WO2009030170A1 - Système de gestion de défaut de liaison, procédé et dispositif de détection de défaut de liaison et gestion - Google Patents

Système de gestion de défaut de liaison, procédé et dispositif de détection de défaut de liaison et gestion Download PDF

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Publication number
WO2009030170A1
WO2009030170A1 PCT/CN2008/072210 CN2008072210W WO2009030170A1 WO 2009030170 A1 WO2009030170 A1 WO 2009030170A1 CN 2008072210 W CN2008072210 W CN 2008072210W WO 2009030170 A1 WO2009030170 A1 WO 2009030170A1
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WIPO (PCT)
Prior art keywords
link
data transmission
port
lacp
aggregation group
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Application number
PCT/CN2008/072210
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English (en)
Chinese (zh)
Inventor
Hechuan Wang
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009030170A1 publication Critical patent/WO2009030170A1/fr

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Classifications

    • 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
    • H04L41/0677—Localisation of faults

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a system for link fault handling, a link fault detection, a processing method, and a device.
  • LA technology is a method of bundling a group of physical ports together as a logical port to increase the bandwidth of data transmission.
  • the LA technology is also called a multi-port load balancing group, and the related protocol standards can refer to IEEE802.3ad.
  • LAG Link Aggregation Group
  • the Link Aggregation Control Protocol adopts this protocol.
  • the data communication product can automatically form an aggregation link according to its configuration and start the aggregation link to send and receive data. After the path is formed, the protocol can be used to monitor and control the running status of the link, and automatically adjust or dissolve the aggregation of the link when the aggregation condition changes.
  • the current telecom operators share bandwidth, reliability, and traffic, Requirements are maintained in terms of link state maintenance, etc. These requirements can all be implemented through the LACP protocol.
  • LACPDU Link Aggregation Control Protocol
  • the data unit is negotiated.
  • the LACPDU contains the information of the local device and the peer device.
  • the local device and the peer device negotiate the LACPDUs to generate or maintain the link aggregation group.
  • the data is transmitted through the link aggregation group member.
  • the local device and the peer device that perform communication are respectively named as the first device and the second device.
  • the first device in the LACPDU packet sent to the second device, carries the information of the first device itself and the information of the second device recorded on the first device, and the second device sends the information sent by the first device.
  • the information about the first device carried in the packet is consistent with the information of the first device that is saved by the device, and if the information is inconsistent, the first device that is the peer of the second device has changed.
  • the LACP trigger logic selects the state machine, and re-selects the corresponding port for the aggregation link group; If the second device checks that the information about the first device carried in the LACPDU is consistent with the information of the first device that is saved by itself, the device receives the timeout timer, so that the timeout period of the timer is the LACPDU packet sending period. An integer multiple (usually 3 times), and then the second device checks the information of the second device carried in the LACPDU packet with the second device itself. Whether the stored information is consistent.
  • the information about the peer device saved by the first device of the communication peer that is, the information of the second device is incorrect.
  • an LACPDU packet is sent to the first device to refresh.
  • the peer device information is saved on the device.
  • the second device continues to determine whether the LACPDU packet sent by the peer end is not received after the timeout timer expires. If yes, the second device is used.
  • the port is set to not selected to abort the use of this port for data transmission in the link aggregation group, and at the same time set the peer information to be unsynchronized.
  • the negotiation steps are as follows:
  • the ID includes the system priority and the system's MAC address.
  • the system priority is first compared. If the priorities are the same and then the system MAC address is compared, the device with the smaller device ID in the comparison result is compared. Think better.
  • the ID includes the port priority and port number. First, compare the port priorities. If the priority is the same, then compare the port number, and the maximum port number limit is met. Select the port with the smaller port number as the port of the link aggregation group, those A port with a larger port number is used as the unselected port.
  • the LACP periodically sends LACPDUs through both ends to perform port selection and state maintenance to implement data transmission.
  • the period is an optional period.
  • the fast period is 1 second
  • the slow period is 30 seconds.
  • the packet timeout time is 3 seconds and 90 seconds respectively, that is, only 3 seconds.
  • the LACP does not immediately send the LACPDU packet to notify the peer end of the update after receiving the timeout timer timeout notification, so that the peer end continues to send data to the local end, but needs to follow the LACPDU.
  • the sending period of the packet is sent to the LACPDU at a certain time. This will cause the LACPDU to be sent to the peer immediately after receiving the timeout notification. Instead, it will wait for a certain period of time.
  • the later the packet is sent the later the LACPDU is sent, and the later the processing is performed on the peer.
  • the link traffic is interrupted for a longer period of time, which further affects the quality of data transmission.
  • the embodiments of the present invention provide a system for link fault processing, a link fault detection method, a link fault processing method, a device, and a device, so that the link fault can be learned in real time and the data transmission is suspended, thereby ensuring Data transmission quality.
  • the embodiments of the present invention provide the following technical solutions:
  • a system for implementing link fault handling comprising: a communication device, an LACP protocol execution device, wherein:
  • the communication device is configured to: perform data transmission, and detect, in real time, whether a link fault occurs between respective ports of each member of the link aggregation group during data transmission, and when the link fault is detected, the link failure condition is Notifying the LACP executing device;
  • the LACP executing device is configured to: suspend a link failure member in the link aggregation group to perform data transmission according to a link failure condition sent by the communication device.
  • a communication device for implementing link fault handling comprising:
  • the link fault detecting unit is configured to detect, in real time, whether a link fault occurs between respective ports of each member of the link aggregation group during data transmission;
  • the fault condition reporting unit is configured to report the link fault condition to the LACP executing device when the link fault detecting unit detects that the link fault exists.
  • a LACP executing device for implementing link fault handling comprising:
  • the fault condition receiving unit is configured to receive, by the communication device, the link fault condition that is detected by the member in the link aggregation group;
  • a data transmission suspension unit configured to suspend data transmission of a member in the link aggregation group that has a link failure according to the link failure condition.
  • a link failure detection method comprising:
  • a link fault is detected between the ports of each member of the link aggregation group in real time.
  • the link failure condition is reported to the LACP actuator.
  • a link fault processing method comprising:
  • Data transmission is performed by a member that has a link failure in the link aggregation group according to the link failure condition.
  • a computer readable storage medium comprising computer program code, the computer program code being executed by a computer unit, such that the computer unit: During the data transmission process, a link fault is detected between the ports of each member of the link aggregation group in real time; the link fault condition is reported to the LACP executing device; or
  • the receiving communication device reports the link failure condition of the member in the link aggregation group, and stops the data transmission of the member in the link aggregation group that is in the link aggregation group according to the link failure condition.
  • FIG. 1 is a flowchart of a method for implementing link fault processing according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a scenario applied to a first embodiment of a method according to the present invention
  • FIG. 3 is a flowchart of a method for implementing link fault processing according to a second embodiment of the present invention
  • FIG. 4 is a flowchart of a method for implementing link fault processing according to a third embodiment of the present invention. The flow of the link failure detecting method provided in the fourth embodiment;
  • FIG. 6 is a flowchart of a link fault detection method according to a fifth embodiment of the present invention.
  • Figure 7 is a schematic illustration of a system provided in a sixth embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a communication device for implementing link fault processing according to an eighth embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of an LACP executing apparatus for implementing link fault processing according to an eighth embodiment of the present invention.
  • the link fault cannot be quickly detected, and the data transmission can be suspended only after the timeout has not received the packet, thereby causing the data transmission to be interrupted too long.
  • the link fault detection is initiated between the ports of the LA member. Once the link is found to be faulty, the LACP is notified immediately. The LACP sets the port corresponding to the faulty link to be unselected, so that data transmission is no longer performed through the link. In turn, the corresponding port on the communication device is immediately reconfigured to re-select the corresponding LA member for data transmission to ensure that the data transmission can be recovered in time.
  • FIG. 1 a flowchart of a method for implementing link fault processing according to a first embodiment of the present invention is implemented. The method includes the following steps:
  • Step 101 During the data transmission process, detect whether a link fault occurs between the respective ports of each member of the link aggregation group, and if yes, perform step 102; otherwise, return to step 101 until the data transmission ends;
  • Step 102 Notifying the LACP executing device of the link failure condition, the device suspending data transmission by the member in the link aggregation group where the link failure occurs.
  • a unidirectional link failure or a bidirectional link failure may occur between the communication devices.
  • the methods provided by the embodiments of the present invention are described in more detail below. It should be noted that the LACP executing apparatus in the embodiment of the present invention has the same functions and functions as the LACP protocol executing apparatus.
  • router 1 and router 2 perform data transmission as communication parties, and there are two pairs of bidirectional links between the two routers, namely bidirectional link 1 and bidirectional link 2, respectively, and the bidirectional link 1 and the bidirectional link Road 2 is a member of the link aggregation group between Router 1 and Router 2.
  • the ports on the router 1 of the bidirectional link 1 and the bidirectional link 2 are respectively named port P11 and port P12, and the bidirectional link is used.
  • the ports on the router 2 and the bidirectional link 2 are named port P21 and port P22, respectively.
  • Step 301 Perform data transmission between the router 1 and the router 2, and detect whether the link between the two routers is faulty in real time; if a fault occurs, go to step 302, otherwise, return to step 301 until data transmission End;
  • the link between the router 1 and the router 2 is implemented by starting the fast link failure detection protocol on each port of the router 1 and the router 2, that is, the ports P11, P21, P12, and P22.
  • Two-way fast link fault detection which can be IEEE fault detection protocols such as standards for connection fault management (such as 802.1ag) and fast bidirectional forward detection (BFD).
  • the link aggregation group includes only the bidirectional link 1 and the bidirectional link 2 in other embodiments of the present invention. In other embodiments of the present invention, the link aggregation is performed. Group may package Including more link members, in this case, link fault detection needs to be initiated on the port corresponding to each link member, thereby realizing real-time detection of link faults;
  • the unidirectional link in the bidirectional link 1 that sends data to the router 1 by the router 2 fails.
  • the router 1 detects the unidirectional in real time by using the detection mechanism as described above.
  • the link is faulty, and then step 302 is performed;
  • Step 302 Since, in step 301, the router 1 detects that a line in the bidirectional link 1 has failed in real time, in this step, the router 1 notifies the LACP executing device of the link failure condition;
  • the LACP executing device is a Select logical state machine in the LACP, and the state machine completes the subsequent steps.
  • other devices may also be used as the LACP executing device. The device can complete the operation of subsequently suspending data transmission without affecting the implementation of the present invention.
  • Step 303 The LACP executing device sets the P11 port on the router 1 to be unselected, so that the P11 port is no longer used for data transmission; and immediately, the LACPDU packet is sent to the router 2 through the P11 port of the router 1 to notify the router 2
  • the corresponding port setting is also performed.
  • setting the port to not selected means that the set port does not actually enter the link aggregation group, and does not perform data transmission through the port, but when the port is set When selected, the port is a member of the link aggregation group, and the port can be used for data transmission. Therefore, the port P11 of the router 1 is set to be unselected, so that the port is no longer used for data transmission;
  • Step 304 After receiving the LACPDU packet, the router 2 sets its own port P21 to be unselected, so that the port is no longer used for data transmission.
  • the bidirectional link 1 performs the purpose of data transmission.
  • the information of the peer device saved on the router 1, that is, the port P21 of the router 2 may be further set to be unsynchronized, thereby causing the link to be faulty.
  • the corresponding information of the peer device saved on the communication device is refreshed in time;
  • the peer device saved on the router 2, that is, the router 1 The information of the port P11 is set to be unsynchronized, so that the corresponding information of the peer device saved on the communication device is refreshed in time.
  • the method provided by implementing the third embodiment of the present invention includes the following steps:
  • Step 401 While performing data transmission between the router 1 and the router 2, detecting whether the link between the two routers is faulty in real time; if a failure occurs, executing step 402, otherwise, returning to step 401 until data transmission End;
  • both links in the bidirectional link 1 fail.
  • the router 1 and the router 2 respectively detect the corresponding chain in the bidirectional link 1 in real time.
  • the road fails, and then step 402 is performed;
  • Step 402 The router 1 and the router 2 respectively notify the LACP executing device of the link failure condition, and the LACP executing device may be the selected logical state machine described in the foregoing embodiment, or may be a similar device capable of realizing its function;
  • Step 403 The LACP executing device sets the P11 port on the router 1 to be unselected, so that the router 1 no longer uses the P11 port for data transmission; and, the LACP executing device sets the P21 port on the router 2 to be unselected, so that the router 2 The P21 port is no longer used for data transmission.
  • the LACP executing device sets the P11 port on the router 1 to be unselected, so that the router 1 no longer uses the P11 port for data transmission; and, the LACP executing device sets the P21 port on the router 2 to be unselected, so that the router 2 The P21 port is no longer used for data transmission.
  • the bidirectional link 1 is no longer in the link aggregation group, thereby achieving the purpose of suspending the data transmission using the bidirectional link 1.
  • the peer device saved on the router 1 may be further configured, that is, the router 2
  • the information of the port P21 is set to be unsynchronized; and/or, after the LACP executing device sets the P21 port on the router 2 to be unselected, the peer device saved on the router 2, that is, the router 1 can be further
  • the information of the port P11 is set to be unsynchronized, so that the corresponding information of the peer device saved on the communication device is refreshed in time in the event of a link failure.
  • the LACP is linked with the link fault detection protocol, and the link fault detection protocol detects that the link fault is currently present, and immediately or directly The notification is sent to LACP, so that LACP can immediately perform corresponding processing after the link fails, thereby reducing traffic interruption in data transmission and ensuring the quality of data transmission.
  • the fourth embodiment of the present invention further provides a link fault detection method, and a flowchart thereof is shown in FIG. 5, where the method includes:
  • Step 501 In the data transmission process, detecting, in real time, whether a link fault occurs between each port of each member of the link aggregation group;
  • Step 502 Report the link fault condition to the LACP executing device.
  • the specific implementation of the real-time detection of whether a link fault occurs between the respective ports of each member of the link aggregation group is: enabling fast bidirectional link fault detection between the respective ports of the respective members,
  • the LACP execution device is a selection logic state machine in the LACP, but is not used as a specific implementation process for limiting the link failure detection method. For details, refer to the corresponding processing procedure in the foregoing method, and details are not described herein again.
  • the fifth embodiment of the present invention further provides a link fault processing method, and a flowchart thereof is shown in FIG. 6.
  • the method includes:
  • Step 601 The receiving communication device reports that the link fault condition sent by the link aggregation group is detected.
  • Step 602 Stop the data transmission of the link fault group in the link aggregation group according to the link fault condition.
  • the port of the member in the path aggregation group where the link is faulty is set to unselected, and the member is aborted for data transmission.
  • the process of suspending the member for data transmission includes: And sending, by the communication device that is faulty on the link, the LACP packet to the peer communication device, to notify the peer device to set the corresponding port of the member whose link fault occurs on the device to be unselected.
  • the process of suspending the data transmission by the member further includes: not synchronizing, wherein the port is a port of the failed member on the peer device.
  • the port of the member in the link aggregation group that has the link fault is set to be unselected, and the process of suspending the member for data transmission includes: Not selected.
  • the process of suspending the data transmission by the member further includes: setting the port to be unsynchronized, wherein the port is a port on the device that has a link failure member.
  • the communication device is a router, but is not intended to limit the invention.
  • FIG. 7 is a schematic structural diagram of a system according to a sixth embodiment of the present invention.
  • the system includes: a communication device 701, an LACP protocol execution device 702, and functions and functions of the LACP protocol execution device 702 and the LACP execution device. The same, where:
  • the communication device 701 is configured to: perform data transmission, and detect, in real time, whether a link fault occurs between respective ports of each member of the link aggregation group during data transmission, and immediately detect the link failure. The fault condition is notified to the LACP executing device 702;
  • the LACP executing device 702 is configured to: suspend a link failure member from the link aggregation group to perform data transmission according to a link failure condition sent by the communication device.
  • the LACP Execution Device 702 is a Select Logic State Machine in LACP that selects the appropriate member for LA by selecting whether the port of the corresponding link is in the selected state.
  • the link fault condition can be detected in real time, and the fault condition is notified to the LACP in real time, and the execution device of the protocol stops the data transmission, thereby reducing the terminal of the data stream and ensuring the data transmission quality.
  • FIG. 8 is a schematic structural diagram of a communication device for implementing link fault processing according to a seventh embodiment of the present invention, where the communication device includes:
  • a data transmission unit 81 configured to perform data transmission
  • the link fault detecting unit 82 is configured to detect, in real time, whether a link fault occurs between respective ports of each member of the link aggregation group during data transmission;
  • the fault condition reporting unit 83 is configured to report the link fault condition to the LACP executing device immediately when the link fault detecting unit detects the current link fault.
  • an LACP executing apparatus for implementing link fault processing according to an eighth embodiment of the present invention.
  • the apparatus includes:
  • the fault condition receiving unit 91 is configured to receive, by the communication device, the link fault condition detected in the link aggregation group;
  • the data transmission suspension unit 92 is configured to suspend the data transmission of the member in the link aggregation group that has a link failure according to the link failure condition.
  • the data transmission suspension group is configured to aggregate the link according to the link failure condition.
  • the port of the member in which the link failure occurred is set to unselected to abort data transmission by the member.
  • the data transmission suspension unit is configured to: set a port of a member that has a link failure on the communication device that detects the link failure to be unselected, and immediately pass The communication device that detects the link failure sends an LACP selection to the communication device at the opposite end.
  • the data transmission suspension unit is further configured to: set port information of the peer device saved on the communication device that detects the link failure to be unsynchronized, wherein the port is a failed member in the pair The port on the end device, and the corresponding information of the peer device saved on the communication device is refreshed in time.
  • the data transmission suspension unit is configured to: suspend and thereby use the member to perform data transmission.
  • the data transmission suspension unit may be further configured to: set the port information of the peer device saved on the two communication devices that detect the link failure to be unsynchronized, where the port is a link failure member.
  • the port on the device, and the corresponding information of the peer device saved on the communication device is refreshed in time.
  • the communication device provided by the embodiment of the present invention can detect the occurrence of the link in time when the link is faulty, and report the link fault condition to the LACP executing device in real time, and the LACP executing device completes the link aggregation group.
  • the communication device is a router; and/or the LACP executing device is a selection logic state machine in the LACP, but is not used to limit this.
  • the method includes the following steps: During the data transmission process, the link between the respective ports of each member of the link aggregation group is detected in real time, and if yes, the subsequent steps are performed; otherwise, the process returns to this step until the data transmission ends; Notifying the LACP protocol execution device of the link failure condition, the device suspends data transmission through the link failure group member in the link aggregation group, that is, during the data transmission process, if each member of the link aggregation group is detected If a link failure occurs, the link failure condition is notified to the link aggregation control protocol LACP executing device; the LACP executing device stops the data transmission by the member in the link aggregation group where the link failure occurs.
  • the storage medium may be: a ROM/RAM, a magnetic disk, an optical disk, or the

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé permettant de réaliser la gestion de défaut de liaison, un procédé de détection de défaut de liaison, un système et un dispositif de gestion de défaut de liaison. Le procédé de gestion de défaut de liaison comprend : détection en temps réel du défaut de liaison entre des ports de membres dans un groupe d'agrégation des liaisons pendant un transfert de données. Un dispositif exécutif LACP est notifié du défaut de liaison. Par le biais du procédé, il est capable de détecter en temps réel le défaut de liaison pendant le transfert de données et une fois le défaut de liaison détecté, de notifier le dispositif exécutif LACP en vue de terminer le transfert de données à temps, de manière à éviter l'arrêt de longue durée du transfert de données en raison du défaut de liaison.
PCT/CN2008/072210 2007-08-31 2008-08-29 Système de gestion de défaut de liaison, procédé et dispositif de détection de défaut de liaison et gestion WO2009030170A1 (fr)

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CN2007101457368A CN101110663B (zh) 2007-08-31 2007-08-31 实现链路故障处理的方法、系统及装置
CN200710145736.8 2007-08-31

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