on the electronic device. Alternatively, the processor 701 may include one or more processing units, and the processor 701 may integrate an application processor and a modem processor, wherein the application processor mainly handles operating systems, application programs, and the like, and the modem processor mainly handles wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 701. In some embodiments, processor 701 and memory 702 may be implemented on the same chip, or in some embodiments, they may be implemented separately on separate chips.

The processor 701 may be a general-purpose processor, such as a Central Processing Unit (CPU), a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like, that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the SDWAN-based data transmission method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

Memory 702, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The Memory 702 may include at least one type of storage medium, and may include, for example, a flash Memory, a hard disk, a multimedia card, a card-type Memory, a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Programmable Read Only Memory (PROM), a Read Only Memory (ROM), a charge Erasable Programmable Read Only Memory (EEPROM), a magnetic Memory, a magnetic disk, an optical disk, and so on. The memory 702 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory 702 in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function to store program instructions and/or data.

By programming the processor 701, the code corresponding to the SDWAN-based data transmission method described in the foregoing embodiment may be solidified into a chip, so that the chip can execute the steps of the SDWAN-based data transmission method when running.

Based on the same inventive concept, the embodiments of the present application further provide a computer-readable storage medium, which stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the steps of the SDWAN-based data transmission method as described above.

In some possible embodiments, the various aspects of the SDWAN-based data transmission method provided by the present application may also be implemented in the form of a program product comprising program code for causing a detection device to perform the steps in the SDWAN-based data transmission method according to various exemplary embodiments of the present application described above in this specification, when the program product is run on an electronic device.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A data transmission method based on an SDWAN (System wide area network), which is characterized by comprising the following steps:

a first access point POP receives routing information sent by Customer Premise Equipment (CPE) of a plurality of tenants; one tenant comprises at least one CPE, and one CPE sends one routing information;

establishing a mapping relation between the routing information and a target route, and generating a route mapping table item based on the mapping relation: the target route is a route which is generated by the first POP and is related to the self address;

2. The method of claim 1, wherein the target route is an EVPN type5 route, and wherein the establishing the mapping relationship between the route information and the target route comprises:

generating a plurality of EVPN type5 routes based on the route information sent by the CPEs of the plurality of tenants;

3. The method of claim 1, wherein the method further comprises:

4. A data transmission method based on an SDWAN (System wide area network), which is characterized by comprising the following steps:

receiving a routing mapping table item sent by a first access point POP; the route mapping table entry is generated by the first POP based on the mapping relation between the route information sent by Customer Premises Equipment (CPE) of a plurality of tenants and a target route, the target route is a route generated by the first POP and related to the address of the first POP, one tenant comprises at least one CPE, and one CPE sends one route information;

5. The method of claim 4, wherein the method further comprises:

updating the route mapping table entry based on the new route information;

and sending the updated route mapping table to the second POP.

6. A data transmission method based on an SDWAN (System wide area network), which is characterized by comprising the following steps:

a second access point POP receives a target route sent by a route reflector and a route mapping table item sent by a software defined network SDN controller; the target route is a route which is generated by a first POP and is related to the address of the target POP, the first POP and a second POP comprise the same tenant, the route mapping table item is generated by the first POP based on the mapping relation between the route information sent by the Customer Premise Equipment (CPE) of a plurality of tenants and the target route, one tenant comprises at least one CPE, and one CPE sends one route information;

directing data transmission based on the routing information.

7. The method of claim 6, wherein the method further comprises:

8. An apparatus for data transmission based on an SDWAN, applied to a first POP, the apparatus comprising:

the communication module is further used for sending the target route to a route reflector and sending the route mapping table item to a Software Defined Network (SDN) controller, so that the route reflector sends the target route to a second POP, and the SDN controller sends the route mapping table item to the second POP, and the second POP acquires the route information based on the target route and the route mapping table item and guides data transmission based on the route information; wherein the first and second POPs contain the same tenant.

9. An SDWAN-based data transmission apparatus applied to a Software Defined Network (SDN) controller, the apparatus comprising:

10. An SDWAN-based data transmission device, for use in a second POP, the device comprising:

the communication module is used for receiving a target route sent by the route reflector and a route mapping table item sent by the SDN controller by the POP; the target route is a route which is generated by a first POP and is related to the address of the target POP, the first POP and a second POP comprise the same tenant, the route mapping table item is generated by the first POP based on the mapping relation between the route information sent by the Customer Premise Equipment (CPE) of a plurality of tenants and the target route, one tenant comprises at least one CPE, and one CPE sends one route information;