WO2021057438A1 - 主备切换方法、装置、bras设备及存储介质 - Google Patents
主备切换方法、装置、bras设备及存储介质 Download PDFInfo
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- WO2021057438A1 WO2021057438A1 PCT/CN2020/113393 CN2020113393W WO2021057438A1 WO 2021057438 A1 WO2021057438 A1 WO 2021057438A1 CN 2020113393 W CN2020113393 W CN 2020113393W WO 2021057438 A1 WO2021057438 A1 WO 2021057438A1
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- control plane
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/287—Remote access server, e.g. BRAS
Definitions
- This application relates to the field of communications, for example, to a method, device, BRAS device, and storage medium for switching between active and standby.
- Virtual Broadband Remote Access Server (Virtual Broadband Remote Access Server, vBRAS) is a virtualization of Broadband Remote Access Server (BRAS). It is located at the network service point of the operator’s metropolitan area network and serves as a user Realize the entrance of multiple businesses.
- the vBRAS transfer and control separation system includes a control plane (Control Plane, CP), a forwarding plane (User Plane, UP, also known as a user plane), and a standardized interface between the control plane and the forwarding plane (CP/UP, C/U) , In order to realize the separation of forwarding and control, the virtualization and centralization of the control plane, and the coexistence of virtual and real forwarding planes.
- control plane of vBRAS if the control plane corresponding to a single data center fails, the user data of the control plane stored in the data center will be lost, thereby affecting the disaster recovery performance and safety of the vBRAS transfer control separation system Sex.
- the present application provides an active/standby switching method, device, BRAS equipment, and storage medium, which ensure that no user data is lost through active/standby switching, thereby improving the disaster tolerance performance and security of the vBRAS system.
- an active/standby switching method including:
- the instance in the second control plane is switched from the standby state to the recovering state, where the recovering state is used by the second control plane to extract user data in the first control plane from the database,
- the instance in the first control plane is the main state, the first control plane and the second control plane are respectively connected to a database, and the database is used to store user data in the first control plane and the second control plane;
- the instance in the second control plane is switched from the restoring state to the main state.
- a main-standby switching device including:
- the first state switching module is configured to switch the instance in the second control plane from the standby state to the restoring state when the first control plane is abnormal, wherein the restoring state is used for the second control plane to switch from the standby state to the restoring state.
- the user data in the first control plane is extracted from the database, the instance in the first control plane is the main state, the first control plane and the second control plane are respectively connected to the database, and the database uses To save user data in the first control plane and the second control plane;
- the second state switching module is configured to switch the instance in the second control plane from the restoring state to the main state when it is determined that the second control plane has completed the extraction of user data in the first control plane .
- BRAS device in a scenario where the control plane and the forwarding plane are separated, including:
- One or more processors are One or more processors;
- Storage device set to store one or more programs
- the one or more processors When the one or more programs are executed by the one or more processors, the one or more processors implement the active/standby switching method as described in the embodiment of the present application.
- a storage medium is also provided, on which a computer program is stored, and when the program is executed by a processor, the main-standby switching method described in the embodiment of the present application is implemented.
- FIG. 1 is a schematic diagram of an application scenario of an active/standby switching method provided in Embodiment 1 of the present application;
- FIG. 2 is a schematic flowchart of a main-standby switching method provided in Embodiment 1 of the present application;
- FIG. 3 is a schematic diagram of a user data restoration process in an implementation provided by Embodiment 1 of the present application;
- FIG. 4 is a schematic diagram of a user data recovery process in another implementation provided by Embodiment 1 of the present application.
- FIG. 5 is a schematic diagram of a state transition of an example on a control plane provided by Embodiment 1 of the present application;
- FIG. 6 is a schematic flowchart of a main-standby switching method provided in Embodiment 2 of the present application.
- FIG. 7 is a schematic structural diagram of an active/standby switching device provided in Embodiment 3 of the present application.
- FIG. 8 is a schematic structural diagram of a device provided in Embodiment 4 of the present application.
- FIG. 1 is a schematic diagram of an application scenario of an active/standby switching method provided in Embodiment 1 of the present application, and shows a network diagram of a vBRAS system in a disaster recovery scenario.
- Fig. 2 is a schematic flowchart of a main-standby switching method provided in Embodiment 1 of the present application. This method can be applied to the situation where the user of the control plane in the vBRAS system does not perceive the upgrade. The method can be executed by the main-standby switching device provided by the present application, which is implemented by software and/or hardware and integrated on one device.
- an active/standby switching method provided by an embodiment of the present application includes step 101 and step 102.
- Step 101 When the first control plane is abnormal, the instance in the second control plane is switched from the standby state to the restoring state, and the restoring state is used by the second control plane to extract user data in the first control plane from the database.
- the instance in the first control plane is the main state, and the first control plane and the second control plane are respectively connected to a database, and the database is used to store user data in the first control plane and the second control plane.
- FIG. 3 is a schematic diagram of a user data recovery process in an implementation provided by Embodiment 1 of the present application.
- control plane A is used as the first control plane
- control plane B is used as the second control plane
- the first Both the first control plane and the second control plane contain only one identical instance.
- instance 1 (instance1) Take instance 1 (instance1) as an instance.
- the instance in the first control plane is the main state
- the second control plane The instance in is in the standby state
- the first control plane and the second control plane are respectively connected to the forwarding plane 1, the forwarding plane 2, the forwarding plane 3, and the forwarding plane 4.
- the forwarding plane always sends users to the control plane of the master state of the instance Data, so when the first control plane is normal, the first control plane takes over the above four control planes.
- the physical network is connected to the four forwarding planes.
- the user’s online message will be delivered to the first control plane.
- the first control plane will send the user information Save to the database.
- the abnormality includes: occurrence of downtime, power outage, or network interface link failure.
- the instance in the second control plane is switched from the standby state to the recovering state, and the recovering state is used by the second control plane to extract the data in the first control plane from the database.
- User data is used by the second control plane to extract the data in the first control plane from the database.
- the method further includes: when it is determined that the communication connection between the first control plane and the second control plane is normal, the second control plane A control plane sends a state transition message, where the state transition message is used to instruct the instance in the first control plane to switch from the main state to the standby state.
- the method further includes: the second control plane sends a switching instruction to the forwarding plane pointing to the first control plane, and the switching instruction is used to instruct the forwarding plane to point to The second control surface.
- the forwarding plane points to the second control plane, including: the encapsulation and decapsulation table of the forwarding plane points to the second control plane, or the channel link of the forwarding plane points to the second control plane.
- the network service header (NSH) encapsulation and decapsulation table of forwarding plane 1, forwarding plane 2, forwarding plane 3, and forwarding plane 4 points to the second control plane, or forwarding plane 1, forwarding plane 2, and forwarding plane 3 and forwarding plane 4 respectively select the main open flow (OpenFlow) channel as the OpenFlow channel linked to the second control plane.
- NSH network service header
- the number of instances is at least two, and the state switching of the at least two instances in the first control plane is independent of each other, and the state switching of the at least two instances in the second control plane is independent of each other.
- FIG. 4 is a schematic diagram of a user data recovery process in another implementation provided by Embodiment 1 of the present application.
- the two control planes in this implementation respectively include multiple instances.
- two Take an example for description and the two instances are each active and standby respectively.
- Use control plane A as the first control plane
- control plane B as the second control plane
- instance1 as the first instance
- instance2 as the second instance.
- the first control plane is normal, the first control plane
- the first instance in the master state, the second instance in the first control plane is the standby state; the first instance in the second control plane is the standby state, and the second instance in the second control plane is the master status.
- the first control plane When the first control plane is normal, the first control plane takes over the forwarding plane 1 and the forwarding plane 2, and the second control plane takes over the forwarding plane 3 and the forwarding plane 4.
- the physical network When a user dials up and goes online, the physical network is connected to forwarding plane 1 and forwarding plane 2, and the user’s online message will be delivered to the first control plane.
- the physical network is connected to forwarding plane 3 and forwarding plane 4.
- the online message will be delivered to the second control plane.
- forwarding plane 1 and forwarding plane 2 There are users on forwarding plane 1 and forwarding plane 2 on the first control plane, and they belong to the first instance.
- forwarding plane 3 and forwarding plane 4 On the second control plane, there are users on forwarding plane 3 and forwarding plane 4, and they belong to the second instance.
- the control plane and the second control plane are the masters of each other.
- the second control plane When the first control plane is abnormal, the second control plane needs to take over the forwarding plane 1 and the forwarding plane 2 without affecting online users. Therefore, the first instance in the second control plane is upgraded from the standby state to the primary state. Before the first instance in the second control plane is promoted from the standby state to the main state, the first instance in the second control plane will first be switched from the main state to the recovering state.
- the method further includes: in the case where it is determined that the communication connection between the first control plane and the second control plane is normal, the second control plane The first control plane sends a state transition message, where the state transition message is used to indicate that the first instance in the first control plane is switched from the main state to the standby state.
- the method further includes: the second control plane sends a switching instruction to the forwarding plane pointing to the first control plane, and the switching instruction is used for Instruct the forwarding plane 1 and the forwarding plane 2 to point to the second control plane.
- the forwarding plane 1 and the forwarding plane 2 point the NSH encapsulation and decapsulation table to the second control plane, or the forwarding plane 1 and the forwarding plane 2 respectively select the main OpenFlow channel as the OpenFlow channel linked to the second control plane.
- data such as user tables and network segment routes on forwarding plane 1 and forwarding plane 2 will start to age, and wait for the second control plane to re-issue service data.
- the second control plane will pull the users in the forwarding plane 1 and the forwarding plane 2 that are already online from the database, and restore them to the second control plane.
- the second control plane acquires a user, it synchronizes the user to the forwarding plane 1 or the forwarding plane 2, and the forwarding plane 1 and the forwarding plane 2 stop the aging of the user after receiving the user synchronization information.
- the second control plane When the first instance in the second control plane is in the recovering state, the second control plane will control the forwarding plane 1 and forwarding plane 2’s new users not to go online, so as to avoid resources occupied by new online users and recovery from the database. User conflicts under the first instance of. And when the instance in the second control plane is in the recovering state, the user tables on the forwarding plane 1 and the forwarding plane 2 still exist, and the user's upstream and downstream traffic are normal, thereby not affecting the user's online experience.
- the second instance on the first control plane When the first instance on the second control plane is in the recovering state, if the second instance on the first control plane obtains the master upgrade command, the second instance on the first control plane will switch from the standby state to the recovering state In the middle state, and the corresponding second instance on the second control plane will become the standby state, because the state switching of the first instance and the second instance in the first control plane in the implementation of this application are independent of each other, so In the embodiments of the present application, it is possible to implement operations in which the second instance in the first control plane and the first instance in the second control plane are promoted to the master state at the same time.
- Step 102 When it is determined that the second control plane has completed the extraction of user data in the first control plane, the instance in the second control plane is switched from the restoring state to the main state.
- Figure 5 is a schematic diagram of an example state transition on the control plane provided by the first embodiment. As shown in Figure 5, by using the main state, the standby state and the restoring state, the user data is realized on the control plane A and the control plane B. The function of hot backup between.
- control plane A can be used as the first control plane and the control plane B can be used as the second control plane, or the control plane A can be used as the second control plane and the control plane B can be used as the first control plane. Therefore, in the embodiment of the present application, whether the control plane A is abnormal or the control plane B is abnormal, the switch between the active and standby states of the instance can be realized. However, in the embodiments of the present application, only the control plane A is used as the first control plane for exemplary description.
- the configuration of one instance on the control plane is supported, but also the configuration of multiple instances on the control plane is supported.
- the state switching of each instance is independent of each other and does not affect each other.
- the state of the instances in the first control plane and the second control plane can be the master of each other, and each instance supports different forwarding. Therefore, all users can share on the first control plane and the second control plane, so as to realize the load balancing function of the control plane.
- the present application provides a main-standby switching method
- FIG. 6 is a schematic flowchart of a main-standby switching method provided by the present application. This method can be applied to the situation where the user of the control plane in the vBRAS system does not perceive the upgrade.
- the method can be executed by the main-standby switching device provided by the present application, which is implemented by software and/or hardware and integrated on one device.
- the main-standby switching method provided by the embodiment of the present application includes step 201 to step 203.
- Step 201 When the first control plane is abnormal, the instance in the second control plane is switched from the standby state to the restoring state, and the restoring state is used by the second control plane to extract user data in the first control plane from the database.
- the instance in the first control plane is the main state, and the first control plane and the second control plane are respectively connected to a database, and the database is used to store user data in the first control plane and the second control plane.
- Step 202 When it is determined that the second control plane has completed the extraction of user data in the first control plane, the instance in the second control plane is switched from the restoring state to the main state.
- Step 203 When it is determined that the instance in the first control plane still maintains the main state, the instance state is adjusted through negotiation between the first control plane and the second control plane.
- the instance state adjustment is performed through the negotiation between the first control plane and the second control plane, including: if it is determined that the second control plane receives the state information of the first control plane first, the second control plane performs the state adjustment according to the first control plane.
- the state information of a control plane determines that the instance in the second control plane is switched to the main state, and the second control plane sends an instruction to the first control plane.
- the instruction is used to instruct the instance in the first control plane to switch from the main state to the standby state.
- the first control plane determines that the instance in the second control plane is the state of the second control plane and then switches to the master state according to the state information of the second control plane.
- the control plane automatically switches the contained instances from the main state to the standby state.
- the second control plane After the instance in the second control plane is switched from the standby state to the recovering state, when it is determined that the communication connection between the first control plane and the second control plane is normal, the second control plane sends a state transition message to the first control plane, Among them, the state transition message is used to indicate that the instance in the first control plane is switched from the main state to the standby state.
- the first control plane cannot receive the state transition message of the second control plane. Therefore, after the instance in the second control plane switches to the master state, the first control plane Both the instance of and the instance in the second control plane will be in the main state, thus the phenomenon of dual-master will appear. Therefore, when the network of the first control plane returns to normal, the first control plane and the second control plane will adjust the instance status through negotiation.
- the instance of the first control plane is upgraded to the main state at T1, and then the network of the first control plane fails, and the instance of the second control plane is upgraded at T2.
- the network link between the first control plane and the second control plane is restored at time T3, in the time sequence T3>T2>T1.
- the first control plane sends state information to the second control plane first, so the second control plane first receives the state information from the first control plane: the main state duration of the instance is (T3-T1) , After the second control plane receives the state information sent by the first control plane, it will calculate the main state duration of its own instance as (T3-T2), because (T3-T1)>(T3-T2), the second The control plane can determine that its instance is switched to the master state afterwards, so it will maintain its state, and at the same time send an instruction to the first control plane. The instruction is used to instruct the instance in the first control plane to switch from the master state to the standby state.
- the second control plane sends state information to the first control plane first, so the first control plane first receives the state information from the second control plane: the main state duration of the instance is (T3-T2) , After the first control plane receives the state information sent by the second control plane, it will calculate the main state duration of its own instance as (T3-T1), because (T3-T1)>(T3-T2), so the first A control plane can determine that its own instance is first switched to the primary state, the current instance’s state is wrong and should be switched to the standby state, and the state of the second control plane instance is correct, so the first control plane will contain itself The state of the instance is switched from the main state to the standby state, so as to achieve the consistency of the state.
- FIG. 7 is a schematic structural diagram of an active/standby switching device provided in the third embodiment of the application. As shown in FIG. 7, the device includes: a first state switching module 31 configured as When the first control plane is abnormal, the instance in the second control plane is switched from the standby state to the restoring state.
- the restoring state is used by the second control plane to extract user data in the first control plane from the database, and the first control plane
- the instance in the main state, the first control plane and the second control plane are respectively connected to the database, the database is used to save the user data in the first control plane and the second control plane; the second state switching module 32 is set to determine the first When the second control plane completes the extraction of user data in the first control plane, the instance in the second control plane is switched from the restoring state to the main state.
- the active/standby switching device provided in this embodiment is configured to implement the active/standby switching method of this application.
- the implementation principle and effect of the active/standby switching device provided in this embodiment are similar to the active/standby switching method of this application, and will not be repeated here.
- it further includes: a first sending module, configured to send a state transition message to the first control plane when it is determined that the communication connection between the first control plane and the second control plane is normal, wherein the state The transition message is used to indicate that the instance in the first control plane is switched from the main state to the standby state.
- a first sending module configured to send a state transition message to the first control plane when it is determined that the communication connection between the first control plane and the second control plane is normal, wherein the state The transition message is used to indicate that the instance in the first control plane is switched from the main state to the standby state.
- it further includes: a second sending module, configured to send a switching instruction to the forwarding plane that points to the first control plane by the second control plane, where the switching instruction is used to instruct the forwarding plane to point to the second control plane.
- a second sending module configured to send a switching instruction to the forwarding plane that points to the first control plane by the second control plane, where the switching instruction is used to instruct the forwarding plane to point to the second control plane.
- the forwarding plane points to the second control plane, including:
- the encapsulation and decapsulation table of the forwarding plane points to the second control plane, or,
- the channel link of the forwarding plane points to the second control plane.
- it further includes: a state adjustment module configured to adjust the instance state through negotiation between the first control plane and the second control plane when it is determined that the instance in the first control plane still maintains the main state.
- the state adjustment module is configured to: if it is determined that the second control plane receives the state information of the first control plane first, the second control plane determines the state information of the second control plane according to the state information of the first control plane. If the instance is switched to the main state later, the second control plane sends an instruction to the first control plane. The instruction is used to instruct the instance in the first control plane to switch from the main state to the standby state; if it is determined that the first control plane receives the second state first The state information of the control plane. The first control plane determines that the instance in the second control plane is switched to the master state according to the state information of the second control plane, and the first control plane automatically switches the contained instances from the master state to the master state. ⁇ status.
- the number of instances is at least two, and the state switching of the at least two instances in the first control plane is independent of each other, and the state switching of the at least two instances in the second control plane is independent of each other.
- the abnormality includes: occurrence of downtime, power outage, or network interface link failure.
- FIG. 8 is a schematic structural diagram of a device provided in Embodiment 4 of this application.
- the device provided by this application includes :One or more processors 41 and storage device 42; the processor 41 of the device can be one or more, and one processor 41 is taken as an example in FIG. 8; the storage device 42 is configured to store one or more programs; one The or more programs are executed by one or more processors 41, so that the one or more processors 41 implement the active/standby switching method as in the embodiment of the present application.
- the processor 41 and the storage device 42 in the device may be connected by a bus or in other ways.
- the connection by a bus is taken as an example.
- the storage device 42 can be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the main-standby switching method in the embodiment of the present application (for example, in the main-standby switching device)
- the storage device 42 may include a storage program area and a storage data area.
- the storage program area may store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the device, and the like.
- the storage device 42 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.
- the storage device 42 may include a memory remotely provided with respect to the processor 41, and these remote memories may be connected to the device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.
- the embodiment of the present application also provides a storage medium on which a computer program is stored, and when the program is executed by a processor, the active/standby switching method in any of the embodiments of the present application is implemented.
- the main-standby switch method includes: when the first control plane is abnormal, the instance in the second control plane is switched from the standby state to the recovering state, and the recovering state is used by the second control plane to extract the data in the first control plane from the database.
- User data the instance in the first control plane is the main state, the first control plane and the second control plane are respectively connected to the database, the database is used to save the user data in the first control plane and the second control plane;
- the instance in the second control plane is switched from the restoring state to the main state.
- the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof.
- some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device, although the present application is not limited thereto.
- Computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or written in any combination of one or more programming languages Source code or object code.
- ISA Instruction Set Architecture
- the block diagram of any logic flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions.
- the computer program can be stored on the memory.
- the memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as but not limited to read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), optical Memory devices and systems (Digital Video Disc (DVD) or Compact Disk (CD)), etc.
- Computer-readable media may include non-transitory storage media.
- the data processor can be any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processing, DSP), application specific integrated circuits (ASICs) ), programmable logic devices (Field-Programmable Gate Array, FPGA), and processors based on multi-core processor architecture.
- DSP Digital Signal Processing
- ASICs application specific integrated circuits
- FPGA Field-Programmable Gate Array
- FPGA Field-Programmable Gate Array
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Abstract
本文公开了一种主备切换方法、装置、BRAS设备及存储介质。该主备切换方法包括：在第一控制面异常的情况下，第二控制面中的实例由备状态切换为恢复中状态，其中，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据，第一控制面中的实例为主状态，第一控制面与第二控面分别连接数据库，数据库用于保存第一控制面和第二控制面中的用户数据；在确定第二控制面将第一控制面中的用户数据提取完成的情况下，第二控制面中的实例由恢复中状态切换为主状态。
Description
本申请要求在2019年09月27日提交中国专利局、申请号为201910927945.0的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
本申请涉及通讯领域，例如涉及一种主备切换方法、装置、BRAS设备及存储介质。
虚拟宽带远程接入服务器(Virtual Broadband Remote Access Server，vBRAS)是宽带远程接入服务器(Broadband Remote Access Server，BRAS)的一种虚拟化，其位于运营商的城域网的网络服务网点，是用户实现多种业务的入口。vBRAS的转控分离系统包括控制面(Control Plane，CP)、转发面(User Plane，UP，又称作用户面)以及控制面/转发面(CP/UP，C/U)之间的标准化接口，以实现转发和控制分离、控制面虚拟化集中化以及转发面的虚实共存。
关于vBRAS的控制面，在单个数据中心对应的控制面出现故障的情况下，会造成该数据中心中存储的该控制面的用户数据丢失，从而影响vBRAS的转控分离系统的容灾性能以及安全性。
发明内容
本申请提供一种主备切换方法、装置、BRAS设备及存储介质，通过主备切换确保不造成用户数据的丢失，从而提高vBRAS系统的容灾性能以及安全性。
提供了一种主备切换方法，包括：
在第一控制面异常的情况下，第二控制面中的实例由备状态切换为恢复中状态，其中，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据，第一控制面中的实例为主状态，第一控制面与第二控面分别连接数据库，数据库用于保存第一控制面和第二控制面中的用户数据；
在确定第二控制面将第一控制面中的用户数据提取完成的情况下，第二控制面中的实例由恢复中状态切换为主状态。
还提供了一种主备切换装置，包括：
第一状态切换模块，设置为在第一控制面异常的情况下，第二控制面中的 实例由备状态切换为恢复中状态，其中，所述恢复中状态用于所述第二控制面从数据库中提取所述第一控制面中的用户数据，所述第一控制面中的实例为主状态，所述第一控制面与所述第二控面分别连接所述数据库，所述数据库用于保存所述第一控制面和所述第二控制面中的用户数据；
第二状态切换模块，设置为在确定所述第二控制面将所述第一控制面中的用户数据提取完成的情况下，所述第二控制面中的实例由恢复中状态切换为主状态。
还提供了一种控制面和转发面分离场景下的BRAS设备，包括：
一个或多个处理器；
存储装置，设置为存储一个或多个程序；
当所述一个或多个程序被所述一个或多个处理器执行，使得所述一个或多个处理器实现如本申请实施例所述的主备切换方法。
还提供了一种存储介质，其上存储有计算机程序，该程序被处理器执行时实现本申请实施例所述的主备切换方法。
图1是本申请实施例一提供的一种主备切换方法的应用场景示意图；
图2是本申请实施例一提供的一种主备切换方法的流程示意图；
图3是本申请实施例一提供的一种实现中的用户数据恢复过程示意图；
图4是本申请实施例一提供的另一种实现中的用户数据恢复过程示意图；
图5是本申请实施例一提供的一种控制面上实例状态转换示意图；
图6是本申请实施例二提供的一种主备切换方法的流程示意图；
图7是本申请实施例三提供的一种主备切换装置的结构示意图；
图8是本申请实施例四提供的一种设备的结构示意图。
下文中将结合附图对本申请的实施例进行说明。
实施例一
在一个示例性实施方式中，本申请提供了一种主备切换方法。图1是本申请实施例一提供的一种主备切换方法的应用场景示意图，表示vBRAS系统在容灾场景下的组网图。图2是本申请实施例一提供的一种主备切换方法的流程示 意图。该方法可以适用于vBRAS系统中的控制面的用户无感知升级的情况。该方法可以由本申请提供的主备切换装置执行，该主备切换装置由软件和/或硬件实现，并集成在一个设备上。
如图1所示，本申请实施方式提供的一种主备切换方法，包括步骤101和步骤102。
步骤101，在第一控制面异常时，第二控制面中的实例由备状态切换为恢复中状态，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据。
第一控制面中的实例为主状态，第一控制面与第二控制面分别连接数据库，数据库用于保存第一控制面和第二控制面中的用户数据。
图3是本申请实施例一提供的一种实现中的用户数据恢复过程的示意图，如图3所示，将控制面A作为第一控制面，将控制面B作为第二控制面，并且第一控制面和第二控制面都只包含一个相同的实例，将实例1(instance1)作为实例，在第一控制面正常的情况下，第一控制面中的实例为主状态，第二控制面中的实例为备状态，并且第一控制面和第二控制面分别连接转发面1、转发面2、转发面3和转发面4，由于转发面总是向实例为主状态的控制面发送用户数据，所以第一控制面正常的情况下，是由第一控制面来接管上述的四个控制面。在用户拨号上线时，物理网络与上述四个转发面相连的用户，该用户的上线报文将投递到第一控制面，而第一控制面在处理完用户的上线报文后，将用户信息保存到数据库中。
在一个示例中，异常包括：发生宕机、断电或网络接口链路故障。当第一控制面出现上述任意一种异常状态时，则第二控制面中的实例由备状态切换为恢复中状态，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据。
在一个示例中，在第二控制面中的实例由备状态切换为恢复中状态之后，还包括：在确定第一控制面与第二控制面的通信连接正常的情况下，第二控制面向第一控制面发送状态转换消息，其中，状态转换消息用于指示第一控制面中的实例由主状态切换为备状态。
在一个示例中，在第二控制面中的实例由备状态切换为恢复中状态之后，还包括：第二控制面向指向第一控制面的转发面发送切换指令，切换指令用于指示转发面指向第二控制面。
在一个示例中，转发面指向第二控制面，包括：转发面的封装解封装表指向第二控制面，或，转发面的通道链接指向第二控制面。
例如，转发面1、转发面2、转发面3和转发面4的网络服务报头(Network Service Header，NSH)封装解封装表指向第二控制面，或，转发面1、转发面2、转发面3和转发面4分别把主开流(OpenFlow)通道选成与第二控制面链接的OpenFlow通道。
在一个示例中，实例的数量至少为两个，并且至少两个实例在第一控制面中的状态切换互相独立，至少两个实例在第二控制面中的状态切换互相独立。
图4是本申请实施例一提供的另一种实现中的用户数据恢复过程的示意图，如图4所示，该实现中两个控制面上分别包括多个实例，本实施方式中以两个为例进行说明，并且两个实例分别互为主备。将控制面A作为第一控制面，将控制面B作为第二控制面，将instance1作为第一个实例，将instance2作为第二个实例，在第一控制面正常的情况下，第一控制面中的第一个实例为主状态，第一控制面中的第二个实例为备状态；第二控制面中的第一个实例为备状态，第二控制面中的第二个实例为主状态。在第一控制面正常的情况下，是由第一控制面接管转发面1和转发面2，由第二控制面接管转发面3和转发面4。在用户拨号上线时，物理网络与转发面1和转发面2相连的用户，该用户的上线报文将投递到第一控制面，物理网络与转发面3和转发面4相连的用户，该用户的上线报文将投递到第二控制面，第一控制面和第二控制面分别处理完用户的上线报文后，会将各自的用户信息分别保存在数据库中。
第一控制面上有转发面1和转发面2的用户，并且归属于第一个实例，第二控制面上有转发面3和转发面4的用户，并且归属于第二个实例，第一控制面和第二控制面互为主备，数据库里有转发面1、转发面2、转发面3和转发面4的全部用户，所有的用户负载分担在第一控制面和第二控制面上。
当第一控制面异常时，需要由第二控制面接管转发面1和转发面2，并且不影响在线用户，因此第二控制面中的第一个实例由备状态升为主状态。而在第二控制面中的第一个实例由备状态升为主状态之前，第二控制面中的第一个实例会首先由主状态切换为恢复中状态。
在一个示例中，在将第二控制面中的实例由备状态切换为恢复中状态之后，还包括：在确定第一控制面与第二控制面的通信连接正常的情况下，第二控制面向第一控制面发送状态转换消息，其中，状态转换消息用于指示第一控制面中的第一个实例由主状态切换为备状态。
在一个示例中，在将第二控制面中的第一个实例由备状态切换为恢复中状态之后，还包括：第二控制面向指向第一控制面的转发面发送切换指令，切换指令用于指示转发面1和转发面2指向第二控制面。
转发面1和转发面2将NSH封装解封装表指向第二控制面，或，转发面1 和转发面2分别把主OpenFlow通道选成与第二控制面链接的OpenFlow通道。
在本实施方式中，转发面1和转发面2上的用户表、网段路由等数据会启动老化，等待第二控制面重新下发业务数据。并且在第二控制面中的第一个实例处于恢复中状态时，第二控制面会去数据库中拉取已经在线的转发面1和转发面2中的用户，并恢复到第二控制面上。第二控制面每获取一个用户，就把这个用户往转发面1或转发面2同步，转发面1和转发面2收到用户同步信息后停止该用户的老化。
在第二控制面中的第一个实例处于恢复中状态时，第二控制面会控制转发面1和转发面2的新用户不可以上线，从而避免新上线的用户占用的资源与从数据库中恢复的第一个实例下的用户冲突。并且当第二控制面中的实例在恢复中状态时，转发面1和转发面2上的用户表依然存在，用户上行流量和下行流量正常，从而不影响用户的上网体验。
第二控制面中的第一个实例在恢复中状态时，如果第一控制面中的第二个实例获取到升主指令，则第一控制面上的第二个实例由备状态切换为恢复中状态，并且相应的第二控制面上的第二个实例将变成备状态，因为本申请实施方式中第一个实例与第二个实例在第一控制面中的状态切换互相独立，因此本申请实施方式中可以实现第一控制面中的第二个实例与第二控制面中的第一个实例同时升为主状态的操作。
步骤102，在确定第二控制面将第一控制面中的用户数据提取完成的情况下，第二控制面中的实例由恢复中状态切换为主状态。
图5是本实施例一提供的一种控制面上的实例状态转换示意图，如图5所示，通过利用主状态、备状态和恢复中状态，实现了用户数据在控制面A和控制面B之间热备份的功能。
针对图3或图4，既可以将控制面A作为第一控制面，控制面B作为第二控制面，也可以将控制A作为第二控制面，控制面B作为第一控制面。因此本申请实施方式中不论是控制面A发生异常，还是控制面B发生异常，都可以实现实例主备状态的切换。而本申请实施方式中仅是以控制面A作为第一控制面进行的示例性说明。
本申请实施方式中，不仅支持控制面上配置一个实例，也支持控制面上配置多个实例。并且在配置多个实例的情况下，每个实例的状态切换互相独立，互不影响，第一控制面和第二控制面中的实例状态可以互为主备，并且每个实例分别支持不同转发面的运行，因此所有的用户可以分担在第一控制面和第二控制面上，从而实现控制面的负载均衡功能。
实施例二
在一个示例性实施方式中，本申请提供了一种主备切换方法，图6是本申请提供的一种主备切换方法的流程示意图。该方法可以适用于vBRAS系统中的控制面的用户无感知升级的情况。该方法可以由本申请提供的主备切换装置执行，该主备切换装置由软件和/或硬件实现，并集成在一个设备上。
如图6所示，本申请实施方式提供的一种主备切换方法，包括步骤201至步骤203。
步骤201，在第一控制面异常时，第二控制面中的实例由备状态切换为恢复中状态，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据。
第一控制面中的实例为主状态，第一控制面与第二控制面分别连接数据库，数据库用于保存第一控制面和第二控制面中的用户数据。
步骤202，在确定第二控制面将第一控制面中的用户数据提取完成的情况下，第二控制面中的实例由恢复中状态切换为主状态。
步骤203，在确定第一控制面中的实例依然保持主状态的情况下，通过第一控制面和第二控制面之间的协商进行实例状态调整。
在一个实例中，通过第一控制面和第二控制面之间的协商进行实例状态调整，包括：若确定第二控制面先收到第一控制面的状态信息，通过第二控制面根据第一控制面的状态信息确定第二控制面中的实例是后切换为主状态，则第二控制面向第一控制面发送指令，指令用于指示第一控制面中的实例由主状态切换为备状态；若确定第一控制面先收到第二控制面的状态信息，通过第一控制面根据第二控制面的状态信息确定第二控制面中的实例是后切换为主状态，则第一控制面自动将所包含的实例由主状态切换为备状态。
在第二控制面中的实例由备状态切换为恢复中状态之后，在确定第一控制面与第二控制面的通信连接正常的情况下，第二控制面向第一控制面发送状态转换消息，其中，状态转换消息用于指示第一控制面中的实例由主状态切换为备状态。但是当第一控制面发生网络故障的情况下，第一控制面是无法收到第二控制面的状态转换消息，因此在第二控制面中的实例切换为主状态之后，第一控制面中的实例和第二控制面中的实例都会是主状态，从而出现双主的现象。因此当第一控制面网络恢复正常后，第一控制面和第二控制面会通过协商进行实例状态调整。
以第一控制面和第二控制面分别包括一个实例进行举例说明，T1时刻第一控制面的实例升为主状态，之后第一控制面网络发生故障，T2时刻控制第二控 制面的实例升级为主状态，在T3时刻恢复第一控制面和第二控制面之间的网络链路，在时间顺序上T3>T2>T1。
第一种情况下：第一控制面先向第二控制面发送状态信息，因此第二控制面先收到第一控制面中的状态信息为：实例的主状态持续时间为(T3-T1)，第二控制面收到第一控制面所发送的状态信息后，会计算自身的实例的主状态持续时间为(T3-T2)，由于(T3-T1)>(T3-T2)，第二控制面可以确定自身的实例是后切换为主状态的，因此会保持自己的状态，同时向第一控制面发送指令，指令用于指示第一控制面中的实例由主状态切换为备状态。
第二种情况下：第二控制面先向第一控制面发送状态信息，因此第一控制面先收到第二控制面中的状态信息为：实例的主状态持续时间为(T3-T2)，第一控制面收到第二控制面所发送的状态信息后，会计算自身的实例的主状态持续时间为(T3-T1)，由于(T3-T1)>(T3-T2)，因此第一控制面可以确定自身的实例是先切换为主状态的，当前实例的状态是错误的应该切换为备状态，而第二控制面实例的状态是正确的，因此第一控制面会将自身所包含的实例的状态由主状态切换为备状态，从而实现状态的一致。
实施例三
本申请提供了一种主备切换装置，图7为本申请实施例三提供的一种主备切换装置的结构示意图，如图7所示，该装置包括：第一状态切换模块31，设置为在第一控制面异常时，第二控制面中的实例由备状态切换为恢复中状态，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据，第一控制面中的实例为主状态，第一控制面与第二控面分别连接数据库，数据库用于保存第一控制面和第二控制面中的用户数据；第二状态切换模块32，设置为在确定第二控制面将第一控制面中的用户数据提取完成的情况下，第二控制面中的实例由恢复中状态切换为主状态。
本实施例提供的主备切换装置设置为实现本申请的主备切换方法，本实施例提供的主备切换装置实现原理和效果与本申请的主备切换方法类似，此处不再赘述。
在一个示例中，还包括：第一发送模块，设置为在确定第一控制面与第二控制面的通信连接正常的情况下，第二控制面向第一控制面发送状态转换消息，其中，状态转换消息用于指示第一控制面中的实例由主状态切换为备状态。
在一个示例中，还包括：第二发送模块，设置为第二控制面向指向第一控制面的转发面发送切换指令，切换指令用于指示转发面指向第二控制面。
在一个示例中，转发面指向第二控制面，包括：
转发面的封装解封装表指向第二控制面，或，
转发面的通道链接指向第二控制面。
在一个示例中，还包括：状态调整模块，设置为在确定第一控制面中的实例依然保持主状态的情况下，通过第一控制面和第二控制面之间的协商进行实例状态调整。
在一个示例中，状态调整模块，是设置为：若确定第二控制面先收到第一控制面的状态信息，通过第二控制面根据第一控制面的状态信息确定第二控制面中的实例是后切换为主状态，则第二控制面向第一控制面发送指令，指令用于指示第一控制面中的实例由主状态切换为备状态；若确定第一控制面先收到第二控制面的状态信息，通过第一控制面根据第二控制面的状态信息确定第二控制面中的实例是后切换为主状态，则第一控制面自动将所包含的实例由主状态切换为备状态。
在一个示例中，实例的数量至少为两个，并且至少两个实例在第一控制面中的状态切换互相独立，至少两个实例在第二控制面中的状态切换互相独立。
在一个示例中，异常包括：发生宕机、断电或网络接口链路故障。
实施例四
本申请实施例提供了一种控制面和转发面分离场景下的BRAS设备，图8为本申请实施例四提供的一种设备的结构示意图，如图8所示，本申请提供的设备，包括：一个或多个处理器41和存储装置42；该设备的处理器41可以是一个或多个，图8中以一个处理器41为例；存储装置42设置为存储一个或多个程序；一个或多个程序被一个或多个处理器41执行，使得一个或多个处理器41实现如本申请实施例中的主备切换方法。
设备中的处理器41、存储装置42可以通过总线或其他方式连接，图8中以通过总线连接为例。
存储装置42作为一种计算机可读存储介质，可设置为存储软件程序、计算机可执行程序以及模块，如本申请实施例主备切换方法对应的程序指令/模块(例如，主备切换装置中的第一状态切换模块31和第二状态切换模块32)。存储装置42可包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序；存储数据区可存储根据设备的使用所创建的数据等。此外，存储装置42可以包括高速随机存取存储器，还可以包括非易失性存 储器，例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中，存储装置42可包括相对于处理器41远程设置的存储器，这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
实施例五
本申请实施例还提供了一种存储介质，其上存储有计算机程序，程序被处理器执行时实现本申请实施例中任一的主备切换方法。
主备切换器方法包括：在第一控制面异常时，第二控制面中的实例由备状态切换为恢复中状态，恢复中状态用于第二控制面从数据库中提取第一控制面中的用户数据，第一控制面中的实例为主状态，第一控制面与第二控面分别连接数据库，数据库用于保存第一控制面和第二控制面中的用户数据；在确定第二控制面将第一控制面中的用户数据提取完成的情况下，第二控制面中的实例由恢复中状态切换为主状态。
以上所述，仅为本申请的示例性实施例而已，并非用于限定本申请的保护范围。
一般来说，本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如，一些方面可以被实现在硬件中，而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中，尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现，例如在处理器实体中，或者通过硬件，或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture，ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序步骤，或者可以表示相互连接的逻辑电路、模块和功能，或者可以表示程序步骤与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现，例如但不限于只读存储器(Read-Only Memory，ROM)、随机访问存储器(Random Access Memory，RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc，DVD)或光盘(Compact Disk，CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型，例如但不限于 通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、可编程逻辑器件(Field-Programmable Gate Array，FPGA)以及基于多核处理器架构的处理器。
Claims (11)
- 一种主备切换方法，包括：在第一控制面异常的情况下，第二控制面中的实例由备状态切换为恢复中状态，其中，所述恢复中状态用于所述第二控制面从数据库中提取所述第一控制面中的用户数据，所述第一控制面中的实例为主状态，所述第一控制面与所述第二控面分别连接所述数据库，所述数据库用于保存所述第一控制面和所述第二控制面中的用户数据；在确定所述第二控制面将所述第一控制面中的用户数据提取完成的情况下，所述第二控制面中的实例由恢复中状态切换为主状态。
- 根据权利要求1所述的方法，在所述第二控制面中的实例由备状态切换为恢复中状态之后，还包括：在确定所述第一控制面与所述第二控制面的通信连接正常的情况下，所述第二控制面向所述第一控制面发送状态转换消息，其中，所述状态转换消息用于指示所述第一控制面中的实例由主状态切换为备状态。
- 根据权利要求2所述的方法，在所述第二控制面中的实例由备状态切换为恢复中状态之后，还包括：所述第二控制面向指向所述第一控制面的转发面发送切换指令，其中，所述切换指令用于指示所述转发面指向所述第二控制面。
- 根据权利要求3所述的方法，其中，所述转发面指向所述第二控制面，包括：所述转发面的封装解封装表指向所述第二控制面，或，所述转发面的通道链接指向所述第二控制面。
- 根据权利要求1所述的方法，在所述第二控制面中的实例由恢复中状态切换为主状态之后，还包括：在确定所述第一控制面中的实例保持主状态的情况下，通过所述第一控制面和所述第二控制面之间的协商进行实例状态调整。
- 根据权利要求5所述的方法，其中，所述通过所述第一控制面和所述第二控制面之间的协商进行实例状态调整，包括：在确定所述第二控制面先收到所述第一控制面的状态信息，通过所述第二控制面根据所述第一控制面的状态信息确定所述第二控制面中的实例是后切换为主状态的情况下，所述第二控制面向所述第一控制面发送指令，所述指令用于指示所述第一控制面中的实例由主状态切换为备状态；在确定所述第一控制面先收到所述第二控制面的状态信息，通过所述第一控制面根据所述第二控制面的状态信息确定所述第二控制面中的实例是后切换为主状态的情况下，所述第一控制面自动将所述第一控制面所包含的实例由主状态切换为备状态。
- 根据权利要求1-6任一项所述的方法，其中，所述异常包括：发生宕机、断电或网络接口链路故障。
- 根据权利要求1所述的方法，其中，所述实例的数量为至少两个，并且至少两个所述实例在所述第一控制面中的状态切换互相独立，至少两个所述实例在所述第二控制面中的状态切换互相独立。
- 一种主备切换装置，包括：第一状态切换模块，设置为在第一控制面异常的情况下，第二控制面中的实例由备状态切换为恢复中状态，其中，所述恢复中状态用于所述第二控制面从数据库中提取所述第一控制面中的用户数据，所述第一控制面中的实例为主状态，所述第一控制面与所述第二控面分别连接所述数据库，所述数据库用于保存所述第一控制面和所述第二控制面中的用户数据；第二状态切换模块，设置为在确定所述第二控制面将所述第一控制面中的用户数据提取完成的情况下，所述第二控制面中的实例由恢复中状态切换为主状态。
- 一种控制面和转发面分离场景下的宽带远程接入服务器BRAS设备，包括：至少一个处理器；存储装置，设置为存储至少一个程序；当所述至少一个程序被所述至少一个处理器执行，使得所述至少一个处理器实现如权利要求1-8中任一项所述的主备切换方法。
- 一种计算机可读存储介质，存储有计算机程序，其中，所述程序被处理器执行时实现如权利要求1-8中任一项所述的主备切换方法。
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