CN115514699A - Cross-device link communication method, switch, system and storage medium - Google Patents

Cross-device link communication method, switch, system and storage medium Download PDF

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Publication number
CN115514699A
CN115514699A CN202110691676.XA CN202110691676A CN115514699A CN 115514699 A CN115514699 A CN 115514699A CN 202110691676 A CN202110691676 A CN 202110691676A CN 115514699 A CN115514699 A CN 115514699A
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node
link
hanging
switch
uplink
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林宁
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ZTE Corp
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ZTE Corp
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Priority to CN202110691676.XA priority Critical patent/CN115514699A/en
Priority to PCT/CN2022/099907 priority patent/WO2022268036A1/en
Publication of CN115514699A publication Critical patent/CN115514699A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/24—Multipath
    • H04L45/245—Link aggregation, e.g. trunking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/24—Multipath
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The application discloses a cross-device link communication method, a switch, a system and a storage medium. According to the method and the device, when the peer-link fails, the double-active node and the single-hanging node of the first device are separated, communication of the double-active node of the link can be kept cut off, the physical state of the link port can be kept normal, and a VLAN interface of the single-hanging node of the link can continue to keep normal communication. Therefore, the scheme provided by the embodiment of the application can improve the reliability and maintainability of the network and improve the stability of the whole network.

Description

Cross-device link communication method, switch, system and storage medium
Technical Field
The present application relates to, but not limited to, the field of communication technologies, and in particular, to a method, a switch, a system, and a storage medium for cross-device link communication.
Background
An MLAG (multi-chassis link aggregation group) is a mechanism for implementing inter-device link aggregation, and by performing inter-device link aggregation on one device and another two devices, the link reliability is improved from a single board level to a device level, so as to form a dual active system. In MLGA switch systems, the primary device and the standby device are typically connected by a direct-link aggregation (peer-link) link. In the related art, when a peer-link fails, the standby device backs off to actively break the links upstream and downstream, and exits from the whole cross-device link aggregation switch system, that is, the whole system only stores the main device in operation. If the main device also fails, the whole network is completely abnormal at the system node of the cross-device link aggregation switch, and all messages passing through the node cannot be forwarded.
Disclosure of Invention
The embodiment of the application provides a cross-device link communication method, a switch, a system and a storage medium, which can ensure that a single-hanging node on standby equipment keeps normal communication when a peer-link fails or is abnormal.
In a first aspect, an embodiment of the present application provides a communication method across device links, which is applied to a first communication device, and the method includes:
the first equipment acquires the fault information of the peer-link or senses the fault abnormality of the peer-link;
the first equipment comprises a double-active node and a single-hanging node, and the first equipment identifies the downlink single-hanging node and keeps the path of the downlink single-hanging node smooth, namely the downlink single-hanging node can normally communicate or work;
the first equipment closes a physical port of a downlink dual-active node, namely the downlink dual-active node cannot work normally;
the first device keeps a Virtual Local Area Network (VLAN) VLAN interface access of an uplink single-hanging node unblocked, namely the VLAN interface of the uplink single-hanging node can work normally; the physical state of the port corresponding to the virtual local area network interface of the uplink single-hanging node is kept normal, that is, the port is not closed.
And the first equipment closes the VLAN interface of the uplink dual-active node, namely the VLAN interface of the uplink dual-active node cannot work normally.
In a second aspect, an embodiment of the present application further provides a communication method across device links, which is applied to a first communication device and a second communication device, and the method includes that the method includes
The first equipment and the second equipment are in communication connection through a peer-link;
the first equipment acquires peer-link fault information;
the first equipment keeps a downlink single-hanging node path smooth, and closes a physical port of a downlink double-active node; namely, the first device downlink single-hanging node can work normally, and the first device downlink double-active node can not work normally;
the first equipment keeps the VLAN interface access of the uplink single hanging node unblocked, and the first equipment closes the VLAN interface of the uplink double active node; namely, the VLAN interface of the uplink single-hanging node of the first device can communicate normally, and the VLAN interface of the uplink double-active node of the first device cannot work normally;
in a third aspect, an embodiment of the present application further provides a switch, including: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the communication method according to the first aspect when executing the program.
In a fourth aspect, an embodiment of the present application further provides a cross-device link aggregation system, including: memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the communication method according to the second aspect when executing the program.
In a fifth aspect, the present invention further provides a computer-readable storage medium storing computer-executable instructions for performing the communication method according to the third aspect or the communication method according to the fourth aspect.
According to the embodiment of the application, when the peer-link fails, the double-active node and the single-hanging node of the first device are separated, so that the communication of the double-active node of the link can be kept cut off, and the physical state of the link port can be kept normal, so that the VLAN interface of the single-hanging node of the link can be kept in normal communication continuously. Therefore, the scheme provided by the embodiment of the application can improve the reliability and maintainability of the network and improve the stability of the whole network.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
FIG. 1 is a schematic diagram of a cross device link aggregation switch system framework;
FIG. 2 is a schematic diagram of a cross device link aggregation switch system framework according to an embodiment of the present application;
FIG. 3 is a flow chart of a method of communication across a device link according to an embodiment of the present application;
FIG. 4 is a flow chart of a method of communication across a device link according to another embodiment of the present application;
FIG. 5 is a flow chart of a method of communication across a device link according to another embodiment of the present application;
FIG. 6 is a flow chart of a method of communication across a device link according to another embodiment of the present application;
fig. 7 is a schematic diagram of a switch system framework according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Further to the description in connection with fig. 2, while a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different than in the flowchart. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The first mobile communication device obtains target channel information serving as input data of a positioning model by obtaining first channel information, then obtaining third channel information from the first channel information, and then carrying out normalization processing on the third channel information. The target channel information obtained according to the first channel information can be used as input data of the positioning model, so that the input data required by the positioning model can be effectively acquired, and the positioning model can perform positioning processing according to the target channel information.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
MCLAG is a mechanism to implement cross-device link aggregation. In the cross-device link aggregation switch system, the device performing link aggregation may be not only a switch but also other network devices such as a router. The embodiment of the present application will be described by taking a switch as an example, but those skilled in the art know that the protocol calculation method involved in the present application is also applicable to a cross-device link aggregation system formed by other network devices.
To meet communication needs, a cross-device link aggregation switch system may include multiple types of nodes, such as dual active nodes and single hanging nodes. In general, a main device and a standby device in a cross-device link aggregation switch system are connected through a peer-link. When the peer-link fails, in order to ensure that the system node works normally, the standby device performs a back-off operation, such as cutting off the upstream and downstream links, and exiting from the whole system. In other words, even if the standby device can normally operate, the standby device will not participate in the system communication operation due to back-off.
The related art will be further explained with reference to fig. 1.
Fig. 1 is a schematic diagram of a cross device link aggregation switch system framework. As shown in fig. 1, a server C2, a switch a, a switch B, and a gateway G form a set of dual active cross-device link aggregation switch system. Assume that switch a is the master and switch B is the slave. The port A1 of the switch A and the port B1 of the switch B are connected with the server C1; the port A2 of the switch A and the port B2 of the switch B are respectively connected with the port G1 and the port G2 of the gateway G. Switch B port B3 is connected to server C2.
When the peer-link between the switch A and the switch B fails, the switch B cuts off the upstream link and the downstream link. Specifically, switch B port B2 uplink communications are cut off, and switch B port B1 downlink communications are cut off. At this point, switch B will exit completely and no longer participate in any operation of the system. The communication of the system from the gateway G to the server C1 is handled by a. Meanwhile, the gateway G and the server C2 cannot transmit messages or messages any more, even if the switch B device is able to operate normally.
Based on this, the embodiment of the application provides a communication method of a cross-device link, so that when a peer-link fails, standby devices can still work normally, and thus the reliability, maintainability and stability of a network are improved.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 2 is a schematic diagram of a cross device link aggregation switch system framework according to an embodiment of the present application. As shown in fig. 2, a dual active node server C1, a single hanging node server C2, a switch a, a switch B, and a gateway G form a set of dual active cross-device link aggregation switch system. Switch a is the master and switch B is the slave. The port A1 of the switch A and the port B1 of the switch B are connected with a dual active node server C1; the port A2 of the switch A and the port B2 of the switch B are respectively connected with the port G1 and the port G2 of the gateway G. The port B3 of the switch B is connected with the single-hanging node server C2.
When the peer-link between the switches a and B fails, the switch B turns off the dual active node port B1 (indicated by a dotted line between B1 and C1 in fig. 2) after sensing the peer-link, and simultaneously maintains the normal state of the single hanging node port B3 (indicated by a solid line between B3 and C2 in fig. 2). At this time, the switch B and the dual active node server C1 can no longer communicate through the dual active node port B1; switch B and single drop node server C2 maintain communication through single drop node port B3.
Switch B separates the VLAN of the suspended node from the VLAN of the live node in the live node port B2. The VLAN interface of the suspended node in port B2 is then left in the normal state (indicated by the solid line between B2 and C2 in fig. 2), while the VLAN interface of the dual active node is turned off (indicated by the dashed line between B2 and C2 in fig. 2). At this time, although the switch B can no longer communicate with the gateway G through the VLAN interface of the dual active node in the port B2, the switch B can still communicate with the gateway G through the VLAN interface of the single hanging node in the port B2.
The gateway G removes the port G2 from the original link aggregation group (the second link aggregation group), establishes a new link aggregation group (the first link aggregation group) and adds the port G2; at this time, the first link aggregation group includes VLANs communicating with the switch B and the single hanging server C2, and maintains normal communication from the gateway G node to the switch B and the single hanging server C2.
According to the method and the device, on the premise that the composition of a cross-device link aggregation switch system is not changed, when a peer-link failure occurs, the switch B can still be kept to participate in the node to work. Not only can the reliability and maintainability of network be promoted, but also the stability of whole network is further promoted simultaneously.
FIG. 3 is a flow diagram of a method of communication across a device link according to one embodiment of the present application; as shown in fig. 3, the method of communication across a device link includes at least:
step S100: and acquiring the fault information of the peer-link.
As further described in conjunction with fig. 2, switch a and switch B are connected via a peer-link, and when the peer-link fails or is abnormal, switch a and switch B sense the abnormality.
Step S200: and the downlink single-hanging node keeps the smooth passage of the downlink single-hanging node.
Further described with reference to fig. 2, when the switch B senses peer-link abnormality, the communication connection between the switch B and the single drop node server C2 is maintained, that is, a message or a message may be transmitted through the single drop node port B3 of the switch B.
Step S300: and closing the physical port of the downlink dual active node.
Further described with reference to fig. 2, when the switch B senses peer-link abnormality, the communication connection between the switch B and the dual active node server C1 is disconnected, that is, the message or the message cannot be transmitted through the dual active node port B1 of the switch B.
Step S400: and keeping the VLAN interface access of the uplink single-hanging node smooth.
Further described with reference to fig. 2, after the switch B senses the peer-link abnormality, the VLAN interface communication connection of the single-hanging node in the dual-active node port B2 is maintained, that is, the packet or the message may be transmitted through the VLAN interface of the single-hanging node.
Step S500: and closing the VLAN interface of the uplink dual-active node.
Further described with reference to fig. 2, when the switch B senses peer-link abnormality, the VLAN interface communication connection of the dual active node in the dual active node port B2 is disconnected, that is, the packet or the message cannot be transmitted through the VLAN interface of the dual active node.
Fig. 4 is a flowchart of a communication method across device links according to an embodiment of the present application, which is different from the previous embodiment in that a message is sent to an upstream aggregation node before a VLAN interface of an uplink dual active node is closed; as shown in fig. 4, the method of communication across a device link includes at least:
step S100: and acquiring the fault information of the peer-link.
Step S200: and the downlink single-hanging node keeps the smooth passage of the downlink single-hanging node.
Step S300: and closing the physical port of the downlink dual active node.
Step S400: and keeping the VLAN interface access of the uplink single-hanging node smooth.
Step S410: and sending a backoff message to the upstream aggregation node.
As further described in connection with fig. 2, before the VLAN interface of the dual active node is closed, the gateway G needs to be notified to cut off the VLAN communication with the dual active node of the switch B. Therefore, before closing the VLAN interface of the dual active node in the dual active node port B2, a message or a message needs to be sent first to notify the gateway G and the link of the switch B to perform corresponding processing.
Step S500: and closing the VLAN interface of the uplink dual-active node.
FIG. 5 is a flowchart of a communication method across device links according to an embodiment of the present application, which is different from the previous embodiment in that a VLAN of an uplink single-hanging node and a VLAN of a dual active node are identified and separated; as shown in fig. 5, the method of communication across a device link includes at least:
step S100: and acquiring the fault information of the peer-link.
Step S200: and the downlink single-hanging node keeps the smooth passage of the downlink single-hanging node.
Step S300: and closing the physical port of the downlink dual active node.
Step S310: the VLAN of the uplink single-hanging node is separated from the VLAN of the uplink double-active node.
As further described in conjunction with fig. 2, in order to prevent the switch B from completely exiting from operation, before back-off, the VLAN of the single-hanging node in the dual-active node port B2 needs to be separated from the VLAN of the dual-active node, and then the VLAN of the dual-active node needs to be processed separately. By the mode, the problem that when a peer-link fails, the switch B completely pushes out the system, and resource waste is caused can be avoided. Meanwhile, the related business work of the single hanging node can be continuously carried out, and the network reliability is further improved.
Step S400: and keeping the VLAN interface access of the uplink single-hanging node smooth.
Step S410: and sending a back-off message to the upstream aggregation node.
Step S500: and closing the VLAN interface of the uplink dual-active node.
Fig. 6 is a flowchart of a communication method across device links according to an embodiment of the present application, which is different from the previous embodiment in that after a device backs off, its upstream sink node reassembles links according to a received message to ensure that the system operates normally; as shown in fig. 6, the communication method across the device link at least comprises:
step S100: and acquiring the fault information of the peer-link.
Step S200: and the downlink single-hanging node keeps the smooth passage of the downlink single-hanging node.
Step S300: and closing the physical port of the downlink dual active node.
Step S310: the VLAN of the uplink single-hanging node is separated from the VLAN of the uplink double-active node.
Step S400: and keeping the VLAN interface access of the uplink single-hanging node smooth.
Step S410: and sending a back-off message to the upstream aggregation node.
Step S500: and closing the VLAN interface of the uplink dual-active node.
Step S600: the upstream sink nodes form a first link aggregation group.
As further described in connection with fig. 2, after receiving the back-off message, the gateway G removes the link linked to the switch B from the original link aggregation group, and then re-establishes a new link aggregation group. The new link aggregation group is added to the communication VLAN with the single-hanging node, i.e. at least including the VLAN communicating with switch B and single-hanging server C2.
By the method, normal communication from the gateway G node to the switch B and the single-hanging node server C2 can be kept when the peer-link fails. Avoiding switch B from completely exiting the system node operation.
It should be noted that, in the further description of the foregoing embodiment, the devices such as the switch, the gateway, and the server are only used for exemplary illustration, and the technical solution of the present application is not limited to be only applied to the above devices. The embodiment of the application is applicable to all communication devices capable of realizing the communication method.
Fig. 7 is a system for cross-device link aggregation according to an embodiment of the present application, including: the system comprises a switch A and a switch B, wherein the switch A and the switch B are connected through a peer-link. The switch A is a main device and comprises an uplink port A2 and a downlink port A1; the switch B is a standby device, and includes an uplink port B2, a downlink port B1, and a single-hanging node port B3.
When the peer-link fails, the switch B senses the link abnormality, closes the downlink port B1, does not forward messages or messages through the port any more, and keeps the single-hanging node port B3 in a state of forwarding the messages or messages normally. Meanwhile, the VLAN of the single hanging node of the uplink port B2 is separated from the VLAN of the double active node, and the VLAN interface of the double active node is closed.
By adopting the scheme of the embodiment, the problem that when the peer-link fault standby equipment retreats, the single hanging node on the standby equipment is immediately interrupted in communication can be avoided, the reliability and maintainability of the network are greatly improved, and the stability of the whole network is improved.
An embodiment of the present application also provides a computer-readable storage medium storing computer-executable instructions for performing the communication method of the above-described embodiment.
The memory, as a non-transitory computer-readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer-executable programs. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and these remote memories may be connected to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The above described embodiments of the mobile communication device are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims.

Claims (10)

1. A method of communication across a device link, applied to a first communication device, the method comprising:
acquiring failure information of a direct connection aggregation (peer-link) link;
identifying a downlink single-hanging node, and keeping a path of the downlink single-hanging node smooth;
closing a physical port of a downlink dual active node;
keeping the Virtual Local Area Network (VLAN) interface access of the uplink single-hanging node smooth;
and closing the virtual local area network interface of the uplink dual-active node.
2. The method of claim 1, wherein before the closing the vlan of the uplink dual active node, further comprising:
and sending a backoff message to the upstream aggregation node.
3. The method according to claim 1 or 2, wherein before keeping the virtual local area network interface path of the uplink single-hanging node clear, further comprising:
and separating the virtual local area network of the uplink single hanging node from the virtual local area network of the uplink double active node.
4. The method of claim 1 or 2, wherein the keeping open a Virtual Local Area Network (VLAN) interface path for an uplink single-hanging node, further comprises: and the physical state of a port corresponding to the virtual local area network interface of the uplink single-hanging node is not closed.
5. The method of claim 4, further comprising:
the upstream aggregation node forms a first link aggregation group, and the first link aggregation group comprises the virtual local area network interface of the single-hanging node and the downlink single-hanging node.
6. A communication method across device links is applied to a first communication device and a second communication device and comprises the steps of
The first device and the second device are connected by a direct connection aggregation link;
the first equipment acquires fault information of a direct connection aggregation link;
the first equipment keeps a downlink single-hanging node path smooth, and closes a physical port of a downlink double-active node;
the first equipment sends a backoff message to an upstream aggregation node;
and the first equipment keeps the smooth passage of the virtual local area network interface of the uplink single-hanging node, and closes the virtual local area network interface of the uplink double-active node.
7. The method of claim 6, further comprising:
data of the double-active node is transmitted and received through the second equipment;
and the data of the single-hanging node of the first equipment is received and transmitted by the first equipment.
8. A switch, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the communication method according to any of claims 1 to 5 when executing the program.
9. A cross device link aggregation system, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the communication method according to any of claims 6 to 7 when executing the program.
10. A computer-readable storage medium storing computer-executable instructions for performing the communication method of any one of claims 1 to 7.
CN202110691676.XA 2021-06-22 2021-06-22 Cross-device link communication method, switch, system and storage medium Pending CN115514699A (en)

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US9166868B2 (en) * 2011-12-07 2015-10-20 Fujitsu Limited Distributed control plane for link aggregation
CN108696416A (en) * 2017-04-12 2018-10-23 中兴通讯股份有限公司 A kind of VXLAN is mono- to return and dual homed hybrid access method, device and PE equipment
CN112769587B (en) * 2019-11-05 2024-05-14 中兴通讯股份有限公司 Forwarding method, equipment and storage medium for access traffic of dual homing device
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