WO2016177231A1 - Dual-control-based active-backup switching method and device - Google Patents

Abstract

Provided are an active-backup switching method and device in a dual control environment. The method comprises: in an active-backup environment, conducting data synchronization for a control plane and a forwarding plane separately, and saving synchronization data of the control plane; conducting active-backup switching by a dual control board; and conducting data recovery by the control plane and the forwarding plane separately, wherein the control plane reestablishes an interface according to the saved synchronization data. By enabling the interface established after the switching to remain consistent with the original, the present invention ensures that newly issued interface data and original routing data can be used directly, thus addressing the problem in the prior art in which an active-backup switching in the dual control environment requires a long period of time of data communication to resume normal communication, thereby reducing data communication recovery time and improving system efficiency.

Description

Active/standby switching method and device based on dual master Technical field

The present invention relates to the field of network management information data communication networks, and in particular to a dual master-based active/standby switching method and apparatus for data communication equipment in a Packet Transport Network (PTN).

Background technique

In the field of data transmission, the Data Communication Network (DCN) provides the transmission channel and communication platform of the system, thereby realizing the informationization and automation of network monitoring, management, maintenance and decision-making. The communication link of the DCN is implemented by various interfaces, including an embedded control channel (ECC), a local area network (LAN) interface, and a wide area network (WAN) interface to support PTN/P. Management communication of the management plane of the OTN device, signaling communication of the control plane, and other communications.

The PTN device currently supports dual-master functions to ensure that the device works normally, and data processing can only be performed on one main control board at a time. When the device starts running, the DCN data communication network sends the physical port and the logical port based on the physical state of the device. The created data is sent to the forwarding plane and the control plane. After receiving the port information, the control plane creates the forwarding domain and routes. Information, and the routing information is sent to the forwarding plane through the interface. When the standby main control board is running normally, the data on the active master is synchronized, so that the data of the forwarding plane and the control plane of the primary and backup masters of the device are consistent and valid.

When the primary host is abnormally switched to the standby master, the DCN data communication network needs to re-deliver the physical port and the logical port based on the physical state of the device. The port creation data is sent to the forwarding plane and the control plane. The processing module finds that the interface data is inconsistent with the original data, and the interface is created. The graceful restart (GR) protocol sends a GR packet to the neighboring neighbors. In this way, the control platform cannot create a new interface. The device retains the original interface data and routing data in the control plane, while the forwarding plane retains the new interface data and the old routing data until the control plane is unlocked before starting to create a new one. The interface starts a new route calculation and finally reports it to the forwarding plane. At this time, the data communication can be restored. Such a process takes a long time to recover the DCN data communication network.

Summary of the invention

The embodiment of the present invention provides an active/standby switching method and device based on dual-master control, so as to solve at least the problem that the DCN data communication network needs to be restored after the active/standby switchover in the related art.

According to an aspect of the embodiments of the present invention, a dual master-based active/standby switching method is provided, where the method includes Next steps:

In the active/standby environment, the control plane and the forwarding plane respectively perform data synchronization, and the synchronization data of the control plane is saved; the dual main control board performs the active/standby switchover; the control plane and the forwarding plane respectively perform data recovery, wherein The control plane recreates the interface according to the synchronization data of the saved disk.

Further, the data synchronization of the control plane includes: backup main control board interface process backup interface data and interface mapping index; routing and forwarding management module backup routing information and address resolution protocol (ARP) information of the control plane The control plane backup data is saved by file or database.

Further, the data synchronization of the forwarding plane includes: the forwarding plane backs up the interface data and an interface mapping index; and the forwarding plane backs up the routing information and ARP information.

Further, the data recovery by the control plane includes: the primary interface module sends the original port deletion and the new port creation; the forwarding plane restores the interface information and the routing data; and the forwarding plane sends the routing data to the driver. , open the data forwarding function of the forwarding plane.

Further, the data recovery by the control plane includes: the primary interface module notifying the control platform interface change; the control plane interface process re-creating the interface according to the saved data, wherein the newly created interface and the interface mapping index and the save disk The data is consistent, so that the routing outbound interface information remains unchanged. Wait for the graceful restart packet GR to re-create the forwarding instance successfully; restore the original data communication route in the new forwarding domain.

According to another aspect of the present invention, a dual-master-based active/standby switching device is provided, including: a synchronization module, configured to perform data synchronization of a control plane and data synchronization of a forwarding plane in an active/standby environment, wherein The synchronization data of the control plane is saved; the switching module is configured as an active/standby switchover of the dual main control board; and the recovery module is configured to recover the data of the control plane and the forwarding plane, so that the control plane is Synchronize the data of the saved disk to recreate the interface.

Further, the synchronization module includes: a control plane interface backup sub-module, which is set as a backup of the interface data of the control plane and an interface mapping index; and a control plane routing backup sub-module, which is set as a backup of the control plane routing information and ARP information. a storage submodule configured to save the backup data of the control plane.

Further, the synchronization module further includes: a forwarding plane interface backup sub-module, configured as a backup of the interface data of the forwarding plane and an interface mapping index; and a forwarding plane routing backup sub-module, which is set to the forwarding plane routing information and ARP information. Backup.

Further, the recovery module includes: an interface sub-module, configured to send the original port deletion and the new port creation notification; the forwarding plane recovery sub-module is set to restore the interface information of the forwarding plane and the routing data; The sub-module is configured to deliver the routing data of the forwarding plane to the driver, and open the data forwarding function of the forwarding plane.

Further, the recovery module further includes: the interface sub-module, further configured to notify the control platform interface of the change; the control plane recovery sub-module, configured to re-create the interface of the control plane according to the saved data, wherein The created interface and the interface mapping index are the same as the data in the save disk, so that the outbound interface information remains unchanged. The submodule is created, and the forwarding instance is successfully created after the Graceful Restart message GR is completed. The route recovery submodule is set to In The original forwarding domain recovers the original data communication route.

In the foregoing embodiment of the present invention, the interface is created and kept consistent with the original when the interface is created after the switching, so that the newly delivered interface data and the original routing data can be directly used, thereby solving the prior art. In the dual-master environment, the active/standby switchover requires long-term data communication to restore normal problems, which reduces the data communication recovery time and provides system efficiency.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a dual master-based active/standby switching method according to an embodiment of the present invention;

2 is a structural block diagram of a dual-master based active/standby switching device according to an embodiment of the present invention;

3 is a structural block diagram of a dual-master based active/standby switching device according to another embodiment of the present invention;

4 is a schematic diagram of backup of primary and backup data according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of recovery of active and standby data according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

The transmission channel and the communication platform of the data communication network system are established, thereby implementing the network monitoring, management, and maintenance functions. This part has been implemented in the DCN. This part of the content is not within the scope of this patent. The embodiment of the present invention continues the functions that the DCN has implemented. In the active/standby environment of the device, DCN fast switching is implemented through data backup and fast recovery.

In order to solve the problem that the control plane is locked and the control plane and forwarding plane data are inconsistent after the master/slave switchover is created, it takes a long time to recover the DCN data communication network. You can ensure that the port is created and maintained when the port is created after the switchover. The original consistency has ensured that the newly delivered port data and the original routing data can be directly used, as follows:

The data backup and switching recovery of the DCN is divided into two planes: the data forwarding plane and the data control plane. The port information and routing information of the data forwarding plane and the data control plane are the same in the active/standby environment. For the control plane, the interface process of the standby control platform needs to back up the port data and the logical interface and the corresponding mapping relationship, and back up all routing related information. Therefore, the route of the active and standby synchronization can be directly used on the standby board. For the forwarding plane, the standby forwarding platform also needs to back up port information and routing information.

The interface processing module actively sends the original port deletion and the creation of a new port. If the original physical interface needs to be maintained with the previous physical interface and logical interface, the interface processing module will automatically send the original port to the backup port. Consistent. The forwarding plane restores interface information and routing data, and clears the data forwarding function of the forwarding plane. The corresponding control plane needs to re-create the interface from the backup and save data to ensure that the master and the backup generate the same index and ensure that the outbound interface information is unchanged. The active and standby routes can be directly used on the standby board. And wait for the GR to re-create the forwarding domain instance. The original routing data is restored in the new forwarding domain, and the data communication network is quickly switched and restored.

In this embodiment, a dual-master-based active/standby switching method is provided. FIG. 1 is a flowchart of dual-master-based active/standby switching according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps. step:

Step S102: In the active/standby environment, the control plane and the forwarding plane separately perform data synchronization, and save the synchronization data of the control plane.

Step S104: The dual main control board performs an active/standby switchover.

Step S106: The control plane and the forwarding plane respectively perform data recovery, wherein the control plane recreates the interface according to the data of the saved disk.

In this embodiment, the interface is created by the data stored in the disk after the switchover, so that the interface is created and the original interface is consistent with the original, so that the newly delivered interface data and the original route data can be directly used, thereby solving the existing In the technology, the active/standby switchover in the dual-master environment requires a long time data communication to restore the normal problem, and the effect of shortening the data communication recovery time and providing system efficiency is achieved.

The step of performing data synchronization on the control plane includes: backup interface data of the standby main control board interface and interface mapping index; routing and forwarding management module of the control plane backing up routing information and ARP information; and performing control plane backup data by file or database Save.

The step of performing data synchronization on the forwarding plane includes: forwarding plane backup interface data and an interface mapping index; forwarding plane backup routing information and ARP information.

The data recovery process of the control plane includes: the primary interface module sends the original port deletion and the new port creation; the forwarding plane restores the interface information and the routing data; the forwarding plane sends the routing data to the driver, and the forwarding plane data is opened. Forwarding function.

The step of performing data recovery by the control plane includes: the primary interface module notifying the control platform interface change; the control plane interface process re-creating the interface according to the saved data, wherein the newly created interface and the interface mapping index are consistent with the data in the save disk, so that The outbound interface information remains unchanged. Wait for the graceful restart packet GR to re-create the forwarding instance successfully; restore the original data communication route in the new forwarding domain.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (eg, ROM/RAM, disk, CD-ROM includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In this embodiment, a dual-master-based active/standby switching device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a dual-master-based active/standby switching device according to an embodiment of the present invention. As shown in FIG. 2, the device includes: a synchronization module 10, configured to synchronize and forward data of a control plane in a primary standby environment. Data synchronization of the plane, wherein the synchronization data of the control plane is saved; the switching module 20 is configured as an active/standby switchover of the dual main control board; and the recovery module 30 is configured to recover the data of the control plane and the forwarding plane. Having the control plane recreate the interface based on the synchronized data of the saved disk.

FIG. 3 is a structural block diagram of a dual-master-based active/standby switching device according to an embodiment of the present invention. As shown in FIG. 3, the device includes the synchronization module 10, the switching module 20, and the recovery module 30 shown in FIG.

The synchronization module 10 includes: a control plane interface backup sub-module 11 configured to be a backup of the interface data of the control plane and an interface mapping index; and a control plane routing backup sub-module 12 configured to be the control plane routing information and ARP information. The backup sub-module 13 is set to save the backup data of the control plane.

The synchronization module 10 further includes: a forwarding plane interface backup sub-module 14, configured as a backup of the interface data of the forwarding plane and an interface mapping index; and a forwarding plane routing backup sub-module 15 configured to be the forwarding plane routing information and ARP Backup of information.

The recovery module 30 includes: an interface sub-module 31, configured to send the original port deletion and the new port creation notification, and the forwarding plane recovery sub-module 32 is configured to restore the interface information and routing data of the forwarding plane; The sending sub-module 33 is configured to deliver the routing data of the forwarding plane to the driver, and open the data forwarding function of the forwarding plane.

The interface sub-module 31 is further configured to notify the control platform interface of the change. The recovery module 30 further includes: a control plane recovery sub-module 34, configured to re-create the interface of the control plane according to the saved data, where The newly created interface and the interface mapping index are the same as the data in the save disk, so that the routing outbound interface information remains unchanged. The sub-module 35 is created, and the forwarding instance is successfully created after the Graceful Restart message GR is completed. The route recovery sub-module 36 , set to restore the original data communication route in the new forwarding domain.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

Embodiments of the present invention also provide a storage medium. Alternatively, in the present embodiment, the above storage medium may be arranged to store program code for performing the steps described in the foregoing.

Optionally, in this embodiment, the foregoing storage medium may include, but is not limited to, a U disk, a read only memory (ROM, Read-Only Memory), Random Access Memory (RAM), removable hard disk, disk or optical disk, etc., which can store program code.

The following embodiments describe the related processes of active/standby data backup and active/standby data recovery in detail in conjunction with FIG. 3 and FIG.

To ensure that the active and standby routes can be directly used on the standby board in the active/standby mode, you must ensure that the active and standby data are synchronized. For the sake of clarity, in the embodiment, the synchronization of the active and standby data into the control plane data synchronization and the forwarding plane data synchronization are respectively described, as shown in FIG. 3 and FIG. 4:

1. Control plane data synchronization in the active and standby environments

To ensure synchronization of active and standby data, control plane data synchronization has the following steps:

1) The backup board interface process needs to back up the interface data and the interface mapping index first;

2) The routing and forwarding management module of the control plane backs up routing information and ARP information;

3) The control plane requires data to be saved. It can be saved in the file or database mode to ensure that the master and the backup generate the same index, and the outbound interface information is unchanged. The active and standby routes can be directly used on the standby board.

2. In the active/standby environment, forwarding plane data synchronization

To ensure synchronization of active and standby data, there are several steps to synchronize plane data synchronization:

1) forwarding plane backup interface data and interface mapping index;

2) Forward the plane backup routing information, and synchronize the route obtained by the mainboard from the control plane to the new main control board;

3) Forward plane backup ARP information.

3. After the active/standby switchover, the forwarding plane data is restored.

After the active/standby switchover, the forwarding plane data recovery has the following steps:

1) The interface processing module will actively send the original port deletion and new port creation;

2) forwarding plane recovery interface information and routing data;

3) The forwarding plane sends routing data to the driver, and the data forwarding function of the forwarding plane is activated.

4. Control plane data recovery after active/standby switchover

After the active/standby switchover, the control plane data recovery has the following steps:

1) The interface processing module notifies the control platform interface to change;

2) The control plane interface process deletes and constructs the interface, and ensures that the corresponding port and the index are consistent with the data stored in the disk according to the saved data, so that the routing outbound interface information is unchanged, so that the active and standby synchronous routes can be directly used on the standby board;

3) Wait for the GR to re-create the forwarding instance after the GR is over;

4) Restore the original data communication route in the new forwarding domain, and complete the fast switching recovery of the data communication network.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (11)

An active/standby switching method based on dual masters includes: In the active/standby environment, the control plane and the forwarding plane respectively perform data synchronization, and save the synchronization data of the control plane; The main control board performs the active/standby switchover. The control plane and the forwarding plane respectively perform data recovery, wherein the control plane re-creates an interface according to the synchronization data of the saved disk. The active/standby switching method according to claim 1, wherein the data synchronization of the control plane comprises: The standby main control board interface process backup interface data and interface mapping index; The routing and forwarding management module of the control plane backs up routing information and address resolution protocol ARP information; The control plane backup data is saved. The active/standby switching method according to claim 1, wherein the data synchronization of the forwarding plane comprises: The forwarding plane backs up the interface data and an interface mapping index; The forwarding plane backs up the routing information and ARP information. The active/standby switching method according to claim 2, wherein the data recovery by the control plane comprises: The primary interface module sends the original port deletion and the new port creation. The forwarding plane recovers interface information and routing data; The forwarding plane sends the routing data to the driver, and the data forwarding function of the forwarding plane is activated. The active/standby switching method according to claim 3, wherein the data recovery by the control plane comprises: The main interface module advertises control platform interface changes; The control plane interface process re-creates an interface according to the saved data, wherein the newly created interface and the interface mapping index are consistent with the data in the save disk, so that the routing outbound interface information remains unchanged; Wait for the graceful restart packet GR to re-create the forwarding instance successfully. Restore the original data communication route in the new forwarding domain. The active/standby switching method according to any one of claims 1 to 5, wherein the data is saved by a file or a database. An active/standby switching device based on dual master control, comprising: The synchronization module is configured to synchronize the data synchronization of the control plane and the data of the forwarding plane in the active/standby environment, and Saving the synchronization data of the control plane; The switchover module is configured as the active/standby switchover of the dual main control board. And a recovery module configured to restore data of the control plane and the forwarding plane, so that the control plane re-creates an interface according to the synchronization data of the saved disk. The active/standby switching device according to claim 7, wherein the synchronization module comprises: a control plane interface backup submodule, configured as a backup of the interface data of the control plane and an interface mapping index; The control plane routing backup sub-module is set as the backup of the control plane routing information and ARP information; A storage submodule is set to save the backup data of the control plane. The master/slave switching device of claim 7, wherein the synchronization module further comprises: The forwarding plane interface backup submodule is set as the backup of the interface data of the forwarding plane and the interface mapping index; The forwarding plane routing backup submodule is set as the backup of the forwarding plane routing information and ARP information. The active/standby switching device of claim 8, wherein the recovery module comprises: The interface submodule is configured to send the original port deletion and new port creation notification. The forwarding plane recovery submodule is set to restore the interface information of the forwarding plane and the routing data; The routing sub-module is configured to deliver the routing data of the forwarding plane to the driver, and the data forwarding function of the forwarding plane is enabled. The active/standby switching device of claim 9, wherein the recovery module further comprises: The interface submodule is further configured to notify the control platform interface to change; The control plane recovery sub-module is configured to re-create the interface of the control plane according to the saved data, wherein the newly created interface and the interface mapping index are consistent with the data in the save disk, so that the routing outbound interface information remains unchanged; Create a submodule and set it to wait for the graceful restart packet GR to re-create the forwarding instance. The route recovery submodule is set to restore the original data communication route in the new forwarding domain.

Images