WO2012083669A1 - Procédé et appareil pour réaliser une commutation entre des dispositifs primaires en attente, sur la base d'une passerelle d'accès - Google Patents

Procédé et appareil pour réaliser une commutation entre des dispositifs primaires en attente, sur la base d'une passerelle d'accès Download PDF

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Publication number
WO2012083669A1
WO2012083669A1 PCT/CN2011/076512 CN2011076512W WO2012083669A1 WO 2012083669 A1 WO2012083669 A1 WO 2012083669A1 CN 2011076512 W CN2011076512 W CN 2011076512W WO 2012083669 A1 WO2012083669 A1 WO 2012083669A1
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Prior art keywords
standby
primary
devices
priority
active
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PCT/CN2011/076512
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English (en)
Chinese (zh)
Inventor
李博
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中兴通讯股份有限公司
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Publication of WO2012083669A1 publication Critical patent/WO2012083669A1/fr

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    • 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
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for switching between primary and backup devices based on an access gateway (Access Gateway, AG for short).
  • an access gateway Access Gateway, AG for short.
  • BACKGROUND In an AG system, a system needs to have a main control board MP (Main Processor), which is responsible for planning and allocating system resources for various services.
  • MP Main Processor
  • NP Net Processor
  • the AG service is divided into a Broadband service and a Narrow band service, and the types of system resources required for these two types of services are also different.
  • broadband requires large data processing and storage
  • narrowband requires high real-time performance of the system.
  • this data requires high reliability. Therefore, the concept of master-slave needs to be introduced.
  • the same MP is equipped with 2 blocks
  • the same NP is equipped with two blocks
  • two MPs are used for active and standby
  • two NPs are used for active and standby.
  • the primary device is responsible for allocating resource selection control logic.
  • a primary object of the present invention is to provide a method and apparatus for switching between primary and backup devices based on an access gateway to solve at least the above problems.
  • a primary backup device switching method based on an access gateway includes: configuring N standby devices for a primary device carrying a service, where N ⁇ l; When an abnormality occurs in the device, an available backup device is selected from the N standby devices; and the selected backup device is used to replace the primary device to carry the service.
  • the step of configuring N standby devices for one primary device carrying the service includes: setting the primary device as a unit state, and setting each of the standby devices as a port state; in one of the above unit states and N above A mapping relationship is established between port states.
  • the step of selecting an available spare device from the above N standby devices includes: selecting the above-mentioned available spare devices with the highest priority from among the N standby devices.
  • the method further includes: configuring the priority of the N standby devices according to the sequence reported to the line card, where the priority of the foregoing standby device is reported first The level is higher than the priority of the above-mentioned standby device reported later.
  • the method further includes: setting the primary device as a backup device, and setting a priority corresponding to the backup device to a lowest level priority.
  • Determining whether the primary device is abnormal by one of the following steps: if the primary device is migrated from the available state to the unavailable state, it is determined that the primary device is abnormal; if the primary monitoring device is in the switching monitoring resource If the one or more resources are abnormal, it is determined that the primary device is abnormal; or if the switching command sent by the user is received, it is determined that the primary device is abnormal.
  • the step of using the selected backup device to replace the foregoing primary device to carry the service includes: determining whether the active/standby switchover flag corresponding to the active/standby switchover is true; if true, the active/standby switchover is not completed, and the receiving is not completed.
  • an access gateway-based primary backup device switching apparatus including: a configuration unit configured to configure N standby devices for one primary device carrying a service, where N ⁇ l; selecting a unit, configured to select an available spare device from the N standby devices when the primary device is abnormal; the switching unit is configured to use the selected backup device instead of the primary device to carry the above business.
  • the configuration unit includes: a configuration module, configured to set the primary device to a unit state, and set each of the standby devices to a port state; and the mapping module is configured to be in one of the foregoing unit states and N of the foregoing port states Establish a mapping relationship.
  • the selecting unit includes: a selecting module, configured to select the available spare device with the highest priority from the N standby devices.
  • the configuration unit is further configured to: prior to selecting the available spare device with the highest priority among the N standby devices, configure the priority of the N standby devices according to the sequence reported to the line card, where the foregoing standby is reported first. The priority of the device is higher than the priority of the above-mentioned standby device reported later.
  • FIG. 1 is a preferred flowchart of a method for switching a primary backup device based on an access gateway according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a primary backup device switching device based on an access gateway according to an embodiment of the present invention
  • FIG. 3 is a flowchart of an NP booting active/standby allocation according to an embodiment of the present invention
  • FIG. 4 is a flowchart of initiating a switching after a primary NP device is abnormal according to an embodiment of the present invention
  • FIG. 6 is a flowchart of command initiation switching according to an embodiment of the present invention.
  • FIG. 1 is a preferred flowchart of a method for switching a primary backup device based on an access gateway according to an embodiment of the present invention, which includes: S102. Configure N standby devices for the primary device that carries the service, where N ⁇ l
  • the step of configuring N standby devices for one primary device carrying services includes: setting the primary devices to a unit state, and setting each of the standby devices to a port state. Establishing a mapping relationship between one of the Unit states and N of the Port states. In the preferred embodiment, the switching can be effectively performed by such a mapping relationship.
  • the step of selecting one available backup device from the N standby devices may include, but is not limited to: selecting the available backup device with the highest priority from the N backup devices.
  • the present invention can also select another available backup device from the N spare devices by using other strategies.
  • the access gateway-based primary standby switching method according to the embodiment of the present invention further includes: following the sequence reported to the line card, before the selecting the available backup device with the highest priority from the N backup devices.
  • the priority of the N standby devices is configured, where the priority of the standby device that is reported first is higher than the priority of the standby device that is reported later.
  • the priorities are configured in the reported order, and a valid spare device can be better selected to replace the primary device.
  • the access gateway-based primary backup device switching method when the selected backup device is used to replace the primary device to carry the service, further includes: setting the primary device as The standby device, and the priority corresponding to the standby device is set to the lowest priority.
  • the primary device that is currently abnormal is set as the standby device with the lowest priority.
  • the primary device is determined whether the primary device is abnormal by one of the following steps: if the primary device is migrated from an available state to an unavailable state, determining that the primary device is abnormal; if the primary device is If the one or more resources in the switching monitoring resource are abnormal, it is determined that the primary device is abnormal; or if the switching command sent by the user is received, it is determined that the primary device is abnormal.
  • a variety of determinations are provided to enable the present invention to be applied to a variety of scenarios.
  • the step of using the selected backup device to replace the primary device to carry the service includes: determining whether the active/standby switch flag corresponding to the active/standby switchover is true; if true, indicating that the active/standby switch is active If the switchover is not completed, the received heartbeat signal is not processed; if not, it indicates that the master/slave switchover is completed, and the received heartbeat signal is processed.
  • the active/standby switchover is used to determine whether the active/standby switchover is complete, thereby performing different operations on the heartbeat signal, thereby improving the stability of the active/standby switchover.
  • FIG. 2 is a schematic structural diagram of an access gateway-based primary backup device switching apparatus according to an embodiment of the present invention, which includes: a configuration unit 202 configured to configure N primary devices for one bearer service a backup device, wherein: N ⁇ 1; the selecting unit 204 is connected to the configuration unit 202, and is configured to select an available standby device from the N standby devices when the primary device is abnormal; the switching unit 206, Connected to the selection unit 204, arranged to use the selected spare device in place of the primary device to carry the service.
  • the traditional dual-device mutual active and standby devices are expanded, and the primary device and the corresponding multiple backup devices are used to securely manage the device, thereby solving the related technologies in the active and standby devices.
  • the configuration unit 202 includes: a configuration module, configured to set the primary device to a unit state, and set each of the standby devices to a port state; and a mapping module, configured to be in the one of the units A mapping relationship is established between the state and the N port states.
  • the switching can be effectively performed by such a mapping relationship.
  • the selecting unit 204 includes: a selecting module, configured to select the available standby device with the highest priority from the N standby devices.
  • the selection unit in the preferred embodiment may also select another available backup device from the N spare devices by using other policies.
  • the configuration unit 202 is further configured to configure the priority of the backup devices according to the sequence reported to the line card before selecting the available backup devices with the highest priority from the one of the backup devices.
  • the priority of the standby device that is reported first is higher than the priority of the standby device that is reported later.
  • the priorities are configured in the reported order, and a valid spare device can be better selected to replace the primary device.
  • the configuration unit 202 sets the primary device as a backup device, and sets a priority corresponding to the backup device to a lowest level. Priority. In the preferred embodiment, the primary device that is currently abnormal is set as the standby device with the lowest priority.
  • the access gateway-based primary standby switching device determines whether the primary device is abnormal by one of the following steps: if the primary device migrates from an available state to an unavailable state, Determining that the primary device is abnormal; if one or more of the resources of the switching monitoring resource on the primary device are abnormal, determining that the primary device is abnormal; or receiving the user The sent switching command determines that the primary device is abnormal.
  • a variety of determinations are provided to enable the present invention to be applied to a variety of scenarios.
  • the step of using the selected backup device to replace the primary device to carry the service includes: determining whether the active/standby switch flag corresponding to the active/standby switchover is true; if true, indicating The active/standby switchover is not completed, and the received heartbeat signal is not processed; if not, it indicates that the active/standby switchover is completed, and the received heartbeat signal is processed.
  • the active/standby switchover is used to determine whether the active/standby switchover is complete, thereby performing different operations on the heartbeat signal, thereby improving the stability of the active/standby switchover.
  • Embodiment 3 This embodiment provides an update alternative for hardware active and standby management.
  • the original 4 original concepts of the main and the standby are expanded, and the active and standby devices are expanded from 1:1 (one main use and one standby) to 1: (- main use multiple standby), which enhances the system. Robustness makes the system more stable.
  • 1: ⁇ device management can allow multiple backup devices, and the backup devices are managed in a priority manner. When the primary device is abnormal, the highest priority available device in the standby device is used as the primary device.
  • N device management can implement logical data of Unit and Port: Unit (control unit); Port port resource, which is a sub-resource to which the unit belongs, is used to identify each device. If separate device states are used to indicate the active and standby states respectively, each service application and system application needs to query each device, which is too complicated and inefficient, so the control of Unit + Port is introduced when managing the standby device.
  • Unit control unit
  • Port port resource which is a sub-resource to which the unit belongs
  • Unit indicates the total status of the devices as the master and standby devices, and the port status indicates the active and standby status of each device.
  • N (1 master)
  • NP network processor
  • Port manages the device.
  • the corresponding relationship is that one unit corresponds to N ports, and each port corresponds to one NP device, and multiple NP devices belong to one unit.
  • the corresponding Unit and Port of each device are dynamically allocated on the (MP) main control board.
  • the initial value is assigned to 1.
  • the configured NP device dynamically allocates unoccupied Unit and Port resources, and then the main port of the port.
  • the standby attributes are associated to be subordinate to the dynamically allocated Unit. After the line card is deleted, the active and standby ports and the association information with the unit are cleared, so that the Unit and Port resources are in the state of being dynamically allocated.
  • the priority of the standby device is recorded in the Unit data. The priority can be configured and adjusted through commands.
  • the initial priority is assigned in the order of 4 ⁇ on the line card.
  • the priority of the standby device is assigned to the high priority.
  • the priority of the last 4 ⁇ is decremented.
  • the standby device upgrade policy is to use the highest priority available standby device.
  • the standby device is abnormal, the priority of the standby device in the Unit data and the Port data is updated, the device priority list after the abnormal device node is moved forward, and the abnormal device is inserted into the link header, and the priority is reduced to the lowest.
  • the NP line card side's own data management is managed by the Port method.
  • This configuration is responsible for maintaining the configuration delivered by the MP main control board, including the active status, standby status, service status, and offline status.
  • the master/slave switching method provided in this embodiment is as follows: After the NP is started, the initial port state is set to the MP, and then the MP determines the primary standby state of the NP according to the preemptive manner, that is, the port state of the NP is first reported to be the primary port. When the NP of the primary NP is abnormal (the abnormality at this time can be defined by the relevant application), the NP notifies the MP of the abnormal cause, and the MP determines that the standby can be switched.
  • the MP initiates the master/slave state switchover, reassigns the configuration to the NP in the active/standby state, and switches the original primary service resource to the standby device to enable the service to run normally.
  • the following describes the specific implementation method of the 1:N device, which is divided into the following steps:
  • the initial port state of the NP is given to the MP, and then the MP allocates the active/standby state of the NP device according to the dynamically assigned control logic.
  • the NP that reports the port state is allocated as the first in state of port is master, and the MP sends the primary data to the primary NP, and notifies the NP to update its state for the primary use, and then The primary NP starts to report the heartbeat for the MP to monitor; the NP of the last 4 ⁇ Port state is assigned as the second in state of port is slave, and the MP sends the standby data to the standby NP, notifying the The NP updates its own state to standby. Then, the standby NP starts to report the heartbeat (including the port primary standby status information) for monitoring by the MP.
  • the MP checks the NP Port state migration process. If the standby device is migrated from the available state to the unavailable state, it only informs the service that the device is not available now, and the resource needs to be reselected from the active device. If the active device is migrated from the available state to the unavailable state, and the standby device is available at this time, the MP initiates the switching of the NP device, changes the primary standby state information of the NP Port data recorded on the MP, and sets the port state of the active device.
  • the primary NP detection module is responsible for scanning whether the registered resources are normal, if one or more of these resources (Any case when all kinds of resources are abnormal)
  • the active NP initiates a switching notification to notify the MP to perform switching (S501).
  • the MP sets the switching timer.
  • the timer timeout period is tentatively set to 5 seconds (the timeout period can be adjusted according to different hardware of the device), and the reason for the port switching and the switching flag are set, wherein the switching flag is used for The heartbeat is blocked (S502).
  • the heartbeat of the NP of the unit it is determined whether the switching flag used for the port switching is true.
  • the MP queries the standby NP for the standby switching condition (S503), and the standby NP sends the query result to the MP, for example, informing the MP standby NP that the switching condition is met (S504).
  • the MP sends a configuration message to the standby NP to notify the NP switchover (S505).
  • the switchover succeeds the timer and the switch flag are cancelled (S506), and then the standby NP reports the heartbeat (Port is mainly used) i MP (S507), 4 ⁇ heartbeat (Port is standby) i MP (S508) on the primary NP. If the switch fails (for example, the above-mentioned set switch timer expires, or the standby NP device is also unavailable or the resource is abnormal.
  • the MP re-distributes the configuration to the primary NP and the standby NP, so as to restore to the port state before the switching (S509), and then, the primary NP has 4 ⁇ heartbeat (Port is mainly used) to the MP (S510), After the switchover detection timer is set, set the port active/standby state corresponding to the NP on the standby NP, and then reconfigure the new active/standby state. To NP, the NP is notified to update its own port status, and the heartbeat is reported to the MP as a response, and the MP starts monitoring the port status of the NP.
  • Heartbeat is reported to the MP as a response
  • this switching is manually initiated by the user (S601).
  • the MP sets the switching timer.
  • the timer expires for 5 seconds.
  • the timeout period can be adjusted according to different hardware of the device), and the reason for the port switching and the switching flag are set, wherein the switching flag is used to block the heartbeat (S602).
  • the switching flag used for the port switching is true. If true, the processing is not processed, so as to prevent the NP port processing from being disordered when the switching is not completed. .
  • the MP queries the standby NP for the standby switching condition (S603), and the standby NP sends the query result to the MP, for example, informing the MP standby NP that the switching condition is met (S604).
  • the MP sends a configuration message to the standby NP to notify the NP switchover (S605). If the switchover succeeds, the timer and the switch flag are cancelled (S606), and then the standby NP reports the heartbeat (Port is mainly used).
  • the main NP is 4 ⁇ heartbeat (Port is standby) to MP (S608)th. If the switchover fails (for example, if the switchover timer is set to expire or the standby NP device is unavailable or the resource is abnormal), the MP re-delivers the configuration to the active NP and the standby NP to restore the port state before the switchover. (S609), then, the primary NP is 4 ⁇ heartbeat (Port is used for) to MP (S610), and the standby NP is 4 ⁇ (Port is standby) to MP (S610).
  • the monitoring module corresponding to the NP Port on the MP determines the primary standby state of the port in the heartbeat message reported by the NP, if a dual-active or dual-standby conflict occurs.
  • the configuration data is re-configured to change the active/standby status of the port currently reported to the NP device to prevent abnormalities on the service.
  • the preferred embodiment has the following beneficial effects: The expansion of the management of the active and standby devices can be implemented on the basis of the standard equipment, and a convenient and practical solution is invented for the management functions of the primary and secondary devices.
  • the active/standby management mechanism includes:
  • PortState structure is given to the MP.
  • the MP receives the PortState message on the NP, updates the Port state recorded in the UnitState, and assigns the active and standby states of the NP.
  • the NP device After receiving the configuration message sent by the MP device, the NP device configures the NpPortState structure and then reports it. For the process, refer to Figure 3.
  • the MP side periodically monitors whether the NP device is working normally. For the specific process, refer to FIG. 4 . As shown in FIG. 4, the MP side sets a 2-second NP device Port state detection cycle timer TIMER4 to poll all NP devices. If the primary NP does not report the heartbeat or reports that the port status is abnormal (for example, the heartbeat message is not received within 10 seconds), the primary NP is processed offline. If there is a standby NP, the MP queries the standby NP for the standby switching condition, and the standby NP ⁇ ! The result of the query is sent to the MP to inform the MP that the standby NP meets the switching condition.
  • TIMER4 2-second NP device Port state detection cycle timer
  • the MP Under the alternate NP-compliant switching condition, the MP sends a configuration message to the current primary NP and the standby NP to notify the NP switch. 4)
  • the important resources registered by the software are regularly monitored. When the resources are abnormal or unavailable, the switching process is initiated. For the specific process, reference may be made to FIG. 5 and the description of FIG. 5 above.
  • the NP notifies the MP to attempt to switch by sending an NP ChangeOver message. After receiving the message, the MP checks whether the standby device in the UnitState structure is available, and then performs the ascending operation. 5) Exception handling:
  • the NP initiates a switchover, sets the switchover timer, and periodically checks whether the switchover is successful. If the switchover fails, the NP PortState state before the switchover is restored.
  • the Ppmgt_checkreceive_proc( ) function detects whether there is an active device in the standby device list in the UnitState structure. If there is a notification, the device is downgraded to standby. For the specific process, see Figures 5 and 6.
  • the Ppmgt_checkreceive_proc ( ) function selects the highest priority of the alternate device list.
  • the present invention is applicable to devices requiring high stability, high reliability, and high efficiency in systems such as AG (Access Gateway Integrated Access Gateway), PON (Passive Optical Networks, Passive Optical Networks, including EPON, GPON, NG-PON) .
  • AG Access Gateway Integrated Access Gateway
  • PON Passive Optical Networks, Passive Optical Networks, including EPON, GPON, NG-PON
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.

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

Abstract

La présente invention se rapporte à un procédé et à un appareil adaptés pour réaliser une commutation entre des dispositifs primaires en attente, sur la base d'une passerelle d'accès. Le procédé selon l'invention consiste : à configurer N dispositifs en attente pour un seul dispositif primaire prenant en charge des services, et, quand une anomalie se produit sur le dispositif primaire, à sélectionner un dispositif en attente disponible parmi les N dispositifs en attente ; et à utiliser le dispositif en attente sélectionné pour prendre en charge le service, à la place du dispositif primaire. La solution technique de la présente invention permet de résoudre le problème d'instabilité dû à la relation 1:1 entre le dispositif primaire et le dispositif en attente, qui existe dans l'état de la technique. Elle permet d'autre part de réaliser des transitions sans à-coups des ressources du système et des commutations lissées d'applications de service quand le système ne fonctionne pas correctement.
PCT/CN2011/076512 2010-12-23 2011-06-28 Procédé et appareil pour réaliser une commutation entre des dispositifs primaires en attente, sur la base d'une passerelle d'accès WO2012083669A1 (fr)

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CN2010106057946A CN102025551A (zh) 2010-12-23 2010-12-23 基于接入网关的主备用设备切换方法和装置

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