CN115250226B - MLAG double-master fault recovery method, device, system, medium and equipment - Google Patents
MLAG double-master fault recovery method, device, system, medium and equipment Download PDFInfo
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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Abstract
The MLAG double-main fault recovery method, device, system, medium and equipment provided by the application are applied to the field of communication. After detecting that the double-master fault occurs in the MLAG networking system, the first device sends role verification information to the second device through the double-master accessed device, detects whether the role verification information sent by the second device is reasonable or not according to the role verification information sent by the second device, configures the first device into a device role which should be acted in the MLAG networking system, and automatically restores the MLAG networking system from an abnormal state of the double-master fault to a normal state of a single master device under the condition that the first device does not rely on manual intervention as much as possible.
Description
Technical Field
The application relates to the field of communication, in particular to a method, a device, a system, a medium and equipment for recovering double main faults of an MLAG (Multi-chassis Link Aggregation Group, inter-equipment link aggregation group).
Background
The MLAG is a mechanism for realizing cross-device link aggregation, and can select one or more ports between two adjacent network devices to form a logic aggregation port for other devices to perform dual-homing access so as to form an MLAG networking system. For other network devices, two network devices constituting the MLAG are virtualized into a virtual device in a logical sense.
In normal conditions, one of two network devices for MLAG networking is used as a master device, and the other one is used as a slave device, and communication interaction is carried out between the two network devices through Peer-link and keep alive. When the environment is stable, the MLAG protocol message is transmitted through the Peer-link by the two-layer network, and the keep-alive by the three layers. After research, it is found that when two lines of the Peer-link and the Keepalive sequentially fail, the 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 failure occurs, and the abnormal phenomenon can cause abnormal flow forwarding.
Disclosure of Invention
In order to overcome at least one of the defects in the prior art, the application provides a method, a device, a system, a medium and equipment for recovering MLAG double-main fault, which are used for automatically recovering to a normal state after double-main abnormal phenomenon occurs, and specifically comprise the following steps:
in a first aspect, the present application provides a method for recovering a double-master failure of an MLAG, 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 that forms an MLAG with the first device, and a device for double-homing access, where the method includes:
When the first device detects that the MLAG networking system has a double-master fault, role verification information is sent to the second device through the double-master accessed device, wherein the double-master fault indicates that the role of the first device becomes the same master device as that of the second device;
receiving check response information sent by the second equipment according to the role check information through the dual-homing access equipment;
and determining the equipment role which the equipment should take in the MLAG networking system according to the verification response information.
In a second aspect, the present application provides a method for recovering double main failures of an MLAG, which is applied to a device for double return access in an MLAG networking system, where the MLAG networking system further includes a first device and a second device that compose the MLAG, and the method includes:
receiving role verification information sent by the first device after the first device detects that the MLAG networking system has double-master faults, wherein the double-master faults indicate that the device role of the first device is changed from slave device to master device identical to 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 device.
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 compose an MLAG;
when the first device detects that the MLAG networking system has a double-master fault, role verification information is sent to the double-master accessed device, wherein the double-master fault indicates that the role of the first device is changed from slave device to master device which is the same as that of the second device;
the dual-homing access device forwards the role verification information to the second device;
the second equipment sends verification response information to the dual-homing access equipment according to the role verification information;
the dual-homing access device forwards the verification response information to the first device;
and the first equipment determines the equipment role which the equipment should take in the MLAG networking system according to the verification response information.
In a fourth aspect, the present application provides an MLAG dual-master fault recovery apparatus, 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 that forms an MLAG with the first device, and a dual-homing access device, where the apparatus includes:
The information receiving and transmitting module is used for sending role verification information to the second equipment through the equipment accessed by the double-master fault when the first equipment detects that the double-master fault occurs in the MLAG networking system, wherein the double-master fault indicates that the equipment role of the first equipment is changed into the same master equipment as that of the second equipment;
the information receiving and transmitting module is further used for receiving verification response information sent by the second device according to the role verification information through the dual-homing access device;
and the role checking module is used for determining the role of the equipment which the equipment should take 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, applied to a dual-homing access device in an MLAG networking system, where the MLAG networking system further includes a first device and a second device that compose an MLAG, the apparatus includes:
the information receiving module is used for receiving role verification information sent by the first equipment after detecting that double-master faults occur in the MLAG networking system, wherein the double-master faults indicate that the equipment role of the first equipment is changed from slave equipment to master equipment identical to that of the second equipment;
The information forwarding module is used for forwarding the role verification information to the second device, and 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, where the computer program, when executed by a processor, implements the MLAG dual master fault recovery method or the dual master fault recovery method.
In a sixth aspect, the present application provides a network device, where the network device includes a processor and a memory, where the memory stores a computer program, and the computer program implements the MLAG dual-master fault recovery method or the dual-master fault recovery method when executed by the processor.
Compared with the prior art, the application has the following beneficial effects:
in the method, the device, the system, the medium and the equipment for recovering the MLAG double-master fault, after the first equipment detects that the MLAG networking system has double-master fault, role verification information is sent to the second equipment through the double-master accessed equipment, whether the main equipment in the MLAG networking system is reasonable or not is detected according to the role verification information sent by the second equipment, and the main equipment is configured to be the equipment role which should be acted in the MLAG networking system, so that the MLAG networking system is automatically recovered from the abnormal state of the double-master fault to the normal state of the single main equipment under the condition that the manual intervention is not relied on 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 needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
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 the MLAG according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an interaction mode in an MLAG according to an embodiment of the present application;
FIG. 4 is a flowchart of a method for recovering MLAG dual master failure according to an embodiment of the present application;
FIG. 5 is a schematic diagram of MLAG-LACP message interaction provided by the embodiment of the application;
FIG. 6 is a second flowchart of a method for recovering MLAG dual master failure according to an embodiment of the present application;
FIG. 7 is a schematic diagram of an MLAG dual-master failure recovery device according to an embodiment of the present application;
FIG. 8 is a second schematic diagram of an MLAG dual-master failure recovery device according to an embodiment 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 receiving and transmitting module; 102-a role verification module; 201-an information receiving module; 202-an information forwarding module; 320-memory; 330-a processor; 340-communication unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Based on the above related statements, since the present embodiment relates to the MLAG related technology, for the purpose, technical solutions and advantages of the present embodiment are made clear, the following explains related terms that may be related to the present embodiment.
Peer-link: and the direct link aggregation between the two paired devices forming the MLAG is used for interacting MLAG protocol messages and transmitting data traffic.
Mlag protocol: the MLAG self-interaction message comprises pairing detection and master-slave role election, and is currently communicated through a Peer-link two-layer link.
Keepalive: the keep-alive detection between the MLAG paired nodes is carried out through three-layer links and is used for judging whether the counterpart still survives or not between paired devices after the Peer-link faults.
Dhd: double-homed Device, device (or server) dual homed access MLAG.
MLAG: multi-Chassis Link Aggregation Group, across the device link aggregation group, achieves redundancy of links and nodes.
Master: the MASTER device in the MLAG networking system changes the role relationship into MASTER_ALONE after the failure of the Peer-link.
SLAVE: the SLAVE devices in the MLAG networking system change the role relationship into SLAVE_SUSPEND after the failure of the Peer-link.
Dual-Master: in the double MASTER situation, if both the Peer-Link and the keep alive are failed, the SLAVE node judges that the SLAVE node is completely out of connection with the MASTER node, the SLAVE node is updated to the MASTER node, and the original MASTER node still exists, and then two MASTER nodes exist, namely the Dual-Master.
The stilling-time: the device becomes the master runtime.
Based on the above description of related technical terms, the MLAG networking system according to this embodiment is described below.
It should be appreciated that a conventional aggregated link is a single device to single device interface, and if the link fails or one of the devices fails, both will not be able to continue communicating. As shown in fig. 1, 3 physical links are connected between DeviceA (which may be a device or a host with other functions) and DeviceB in the figure, and then the 3 physical links are aggregated into one communication link in a logical sense through an aggregation link. Thus, not only is the communication bandwidth increased, but also the redundancy between the communication links increased compared to when there is only one physical link, however, when DeviceA or DeviceA fails therein, communication cannot be continued.
Therefore, MLAG technology is proposed for the problems existing in the conventional aggregated link. In the MLAG technology, ports on different devices of an MLAG system are aggregated into one logic interface, and even if one device fails or one aggregation link fails, the aggregation link cannot be completely disabled, so that reliable transmission of data traffic is ensured. As shown in fig. 2, the figure includes three devices, namely DHD, node1 and Node2, and the MLAG networking system is to connect DHD to two devices Node1 and Node2 for cross-device link aggregation. With continued reference to fig. 2, after the link aggregation between the Node1 and the Node2 across devices, for the dual-homing access DHD, two network devices (Node 1, node 2) are virtualized into a virtual device Node3 in a logical sense, so that the DHD is as if it has established a link aggregation relationship with one device; thus, when any one of the devices in Node1 and Node2 fails, the whole communication will not fail.
For Node1 and Node2 constituting the MLAG in fig. 2, it is assumed that the current device role of Node1 is a master device and the current device role of Node2 is a slave device. As shown in fig. 3, communication interaction is carried out between the two through a Peer-link and a Keepalive; when the environment is stable, the Peer-link message is used for transmitting a two-layer link, and the keep-alive link is used for transmitting a three-layer link, so that whether the other party still survives or not can be judged between the paired devices.
When the Peer-link fails, the transmission of the Peer-link message from the two-layer link is blocked, the MLAG port on the Node2 can be changed into an Err-disable state, and the Node2 is triggered to enter a slave_suspend state. The Node1 in the MLAG networking system is still in the MASTER_Alone state, namely the MLAG networking system only has the Node1 as a main device at the moment, the MLAG port of the Node1 can still forward the flow normally, and the MLAG networking system accords with the expected data flow mode of the MLAG networking system.
After that, if the three-layer network used by Keepalive is interrupted or the link oscillates, the Node2 receives a Lost event of Keepalive, the Lost event triggers the state of the Node2 to become master_clone, and the port in Err-disable state on the Node2 is restored to be UP state, thereby participating in traffic forwarding. At this time, it means that Node2 and Node1 in the MLAG networking system become master devices, that is, a dual-master anomaly phenomenon occurs, and both participate in traffic forwarding, thereby causing traffic forwarding anomaly.
The Keepalive message does not contain parameters necessary for role determination, and therefore, even after Keepalive is restored, the above abnormality still exists. However, the research finds that even if the parameters required for role determination are added to the Keepalive message, the parameters are limited by that the Keepalive link needs to travel through three-layer link transmission, and the 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 role determination are added to the Keepalive message, the self recovery cannot be fully and automatically realized.
It should be noted that the above solutions in the prior art have all the drawbacks that the inventors have obtained after they have practiced and studied carefully, and therefore, the discovery process of the above problems and the solutions that the embodiments of the present application in the following description address the above problems should be considered as contributions of the inventors to the application in the inventive process, and should not be construed as being what is known to those skilled in the art.
Therefore, the embodiment provides a method for recovering double-master failure of an MLAG, which is applied to a first device serving as a slave device in an MLAG networking system, wherein the MLAG networking system further comprises a second device forming an MLAG with the first device and a device for double-homing access. In the method, when a first device detects that a double-master fault occurs in an MLAG networking system, role verification information is sent to a second device through a double-master accessed device, whether the master device in the MLAG networking system is converted into a reasonable state or not is determined according to the role verification information sent by the second device, and the first device is configured to be a device role which is supposed to be acted in the MLAG networking system, so that the MLAG networking system is automatically restored to the normal state of a single master device from the abnormal state of the double-master fault under the condition of not depending on manual intervention as much as possible.
The steps involved in the MLAG dual master failure recovery method are described in detail below, as shown in fig. 4, and the method includes:
S101A, when the first equipment detects that the MLAG networking system has double-master faults, role verification information is sent to the second equipment through the double-master access equipment.
Wherein a 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 DHD with dual homing access in the drawing, two network devices Node1 and Node2 forming the MLAG are regarded as a virtual device in a logical sense, and when the current device role of Node1 is assumed to be a master device and the current device role of Node2 is assumed to be a slave device, that is, node1 in fig. 3 may be regarded as a second device in the embodiment, node2 may be regarded as a first device, and the DHD is a device with dual homing access to the MLAG. Of course, if Node1 in fig. 3 is the slave device in the MLAG and Node2 is the master device in the MLAG, node1 at this time can be regarded as the first device in the present embodiment, and Node2 can be regarded as the second device in the present embodiment.
When the Node2 standby role is changed into the same main equipment as the Node1, two main equipment exist simultaneously in the MLAG networking system at the moment, namely double main faults occur; the Node2 transmits the role check information to the Node1 through the DHD so as to restore the MLAG networking system to a normal state.
It should be understood that, since the first device and the second device generally perform data interaction through the Peer link, the keep alive link is used to detect whether a dual-master situation exists in the system, when the Peer link and the keep alive link are abnormal, the two devices cannot determine the role, and will become the dual-master abnormal environment, and when the Peer link and the keep alive link are abnormal, interaction can be performed between the two devices, and in this embodiment, the interaction of role information is performed through the communication link of the dual-master access device. In order to enable the dual homing access device to forward the role check information, step S101A may include the following specific embodiments:
S101A-1, acquiring role verification information.
S102A-2, the role verification information is encapsulated into a request message, wherein the request message comprises a forwarding identifier.
S102A-3, sending the request message to the dual homing access device, wherein a 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 forwarding identifier is carried in the request message sent by the first device to the dual-homing access device, so that after the dual-homing access device receives the request message, if the request message carries the forwarding identifier, the request message is forwarded to the second device.
It is further found that in the MLAG networking system, the LACP protocol is included in the communication protocol between the first device and the dual-homing access device, and the LACP protocol provides a reserved field for secondary expansion, where a part of the LACP protocol has the following structure:
based on the reserved field in the LACP, the above step S102A-2 may include adding a forwarding identifier to the request message in the following manner:
the first device may encapsulate the role check information into a request packet according to an LACP protocol, where a reserved field in the LACP protocol is marked as a forwarding identifier. Thus, compared with the construction of a new private protocol, the forwarding identifier is added on the basis of the LACP protocol, so that a new communication protocol between the first equipment and the dual-homing access equipment is not needed, and the complexity of the existing network system is prevented from being increased.
With continued reference to fig. 4, after step S101A, the MLAG dual master failure recovery method further includes:
S102A, receiving check response information sent by the second equipment according to the role check information through the dual-homing access equipment.
The method comprises the steps that a request message which is similar to a request message sent to a dual-homing access device by a first device is packaged, and a forwarding identifier is carried in a response message which encapsulates check response information, so that the dual-homing access device forwards the check response information to the first device; therefore, this will not be described in detail.
S103A, determining the equipment role which the equipment should take 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 dual-master failure, the first device determines, through interaction of dual-homing access devices, a device role that the first device should play in the MLAG networking system, so as to restore the MLAG networking system from the abnormal state of the dual-master failure to the normal state of the single master device as automatically as possible, in order to avoid that both the Peer-link and the keep-alive link are abnormal.
In order for the first device to determine the device role that the first device should perform 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 of the first device and the second device for carrying out primary device election, so that whether the first device is more suitable for functioning as the primary device can be determined by comparing the first election information and the second election information. Thus, 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 multiple status information. In some related technologies, the first device may further quantize various state information of itself and then calculate a first weighted value thereof; after quantizing the multiple state information of the second equipment, obtaining a second weighted value of the second equipment; and finally, taking the comparison result between the first weighted value and the second weighted value as a role election result.
However, it is found that this approach is a comprehensive factor for comparison, and when the Peer-link and the keep-alive link between the first device and the second device are frequently abnormal, this approach easily causes the role of the master device to be frequently switched between the first device and the second device. The research further finds 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, the second device is continuously used as the master device, and the first device is recovered to the slave device to perform double-master fault recovery, so that the network stability is better kept. In order to achieve the recovery effect, the two can be preferentially compared as the operation time of the main equipment; therefore, the present embodiment configures different priorities for the plurality of status information, respectively.
For example, the various status information includes a run time as a master, a system priority in the MLAG networking system, and a system MAC address; the priority order among the various state information is: the running time length of the main equipment is larger 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 skilled person may make appropriate adjustments as needed when implementing the present embodiment.
Thus, the comparison in step S103A-2 may include the following embodiments:
S103A-2-1, sequentially comparing the multiple state information of the second equipment with the multiple state information of the first equipment according to the configured priority order to obtain a first comparison result with difference;
S103A-2-2, taking the first comparison result with the difference as a role election result between the first device and the second device.
The exemplary description will be continued with information such as the operation time of the master device, the system priority in the MLAG networking system, and the system MAC address. That is, in this example, the plurality of status information of the second device includes:
the second device is used as the running time of 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 operation time of the first device as the 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 can 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 difference; then, the first difference comparison result is used as a role election result between the first device and the second device.
S103A-3, determining the equipment roles of the equipment matched with the role election result according to the role election result.
Wherein, when the role election result shows that the first device is more suitable as the main device than the second device, the current role of the device is kept unchanged; on the contrary, the second device is more suitable to be used as a master device, and at the moment, the first device restores the role of the device to 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 implementation of the present embodiment easier for the technician, the following describes in detail the interaction manner between the devices in the MLAG networking system with reference to fig. 5. The second device is assumed to be Node1 Node in the graph, the first device is assumed to be Node2 Node in the graph, and the dual-homing access device is assumed to be DHD device in the graph.
In order to facilitate distinguishing common LACP messages, a reserved field in the LACP protocol message is named as MLAG-LACP, and a message with the MLAG-LACP field marked as 1 is called as MLAG-LACP message, wherein 1 is a forwarding identifier; the MLAG-LACP message comprises an MLAG-LACP request message carrying role verification information and an MLAG-LACP response message carrying role response information. Whereas in the normal LACP message, the MLAG-LACP field is always marked as 0.
Only when the Peer-link and keep exception cause the MLAG networking system to be in the double-main fault abnormal state, the Node2 Node and the Node1 Node can send out the message with the MLAG-LACP field marked as 1.
The DHD device processes the LACP messages differently through the marks of the MLAG-LACP. Namely, after the DHD receives the MLAG-LACP request message or the MLAG-LACP response message, the DHD sends the MLAG-LACP request message or the MLAG-LACP response message from another root port, and the common LACP message is not subjected to forwarding processing, so that the receiving and transmitting of the common LACP message are not influenced.
After Node1 Node receives Node2 Node and sends character check information in MLAG-LACP request message, node1 Node responds to the character check information and sends check response information to Node2 Node. The Node2 Node sequentially compares the operation time of the Node1 Node serving as the main equipment in the response information, the system priority of the Node1 Node in the MLAG networking system and the system MAC address of the Node1 Node according to the following priority order and judgment principle:
1. As the operation duration of the master device, the longer the time is, the more suitable as the master device is;
2. the smaller the system priority in the MLAG networking system, the more suitable the value is as the master device;
3. the smaller the system MAC address, the more suitable the value is as master;
the Node2 compares the running time of the Node1 with the running time of the Node1, if the Node1 is larger than the Node2, the Node1 should actually act as the device role of the master in the MLAG networking system, and the Node2 should actually act as the device role of the slave. Conversely, node1 should actually assume the slave role in the MLAG networking system, while Node2 should actually assume the master role.
If the operation time length of the Node1 and the Node2 serving as the main equipment is equal, the Node1 Node 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 it is determined that Node2 should take on the role of the device in the MLAG networking system.
Similarly, for Node1, after Node1 receives the role check information sent by Node2, the same determination manner as that of Node2 is performed to determine the device role that Node1 should play in the MLAG networking system, so this embodiment will not be described in detail.
Therefore, in the above example, when the Node1 detects that the MLAG networking system is abnormal, the Node2 sends the role check information through the DHD device, and sequentially compares the multiple state information in the role check information sent by the Node2 with the multiple state information of the Node2 according to the preconfigured priority, and uses the comparison of the first difference as the role election result to determine the device role that the Node should take in the MLAG networking system, so as to automatically recover from the abnormal state of the double-master fault to the normal state of the single master device as much as possible.
From the above embodiments, it can be seen that the MLAG networking system automatically recovers from an abnormal state of a dual-master fault to a normal state of a single master device, and a device requiring dual-master access forwards information between a first device and a second device; therefore, the embodiment also provides an MLAG double-master fault recovery method applied to the double-homing access equipment in the 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 in conjunction with fig. 6, as shown in fig. 6, the method comprising:
S101B, after the first device detects that the MLAG networking system has double-master faults, role verification information sent by the first device is received.
Wherein the dual master failure indicates that the device role of the first device is changed from a slave device to the same master device as the second device.
S102B, forwarding the role verification information to the second device.
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 check response information.
And S104B, forwarding the verification response information to the first device.
The role verification information is encapsulated in the request message, so in an optional implementation manner, if the request message carries a forwarding identifier, the dual-homing access device forwards the role verification information to the second device.
For the request message, since the communication protocol between the first device and the dual homing access device includes the LACP protocol, and the protocol includes a reserved field that can be secondarily extended; therefore, the request message may be encapsulated based on the LACP protocol, and in the corresponding specific embodiment:
and if the reserved field of the LACP protocol in the request message is marked as a forwarding identifier, forwarding the role checking information to the second device by the dual-homing access device. Thus, the existing communication protocol is fully utilized, and the complexity of the existing network system is prevented from being increased.
In summary, the present embodiment also 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 compose an MLAG.
And when the first device detects that the MLAG networking system has a double-master fault, sending role verification information to the double-master accessed device, wherein the double-master fault indicates that the device role of the first device is changed from the slave device to the same master device as the second device.
And forwarding the role verification information to the second device by the dual homing access device.
And the second equipment sends check response information to the dual-homing access equipment according to the role check information.
And the dual homing access device forwards the verification response information to the first device.
And the first device determines the device role which the first device should take in the MLAG networking system according to the verification 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, the present embodiment further provides an MLAG dual-master failure recovery apparatus applied to the first device as a slave device in the MLAG networking system, where the MLAG networking system further includes a second device that composes an MLAG with the first device and a dual-homing access device.
It should be understood that the MLAG dual master fault resilient means includes at least one software functional module which may be stored in a memory in the form of software or cured 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, a software function module and a computer program included in the MLAG dual master fault recovery apparatus. Referring to fig. 7, functionally divided, the MLAG dual master failure recovery apparatus may include:
and the information transceiver module 101 is configured to send role verification information to the second device by using a dual-homing device in the MLAG networking system when the first device detects that the dual-homing device has a dual-master failure in the MLAG networking system, where the dual-master failure indicates that a device role of the first device becomes the same master device as that of the second device.
The information transceiver module 101 is further configured to receive, by using the dual-homing access 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 a 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 check response information, a device role that the first device should play in the MLAG networking system.
In the present embodiment, the role verification module 102 is used to implement step S103A in fig. 4, and for a detailed description of the role verification module 102, reference may be made to the detailed description of S103A.
In addition, 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 above information transceiver module 101 and the role checking module 102 may also be used to implement other steps or sub-steps of the MLAG dual-master failure recovery method, which will not be described in detail in this embodiment.
Based on the same inventive concept as the MLAG dual-master fault recovery method for dual-homing access devices in an MLAG networking system, this embodiment also provides an MLAG dual-master fault recovery apparatus applied to dual-homing access devices in an MLAG networking system. The MLAG networking system further comprises a first device and a second device which form the MLAG.
It should be understood that the MLAG dual master fault resilient means also includes at least one software functional module which may be stored in a memory in the form of software or cured 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, a software function module and a computer program included in the MLAG dual master fault recovery apparatus. Referring to fig. 8, functionally divided, the MLAG dual master failure recovery apparatus may include:
The information receiving module 201 is configured to receive role verification information sent by a first device after the first device detects that a dual-master failure occurs in an 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 a second device.
In the present embodiment, the information receiving module 201 is used to implement step S101B in fig. 6, and a detailed description of the information receiving module 201 may be referred to as a detailed description of step S101B.
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 used to implement step S102B in fig. 6, and for a detailed description of the information forwarding module 202, reference may be made to the detailed description of step S102B.
The information receiving module is also used for receiving the check response information.
In the present embodiment, the information receiving module 201 is used to implement step S103B in fig. 6, and a detailed description of the information receiving module 201 can be found in the 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 used to implement step S104B in fig. 6, and for a detailed description of the information forwarding module 202, reference may be made to the detailed description of step S104B.
It should also be noted that, since the MLAG dual-master fault recovery apparatus applied to the dual-homing access device in the MLAG networking system and the MLAG dual-master fault recovery method applied to the dual-homing access device in the MLAG networking system have the same inventive concept, the above 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 fault recovery method, which are not described in detail in this embodiment.
In addition, functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
It should also be appreciated 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 on a computer readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application.
Accordingly, the present embodiment also provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the MLAG dual master fault recovery method applied to the first device or the dual homing access device provided in the present embodiment. The computer readable storage medium may be any of various media capable of storing a program code, such as a usb (universal serial bus), a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk.
As shown in fig. 9, the present 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 embodiment, 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 embodiment in the memory 320.
When the communication device is the dual homing access device in the above embodiment, the processor implements the MLAG dual master fault recovery method applied to the dual homing access device provided in the present embodiment by reading and executing the computer program corresponding to the above embodiment in the memory 320.
With continued reference to fig. 9, the communication device further includes a communication unit. The memory 320, the processor 330 and the communication unit 340 in the communication device are electrically connected directly or indirectly to each other to realize 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, etc. In some embodiments, the memory 320 may be, but is not limited to, volatile memory, non-volatile memory, storage drives, and the like.
Therein, by way of example only, the volatile memory may be random access memory (Random Access Memory, RAM). The nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (Programmable Read-Only Memory, PROM), erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), flash Memory, or the like; the storage drive may be a magnetic disk drive, a solid state disk, any type of storage disk (e.g., optical disk, DVD, etc.), or a similar storage medium, or a combination thereof, etc.
The communication unit 340 is used for transmitting and receiving 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 (Local Area Network, LAN), a wide area network (Wide Area Network, WAN), a wireless local area network (Wireless Local Area Networks, WLAN), a metropolitan area network (Metropolitan Area Network, MAN), a wide area network (Wide Area Network, WAN), a public switched telephone network (Public Switched Telephone Network, PSTN), a bluetooth network, a ZigBee network, a near field communication (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). By way of example only, the processors may include a central processing unit (Central Processing Unit, CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a special instruction set Processor (Application Specific Instruction-set Processor, ASIP), a graphics processing unit (Graphics Processing Unit, GPU), a physical processing unit (Physics Processing Unit, PPU), a digital signal Processor (Digital Signal Processor, DSP), a field programmable gate array (Field Programmable Gate Array, FPGA), a programmable logic device (Programmable Logic Device, PLD), a controller, a microcontroller unit, a reduced instruction set computer (Reduced Instruction Set Computing, RISC), 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 manners. The apparatus embodiments described above are merely illustrative, for example, of the flowcharts and block diagrams in the figures that 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 merely illustrative of 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 think about variations or substitutions within the scope of the present application, and the application is intended to be covered by 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 (12)
1. The utility model provides a two owner fault recovery method of MLAG, characterized by that, is applied to the first equipment as slave device in MLAG networking system, MLAG networking system still includes the second equipment and the equipment that two return access of constituteing MLAG with first equipment, said method includes:
when detecting that the MLAG networking system has double main faults due to faults of two lines of a Peer-link and a Keepative, sending role verification information to the second device through the double-homing access device so as to enable the double-homing access device to forward the role verification information to the second device, wherein the double main faults indicate that the device role of the device is changed into the same main device as that of the second device;
receiving check response information sent by the second equipment according to the role check information through the dual-homing access equipment;
Comparing second election information in the verification response information with first election information of the first equipment to determine equipment roles of the equipment in the MLAG networking system, wherein the first election information and the second election information respectively represent information of the first equipment and the second equipment for carrying out main equipment election.
2. The MLAG dual master failure recovery method according to claim 1, wherein the transmitting role check information to the second device by the dual homing access device comprises:
acquiring the role verification information;
encapsulating the role verification information into a request message, wherein the request message comprises a forwarding identifier;
and sending the request message 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.
3. The MLAG dual master failure recovery method according to claim 2, wherein the communication protocol between the first device and the dual homing access device comprises LACP protocol, and the encapsulating the role check information into a request message comprises:
And according to an LACP protocol, the role verification information is encapsulated 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 said comparing the second election information in the check response information with the first election information of the first device, determining a device role of the device in the MLAG networking system, comprises:
comparing the first election information with the second election information to obtain a role election result between the first equipment and the second equipment;
and determining the equipment roles of the equipment matched with the role election result according to the role election result.
5. The MLAG dual master failure recovery method according to claim 4, wherein the first election information and the second election information respectively comprise a plurality of status information, and the plurality of status information are respectively configured with different priorities; comparing the first election information with the second election information to obtain a role election result between the first device and the second device, including:
Sequentially comparing the multiple state information of the second equipment with the multiple state information of the first equipment according to the priority order to obtain a first comparison result with difference;
and taking the comparison result of the first difference as a role election result between the first device and the second device.
6. The MLAG dual master failure recovery method according to claim 5, wherein the plurality of status information includes a run time as a master, a system priority in the MLAG networking system, and a system MAC address;
the priority sequence among the plurality of state information is as follows:
the operation time length of the master 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.
7. The utility model provides a two main fault recovery methods of MLAG, characterized by that is applied to the equipment of two return accesses in MLAG networking system, MLAG networking system still includes first equipment and the second equipment that constitutes MLAG, and the method includes:
receiving role verification information sent by the first device after the first device detects that a double-master fault occurs in the MLAG networking system due to the faults of two lines, namely a Peer-link line and a Keepative line, wherein the double-master fault indicates that the role of the first device is changed from a slave device to a master device identical to 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 device so that the first device compares second election information in the verification response information with first election information of the first device to determine a device role which the device should take in the MLAG networking system, wherein the first election information and the second election information respectively represent information of the first device and the second device for carrying out primary device election.
8. The MLAG dual master failure recovery method according to claim 7, wherein the role check information is encapsulated in a request message, forwarding the role check information to the second device, comprising:
and if the request message carries a forwarding identifier, forwarding the role verification information to the second equipment.
9. The MLAG dual master failure recovery method according to claim 8, wherein the request message is encapsulated based on LACP protocol, and if the request message carries a forwarding identifier, forwarding the role check information to the second device comprises:
And if the reserved field of the LACP protocol in the request message is marked as the forwarding identifier, forwarding the role verification information to the second device.
10. An MLAG networking system is characterized by comprising a double-homing access device, a first device and a second device which form the MLAG;
when the first device detects that the MLAG networking system has double main faults due to faults of two lines of Peer-link and Keepative, role verification information is sent to the double-homing access device so that the double-homing access device forwards the role verification information to the second device, wherein the double main faults indicate that the role of the first device is changed from slave device to the same master device as that of the second device;
the dual-homing access device forwards the role verification information to the second device;
the second equipment sends verification response information to the dual-homing access equipment according to the role verification information;
the dual-homing access device forwards the verification response information to the first device;
and comparing second election information in the verification response information with first election information of the first equipment by the first equipment to determine an equipment role which the equipment should take in the MLAG networking system, wherein the first election information and the second election information respectively represent information of the first equipment and the second equipment for carrying out main equipment election.
11. An MLAG dual-master fault recovery apparatus, 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 that forms an MLAG with the first device, and a dual-homing access device, the apparatus comprising:
the information receiving and transmitting module is used for sending role verification information to the second device through the dual-homing access device when the first device detects that the MLAG networking system has a dual-master fault due to the faults of two lines of a Peer-link and a keep-alive, so that the dual-homing access device forwards the role verification information to the second device, wherein the dual-master fault indicates that the role of the first device is changed into the same master device as that of the second device;
the information receiving and transmitting module is further used for receiving verification response information sent by the second device according to the role verification information through the dual-homing access device;
and the role verification module is used for comparing second election information in the verification response information with first election information of the first equipment to determine the equipment role which the equipment should take in the MLAG networking system, wherein the first election information and the second election information respectively represent the information of the first equipment and the second equipment for carrying out main equipment election.
12. An MLAG dual master fault resilient apparatus, characterized by a dual homing access device for use in an MLAG networking system, the MLAG networking system further comprising a first device and a second device that make up an MLAG, the apparatus comprising:
the information receiving module is used for receiving role verification information sent by the first device after detecting that a double-master fault occurs in the MLAG networking system due to the fact that two lines of Peer-link and keep-alive are faulty, wherein the double-master fault indicates that the device role of the first device is changed from slave device to master device identical to that of the second device;
the information forwarding module is used for forwarding the role verification information to the second device, and 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, so that the first device compares second election information in the verification response information with first election information of the first device, and determines a device role that the device should play in the MLAG networking system, where the first election information and the second election information respectively characterize information that is used by the first device and the second device to perform primary device election.
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