CN115250226A

CN115250226A - MLAG double-master fault recovery method, device, system, medium and equipment

Info

Publication number: CN115250226A
Application number: CN202210886327.8A
Authority: CN
Inventors: 田清越
Original assignee: Maipu Communication Technology Co Ltd
Current assignee: Maipu Communication Technology Co Ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-10-28
Anticipated expiration: 2042-07-26
Also published as: CN115250226B

Abstract

The MLAG double-master failure recovery method, device, system, medium and equipment are applied to the field of communication. When the first equipment detects that the MLAG networking system has double-master failure, role check information is sent to the second equipment through the double-homed accessed equipment, whether the change of the first equipment into the master equipment in the MLAG networking system is reasonable or not is detected according to the role check information sent by the second equipment, and the first equipment is configured to be the equipment role to be played in the MLAG networking system, so that the MLAG networking system is automatically recovered from the abnormal state of the double-master failure to the normal state of the single master equipment under the condition of not depending on manual intervention as far as possible.

Description

MLAG double-master fault recovery method, device, system, medium and equipment

Technical Field

The present application relates to the field of communications, and in particular, to a method, an apparatus, a system, a medium, and a device for recovering a Multi-chassis Link Aggregation Group (MLAG) dual master failure.

Background

The MLAG is a mechanism for implementing cross-device link aggregation, and can select one or more ports between two adjacent network devices to form a logical aggregation port, and then the logical aggregation port is used for performing dual-homing access on other devices, thereby forming an MLAG networking system. For other network devices, two network devices that make up the MLAG are virtualized into a logical virtual device.

Under normal conditions, one of two network devices of the MLAG networking is used as a master device, the other one is used as a slave device, and the two network devices are communicated and interacted through Peer-link and Keepalive. When the environment stably runs, the MLAG protocol message is transmitted by a two-layer network through a Peer-link, and Keepalive is kept alive by a three-layer network. After research, it is found that when two lines of Peer-link and Keepalive sequentially fail, the device roles of two network devices of the MLAG networking in the MLAG networking system become master devices, that is, an abnormal phenomenon of double master failures occurs, and the abnormal phenomenon can cause abnormal traffic forwarding.

Disclosure of Invention

In order to overcome at least one defect in the prior art, the present application provides a method, an apparatus, a system, a medium, and a device for recovering an MLAG dual master failure, which are used to automatically recover to a normal state after a dual master abnormal phenomenon occurs, and specifically include:

in a first aspect, the present application provides a method for recovering an MLAG dual master failure, which is applied to a first device serving as a slave device in an MLAG networking system, where the MLAG networking system further includes a second device forming an MLAG with the first device and a dual-homing access device, and the method includes:

when the first device detects that a double-master failure occurs in the MLAG networking system, role verification information is sent to the second device through the double-homed access device, wherein the double-master failure indicates that the device role of the first device is changed into a master device which is the same as that of the second device;

receiving, by the dual-homed access device, verification response information sent by the second device according to the role verification information;

and determining the role of the equipment which the equipment should play in the MLAG networking system according to the checking response information.

In a second aspect, the present application provides a method for recovering an MLAG dual master failure, which is applied to a dual access device in an MLAG networking system, where the MLAG networking system further includes a first device and a second device that form an MLAG, and the method includes:

receiving role checking information sent by the first device after the first device detects that a double-master failure occurs in the MLAG networking system, wherein the double-master failure indicates that a device role of the first device is changed from a slave device to a master device which is the same as that of the second device;

forwarding the role verification information to the second device, wherein the role verification information is used for indicating the second device to feed back verification response information to the first device according to the role verification information;

receiving the verification response information;

and forwarding the verification response information to the first equipment.

In a third aspect, the present application provides an MLAG networking system, where the MLAG networking system includes a dual-homing access device, and a first device and a second device that form an MLAG;

when the first device detects that a double-master failure occurs in the MLAG networking system, role verification information is sent to the double-access device, wherein the double-master failure indicates that the device role of the first device is changed from a slave device to a master device which is the same as the second device;

the dual-homing access device forwards the role checking information to the second device;

the second equipment sends verification response information to the double-homing accessed equipment according to the role verification information;

the equipment with the dual-homing access forwards the check response information to the first equipment;

and the first equipment determines the role of the equipment which the equipment should play in the MLAG networking system according to the checking response information.

In a fourth aspect, the present application provides an MLAG dual master failure recovery apparatus, which is applied to a first device serving as a slave device in an MLAG networking system, where the MLAG networking system further includes a second device forming an MLAG with the first device and a device performing dual homing access, where the apparatus includes:

an information transceiver module, configured to send role verification information to the second device through the dual-homed device when the first device detects that a dual-master failure occurs in the MLAG networking system, where the dual-master failure indicates that a device role of the first device changes to a master device that is the same as that of the second device;

the information transceiver module is further configured to receive, through the dual-homing device, verification response information sent by the second device according to the role verification information;

and the role checking module is used for determining the role of the equipment which the equipment should play in the MLAG networking system according to the checking response information.

In a fifth aspect, the present application provides an MLAG dual master failure recovery apparatus, which is applied to a dual access device in an MLAG networking system, where the MLAG networking system further includes a first device and a second device that form an MLAG, and the apparatus includes:

an information receiving module, configured to receive role check information sent by the first device after the first device detects that a dual master failure occurs in the MLAG networking system, where the dual master failure indicates that a device role of the first device is changed from a slave device to a master device that is the same as the second device;

the information forwarding module is used for forwarding the role verification information to the second device, wherein the role verification information is used for indicating the second device to feed back verification response information to the first device according to the role verification information;

the information receiving module is also used for receiving the verification response information;

the information forwarding module is further configured to forward the verification response information to the first device.

In a fifth aspect, the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the MLAG dual master failure recovery method or the dual master failure recovery method.

In a sixth aspect, the present application provides a network device comprising a processor and a memory, wherein the memory stores a computer program, and the computer program, when executed by the processor, implements the MLAG dual master failure recovery method or the dual master failure recovery method.

Compared with the prior art, the method has the following beneficial effects:

in the method, the apparatus, the system, the medium, and the device for recovering an MLAG dual master failure provided in this embodiment, when a first device detects that an MLAG networking system has a dual master failure, role check information is sent to a second device by a dual-homed device, whether it is reasonable to convert itself into a master device in the MLAG networking system is detected according to the role check information sent by the second device, and the MLAG networking system is configured as a device role to be assumed in the MLAG networking system, so that the MLAG networking system is automatically recovered from an abnormal state of the dual master failure to a normal state of a single master device without relying on manual intervention as much as possible.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic diagram of a link aggregation principle provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of an MLAG principle provided in an embodiment of the present application;

fig. 3 is a schematic diagram illustrating an interaction method in MLAG according to an embodiment of the present application;

FIG. 4 is a flowchart of an MLAG dual-master failure recovery method provided in an embodiment of the present application;

fig. 5 is a schematic diagram of interaction of MLAG-LACP messages provided in the embodiment of the present application;

fig. 6 is a second flowchart of a MLAG dual-master failure recovery method according to an embodiment of the present application;

fig. 7 is a schematic diagram of an MLAG dual-master failure recovery apparatus according to an embodiment of the present application;

FIG. 8 is a second schematic diagram of an MLAG dual-master failure recovery apparatus provided in the embodiments of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Icon: 101-an information transceiver module; 102-role checking module; 201-an information receiving module; 202-information forwarding module; 320-a memory; 330-a processor; 340-communication unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is noted that, in addition, the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Based on the above related statements, since the present embodiment relates to MLAG related technologies, in order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following explains related terms that the present embodiment may relate to.

1, peer-link: the direct link between two paired devices forming the MLAG is converged and used for interacting MLAG protocol messages and transmitting data traffic.

MLAG protocol: the self-interactive message of the MLAG comprises pairing detection and master-slave role election, and is currently communicated through a Peer-link two-layer link.

3.Keepalive: keep-alive detection between MLAG paired nodes, which communicates through a three-layer link, is used for judging whether the other side still survives between paired devices after Peer-link fails.

4, DHD: double-homed Device, a Device (or server) with dual homing access to MLAG.

5, MLAG: and a Multi-Chassis Link Aggregation Group, which is a cross-device Link Aggregation Group, and realizes the redundancy of the Link and the node.

6, MASTER: when a Peer-link fails, a MASTER device in the MLAG networking system changes the role relationship into MASTER _ ALONE.

SLAVE: when a Peer-link fails, the role relationship of the SLAVE devices in the MLAG networking system will become SLAVE _ SUSPEND.

Dual-Master: under the double MASTER conditions, if both the Peer-Link and the Keepalive are failed, the SLAVE node judges that the SLAVE node is completely disconnected with the MASTER node, the SLAVE node is upgraded to the MASTER node, the original MASTER node still exists, and at this time, two MASTER nodes exist, namely Dual-Master.

Stick M running-time: the device becomes the master runtime.

Based on the above description of related terms, the MLAG networking system according to the present embodiment is described below.

It should be understood that a conventional aggregated link is a single device and a single device interfacing, and if the link or one of the devices fails, the two devices cannot continue to communicate. As shown in fig. 1, there are 3 physical link connections between DeviceA (which may be a device or a host with other functions) and DeviceB, and then the 3 physical links are aggregated into a logical communication link through an aggregated link. Thus, not only is the communication bandwidth increased, but redundancy between the communication links is improved as compared to when there is only one physical link, however, when DeviceA or DeviceA fails therein, communication cannot be continued.

Therefore, the MLAG technique has been proposed for the problems of the conventional aggregated link. In the MLAG technology, ports on different devices of the MLAG system are aggregated into one logical interface, and even if one device fails or one aggregation link fails, the aggregation link cannot be completely failed, thereby ensuring reliable transmission of data traffic. As shown in fig. 2, the diagram includes three devices, i.e., DHD, node1, and Node2, and the MLAG networking system performs dual-homing of DHD to two devices, i.e., node1 and Node2, which perform cross-device link aggregation. Continuing with fig. 2, after Node1 and Node2 aggregate across device links, for a dual-homed DHD, two network devices (Node 1, node 2) are virtualized into a virtual device Node3 in a logical sense, so that the DHD establishes a link aggregation relationship with one device as if it were; thus, when any one of the Node1 and Node2 fails, the whole communication will not fail.

For Node1 and Node2 forming MLAG in fig. 2, it is assumed that the current device role of Node1 is master, and the current device role of Node2 is slave. As shown in fig. 3, the two devices perform communication interaction through Peer-link and Keepalive; when the environment stably runs, two-layer link transmission is carried out through a Peer-link message, and three-layer link transmission is carried out through a Keepalvin, so that whether the other side still survives is judged between the paired devices.

When the Peer-link fails, the transmission of the Peer-link message through a two-layer link is blocked, the MLAG port on the Node2 becomes the Err-disable state, and the Node2 is triggered to enter the Slave _ Suspend state. Node1 in the MLAG networking system is still in MASTER _ Alone state, that is, the MLAG networking system only has Node1 as the MASTER device at this time, and the MLAG port of Node1 can still forward the flow normally, which conforms to the expected data transfer mode of the MLAG networking system.

Thereafter, if the three-layer network used by Keepalive is interrupted or the link oscillates, the Node2 may receive a Lost event of Keepalive, and the Lost event may then trigger the state of the Node2 itself to become Master _ alone, and the port in Err-disable state on the Node2 may be restored to the UP state, thereby participating in traffic forwarding. At this time, it means that both Node2 and Node1 in the MLAG networking system become master devices, that is, a dual-master exception phenomenon occurs, and both of them participate in traffic forwarding, thereby causing traffic forwarding exception.

The message limited by Keepalive does not contain parameters required by role judgment, so even if Keepalive is recovered, the above abnormity still exists. However, research finds that even if parameters required for determining the color of an image are added to a Keepalive message, the Keepalive message is limited in that a Keepalive link needs to transmit through a three-layer link, and reasons of three-layer network interruption or link oscillation are more complex and various, and in many cases, manual intervention is required to recover the Keepalive link, so that even if the parameters required for determining the color of the image are added to the Keepalive message, self-recovery cannot be completely and automatically achieved.

It should be noted that the above prior art solutions have disadvantages which are the result of practical and thorough research conducted by the inventors, and therefore, the discovery process of the above problems and the solutions proposed by the embodiments of the present application in the following should be the contribution of the inventors to the present application in the process of invention creation, and should not be understood as technical contents known to those skilled in the art.

Therefore, this embodiment provides a method for recovering an MLAG dual master failure, which is applied to a first device serving as a slave device in an MLAG networking system, where the MLAG networking system further includes a second device forming an MLAG with the first device and a device with dual homing access. In the method, when a first device detects that a double-master failure occurs in an MLAG networking system, role check information is sent to a second device through a double-homed access device, whether the main device currently converted into the MLAG networking system is reasonable or not is determined according to the role check information sent by the second device, and the first device is configured to be a device role to be played in the MLAG networking system, so that the MLAG networking system is automatically recovered from an abnormal state of the double-master failure to a normal state of a single main device under the condition of not depending on manual intervention as far as possible.

The following describes in detail the steps involved in the MLAG dual master failure recovery method, which, as shown in fig. 4, includes:

S101A, when the first equipment detects that double-master failure occurs in the MLAG networking system, role checking information is sent to the second equipment through the double-home access equipment.

Wherein the dual master failure indicates that the device role of the first device becomes the same master as the second device.

With continued reference to fig. 3, for the dual-homing DHD in the figure, two network devices Node1 and Node2 forming the MLAG are regarded as a virtual device in a logical sense, and if the current device role of Node1 therein is a master device and the current device role of Node2 is a slave device, that is, node1 in fig. 3 may be regarded as a second device in the present embodiment, node2 may be regarded as a first device, and the DHD is a device for dual-homing MLAG. Of course, if Node1 in fig. 3 is a slave in MLAG and Node2 is a master in MLAG, node1 at this time may be regarded as a first device in this embodiment, and Node2 may be regarded as a second device in this embodiment.

When the standby role of Node2 is changed into the master equipment the same as that of Node1, two master equipment exist in the MLAG networking system at the same time, namely double master faults occur; node2 sends role check information to Node1 through DHD in order to restore the MLAG networking system to normal state.

It should be understood that, since data interaction is usually performed between the first device and the second device through the peerlink link, the keepalive link is used to detect whether there is a double-master situation in the system, when the Peer-link and the keepalive link are both abnormal, the two devices cannot judge roles, and an environment with the double-master abnormality is created, and after the Peer-link and the keepalive link are both abnormal, interaction can be performed between the two devices, and in this embodiment, role information interaction is performed through the communication link of the double-home access device. To enable the dual-homed device to forward the role check information, step S101A may include the following specific embodiments:

S101A-1, role verification information is obtained.

S102A-2, the role checking information is packaged into a request message, wherein the request message comprises a forwarding identifier.

S102A-3, the request message is sent to the dual-homing access device, wherein the forwarding identifier in the request message is used for indicating the dual-homing access device to forward the role verification information to the second device.

Therefore, in the above embodiment, the request packet sent by the first device to the dual-homed access device carries the forwarding identifier, so that after receiving the request packet, the dual-homed access device forwards the request packet to the second device if detecting that the request packet carries the forwarding identifier.

Research further finds that, in the MLAG networking system, a communication protocol between the first device and the dual-homed access device includes an LACP protocol, and the LACP protocol provides a reserved field for secondary expansion, where a partial structure of the LACP protocol is as follows:

based on the reserved field in the LACP, the step S102A-2 may include the following implementation modes to add the forwarding identifier in the request message:

the first device may encapsulate the role verification information into a request message according to an LACP protocol, where a reserved field in the LACP protocol is marked as a forwarding identifier. Therefore, compared with the construction of a new private protocol, the forwarding identifier is added on the basis of the LACP, so that a communication protocol does not need to be added between the first device and the dual-homed access device, and the increase of the complexity of the existing network system is avoided.

With continued reference to fig. 4, after step S101A, the MLAG dual master failure recovery method further includes:

and S102A, receiving verification response information sent by the second equipment according to the role verification information through the dual-homing access equipment.

The method comprises the steps that a request message for packaging verification response information is sent to the dual-homing access device by the first device, wherein the request message is similar to a request message sent to the dual-homing access device by the first device, and a forwarding identifier is also carried in a response message for packaging the verification response information, so that the dual-homing access device forwards the verification response information to the first device; therefore, this will not be described in detail.

And S103A, determining the role of the equipment which the equipment should play in the MLAG networking system according to the verification response information.

In this way, in the above embodiment, after detecting that the MLAG networking system has a double master failure, in order to avoid that both the Peer-link and the keepalive link are abnormal and cannot be recovered, the first device interacts with the dual-homing access device to determine the device role that the device should take in the MLAG networking system, so as to automatically recover the MLAG networking system from the abnormal state of the double master failure to the normal state of the single master device as much as possible.

In order to enable the first device to determine a device role that the first device should assume in the MLAG networking system, step S103A may include the following specific embodiments:

S103A-1, first election information of the first device is obtained.

The verification response information comprises second election information of the second device, and the first election information and the second election information respectively represent information used for performing main device election by the first device and the second device, so that whether the first device is more suitable for taking the role of the main device can be determined by comparing the first election information and the second election information. Therefore, step S103A further includes:

S103A-2, comparing the first election information with the second election information to obtain a role election result between the first device and the second device.

In this embodiment, the first election information and the second election information respectively include a plurality of state information. In some related technologies, the first device may further quantize multiple kinds of state information of the first device, and then obtain a first weighted value of the first device; after quantizing the multiple kinds of state information of the second equipment, solving a second weighted value of the multiple kinds of state information; and finally, taking the comparison result between the first weighted value and the second weighted value as the role election result.

However, research finds that the method is a combination of multiple factors for comparison, and when the Peer-link and the keepalive link between the first device and the second device are frequently abnormal, the method is easy to cause the role of the master device to be frequently switched between the first device and the second device. Further, research shows that if the reason that the first device is changed from the slave device to the master device is not that the second device is abnormal, double-master failure recovery is performed in a manner that the second device is continuously used as the master device and the first device is recovered to the slave device, which is more beneficial to keeping the network stable. In order to achieve the recovery effect, the running time of the two devices can be preferentially compared as the running time of the main device; therefore, in the present embodiment, different priority orders are respectively configured for the plurality of types of status information.

For example, the various status information includes an operation duration as a master, a system priority in the MLAG networking system, and a system MAC address; the priority among the various status information is: the running time as the main equipment is longer than the system priority in the MLAG networking system; the system priority in the MLAG networking system is greater than the system MAC address. Of course, the above various status information is not limited thereto, and the technician may also make appropriate adjustments as needed when implementing the present embodiment.

Therefore, the comparison method in step S103A-2 may include the following embodiments:

S103A-2-1, comparing the multiple state information of the second equipment with the multiple state information of the first equipment in sequence according to the configured priority order to obtain a first comparison result with difference;

S103A-2-2, taking the first comparison result with difference as the role election result between the first device and the second device.

The exemplary description continues by taking the information such as the operation duration of the master device, the system priority in the MLAG networking system, and the system MAC address as an example. That is, in this example, the plurality of types of state information of the second device include:

the running time of the second device as the master device, the system priority of the second device in the MLAG networking system, and the system MAC address of the second device.

Similarly, the plurality of status information of the first device includes:

the system comprises the running time of the first device as a master device, the system priority of the first device in the MLAG networking system and the system MAC address of the first device.

Based on the multiple state information, the first device may sequentially compare the multiple state information of the second device with the multiple state information of the first device according to the configured priority order to obtain a first comparison result with a difference; the first differentiated comparison is then used as the role election between the first device and the second device.

S103A-3, determining the device role matched with the role election result according to the role election result.

When the role election result shows that the first device is more suitable to be used as a main device compared with the second device, the current device role is kept unchanged; on the contrary, the second device is more suitable to be used as the master device, and at the moment, the first device restores the device role to be the slave device, so that the state of only one master device can be automatically restored from the double-master abnormal state without manual intervention.

In order to make the technical personnel easier to implement the present solution, the following describes in detail the interaction manner between the devices in the MLAG networking system with reference to specific fig. 5. Assume that the second device is a Node1 Node in the graph, the first device is a Node2 Node in the graph, and the dual-homing device is a DHD device in the graph.

In order to distinguish common LACP messages conveniently, a reserved field in an LACP protocol message is named as MLAG-LACP, messages with MLAG-LACP fields marked as 1 are collectively called as MLAG-LACP messages, wherein 1 is a forwarding identifier; the MLAG-LACP message comprises an MLAG-LACP request message carrying role checking information and an MLAG-LACP response message carrying role response information. Whereas in the normal LACP message, the MLAG-LACP field is always marked 0.

And only when the Peer-link and Keepalive are abnormal, so that the MLAG networking system is in a double-main fault abnormal state, the Node2 Node and the Node1 Node can send out a message marking the MLAG-LACP field as 1.

The DHD device processes the LACP messages differently through the MLAG-LACP marks. That is, the DHD receives the MLAG-LACP request message or the MLAG-LACP response message and then sends the message from another root port, while the normal LACP message is not forwarded, so that the sending and receiving of the normal LACP message are not affected.

After the Node1 Node receives the role verification information sent by the Node2 Node by using the MLAG-LACP request message, the Node1 Node responds to the role verification information and sends verification response information to the Node2 Node. The Node2 Node compares the operation time of the Node1 Node as the master device, the system priority of the Node1 Node in the MLAG networking system and the system MAC address of the Node1 Node in turn according to the following priority and judgment principle by checking the response information:

1. as the operation duration of the master device, the longer the time is, the more suitable the master device is;

2. the smaller the system priority in the MLAG networking system, the more suitable the system priority is as the master device;

3. the smaller the value of the system MAC address is, the more suitable the system MAC address is as a master device;

node2 compares the operation time length of the Node as the master device with the operation time length of the Node1 as the master device, if Node1 is larger than Node2, node1 should actually take the device role of the master device in the MLAG networking system, and Node2 should actually take the device role of the slave device. On the contrary, node1 should actually take the role of a slave device in the MLAG networking system, and Node2 should actually take the role of a master device.

If the running time lengths of the Node1 and the Node2 as main equipment are equal, the Node1 compares the system priority of the Node1 in the MLAG networking system with the system priority of the Node2 in the MLAG networking system. And so on until determining the device role Node2 should assume in the MLAG networking system.

Similarly, for Node1, after Node1 receives the role check information sent by Node2, the same determination method as that performed by Node2 is used to determine the role that Node1 should assume in the MLAG networking system, and therefore this embodiment is not described in detail again.

Therefore, in the above example, when Node1 detects that a dual master abnormality occurs in the MLAG networking system, role check information is sent to Node2 through the DHD device, and multiple state information in the role check information sent by Node2 is sequentially compared with multiple state information of itself according to a pre-configured priority order, and the comparison with the first difference is used as a role election result to determine the device role that itself should play in the MLAG networking system, so as to automatically recover from the abnormal state of the dual master failure to the normal state of the single master device as much as possible.

It can be seen from the above embodiments that the MLAG networking system automatically recovers from the abnormal state of the dual master failure to the normal state of the single master device, and the device requiring dual homing access forwards information between the first device and the second device; therefore, the present embodiment further provides an MLAG dual master failure recovery method applied to a dual homing device in an MLAG networking system. The MLAG networking system further comprises a first device and a second device which form the MLAG.

The steps involved in the method are described in detail below with reference to fig. 6, which, as shown in fig. 6, comprises:

S101B, role checking information sent by the first equipment after the first equipment detects that the MLAG networking system has double-master failure is received.

Wherein the dual master failure indicates that the device role of the first device is changed from the slave device to the same master device as the second device.

S102B, the role verification information is forwarded to the second equipment.

And the role verification information is used for indicating the second equipment to feed back verification response information to the first equipment according to the role verification information.

S103B, receiving the verification response information.

And S104B, forwarding the verification response information to the first equipment.

The verification information is encapsulated in the request message, so that in an optional implementation manner, if the request message carries the forwarding identifier, the dual-homed device forwards the role verification information to the second device.

For the request message, the communication protocol between the first device and the dual-homing access device comprises an LACP protocol, and the protocol comprises a reserved field which can be expanded secondarily; therefore, the request message may be encapsulated based on the LACP protocol, and in the corresponding specific implementation:

and if the reserved field of the LACP in the request message is marked as the forwarding identifier, the dual-homing access device forwards the role check information to the second device. Therefore, the existing communication protocol is fully utilized, and the complexity of the existing network system is prevented from being increased.

In summary, this embodiment further provides an MLAG networking system, where the MLAG networking system includes a dual access device, and a first device and a second device that form an MLAG.

For the system, when the first device detects that a double-master failure occurs in the MLAG networking system, role verification information is sent to the double-homed device, wherein the double-master failure indicates that the device role of the first device is changed from the slave device to the master device which is the same as the second device.

And the dual-homing accessed equipment forwards the role verification information to the second equipment.

And the second equipment sends verification response information to the double-homing accessed equipment according to the role verification information.

And the equipment with the dual-homing access forwards the verification response information to the first equipment.

And the first equipment determines the role of the first equipment which should be assumed in the MLAG networking system according to the check response information.

Based on the same inventive concept as the MLAG dual master failure recovery method for the first device in the MLAG networking system, this embodiment further provides an MLAG dual master failure recovery apparatus, which is applied to the first device serving as a slave device in the MLAG networking system, where the MLAG networking system further includes a second device forming an MLAG with the first device and a dual-homing-in device.

It should be understood that the MLAG dual-master failure recovery apparatus includes at least one software functional module, which may be stored in a memory in a software form or solidified in an Operating System (OS) of the first device. The processor in the first device is configured to execute the executable module stored in the memory. For example, the MLAG dual master failure recovery apparatus includes software functional modules, computer programs, and the like. Referring to fig. 7, functionally, the MLAG dual master failure recovery apparatus may include:

the information transceiver module 101 is configured to, when detecting that a MLAG networking system has a dual master failure, send role verification information to a second device through a dual-homed device in the MLAG networking system, where the dual master failure indicates that a device role of the first device changes into a master device that is the same as that of the second device.

The information transceiver module 101 is further configured to receive, through the dual-homing device, verification response information sent by the second device according to the role verification information.

In the present embodiment, the information transceiver module 101 is used to implement steps S101A-S102A in fig. 4, and for the detailed description of the information transceiver module 101, reference may be made to the detailed description of S101A-S102A.

And the role checking module 102 is configured to determine, according to the checking response information, a device role that the first device should assume in the MLAG networking system.

In this embodiment, the role verification module 102 is configured to implement step S103A in fig. 4, and for a detailed description of the role verification module 102, refer to a detailed description of S103A.

It should be noted that, since the MLAG dual master failure recovery apparatus applied to the first device in the MLAG networking system and the MLAG dual master failure recovery method applied to the first device in the MLAG networking system have the same inventive concept, the information transceiver module 101 and the role verification module 102 may also be used to implement other steps or sub-steps of the MLAG dual master failure recovery method, which is not described in detail in this embodiment.

Based on the same inventive concept as the MLAG dual master failure recovery method for the dual-homed access device in the MLAG networking system, the present embodiment also provides an MLAG dual master failure recovery apparatus, which is applied to the dual-homed access device in the MLAG networking system. The MLAG networking system further includes a first device and a second device constituting the MLAG.

It should be understood that the MLAG dual-master failure recovery apparatus also includes at least one software functional module which can be stored in a memory in a software form or solidified in an Operating System (OS) of the first device. The processor in the first device is configured to execute the executable modules stored in the memory. For example, the MLAG dual master failure recovery apparatus includes software functional modules, computer programs, and the like. Referring to fig. 8, functionally, the MLAG dual master failure recovery apparatus may include:

an information receiving module 201, configured to receive role verification information sent by a first device after the first device detects that a double master failure occurs in an MLAG networking system, where the double master failure indicates that a device role of the first device is changed from a slave device to a master device that is the same as a second device.

In this embodiment, the information receiving module 201 is configured to implement step S101B in fig. 6, and for a detailed description of the information receiving module 201, reference may be made to a detailed description of step S101B.

And the information forwarding module 202 is configured to forward the role verification information to the second device, where the role verification information is used to instruct the second device to feed back verification response information to the first device according to the role verification information.

In this embodiment, the information forwarding module 202 is configured to implement step S102B in fig. 6, and for a detailed description of the information forwarding module 202, reference may be made to a detailed description of step S102B.

The information receiving module is also used for receiving the verification response information.

In this embodiment, the information receiving module 201 is configured to implement step S103B in fig. 6, and for a detailed description of the information receiving module 201, reference may be made to a detailed description of step S103B.

The information forwarding module is further used for forwarding the verification response information to the first device.

In this embodiment, the information forwarding module 202 is configured to implement step S104B in fig. 6, and for a detailed description of the information forwarding module 202, reference may be made to a detailed description of step S104B.

It should also be noted that, since the MLAG dual master failure recovery apparatus applied to the dual-homed device in the MLAG networking system and the MLAG dual master failure recovery method applied to the dual-homed device in the MLAG networking system have the same inventive concept, the information receiving module 201 and the information forwarding module 202 may also be used to implement other steps or sub-steps of the MLAG dual master failure recovery method, which is not described in detail in this embodiment.

In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

It should also be understood that the above embodiments, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application.

Therefore, the present embodiment further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the MLAG dual master failure recovery method applied to the first device or the dual homing-access device provided by the present embodiment. The computer-readable storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, which can store program codes.

As shown in fig. 9, the embodiment further provides a network device, which may include a processor 330 and a memory 320. The processor 330 and the memory 320 may communicate via a system bus. Also, the memory 320 stores a computer program.

When the communication device is the first device in the above embodiments, the processor implements the MLAG dual master failure recovery method applied to the first device provided in the present embodiment by reading and executing the computer program corresponding to the above embodiments in the memory 320.

When the communication device is a dual-homing device in the above embodiment, the processor reads and executes the computer program corresponding to the above embodiment in the memory 320, so as to implement the MLAG dual-master failure recovery method applied to the dual-homing device provided in this embodiment.

With continued reference to fig. 9, the communication device further comprises a communication unit. The memory 320, processor 330 and communication unit 340 elements of the communication device are electrically connected to each other, directly or indirectly, to enable data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines.

The memory 320 may be an information recording device based on any electronic, magnetic, optical or other physical principle for recording execution instructions, data, and the like. In some embodiments, the memory 320 may be, but is not limited to, volatile memory, non-volatile memory, a storage drive, and the like.

Wherein the volatile Memory may be, for example only, a Random Access Memory (RAM). The nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an electrically Erasable Programmable Read-Only Memory (EEPROM), a flash Memory, or the like; the storage drive may be a magnetic disk drive, a solid state drive, any type of storage disk (e.g., optical disk, DVD, etc.), or similar storage medium, or combinations thereof, etc.

The communication unit 340 is used for transceiving data through a network. In some embodiments, the Network may include a wired Network, a Wireless Network, a fiber optic Network, a telecommunications Network, an intranet, the internet, a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), a WLAN, a Metropolitan Area Network (MAN), a Wide Area Network (WAN), a Public Switched Telephone Network (PSTN), a bluetooth Network, a ZigBee Network, or a Near Field Communication (NFC) Network, or the like, or any combination thereof. In some embodiments, the network may include one or more network access points. For example, the network may include wired or wireless network access points, such as base stations and/or network switching nodes, through which one or more components of the service request processing system may connect to the network to exchange data and/or information.

The processor 330 may be an integrated circuit chip having signal processing capabilities, and may include one or more processing cores (e.g., a single-core processor or a multi-core processor). Merely by way of example, the Processor may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), an Application Specific Instruction Set Processor (ASIP), a Graphics Processing Unit (GPU), a Physical Processing Unit (PPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a Programmable Logic Device (PLD), a controller, a microcontroller Unit, a Reduced Instruction Set computer (Reduced Instruction Set computer), a microprocessor, or the like, or any combination thereof.

It should be understood that the apparatus and method disclosed in the above embodiments may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The above description is only for various embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and all such changes or substitutions are included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An MLAG double-master failure recovery method is applied to a first device serving as a slave device in an MLAG networking system, the MLAG networking system further comprises a second device forming an MLAG with the first device and a device with double-homing access, and the method comprises the following steps:

when detecting that a double-master failure occurs in the MLAG networking system, sending role check information to the second equipment through the double-homed access equipment, wherein the double-master failure indicates that the equipment role of the equipment becomes the same master equipment as the second equipment;

and determining the role of the equipment in the MLAG networking system according to the verification response information.

2. The MLAG dual-master failure recovery method according to claim 1, wherein the sending role check information to the second device by the dual-homed device comprises:

acquiring the role verification information;

packaging the role checking information into a request message, wherein the request message comprises a forwarding identifier;

and sending the request message to the dual-homing device, wherein the forwarding identifier in the request message is used for indicating the dual-homing device to forward the role checking information to the second device.

3. The MLAG dual master failure recovery method according to claim 2, wherein a communication protocol between the first device and the dual homed device includes an LACP protocol, and the encapsulating the role check information into a request packet includes:

and according to an LACP protocol, packaging the role checking information into the request message, wherein a reserved field in the LACP protocol is marked as the forwarding identifier.

4. The MLAG dual-master failure recovery method according to claim 1, wherein the determining, according to the check response information, a device role of the device in the MLAG networking system includes:

acquiring first election information of the first device, wherein the verification response information comprises second election information of the second device, and the first election information and the second election information respectively represent information used for performing main device election by the first device and the second device;

comparing the first election information with the second election information to obtain a role election result between the first device and the second device;

and determining the role of the equipment matched with the role election result according to the role election result.

5. The MLAG dual-master failure recovery method of claim 4, wherein the first election information and the second election information respectively comprise a plurality of kinds of state information, and the plurality of kinds of state information are respectively configured with different priorities; the comparing the first election information with the second election information to obtain a role election result between the first device and the second device includes:

comparing the multiple state information of the second equipment with the multiple state information of the first equipment in sequence according to the priority order to obtain a first comparison result with difference;

and taking the first comparison result with difference as the role election result between the first device and the second device.

6. The MLAG double-master failure recovery method of claim 5, wherein the multiple kinds of status information comprise an operation duration as a master, a system priority in the MLAG networking system and a system MAC address;

the priority order among the plurality of kinds of state information is:

the operation time length as the main equipment is greater than the system priority in the MLAG networking system;

and the system priority in the MLAG networking system is greater than the system MAC address.

7. An MLAG double-master failure recovery method is characterized in that the method is applied to a double-homing access device in an MLAG networking system, the MLAG networking system further comprises a first device and a second device which form an MLAG, and the method comprises the following steps:

receiving role checking information sent by the first device after the first device detects that a double-master failure occurs in the MLAG networking system, wherein the double-master failure indicates that a device role of the first device is changed from a slave device to a master device which is the same as the second device;

receiving the verification response information;

and forwarding the verification response information to the first equipment.

8. The MLAG dual-master failure recovery method of claim 7, wherein encapsulating the verification information in a request message and forwarding the role check information to the second device comprises:

and if the request message carries a forwarding identifier, forwarding the role checking information to the second equipment.

9. The MLAG dual-master failure recovery method according to claim 8, wherein the request packet is encapsulated based on an LACP protocol, and if the request packet carries a forwarding identifier, the method of forwarding the role check information to the second device includes:

and if the reserved field of the LACP protocol in the request message is marked as the forwarding identifier, forwarding the role checking information to the second equipment.

10. An MLAG networking system is characterized in that the MLAG networking system comprises a dual-homing access device, a first device and a second device which form an MLAG;

11. An MLAG dual master failure recovery apparatus, applied to a first device serving as a slave device in an MLAG networking system, wherein the MLAG networking system further includes a second device forming an MLAG with the first device and a dual homing access device, and the apparatus includes:

an information transceiver module, configured to send role check information to the second device through the dual-homed device when the first device detects that a dual-master failure occurs in the MLAG networking system, where the dual-master failure indicates that a device role of the first device changes to a master device that is the same as that of the second device;

the information transceiver module is further configured to receive, by the dual-homing device, verification response information sent by the second device according to the role verification information;

12. The utility model provides a two main fault recovery devices of MLAG, characterized in that, be applied to the equipment of the two access of returning in the MLAG networking system, the MLAG networking system still includes the first equipment and the second equipment of constitution MLAG, the device includes:

the information forwarding module is used for forwarding the role verification information to the second equipment, wherein the role verification information is used for indicating the second equipment to feed back verification response information to the first equipment according to the role verification information;