WO2015066894A1

WO2015066894A1 - Forwarding plane migration method, controller, and gateway

Info

Publication number: WO2015066894A1
Application number: PCT/CN2013/086782
Authority: WO
Inventors: 周伟
Original assignee: 华为技术有限公司
Priority date: 2013-11-08
Filing date: 2013-11-08
Publication date: 2015-05-14
Also published as: CN104782173B; CN104782173A

Abstract

Embodiments of the present invention provide a forwarding plane migration method, a controller, and a gateway. The method comprises: selecting a forwarding plane to be switched; sending a stop command to a current forwarding plane; and after service information transmitted through the current forwarding plane is migrated to the forwarding plane to be switched, sending a start command to the forwarding plane to be switched to implement the migration of the forwarding plane. In the migration process of the forwarding plane, by selecting a forwarding plane to be switched, a controller sends a stop command to a current forwarding plane and at the same time, sends a start command to the forwarding plane to be switched, as to control the migration of the forwarding plane, and implement the separate migration of the forwarding plane in a network architecture in which the control plane is separated from the forwarding plane.

Description

Forwarding plane migration method, controller and gateway

The embodiments of the present invention relate to communication technologies, and in particular, to a forwarding plane migration method, a controller, and a gateway. Background technique

At present, with the rapid expansion of the Internet scale, the diversity and complexity of network services are becoming higher and higher, and a new network architecture concept is urgently needed to maintain the sustainable development of the Internet. Software Defined Network (SDN) based on OpenFlow technology and System Architecture Evolution (SAE) for Internet Protocol (IP), the fourth generation mobile communication (the 4th Generation) Mobile Communication, 4G) Born to the web.

The OpenFlow technology transforms the traditional physical fixed hardware into a dynamic and identifiable SDN, which realizes the separation of the control plane and the forwarding plane. The SAE network includes the access network and the core network. The key network elements in the core network include the mobility management entity ( Mobility Management Entity (MME), Servicing (S-GW), Packet Data Network Gateway (P-GW), where the MME completes the processing of control planes such as signaling, S-GW and P- GW is mainly responsible for the function of the forwarding plane. With the development of technology, various networks inevitably need to be integrated, that is, the SDN network architecture needs to be introduced into the SAE network. At this time, the logical control plane function and the forwarding plane function of the S-GW and the P-GW are separated. When the forwarding plane migration is required, the control plane will be attached to the corresponding forwarding plane to forward the data packets, that is, the forwarding plane is migrated.

However, in the architecture where the control plane and the forwarding plane are separated, the control plane and the forwarding plane are not always bound to be migrated at the same time. For example, in order to implement service switching, hot backup, etc., the control plane and the forwarding plane need to be separately performed. Migration; For example, in the scenario where the control plane is clouded, there is no need to simultaneously migrate the control plane and the forwarding plane. Summary of the invention

The embodiment of the invention provides a forwarding plane migration method, a controller and a gateway, and implements a control plane and forwarding In a separate network architecture, separate migration of forwarding planes.

In a first aspect, an embodiment of the present invention provides a forwarding plane migration method, including:

Select the forwarding surface to be switched;

Send a stop command to the current forwarding plane;

After the service information transmitted by the current forwarding plane is migrated to the to-be-switched forwarding plane, an enable command is sent to the to-be-switched forwarding plane to complete the migration of the forwarding plane.

In a first possible implementation manner of the first aspect, the selecting a forwarding plane to be migrated includes:

Selecting at least one to-be-switched forwarding plane for the current forwarding plane;

And after the sending of the stop command to the current forwarding plane, the method further includes: sending a primary forwarding plane flow table to the current forwarding plane and the at least one to-be-switched forwarding plane, where the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

Setting the primary forwarding surface flow table on the at least one to-be-switched forwarding plane to an inactive state; the sending a stop command to the current forwarding plane includes:

And sending, to the current forwarding plane, a stop command to stop using the primary forwarding plane flow table; and sending the enable command to the to-be-switched forwarding plane, including:

Sending an enable command for enabling the primary forwarding plane flow table to the at least one to-be-switched forwarding plane. With the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect, the sending, by the current forwarding plane, the at least one to-be-switched forwarding plane, a primary forwarding plane After the flow table is configured, before the at least one primary forwarding surface flow table to be switched on the forwarding plane is set to be inactive, the method further includes:

And sending an updated primary forwarding surface flow table to the current forwarding plane and the at least one to-be-switched forwarding plane.

In a third possible implementation manner of the first aspect, the selecting a forwarding plane to be migrated includes:

The sending a stop command to the current forwarding plane includes:

Sending, to the current forwarding plane, a stop command that carries the deletion information of the primary forwarding plane flow table, where the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

Sending an enable command to the to-be-switched forwarding plane includes: And sending, to the at least one to-be-switched forwarding plane, a startup command that carries the primary forwarding plane flow table. In a fourth possible implementation manner of the foregoing aspect, before the selecting the to-be-switched forwarding plane, the method further includes:

Obtain the master-slave relationship of the forwarding plane;

The selecting a forwarding plane to be switched includes:

And selecting, according to the master-slave relationship, at least one forwarding plane from the forwarding plane of the current forwarding plane as the to-be-switched forwarding plane.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the selecting, according to the master-slave relationship, selecting from a forwarding plane of the current forwarding plane After the at least one forwarding plane is used as the forwarding plane to be switched, before sending the stop command to the current forwarding plane, the method further includes:

Sending a migration command to the current forwarding plane, so that the current forwarding plane migrates the entire forwarding plane information to at least one to-be-switched forwarding plane, where the entire forwarding plane information includes at least a primary forwarding plane flow table, where the primary forwarding plane The forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the selecting, according to the master-slave relationship, from a forwarding plane of the current forwarding plane After the at least one forwarding plane is used as the forwarding plane to be switched, before sending the migration command to the current forwarding plane, the method further includes:

Sending a backup command to the current forwarding plane, so that the current forwarding plane periodically backs up the primary forwarding surface flow table to at least one of the to-be-switched forwarding planes.

With reference to the possible implementation of any one of the fourth to sixth aspects of the first aspect, in the seventh possible implementation of the first aspect, the obtaining the master-slave relationship of the forwarding plane includes:

Sending a master-slave configuration request to the current forwarding plane;

Receiving a master-slave configuration response sent by the current forwarding plane.

With the possible implementation of any one of the first to sixth aspects of the first aspect, in an eighth possible implementation manner of the first aspect, after the selecting the to-be-switched forwarding plane, the current forwarding plane is Before sending a stop command, it also includes:

Receiving a forwarding plane switching request sent by the current forwarding plane;

Transmitting a forwarding plane handover response to the current forwarding plane. In a second aspect, the embodiment of the present invention provides a forwarding plane migration method, where the forwarding plane is separated from the control plane, and the forwarding plane is a current forwarding plane, and the method includes:

Receiving a stop command sent by the controller;

Stopping the forwarding function of the current forwarding plane, so that after the controller migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane, sends an enable command to the to-be-switched forwarding plane to complete the forwarding plane migration. The to-be-switched forwarding plane is a forwarding plane of other gateways outside the gateway.

In a first possible implementation manner of the second aspect, before the stopping command sent by the receiving controller, the method further includes:

Receiving a primary forwarding plane flow table sent by the controller, where the primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

The stop command sent by the receiving controller includes:

Receiving a stop command sent by the controller to stop using the primary forwarding surface flow table.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, after receiving the primary forwarding plane flow table sent by the controller, the receiving controller sends the Before stopping the command, it also includes:

Receiving an updated primary forwarding plane flow table sent by the network controller.

In a third possible implementation manner of the second aspect, the stopping command sent by the receiving controller includes:

Receiving a stop command carrying the deletion information of the primary forwarding surface flow table.

In a fourth possible implementation manner of the second aspect, before the stopping command sent by the receiving controller, the method further includes:

Receiving the migration command sent by the controller, and migrating the entire forwarding plane information to the at least one to be switched forwarding plane, where the entire forwarding plane information includes at least a primary forwarding plane flow table, where the primary forwarding plane flow table is the current forwarding The forwarding rule of the service information transmitted on the surface.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, after receiving the migration command sent by the controller, before receiving the stop command sent by the controller , Also includes:

Receiving a backup instruction sent by the controller;

Switching to the at least one to-be-switched forwarding plane periodically to periodically report the entire forwarding plane information Backing up to the at least one forwarding plane to be switched.

With reference to the fourth or fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, before the receiving the migration command sent by the controller, the method further includes: receiving a master-slave configuration request sent by the controller;

A master-slave configuration response is sent to the controller.

With reference to the possible implementation of any one of the first to fifth aspects of the second aspect, in a seventh possible implementation manner of the first aspect, before the stopping command sent by the receiving controller, :

Sending a forwarding plane switching request to the controller;

Receiving a forwarding plane switching response sent by the controller.

In a third aspect, the embodiment of the present invention provides a forwarding plane migration method, where the forwarding plane is separated from the control plane, and the forwarding plane is a forwarding plane to be switched, and the method includes:

Receiving an enable command sent by the controller;

The forwarding function of the to-be-switched forwarding plane is enabled, so that after the controller migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane and sends a stop command to the current forwarding plane, the forwarding plane is completed. The migration, where the current forwarding plane is a forwarding plane of a gateway that needs to perform forwarding plane migration.

In a first possible implementation manner of the third aspect, before the enabling command sent by the receiving controller, the method further includes:

The enable command sent by the receiving controller includes:

Receiving an enable command sent by the controller to enable the primary forwarding plane flow table.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, before the receiving the primary forwarding surface flow table sent by the controller, the method further includes: An updated primary forwarding flow table sent by the controller.

In a third possible implementation manner of the third aspect, the enabling command sent by the receiving controller includes:

And receiving, by the controller, a start command that carries a primary forwarding plane flow table, where the primary forwarding plane flow table is a forwarding rule of the service information that is transmitted on the current forwarding plane. In a fourth possible implementation manner of the third aspect, before the enabling command sent by the receiving controller, the method further includes:

After the current forwarding plane receives the migration command sent by the controller, the entire forwarding plane information that is migrated by the current controller by using the handover mode is saved, where the entire forwarding plane information includes at least a primary forwarding plane flow table, where The primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

In a fourth aspect, an embodiment of the present invention provides a controller, including:

a selection module, configured to select a forwarding surface to be switched;

a first sending module, configured to send a stop command to the current forwarding plane;

a migration module, configured to migrate service information transmitted by the current forwarding plane to the to-be-switched forwarding plane selected by the selection module;

The second sending module is further configured to: after the migrating module migrates the service information transmitted by using the current forwarding plane to the to-be-switched forwarding plane selected by the selecting module, sending, to the to-be-switched forwarding plane, the sending Command to complete the migration of the forwarding face.

In a first possible implementation manner of the fourth aspect, the controller further includes: a third sending module and a processing module;

The selecting module is configured to select at least one to-be-switched forwarding plane for the current forwarding plane, where the third sending module is configured to send a primary forwarding plane to the current forwarding plane and the at least one to-be-switched forwarding plane a forwarding flow table of the primary forwarding plane is a forwarding rule of the service information transmitted on the current forwarding plane;

The processing module is configured to set a primary forwarding surface flow table of the at least one to-be-switched forwarding plane to an inactive state;

The first sending module is configured to send, to the current forwarding plane, a stop command to stop using the primary forwarding surface flow table;

The second sending module is configured to send an enable command for enabling the primary forwarding surface flow table to the at least one to-be-switched forwarding plane.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the third sending module is further configured to use the current forwarding plane and the at least one The forwarding forwarding plane sends an updated primary forwarding plane flow table.

In a third possible implementation manner of the fourth aspect, the selecting module is configured to The current forwarding plane selects at least one forwarding plane to be switched;

The first sending module is configured to send, to the current forwarding plane, a stop command that carries the information about the deletion of the primary forwarding plane flow table, where the primary forwarding plane flow table is the forwarding of the service information that is transmitted on the current forwarding plane. Rule

The second sending module is configured to send, to the at least one to-be-switched forwarding plane, a start command that carries the primary forwarding surface flow table.

In a fourth possible implementation manner of the fourth aspect, the controller further includes: an acquiring module, configured to acquire a master-slave relationship of the forwarding plane;

The selecting module is configured to select at least one forwarding plane from the forwarding plane of the current forwarding plane as the to-be-switched forwarding plane according to the master-slave relationship acquired by the acquiring module.

In conjunction with the fourth possible implementation of the fourth aspect, in a fifth possible implementation of the fourth aspect, the controller further includes:

a third sending module, configured to send a migration command to the current forwarding plane, so that the current forwarding plane migrates the entire forwarding plane information to at least one to-be-switched forwarding plane, where the entire forwarding plane information includes at least a primary forwarding The surface flow table, the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

With the fifth possible implementation of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the third sending module is further configured to send a backup command to the current forwarding plane, to And causing the current forwarding plane to periodically back up the primary forwarding plane flow table to at least one of the to-be-switched forwarding planes.

With reference to any one of the fourth to sixth possible implementations of the fourth aspect, in a seventh possible implementation of the fourth aspect, the acquiring module is configured to use the current forwarding plane Sending a master-slave configuration request, receiving a master-slave configuration response sent by the current forwarding plane.

In conjunction with the possible implementation of any one of the first to sixth aspects of the fourth aspect, in the eighth possible implementation of the fourth aspect, the controller further includes:

a receiving module, configured to receive a forwarding plane switching request sent by the current forwarding plane;

The first sending module is further configured to send a forwarding plane switching response to the current forwarding plane. According to a fifth aspect, the embodiment of the present invention provides a forwarding plane migration apparatus, where a forwarding plane is separated from a control plane, and the forwarding plane is a current forwarding plane, where the forwarding plane migration apparatus includes:

a first receiving module, configured to receive a stop command sent by the controller; a processing module, configured to stop the forwarding function of the current forwarding plane, to send an enable command to the to-be-switched forwarding plane after the controller migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane To complete the forwarding plane migration, where the to-be-switched forwarding plane is a forwarding plane of other gateways outside the gateway.

In a first possible implementation manner of the fifth aspect, the forwarding plane migration apparatus further includes: a second receiving module, configured to receive a primary forwarding plane flow table sent by the controller, where the primary forwarding plane stream The table is a forwarding rule of the service information transmitted on the current forwarding plane;

The first receiving module is configured to receive a stop command sent by the controller to stop using the primary forwarding surface flow table.

With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the second receiving module is further configured to receive an updated main sent by the network controller Forward the surface flow table.

In a third possible implementation manner of the fifth aspect, the first receiving module is configured to receive a stop command that carries the primary forwarding surface flow table deletion information.

In a fourth possible implementation manner of the fifth aspect, the forwarding plane migration apparatus further includes: a second receiving module, configured to receive a migration command sent by the controller, and migrate the entire forwarding plane information to at least one The forwarding plane is to be switched, and the entire forwarding plane information includes at least a primary forwarding plane flow table, where the primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the second receiving module is further configured to receive a backup instruction sent by the controller; The processing module is further configured to periodically switch to the at least one to-be-switched forwarding plane to periodically back up the entire forwarding plane information to the at least one to-be-switched forwarding plane.

With reference to the fourth or fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the first sending module is further included;

The first receiving module is further configured to receive a master-slave configuration request sent by the controller, where the first sending module is configured to send a master-slave configuration response to the controller.

With reference to any one of the first to the fifth possible implementation manners of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the second sending module is further included;

The second sending module is configured to send a forwarding plane switching request to the controller;

The first receiving module is configured to receive a forwarding plane switching response sent by the controller. According to a sixth aspect, the embodiment of the present invention provides a forwarding plane migration apparatus, where a forwarding plane is separated from a control plane, and the forwarding plane is a to-be-switched forwarding plane, and the forwarding plane migration apparatus includes:

a first receiving module, configured to receive an enable command sent by the controller;

a processing module, configured to enable the forwarding function of the to-be-switched forwarding plane, so that the controller migrates service information transmitted by the current forwarding plane to the to-be-switched forwarding plane and sends a stop command to the current forwarding plane Then, the forwarding plane migration is completed, where the current forwarding plane is a forwarding plane of a gateway that needs to perform forwarding plane migration.

In a first possible implementation manner of the sixth aspect, the device further includes:

a second receiving module, configured to receive a primary forwarding plane flow table sent by the controller, where the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

The first receiving module is configured to receive an enable command sent by the controller to enable the primary forwarding surface flow table.

With reference to the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the first receiving module is further configured to receive an updated primary forwarding sent by the controller Flow table.

In a third possible implementation manner of the sixth aspect, the first receiving module is further configured to receive a start command that is sent by the controller and that carries a primary forwarding plane flow table, where the primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

In a fourth possible implementation manner of the sixth aspect, the processing module is configured to: after the current forwarding plane receives the migration command sent by the controller, save the current controller to migrate by using a handover mode The entire forwarding plane information includes at least a primary forwarding plane flow table, where the primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

According to a seventh aspect, the embodiment of the present invention further provides a gateway, including the forwarding surface migration apparatus of any one of the first to seventh aspects of the fifth aspect, the fifth aspect, and/or the sixth The forwarding surface migration device of any one of the first to fourth aspects of the sixth aspect.

According to an eighth aspect, an embodiment of the present invention provides a controller, including: a processor and a memory, where the memory stores an execution instruction, and when the controller is running, the processor communicates with the memory, where Executing the execution instruction by the processor causes the controller to perform any of the first to eighth possible implementations of the first aspect, the first aspect.

A ninth aspect, an embodiment of the present invention provides a gateway, including: a processor and a memory, where The memory stores execution instructions, when the gateway is running, the processor communicates with the memory, and the processor executes the execution instruction to cause the gateway to perform the second aspect, the second aspect Any one of the first to the seventh possible implementations, and/or the third aspect, any one of the first to fourth aspects of the third aspect.

The forwarding plane migration method, the controller, and the gateway provided by the embodiment of the present invention, the controller sends the enable command to the to-be-switched forwarding plane by sending a stop command to the current forwarding plane by selecting the to-be-switched forwarding plane, thereby performing the migration of the forwarding plane. Control, which realizes the separate migration of the forwarding plane in the network architecture where the control plane and the forwarding plane are separated. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.

1 is a flowchart of Embodiment 1 of a forwarding plane migration method according to the present invention;

2 is a flowchart of Embodiment 2 of a method for forwarding a forwarding plane according to the present invention;

3 is a flowchart of Embodiment 3 of a method for forwarding a forwarding plane according to the present invention;

4 is a signaling diagram of Embodiment 4 of a method for forwarding a forwarding plane according to the present invention;

FIG. 5 is a signaling diagram of Embodiment 5 of a method for forwarding a forwarding plane according to the present invention;

6 is a signaling diagram of Embodiment 6 of a forwarding plane migration method according to the present invention;

7 is a signaling diagram of Embodiment 7 of a method for forwarding a forwarding plane according to the present invention;

8 is a signaling diagram of Embodiment 8 of a forwarding plane migration method according to the present invention;

9 is a schematic structural diagram of Embodiment 1 of a controller according to the present invention;

10 is a schematic structural diagram of Embodiment 2 of a controller according to the present invention;

FIG. 1 is a schematic structural diagram of Embodiment 1 of a migration plane forwarding device according to the present invention;

12 is a schematic structural diagram of Embodiment 2 of a forwarding plane migration apparatus according to the present invention;

13 is a schematic structural diagram of Embodiment 3 of a migration plane forwarding device according to the present invention;

14 is a schematic structural diagram of Embodiment 4 of a forwarding plane migration apparatus according to the present invention;

15 is a schematic structural diagram of Embodiment 3 of a controller according to the present invention; FIG. 16 is a schematic structural diagram of a control gateway according to the present invention. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a flowchart of Embodiment 1 of a method for forwarding a forwarding plane according to the present invention. The execution entity of this embodiment is a controller, which is applicable to a scenario in which the control plane and the forwarding plane are separated from each other, and the forwarding plane needs to be separately migrated. Specifically, the embodiment includes the following steps:

101. Select a forwarding plane to be switched.

When the SDN architecture is introduced into the SAE network, the control plane and the forwarding plane of the gateway can be separated, and the separated control plane forms an independent control plane with the control function of the MME, and the separated forwarding plane forms an independent forwarding plane, where The gateway may be, for example, an S-GW for completing forwarding and routing of packet data, or a P-GW connected to an external data network, or even a gateway deployed by the S-GW and the P-GW. In this embodiment, the forwarding plane of the gateway that needs to perform the forwarding plane migration is referred to as the current forwarding plane, and the forwarding plane of the gateway that is finally switched to is referred to as the forwarding plane to be switched, and the process of forwarding the forwarding plane is the service information. The process of migrating from the current forwarding plane to the forwarding plane to be switched.

In this step, when it is determined that the forwarding plane migration is required, for example, when the service information is heavy, the current forwarding plane determines that some services or all services need to be forwarded to the forwarding plane; or, the service switching, hot backup, etc. are required. In the function, the controller selects a forwarding plane to be switched, and the to-be-switched forwarding plane may be one or more.

102. Send a stop command to the current forwarding plane.

103. After the service information transmitted by the current forwarding plane is migrated to the to-be-switched forwarding plane, an enable command is sent to the to-be-switched forwarding plane to complete the migration of the forwarding plane.

In steps 102 and 103, after selecting the forwarding plane to be switched, the controller sends a stop command to the current forwarding plane, so that the current forwarding plane stops transmission of part or all of the service information, and at the same time, the controller sends the to-be-switched forwarding plane to enable. The command causes the to-be-switched forwarding plane to start transmitting part or all of the migrated service information. In the forwarding plane migration method provided by the embodiment of the present invention, the controller controls the migration of the forwarding plane by selecting a to-be-switched forwarding plane, sending a stop command to the current forwarding plane, and transmitting an enable command to the forwarding plane to be switched. Separate migration of forwarding planes in a network fabric with separate control planes and forwarding planes.

FIG. 2 is a flowchart of Embodiment 2 of a method for forwarding a forwarding plane according to the present invention. The execution entity of this embodiment is a gateway, and the forwarding plane is separated from the control plane, and the forwarding plane is a gateway of the current forwarding plane, and is applicable to a scenario in which the forwarding plane is separately migrated. Specifically, the embodiment includes the following steps:

201. Receive a stop command sent by the controller.

For the related concepts of the current forwarding plane, the to-be-switched forwarding plane, and the forwarding plane migration, refer to the embodiment in FIG. 1 , and details are not described herein again.

202. Stop the forwarding function of the current forwarding plane, so that the controller migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane, and then sends an enable command to the forwarding plane to be switched to complete the forwarding plane migration, where the forwarding is to be switched. The face is the forwarding plane of other gateways outside the gateway.

After receiving the stop command, the current forwarding plane stops the transmission of part or all of the service information, so that after the controller sends the enable command to the to-be-switched forwarding plane, part or all of the service information transmitted through the current forwarding plane is migrated to the to-be-switched forwarding. On the surface.

The forwarding plane migration method provided by the embodiment of the present invention needs to perform the current forwarding plane of the forwarding plane migration. After receiving the stop command sent by the controller, after the controller selects the to-be-switched forwarding plane and enables the forwarding plane to be switched, some or all of the stops are stopped. The forwarding function of the service information enables the separate migration of the forwarding plane in the network architecture where the control plane and the forwarding plane are separated under the control of the controller.

FIG. 3 is a flowchart of Embodiment 3 of a method for forwarding a forwarding plane according to the present invention. The execution entity of this embodiment is a gateway, and the forwarding plane is separated from the control plane, and the forwarding plane is a gateway to be switched to be forwarded, and is applicable to a scenario in which the forwarding plane to be migrated is separately migrated. Specifically, the embodiment includes the following steps:

301. Receive an enable command sent by the controller.

302. Enable the forwarding function of the to-be-switched forwarding plane, so that after the controller migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane and sends a stop command to the current forwarding plane, the forwarding plane migration is completed, where the current forwarding is performed. The face is the forwarding plane of the gateway that needs to perform forwarding plane migration. After receiving the enable command, the forwarding plane to be switched enables the forwarding function to transmit some or all of the service information transmitted by the current forwarding plane.

According to the forwarding plane migration method provided by the embodiment of the present invention, the selected forwarding to-be-switched forwarding plane transmits the partial or all service information transmitted by the current forwarding plane through the enable command sent by the receiving controller, thereby enabling the controller to Under control, a separate migration of the forwarding plane in the network architecture where the control plane and the forwarding plane are separated is implemented.

The above-mentioned FIG. 1, FIG. 2 and FIG. 3 respectively illustrate the present invention at the perspective of the controller, the current forwarding plane, and the forwarding plane to be switched. Hereinafter, the present invention will be described in detail from the interaction process of the three.

FIG. 4 is a signaling diagram of Embodiment 4 of a method for forwarding a forwarding plane according to the present invention. In this embodiment, the controller sends the service information to the forwarding plane to be switched while transmitting the service information to the current forwarding plane. Specifically, the embodiment includes the following steps:

401. The controller selects at least one forwarding plane to be switched for the current forwarding plane.

In this step, for the current forwarding plane, the controller selects at least one alternate to-be-switched forwarding plane for it.

402. The controller sends a primary forwarding surface flow table to the current forwarding plane and the at least one to-be-switched forwarding plane. In the SDN network, the controller searches for and forwards the packet by querying the flow table of the switch. The flow table is composed of a plurality of flow entries, and each flow entry is a forwarding rule. The flow table includes match field, counters, and instructions. Different vendors can design different flow tables according to their needs. The controller controls the flow table to achieve centralized control of the entire network.

After the SDN network architecture is introduced into the SAE network, service information, such as packet data, is forwarded through the gateway. Each service information has its own flow table. In this step, the controller sends a primary forwarding plane flow table to the current forwarding plane and the at least one to-be-switched forwarding plane, where the primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane, for example, part of the service information. Corresponding flow tables; or flow tables corresponding to all service information on the current forwarding plane. In the subsequent process, the primary forwarding plane flow table sent to the current forwarding plane needs to be sent to the forwarding plane to be switched, that is, the operations of adding a flow table, modifying the flow table, and deleting the flow table to the current forwarding plane, all need the same backup. Go to the forwarding plane to be switched. Specifically, the steps include the following sub-steps:

4041: The controller sends a primary forwarding surface flow table to the current forwarding plane. 4022. The controller sends a primary forwarding flow table to the to-be-switched forwarding plane.

It should be noted that, in this step, there may be multiple forwarding planes to be switched, and only one is shown in the figure.

403. Set the flow table status.

Specifically, the steps include the following steps:

4031. Set a primary forwarding surface flow table of the current forwarding plane to an active state.

4032. Set a primary forwarding surface flow table of the forwarding plane to be switched to an inactive state.

404. The user performs data transmission through the current forwarding plane.

405. Determine that the current forwarding plane needs to be migrated.

Whether the current forwarding plane needs to be migrated can be determined by the controller; or, it is determined by the current forwarding plane. Specifically, the steps include the following optional sub-steps:

4051. The controller determines that the forwarding plane needs to be migrated;

4052. The current forwarding plane determines that the forwarding plane needs to be migrated.

In this step, if the current forwarding plane needs to be migrated by the controller, execute 408; otherwise, if the current forwarding plane needs to be migrated by the current forwarding plane, then step 406 is performed.

406. The current forwarding sends a forwarding plane switching request to the controller.

407. The controller sends a forwarding plane switching response to the current forwarding plane.

408. The controller sends a stop command to stop using the primary forwarding surface flow table to the current forwarding plane.

In this step, the controller sends a stop command to notify the current forwarding plane to stop using the primary forwarding surface flow table. If the primary forwarding surface flow table is a combination of flow tables corresponding to all service information, the current forwarding plane stops forwarding. Features.

Optionally, the current forwarding plane may also stop forwarding after receiving the forwarding plane switching response.

409. The controller sends an enable command for enabling the primary forwarding plane flow table to the to-be-switched forwarding plane.

The controller sends an enable command to the to-be-switched forwarding plane, indicating that the to-be-switched forwarding plane enables the primary forwarding plane flow table that is the same as the current forwarding plane.

410. Set the flow table status.

In the foregoing steps 408 and 409, the controller sends a stop command to the current forwarding plane, indicating that the information of the current forwarding plane has been migrated; and sending an enable command to the to-be-switched forwarding plane, indicating that the forwarding forwarding plane enables the primary forwarding plane flow table. Specifically, the steps include the following steps:

4101: Set a primary forwarding surface flow table of the current forwarding plane to a standby state; 4102. Set a primary forwarding surface flow table of the forwarding plane to be switched to an active state.

Thereafter, the current forwarding plane enters a suspended state (can be stopped), and one or more forwarding surfaces to be switched complete the forwarding function of the current forwarding plane, thereby completing the migration process of the forwarding plane.

FIG. 5 is a signaling diagram of Embodiment 5 of a method for forwarding a forwarding plane according to the present invention. On the basis of the foregoing embodiment 4, the present embodiment introduces a process in which the controller needs to update the updated primary forwarding surface flow table to the to-be-switched forwarding plane after the current forwarding surface flow table of the current forwarding plane is updated. Specifically, the embodiment includes the following steps:

501. The controller selects at least one forwarding plane to be switched for the current forwarding plane.

502. The controller sends a primary forwarding surface flow table to the current forwarding plane and the at least one to-be-switched forwarding plane. Specifically, the steps include the following sub-steps:

5021. The controller sends a primary forwarding surface flow table to the current forwarding plane.

5022. The controller sends a primary forwarding flow table to the to-be-switched forwarding plane.

503. Set the flow table status.

Specifically, the steps include the following steps:

5031. Set a primary forwarding surface flow table of the current forwarding plane to an active state.

5032. Set a primary forwarding surface flow table of the forwarding plane to be switched to an inactive state.

504. The user performs data transmission through the current forwarding plane.

For the above steps 501 to 504, please refer to steps 401 to 404 in the embodiment of FIG. 4, and details are not described herein again.

5a. The controller interacts with the current forwarding plane for status information.

If the service information on the current forwarding plane is updated, and the updated service information is the service information that needs to be migrated to the forwarding plane to be switched, the controller exchanges state information with the current forwarding plane, and performs service information on the current forwarding plane. Update and update the main forwarding surface flow table.

5b. The controller sends an updated primary forwarding surface flow table to the current forwarding plane.

5c. The controller sends an updated primary forwarding plane flow table to the to-be-switched forwarding plane.

Through steps 5a to 5c, the service information between the current forwarding plane and the to-be-switched forwarding plane can be maintained, and the primary forwarding surface flow table of the service information to be migrated can be maintained to prevent the flow table from being changed.

505. Determine that the current forwarding plane needs to be migrated.

Specifically, the steps include the following optional sub-steps:

5051. The controller determines that the forwarding plane needs to be migrated;

5052. The current forwarding plane determines that the forwarding plane needs to be migrated. In this step, if the current forwarding plane needs to be migrated by the controller, step 508 is performed; otherwise, if the current forwarding plane needs to be migrated by the current forwarding plane, step 506 is performed.

506. The current forwarding sends a forwarding plane switching request to the controller.

507. The controller sends a forwarding plane switching response to the current forwarding plane.

508. The controller sends a stop to the current forwarding plane to stop using the updated primary forwarding surface flow table.

509. The controller sends an enable command of the primary forwarding surface flow table that is enabled to be updated to the to-be-switched forwarding plane. The controller sends an enable command to the to-be-switched forwarding plane, indicating that the to-be-switched forwarding plane enables the updated primary forwarding plane flow table that is the same as the current forwarding plane.

510. Set a flow table state.

Specifically, the steps include the following steps:

5101. Set a primary forwarding surface flow table that is updated by the current forwarding plane to a standby state.

5102. Set a primary forwarding plane flow table to be updated by the forwarding plane to be in an active state. Thereafter, the current forwarding plane enters a suspended state (can be stopped), and one or more forwarding surfaces to be switched complete the forwarding function of the current forwarding plane, thereby completing the migration process of the forwarding plane.

FIG. 6 is a signaling diagram of Embodiment 6 of a method for forwarding a forwarding plane according to the present invention. Different from the fourth embodiment and the fifth embodiment, in the embodiment 4 shown in FIG. 4 and the fifth embodiment shown in FIG. 5, the controller sends the service information to the current forwarding plane, and also sends the service information to the to-be-switched forwarding plane. The service information, in this embodiment, only when the current forwarding plane needs to be migrated, the controller sends the service information to the to-be-switched forwarding plane. Specifically, the embodiment includes the following steps:

601. Set the flow table status.

In this embodiment, there is no obvious master-slave relationship between the forwarding planes, and each forwarding provides a forwarding function for the service information transmitted through it. The primary forwarding surface flow table of the service information transmitted by the current forwarding plane is only saved on the current forwarding plane. The primary forwarding surface flow table is not saved on the other forwarding planes, and only one or more flow tables of its own related services are saved. Specifically, the steps include the following steps:

6011. Set a primary forwarding surface flow table of the current forwarding plane to an active state.

6012. Set one or more flow tables of the related service to be switched to the forwarding plane itself to an active state.

602. Determine that the current forwarding plane needs to be migrated. Whether the current forwarding plane needs to be migrated can be determined by the controller; or, it is determined by the current forwarding plane. Specifically, the steps include the following optional sub-steps:

6021. The controller determines that the forwarding plane needs to be migrated.

6022. The current forwarding plane determines that the forwarding plane needs to be migrated.

In this step, if the migration of the current forwarding plane is determined by the controller, then step 605 is performed; otherwise, if the current forwarding plane needs to be migrated by the current forwarding plane, then step 603 is performed.

603. The current forwarding sends a forwarding plane switching request to the controller.

604. The controller sends a forwarding plane switching response to the current forwarding plane.

605. The controller selects at least one to-be-switched forwarding plane for the current forwarding plane.

606. The controller sends a stop command that carries the information about deleting the primary forwarding surface flow table to the current forwarding plane. The controller sends a stop command to the current forwarding plane, where the stop command carries the deletion information of the primary forwarding plane flow table, and the current forwarding plane deletes the information according to the primary forwarding plane flow table, and deletes the flow table, that is, deletes the service information that needs to be migrated. Flow table.

607. The controller sends a start command that carries the primary forwarding surface flow table to the to-be-switched forwarding plane.

The controller sends the flow table of some or all of the service information of the current forwarding plane, that is, the primary forwarding surface flow table, to the to-be-switched forwarding plane, and the primary forwarding surface flow table may be one or more.

608. The controller sets a flow table state.

Specifically, the steps include the following steps:

6081. Set a primary forwarding surface flow table of the current forwarding plane to a standby state.

6082. Set a primary forwarding surface flow table of the forwarding plane to be switched to an active state.

In the embodiment shown in FIG. 4 and the embodiment shown in FIG. 5 and FIG. 6 , the flow table and related information of part or all of the service information transmitted through the current forwarding plane are migrated to the to-be-switched forwarding plane. , thereby achieving the migration of the forwarding surface. However, when the to-be-switched forwarding plane is implemented by using a virtual machine, the entire forwarding plane information of the current forwarding plane needs to be migrated to the forwarding plane to be switched. The entire forwarding plane information includes at least a primary forwarding surface flow table, environment information of a current forwarding plane, and the like. In the following, the present invention is further described in detail by using two embodiments in which a forwarding plane to be switched is implemented by a virtual machine. For details, refer to FIG. 7 and FIG. FIG. 7 is a signaling diagram of Embodiment 7 of a method for forwarding a forwarding plane according to the present invention. In this embodiment, the to-be-switched forwarding plane is implemented by using a virtual machine, and each forwarding plane has an explicit master-slave relationship. When the current forwarding plane needs to be migrated, the controller, the current forwarding plane, and the to-be-switched forwarding plane perform signaling. Interaction, thereby migrating the entire forwarding surface information to the forwarding surface to be switched.

For the sake of clarity of description, the current forwarding plane is referred to as the master forwarding plane, and the to-be-switched forwarding plane is referred to as the slave forwarding plane.

Specifically, the embodiment includes the following steps:

701. The controller acquires a master-slave relationship of the forwarding plane.

The master-slave relationship of the forwarding plane can be set by the controller or set by a third party such as Operation and Maintenance System (OAS) and saved on each forwarding plane.

In this step, if the master-slave relationship is set by the controller, after the master-slave relationship is set, step 704 is performed; otherwise, if the master-slave relationship is set by a third party, step 702 is performed.

702. The controller sends a master-slave configuration request to the primary forwarding plane.

703. The controller receives a master-slave configuration response sent by the primary forwarding plane.

The master-slave configuration response carries information about the slave forwarding plane of the primary forwarding plane.

704. Determine that the primary forwarding plane needs to be migrated.

The controller determines if the primary forwarding plane needs to be migrated.

It should be noted that whether the primary forwarding plane needs to be migrated may also be determined by the primary forwarding plane itself. For details, refer to the fourth embodiment of FIG. 4, and details are not described herein again.

705. The controller selects at least one forwarding plane to be switched as a primary forwarding plane.

Specifically, the controller selects at least one forwarding plane from the forwarding plane of the primary forwarding plane as the to-be-switched forwarding plane according to the master-slave relationship.

706. The controller sends a migration command to the primary forwarding plane.

The controller sends a handover command to the primary forwarding plane, so that the primary forwarding plane is switched to the secondary forwarding plane by using the switching mode, that is, the entire forwarding plane information is migrated to at least one secondary forwarding plane, and the entire forwarding plane information includes at least a primary forwarding surface flow table, The forwarding surface flow table is a forwarding rule for the service information transmitted on the current forwarding plane.

707. The primary forwarding plane migrates the entire forwarding plane information to the secondary forwarding plane.

708. Forward the forwarding surface information from the forwarding storage surface.

In this step, after receiving the migration command sent by the controller on the primary forwarding plane, save from the forwarding plane. The entire forwarding plane information that is transferred by the primary forwarding plane through the switching mode. The entire forwarding plane information includes at least a primary forwarding plane flow table, and the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the primary forwarding plane.

709. The controller sets a flow table state.

Specifically, the steps include the following steps:

7091, setting a primary forwarding surface flow table of the primary forwarding plane to a standby state;

7092: Set the primary forwarding surface flow table from the forwarding plane to the active state.

Thereafter, the forwarding plane enters the suspended state (can be stopped), and the forwarding function of the primary forwarding plane is completed by one or more forwarding planes, thereby completing the migration process of the forwarding plane.

FIG. 8 is a signaling diagram of Embodiment 8 of a forwarding plane migration method according to the present invention. This embodiment introduces a process of regular backup on the basis of the above-mentioned seventh embodiment. Specifically, the embodiment includes the following steps:

801. The controller acquires a master-slave relationship of the forwarding plane.

802. The controller sends a master-slave configuration request to the primary forwarding plane.

803. The controller receives a master-slave configuration response sent by the primary forwarding plane.

For the above steps 801 to 803, reference may be made to steps 701 to 703 of the seventh embodiment of FIG. 7, and details are not described herein again. 8a. The controller sends a backup command to the primary forwarding plane.

In this step, the controller periodically initiates a backup command to the primary forwarding plane, indicating that the primary forwarding plane periodically performs backup on the forwarding plane.

8b. The primary forwarding plane periodically switches to the forwarding plane to be switched.

In this step, the primary forwarding plane periodically switches to at least one to-be-switched forwarding plane, and the entire forwarding plane information is periodically backed up to at least one to-be-switched forwarding plane by periodically performing online migration but not switching.

8c. Regularly back up the entire forwarding surface information from the forwarding plane.

804. Determine that the primary forwarding plane needs to be migrated.

805. The controller selects at least one forwarding plane to be switched as the primary forwarding plane.

806. The controller sends a stop command to the primary forwarding plane.

The controller sends a stop command to the primary forwarding plane, so that the primary forwarding stops forwarding function for all or part of the service information.

807. The controller sends an enable command to the forwarding plane.

808. The controller sets a flow table state.

Specifically, the steps include the following steps:

8081: Set a primary forwarding surface flow table of the primary forwarding plane to a standby state; 8082. Set the flow table of the primary forwarding plane from the forwarding plane to the active state.

It should be noted that, in the foregoing embodiments shown in FIG. 4, FIG. 5, and FIG. 6, only the service-related information needs to be migrated to implement the migration of the forwarding plane, and in the embodiment shown in FIG. 7 and FIG. The forwarding plane is implemented by the virtual machine. The entire forwarding plane information of the current forwarding plane, such as the primary forwarding plane flow table and the running environment of the current forwarding plane, are migrated to the forwarding plane, that is, the forwarding plane to be switched. Since the entire forwarding plane information is relatively large, the embodiments shown in Figs. 4, 5 and 6 can reduce the delay in the forwarding plane migration process with respect to the embodiment shown in Figs. 7 and 8.

FIG. 9 is a schematic structural diagram of Embodiment 1 of the controller of the present invention. The controller provided in this embodiment is an apparatus embodiment corresponding to the embodiment of FIG. 1 of the present invention, and the specific implementation process is not described herein again. Specifically, the controller 100 provided in this embodiment specifically includes:

The selecting module 11 is configured to select a forwarding plane to be switched;

The first sending module 12 is configured to send a stop command to the current forwarding plane;

The migration module 13 is configured to migrate the service information transmitted by the current forwarding plane to the forwarding plane to be switched selected by the selecting module 11;

The second sending module 13 is further configured to: after the migration module 13 migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane selected by the selecting module 11, sends an enable command to the to-be-switched forwarding plane to complete the migration of the forwarding plane. .

The controller provided by the embodiment of the present invention controls the migration of the forwarding plane by selecting a to-be-switched forwarding plane and sending a stop command to the current forwarding plane, thereby implementing control plane and forwarding plane. Separate migration of forwarding planes in a separate network architecture.

FIG. 10 is a schematic structural diagram of Embodiment 2 of a controller according to the present invention. As shown in FIG. 10, the controller 200 of this embodiment further comprises: a third transmitting module 15 and a processing module 16 on the basis of the device structure of FIG.

The selecting module 11 is configured to select at least one to-be-switched forwarding plane for the current forwarding plane;

The third sending module 15 is configured to send a primary forwarding surface flow table to the current forwarding plane and the at least one to-be-switched forwarding plane, where the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

The processing module 16 is configured to set the primary forwarding surface flow table of the at least one to-be-switched forwarding plane to an inactive state; The first sending module 12 is configured to send, to the current forwarding plane, a stop command to stop using the primary forwarding surface flow table;

The second sending module 13 is configured to send an enable command for enabling the primary forwarding surface flow table to the at least one forwarding plane to be switched.

Further, the third sending module 15 is further configured to send an updated primary forwarding surface flow table to the current forwarding plane and the at least one to-be-switched forwarding plane.

Further, the selection module 11 is configured to select at least one to-be-switched forwarding plane for the current forwarding plane. The first sending module 12 is configured to send a stop command carrying the deletion information of the primary forwarding plane flow table to the current forwarding plane, and the primary forwarding plane The flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

The second sending module 13 is configured to send, to the at least one to-be-switched forwarding plane, a start command that carries the primary forwarding surface flow table.

Referring again to FIG. 10, the controller 200 further includes:

The obtaining module 17 is configured to obtain a master-slave relationship of the forwarding plane;

The selecting module 11 is configured to select at least one forwarding plane from the forwarding plane of the current forwarding plane as the to-be-switched forwarding plane according to the master-slave relationship acquired by the obtaining module 17.

Referring again to FIG. 10, the controller 200 further includes:

The third sending module 15 is configured to send a migration command to the current forwarding plane, so that the current forwarding plane migrates the entire forwarding plane information to at least one to-be-switched forwarding plane, and the entire forwarding plane information includes at least a primary forwarding plane flow table, and a primary forwarding plane. The flow table is a forwarding rule for the service information transmitted on the current forwarding plane.

Further, the third sending module 15 is further configured to send a backup command to the current forwarding plane, so that the current forwarding plane periodically backs up the primary forwarding surface flow table to at least one to-be-switched forwarding plane.

Further, the obtaining module 17 is configured to send a master-slave configuration request to the current forwarding plane, and receive a master-slave configuration response sent by the current forwarding plane.

Referring to FIG. 10, the controller 200 further includes: a receiving module 18, configured to receive a forwarding plane switching request sent by the current forwarding plane;

The first sending module 12 is further configured to send a forwarding plane switching response to the current forwarding plane.

FIG. 11 is a schematic structural diagram of Embodiment 1 of the migration plane forwarding device of the present invention. The migration plane forwarding device provided in this embodiment is an apparatus embodiment corresponding to the embodiment of FIG. 2 of the present invention, and details of the implementation process are not described herein again. Specifically, in the migration plane forwarding apparatus 300, the forwarding plane is separated from the control plane, and the forwarding plane is the current forwarding plane. The forwarding plane migration apparatus 300 includes: The first receiving module 21 is configured to receive a stop command sent by the controller.

The processing module 22 is configured to stop the forwarding function of the current forwarding plane, so that after the controller migrates the service information transmitted by the current forwarding plane to the forwarding plane to be switched, an enable command is sent to the forwarding plane to be switched to complete the forwarding plane migration, where The forwarding plane to be switched is the forwarding plane of other gateways other than the gateway.

The forwarding plane migration apparatus provided by the embodiment of the present invention needs to perform the current forwarding plane of the forwarding plane migration, and stops the part or all after the controller selects the to-be-switched forwarding plane and enables the forwarding plane to be switched, by receiving the stop command sent by the controller. The forwarding function of the service information enables the separate migration of the forwarding plane in the network architecture where the control plane and the forwarding plane are separated under the control of the controller.

FIG. 12 is a schematic structural diagram of Embodiment 2 of the forwarding plane migration apparatus according to the present invention. The forwarding plane migration apparatus 400 of the present embodiment further includes:

The second receiving module 23 is configured to receive a primary forwarding surface flow table sent by the controller, where the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

The first receiving module 21 is configured to receive, by the controller, the stop of using the primary forwarding surface flow table, and the second receiving module 23 is further configured to receive the updated primary forwarding surface flow table sent by the network controller.

Further, the first receiving module 21 is configured to receive a stop command that carries the deletion information of the primary forwarding surface flow table.

Further, the second receiving module 23 is configured to receive a migration command sent by the controller, and migrate the entire forwarding plane information to at least one to be switched forwarding plane, where the entire forwarding plane information includes at least a primary forwarding plane flow table, and a primary forwarding surface stream. The table is the forwarding rule of the service information transmitted on the current forwarding plane.

Further, the second receiving module 23 is further configured to receive a backup instruction sent by the controller; the processing module 22 is further configured to periodically switch to at least one to-be-switched forwarding plane to periodically back up the entire forwarding plane information to at least one to-be-backed Switch the forwarding plane.

Referring again to Figure 12, the forwarding surface migration device 400 further includes a first transmitting module 24;

The first receiving module 21 is further configured to receive a master-slave configuration request sent by the controller;

The first sending module 24 is configured to send a master-slave configuration response to the controller.

Referring again to Figure 12, the forwarding surface migration device 400 further includes a second transmitting module 25;

a second sending module 25, configured to send a forwarding plane switching request to the controller;

The first receiving module 21 is configured to receive a forwarding plane switching response sent by the controller. FIG. 13 is a schematic structural diagram of Embodiment 3 of the migration plane forwarding apparatus according to the present invention. The migration plane forwarding apparatus provided in this embodiment is an apparatus embodiment corresponding to the embodiment of FIG. 3 of the present invention, and details of the implementation process are not described herein again. Specifically, in the migration plane forwarding device 500, the forwarding plane is separated from the control plane, and the forwarding plane is a forwarding plane to be switched. The forwarding plane migration apparatus 500 includes:

The first receiving module 31 is configured to receive an enable command sent by the controller.

The processing module 32 is configured to enable the forwarding function of the forwarding plane to be switched, so that after the controller migrates the service information transmitted by the current forwarding plane to the to-be-switched forwarding plane and sends a stop command to the current forwarding plane, the forwarding plane migration is completed. The current forwarding plane is the forwarding plane of the gateway that needs to perform forwarding plane migration.

The forwarding plane migration apparatus provided by the embodiment of the present invention, the selected forwarding forwarding plane sends an activation command sent by the receiving controller, and enables the forwarding function to transmit part or all of the service information transmitted by the current forwarding plane, thereby being Under control, a separate migration of the forwarding plane in the network architecture where the control plane and the forwarding plane are separated is implemented.

FIG. 14 is a schematic structural diagram of Embodiment 4 of the forwarding plane migration apparatus according to the present invention. The forwarding plane migration apparatus 600 of the present embodiment further includes:

The second receiving module 33 is configured to receive a primary forwarding plane flow table sent by the controller, where the primary forwarding plane flow table is a forwarding rule of the service information transmitted on the current forwarding plane;

The first receiving module 31 is configured to receive an enable command sent by the controller to enable the primary forwarding surface flow table. Further, the first receiving module 31 is further configured to receive an updated primary forwarding flow table sent by the controller.

Further, the first receiving module 31 is further configured to receive, by the controller, a start command that carries a flow table of the primary forwarding plane, where the primary forwarding surface flow table is a forwarding rule of the service information transmitted on the current forwarding plane.

Further, the processing module 32 is configured to save, after the current forwarding plane receives the migration command sent by the controller, the entire forwarding plane information that is migrated by the current controller by using the handover mode, where the entire forwarding plane information includes at least a primary forwarding surface flow table. The primary forwarding plane flow table is a forwarding rule for the service information transmitted on the current forwarding plane.

The embodiment of the present invention further provides a gateway, including the forwarding plane migration apparatus shown in FIG. 11 or FIG. 12, and/or the forwarding plane migration apparatus as shown in FIG. 13 or FIG. Let me repeat.

FIG. 15 is a schematic structural diagram of Embodiment 3 of a controller according to the present invention. As shown in FIG. 15, this embodiment The controller 700 is provided to include a processor 71 and a memory 72. The controller 700 can also include a transmitter 73, a receiver 74. Transmitter 73 and receiver 74 can be coupled to processor 71. The memory 72 stores execution instructions. When the controller 700 is running, the processor 71 communicates with the memory 72. The processor 71 calls the execution instructions in the memory 72 for executing the method embodiment shown in FIG. Similar to the technical effect, it will not be described here.

FIG. 16 is a schematic structural diagram of a control gateway according to the present invention. As shown in FIG. 16, the gateway 800 provided in this embodiment includes a processor 81 and a memory 82. The gateway 800 can also include a transmitter 83, a receiver 84. Transmitter 83 and receiver 84 can be coupled to processor 81. The memory 82 stores execution instructions. When the gateway 800 is running, the processor 81 communicates with the memory 82. The processor 81 calls the execution instructions in the memory 82 for executing FIG. 2, and/or the method shown in FIG. The implementation principle and technical effects of the embodiments are similar, and are not described herein again.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be implemented by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, when executed, The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A forwarding plane migration method, characterized by including:

Select the forwarding plane to be switched;

Send a stop command to the current forwarding plane;

After migrating the service information transmitted through the current forwarding plane to the forwarding plane to be switched, an enabling command is sent to the forwarding plane to be switched to complete the migration of the forwarding plane.

2. The method according to claim 1, characterized in that the selecting the forwarding plane to be migrated includes:

Select at least one forwarding plane to be switched for the current forwarding plane;

After the forwarding plane to be switched is selected and before sending a stop command to the current forwarding plane, the method further includes: sending a main forwarding plane flow table to the current forwarding plane and the at least one forwarding plane to be switched, the main forwarding plane flow table being It is the forwarding rule of the service information transmitted on the current forwarding plane;

Setting the main forwarding plane flow table of the at least one forwarding plane to be switched to an inactive state; sending a stop command to the current forwarding plane includes:

Sending a stop command to the current forwarding plane to stop using the flow table of the main forwarding plane; Sending an enable command to the forwarding plane to be switched includes:

Send an enabling command for enabling the main forwarding plane flow table to the at least one forwarding plane to be switched.

3. The method according to claim 2, characterized in that, after sending the main forwarding plane flow table to the current forwarding plane and the at least one forwarding plane to be switched, the at least one forwarding plane to be switched is Before the main forwarding surface flow table is set to inactive, it also includes:

Send an updated main forwarding plane flow table to the current forwarding plane and the at least one forwarding plane to be switched.

4. The method according to claim 1, wherein the selecting the forwarding plane to be migrated includes:

Sending a stop command to the current forwarding plane includes:

Send a stop command carrying main forwarding plane flow table deletion information to the current forwarding plane, where the main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane;

The sending of an enabling command to the forwarding plane to be switched includes:

Send a start command carrying the main forwarding plane flow table to the at least one forwarding plane to be switched.

5. The method according to claim 1, characterized in that before selecting the forwarding plane to be switched, the method further includes:

Obtain the master-slave relationship of the forwarding surface;

The selection of the forwarding plane to be switched includes:

According to the master-slave relationship, at least one forwarding plane is selected from the slave forwarding planes of the current forwarding plane as the forwarding plane to be switched.

6. The method according to claim 5, characterized in that, according to the master-slave relationship, after selecting at least one forwarding plane from the slave forwarding planes of the current forwarding plane as the forwarding plane to be switched, forward to the current forwarding plane. Before sending the stop command above, also include:

Send a migration command to the current forwarding plane, so that the current forwarding plane migrates the entire forwarding plane information to at least one of the forwarding planes to be switched, where the entire forwarding plane information at least includes a main forwarding plane flow table, and the main forwarding plane The forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane.

7. The method according to claim 6, characterized in that, after selecting at least one forwarding plane from the slave forwarding planes of the current forwarding plane as the forwarding plane to be switched according to the master-slave relationship, Before the current forwarding plane sends the migration command, it also includes:

Send a backup command to the current forwarding plane, so that the current forwarding plane regularly backs up the main forwarding plane flow table to at least one of the forwarding planes to be switched.

8. The method according to any one of claims 5 to 7, characterized in that said obtaining the master-slave relationship of the forwarding plane includes:

Send a master-slave configuration request to the current forwarding plane;

Receive the master-slave configuration response sent by the current forwarding plane.

9. The method according to any one of claims 2 to 7, characterized in that, after selecting the forwarding plane to be switched and before sending a stop command to the current forwarding plane, it further includes:

Receive the forwarding plane switching request sent by the current forwarding plane;

Send a forwarding plane switching response to the current forwarding plane.

10. A forwarding plane migration method, characterized in that it is suitable for a gateway that separates the forwarding plane and the control plane, and the forwarding plane is the current forwarding plane. The method includes:

Receive the stop command sent by the controller;

Stop the forwarding function of the current forwarding plane, so that the controller will pass the current forwarding plane After the service information transmitted by the forwarding plane is migrated to the forwarding plane to be switched, an enabling command is sent to the forwarding plane to be switched to complete the forwarding plane migration, wherein the forwarding plane to be switched is the forwarding plane of another gateway other than the gateway.

11. The method according to claim 10, characterized in that, before receiving the stop command sent by the controller, it further includes:

Receive the main forwarding plane flow table sent by the controller, where the main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane;

The receiving stop command sent by the controller includes:

Receive a stop command sent by the controller to stop using the main forwarding surface flow table.

12. The method according to claim 11, characterized in that after receiving the main forwarding surface flow table sent by the controller and before receiving the stop command sent by the controller, it further includes:

Receive an updated primary forwarding surface flow table sent by the network controller.

13. The method according to claim 10, characterized in that receiving the stop command sent by the controller includes:

Receive the stop command carrying the deletion information of the main forwarding surface flow table.

14. The method according to claim 10, characterized in that, before receiving the stop command sent by the controller, it further includes:

Receive a migration command sent by the controller, and migrate the entire forwarding plane information to at least one forwarding plane to be switched. The entire forwarding plane information at least includes a main forwarding plane flow table, and the main forwarding plane flow table is the current forwarding plane. Forwarding rules for the service information transmitted on the plane.

15. The method according to claim 14, characterized in that after receiving the migration command sent by the controller and before receiving the stop command sent by the controller, it further includes:

Receive backup instructions sent by the controller;

Regularly switch to the at least one forwarding plane to be switched, so as to regularly back up the entire forwarding plane information to the at least one forwarding plane to be switched.

16. The method according to claim 14 or 15, characterized in that before receiving the migration command sent by the controller, it further includes:

Receive the master-slave configuration request sent by the controller;

Send a master-slave configuration response to the controller.

17. The method according to any one of claims 11 to 15, characterized in that: the receiving control Before the stop command sent by the controller, it also includes:

Send a forwarding plane switching request to the controller;

Receive the forwarding plane switching response sent by the controller.

18. A forwarding plane migration method, characterized in that it is suitable for gateways in which the forwarding plane and the control plane are separated, and the forwarding plane is the forwarding plane to be switched. The method includes:

Receive the enable command sent by the controller;

Enable the forwarding function of the forwarding plane to be switched, so that after the controller migrates the service information transmitted through the current forwarding plane to the forwarding plane to be switched and sends a stop command to the current forwarding plane, the forwarding plane is completed Migration, wherein the current forwarding plane is the forwarding plane of the gateway that needs to migrate the forwarding plane.

19. The method according to claim 18, characterized in that, before receiving the enable command sent by the controller, it further includes:

The receiving enable command sent by the controller includes:

Receive an enabling command sent by the controller to enable the main forwarding surface flow table.

20. The method according to claim 19, characterized in that before receiving the main forwarding surface flow table sent by the controller, it further includes:

Receive the updated primary forwarding flow table sent by the controller.

21. The method according to claim 18, characterized in that the receiving the enable command sent by the controller includes:

Receive a start command sent by the controller carrying a main forwarding plane flow table. The main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane.

22. The method according to claim 18, characterized in that, before receiving the enable command sent by the controller, it further includes:

After the current forwarding plane receives the migration command sent by the controller, the entire forwarding plane information migrated by the current controller through switching is saved, and the entire forwarding plane information at least includes the main forwarding plane flow table, The main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane.

23. A controller, characterized in that it includes: Selection module, used to select the forwarding plane to be switched;

The first sending module is used to send a stop command to the current forwarding plane;

A migration module, configured to migrate the service information transmitted through the current forwarding plane to the to-be-switched forwarding plane selected by the selection module;

The second sending module is also configured to send enablement to the forwarding plane to be switched after the migration module migrates the service information transmitted through the current forwarding plane to the forwarding plane to be switched selected by the selection module. command to complete the forwarding plane migration.

24. The controller according to claim 23, wherein the controller further includes: a third sending module and a processing module;

The selection module is used to select at least one forwarding plane to be switched for the current forwarding plane; the third sending module is used to send a main forwarding plane flow to the current forwarding plane and the at least one forwarding plane to be switched. Table, the main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane;

The processing module is configured to set the main forwarding plane flow table of the at least one forwarding plane to be switched to an inactive state;

The first sending module is configured to send a stop command to stop using the main forwarding plane flow table to the current forwarding plane;

The second sending module is configured to send an enabling command for activating the main forwarding plane flow table to the at least one forwarding plane to be switched.

25. The controller according to claim 24, characterized in that,

The third sending module is also configured to send an updated main forwarding plane flow table to the current forwarding plane and the at least one forwarding plane to be switched.

26. The controller according to claim 23, characterized in that,

The selection module is used to select at least one forwarding plane to be switched for the current forwarding plane; the first sending module is used to send a stop command carrying the main forwarding plane flow table deletion information to the current forwarding plane, so The main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane;

The second sending module is configured to send a start command carrying the main forwarding plane flow table to the at least one forwarding plane to be switched.

27. The controller according to claim 23, characterized in that, the controller further includes: Acquisition module, used to obtain the master-slave relationship of the forwarding plane;

The selection module is configured to select at least one forwarding plane from the slave forwarding planes of the current forwarding plane as the forwarding plane to be switched based on the master-slave relationship obtained by the acquisition module.

28. The controller according to claim 27, wherein the controller further includes: a third sending module, configured to send a migration command to the current forwarding plane, so that the current forwarding plane forwards the entire The plane information is migrated to at least one of the forwarding planes to be switched. The entire forwarding plane information at least includes a main forwarding plane flow table. The main forwarding plane flow table is the forwarding rule of the business information transmitted on the current forwarding plane. .

29. The controller according to claim 28, characterized in that,

The third sending module is also configured to send a backup command to the current forwarding plane, so that the current forwarding plane regularly backs up the main forwarding plane flow table to at least one of the forwarding planes to be switched.

30. The controller according to any one of claims 27 to 29, characterized in that,

The acquisition module is configured to send a master-slave configuration request to the current forwarding plane, and receive a master-slave configuration response sent by the current forwarding plane.

31. The controller according to any one of claims 24 to 29, characterized in that the controller further includes:

A receiving module, configured to receive the forwarding plane switching request sent by the current forwarding plane;

The first sending module is also configured to send a forwarding plane switching response to the current forwarding plane.

32. A forwarding plane migration device, characterized in that the forwarding plane is separated from the control plane, the forwarding plane is the current forwarding plane, and the forwarding plane migration device includes:

The first receiving module is used to receive the stop command sent by the controller;

A processing module configured to stop the forwarding function of the current forwarding plane, thereby sending an enabling command to the forwarding plane to be switched after the controller migrates the business information transmitted through the current forwarding plane to the forwarding plane to be switched. To complete the forwarding plane migration, the forwarding plane to be switched is the forwarding plane of another gateway other than the gateway.

33. The forwarding plane migration device according to claim 32, characterized in that the forwarding plane migration device further includes:

The second receiving module is configured to receive the main forwarding surface flow table sent by the controller, where the main forwarding surface flow table is the forwarding rule of the business information transmitted on the current forwarding surface;

The first receiving module is configured to receive a message sent by the controller to stop using the main forwarding plane. The stop command of the flow table.

34. The forwarding plane migration device according to claim 33, characterized in that,

The second receiving module is also configured to receive the updated main forwarding surface flow table sent by the network controller.

35. The forwarding plane migration device according to claim 32, characterized in that,

The first receiving module is configured to receive a stop command carrying main forwarding plane flow table deletion information.

36. The forwarding plane migration device according to claim 32, characterized in that the forwarding plane migration device further includes:

The second receiving module is configured to receive the migration command sent by the controller and migrate the entire forwarding plane information to at least one forwarding plane to be switched. The entire forwarding plane information at least includes a main forwarding plane flow table. The main forwarding plane The flow table is the forwarding rule of the service information transmitted on the current forwarding plane.

37. The forwarding plane migration device according to claim 36, characterized in that,

The second receiving module is also used to receive the backup instruction sent by the controller;

The processing module is also configured to regularly switch to the at least one forwarding plane to be switched, so as to regularly back up the entire forwarding plane information to the at least one forwarding plane to be switched.

38. The forwarding plane migration device according to claim 36 or 37, further comprising a first sending module;

The first receiving module is further configured to receive a master-slave configuration request sent by the controller; and the first sending module is configured to send a master-slave configuration response to the controller.

39. The forwarding plane migration device according to any one of claims 33 to 37, further comprising a second sending module;

The second sending module is used to send a forwarding plane switching request to the controller;

The first receiving module is configured to receive a forwarding plane switching response sent by the controller.

40. A forwarding plane migration device, characterized in that the forwarding plane is separated from the control plane, the forwarding plane is the forwarding plane to be switched, and the forwarding plane migration device includes:

The first receiving module is used to receive the enabling command sent by the controller;

A processing module configured to enable the forwarding function of the forwarding plane to be switched, so that the controller migrates the business information transmitted through the current forwarding plane to the forwarding plane to be switched and sends a stop command to the current forwarding plane. After that, the forwarding plane migration is completed, wherein the current forwarding plane is the forwarding plane of the gateway that needs to perform forwarding plane migration.

41. The forwarding plane migration device according to claim 40, further comprising: a second receiving module, configured to receive the main forwarding plane flow table sent by the controller, and the main forwarding plane flow table is the main forwarding plane flow table. Describe the forwarding rules of the service information currently transmitted on the forwarding plane;

The first receiving module is configured to receive an enabling command sent by the controller to enable the main forwarding surface flow table.

42. The forwarding plane migration device according to claim 41, wherein the first receiving module is further configured to receive the updated main forwarding flow table sent by the controller.

43. The forwarding plane migration device according to claim 40, characterized in that,

The first receiving module is also configured to receive a start command carrying a main forwarding plane flow table sent by the controller. The main forwarding plane flow table is the forwarding rule of the business information transmitted on the current forwarding plane. .

44. The forwarding plane migration device according to claim 40, characterized in that,

The processing module is configured to save the entire forwarding plane information migrated by the current controller through switching after the current forwarding plane receives the migration command sent by the controller. The entire forwarding plane information includes at least the main Forwarding plane flow table, the main forwarding plane flow table is the forwarding rule of the service information transmitted on the current forwarding plane.

45. A gateway, characterized in that it includes a migration plane forwarding device as described in any one of claims 32 to 39, and/or a migration plane forwarding device as described in any one of claims 40 to 44. device.

46. A controller, characterized in that it includes: a processor and a memory, the memory stores execution instructions, when the controller is running, the processor communicates with the memory, and the processor executes The execution instructions cause the controller to execute the method according to any one of claims 1 to 9.

47. A gateway, characterized in that it includes: a processor and a memory, the memory stores execution instructions, when the gateway is running, the processor communicates with the memory, and the processor executes the Executing the instructions causes the gateway to perform the method as claimed in any one of claims 10 to 17, and/or as claimed in any one of claims 18 to 22.