WO2007006214A1 - Systeme et procede de surveillance de l'etat d'un port de dispositif - Google Patents

Systeme et procede de surveillance de l'etat d'un port de dispositif Download PDF

Info

Publication number
WO2007006214A1
WO2007006214A1 PCT/CN2006/001603 CN2006001603W WO2007006214A1 WO 2007006214 A1 WO2007006214 A1 WO 2007006214A1 CN 2006001603 W CN2006001603 W CN 2006001603W WO 2007006214 A1 WO2007006214 A1 WO 2007006214A1
Authority
WO
WIPO (PCT)
Prior art keywords
light state
state tracking
port
tracking module
module
Prior art date
Application number
PCT/CN2006/001603
Other languages
English (en)
French (fr)
Inventor
Wei Xiong
Liansheng Xie
Xiqian Xie
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to CNA2006800121993A priority Critical patent/CN101160818A/zh
Priority to DE602006010063T priority patent/DE602006010063D1/de
Priority to EP06753119A priority patent/EP1890427B1/en
Priority to AT06753119T priority patent/ATE447273T1/de
Publication of WO2007006214A1 publication Critical patent/WO2007006214A1/zh
Priority to US11/967,833 priority patent/US20080104285A1/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/08Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/30Monitoring
    • G06F11/3003Monitoring arrangements specially adapted to the computing system or computing system component being monitored
    • G06F11/3041Monitoring arrangements specially adapted to the computing system or computing system component being monitored where the computing system component is an input/output interface
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/30Monitoring
    • G06F11/3055Monitoring arrangements for monitoring the status of the computing system or of the computing system component, e.g. monitoring if the computing system is on, off, available, not available
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/30Monitoring
    • G06F11/32Monitoring with visual or acoustical indication of the functioning of the machine
    • G06F11/324Display of status information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02Standardisation; Integration
    • H04L41/0213Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/22Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks comprising specially adapted graphical user interfaces [GUI]

Definitions

  • the present invention relates to a network management system and method, and more particularly to a monitoring system and method for a telecommunication device port in a network management system.
  • the network management system (referred to as the network management system) is a software system for managing various telecommunication devices. Through the network management, functions such as configuration, maintenance, monitoring, service distribution, and performance analysis of the telecommunication devices can be more intuitive, convenient, and efficient. For the maintenance personnel of the telecom operators, it is important to know the status of each port of the running device in real time in daily equipment and network maintenance work. For example: For each regular phone user, there is a PSTN port. When the user makes a call, the port status will be displayed as "Busy”. When the user hangs up, the port status is displayed as "Idle". By observing the operating status of various ports, the maintenance personnel of the telecom operators can quickly understand whether the telecommunication network is operating normally.
  • the network management system must also be able to realize the function of real-time understanding of the operation of various ports on the network.
  • these running ports (such as PST, ISDN, xDSL ports) are geographically distributed and the number is extremely large. Presenting a solution that monitors the status of each port in real time, intuitively, and selectively is a challenging task.
  • the running status of each port is reflected in real time through the color of the corresponding indicator on the telecommunication device (or board).
  • this method has the following disadvantages: The device (or the board) is physically distributed and cannot be observed in a large number of ports. The number of indicators on the device (or board) is limited and cannot be used for each port.
  • Selectively track certain ports such as tracking the port status of the specified box, specifying the port status of the phone number segment, etc.; can not directly obtain the associated information from the specified indicator, such as the corresponding phone number of a faulty port, configured Service type, L3/EF address, terminal type, terminal ID, port name, etc.; and cannot have multiple tracking tasks at the same time.
  • the technical problem to be solved by the present invention is to provide a device port monitoring system and method to solve the problem that the existing port monitoring system cannot perform monitoring of a designated port.
  • the technical solution of the present invention provides a device port monitoring system, including a light state tracking module that is separately connected to each of the physically dispersed devices, and the light state tracking module generates a tracking instruction according to the information of the input specific port.
  • the light state tracking module sends a message to the specific device to start the light state tracking task, and displays the state of the specific port returned by the specific device, and the light state tracking module further receives and displays the state change of the specific port, and the light state tracking module
  • the light state tracking task is also stopped according to the command or network status.
  • the system further includes a real-time message processing module communicatively coupled to the light state tracking module and converting the state change of the port to the light state tracking module identifiable information and transmitting the signal to the light state tracking module in real time.
  • the system further includes a service information management module that is in communication with the light state tracking module, and the service information management module acquires association information of the corresponding port according to the port state received by the light state tracking module, and transmits the information to the light state tracking module.
  • the light state tracking module displays the corresponding port
  • the system also includes a device management module coupled to the light state tracking module;
  • the light state tracking module receives the tracking condition and transmits the tracking condition to the device management module, and the device management module generates a port list to be tracked according to the tracking condition transmitted by the light state tracking module, and returns the port list to the light state tracking module;
  • the light state tracking module sends a message to the specific device according to the port list to start the light state tracking task.
  • the system further includes a timer for timing a handshake of the tracking task initiated by the light state tracking module, and the timer is connected to the light state tracking module.
  • the light state tracking module includes a counter, and the counter starts counting when the light state tracking module sends a handshake message to the device, and increments or decrements when the light state tracking module fails to shake hands with the device, and when the light state tracking module and the device shake hands successfully Reset; the light state tracking module stops the light state tracking task when the counter reaches a certain value.
  • the invention also provides a device port monitoring method, comprising the following steps:
  • the light state tracking module obtains input information for tracking a specific port
  • the light state tracking module generates a tracking instruction according to the information of the port and sends a message to the specific device to start the light state tracking task;
  • the light state tracking module displays a state of a specific port returned by the specific device and a state change of the port
  • Step (d) The light state tracking module stops the light state tracking task according to the instruction or the network state.
  • Step (a) includes:
  • the light state tracking module receives the tracking condition through the graphical user interface, and transmits the tracking condition to the device management module;
  • the device management module generates a list of corresponding ports according to the tracking condition, and returns the list to the light state tracking module.
  • Step (b) includes the following steps:
  • the light state tracking module performs the tracking task in the light state tracking task list, and generates a tracking Instructing and sending a message to a specific device to initiate a light state tracking;
  • the light state tracking module starts the timer and starts the handshake procedure according to the timer.
  • the step of the handshake process includes: when the light state tracking module sends a handshake message to the device, the counter is started to count, the counter is incremented or decremented when the light state tracking module and the device fail to handshake, and the counter is successful when the light state tracking module and the device shake hands successfully.
  • the light state tracking module stops the light state tracking task when it detects that the counter count reaches a certain value.
  • the device port monitoring system and method of the present invention reduces the overhead of port monitoring by using a dynamic registration tracking task, thereby facilitating port monitoring. In this way, when the number of ports is extremely large, real-time tracking can be ensured, and the resource overhead can be effectively reduced. In addition, the system can automatically stop the light tracking task in case of equipment failure, network management failure, network failure and other abnormal conditions to save resource overhead.
  • FIG. 1 is a schematic diagram of a device port monitoring system of the present invention
  • FIG. 2 is a flow chart of a method for monitoring a device port of the present invention
  • FIG. 3 is a schematic diagram of a startup light state tracking process in the device port monitoring method of the present invention
  • FIG. 4 is a schematic diagram of a stop light state tracking flow in the device port monitoring method of the present invention
  • FIG. 6 is a schematic diagram of a flow of acquiring port association information in a device port monitoring method of the present invention
  • FIG. 7 is a schematic diagram of a normal handshake process between a light state tracking module and a device in the device port monitoring method of the present invention; ;
  • FIG. 8 is a schematic diagram of a handshake abnormality flow between a light state tracking module and a device in the device port monitoring method of the present invention.
  • Port monitoring system 10 includes a light state tracking module 13, a service information management module 11, a device management module 12, a real-time message processing module 14, and a timer 16, wherein the service information management module 11, the device management module 12, the real-time message processing module 14, and the timer 16 They are respectively connected to the light state tracking module 13 in communication.
  • the light state tracking module 13 is also communicatively coupled to a plurality of devices 20 (only one of which is shown in FIG. 1), which may be geographically dispersed.
  • Each device 20 can include a plurality of ports through which device 20 can connect different functional devices (e.g., access devices, terminal devices, or other devices) to enable interconnection of such functional devices.
  • the device management module 12 can generate a list of qualified ports according to the tracking conditions, and the module can be implemented by retrieving the port database.
  • the light state tracking module 13 includes a graphical user interface (GUI) through which a tracking condition (eg, specifying a specific frame, a port of a particular phone number segment, etc.) or a command to start/stop the light state tracking can be received;
  • GUI graphical user interface
  • the status of the indicator light of the port is displayed in the form of an icon. In this embodiment, different states of the indicator light are displayed in different colors.
  • the light state tracking module 13 can transmit the received tracking condition to the device management module 12 and generate an instruction according to the port list returned from the device management module 12 to send a message to a specific device including the corresponding port to start or stop the light state tracking, and send
  • the message can be determined according to the needs of the user, such as the Simple Network Management Protocol (SNMP) message currently used.
  • SNMP Simple Network Management Protocol
  • the present invention can also be implemented by using messages of other protocols, and the present invention does not limit the specific protocols used by the messages. In the following embodiments, the present invention is described by taking a simple network management protocol as an example.
  • the device 20 can send the status of the corresponding port to the light state tracking module 13 according to the received SNMP message, and establish a task list, and return the port change to the light state tracking module 13 when the corresponding port state changes.
  • the light state tracking module 13 communicates with the device 20 by means of a handshake.
  • the service information management module 11 can retrieve the detailed information of the association of the specific port, such as the phone number corresponding to the port, the configured service type, the L3/EF address, the terminal type, the terminal ID, the port name, etc., and the port attributes corresponding to the different port types. It may be different, the module can be implemented by retrieving the database of the corresponding business.
  • the real-time message processing module 14 can notify the light state tracking module 13 of the change of the light state when the light state of a certain port changes, so that the light state tracking module 13 can change the corresponding port. The color of the indicator light is displayed.
  • the reason why the real-time message processing module 14 is used instead of the light state tracking module 13 to directly receive the trap is because: For a network management system, there are many types of traps, and the port state change trap is only one of them, and the reception/interpretation of these traps/ Classification/distribution is easier and more efficient with a unified real-time message processing module.
  • the light state tracking module 13 further includes a counter (not shown) that starts counting when the light state tracking module 13 sends an SMP message to the device; plus 1 when the light state tracking module 13 fails to shake hands with the device 20; The light state tracking module 13 is cleared when the handshake with the device 20 is successful.
  • the light state tracking module 13 detects that the counter count reaches a certain value (that is, the handshake fails for more than a specified number of times)
  • the corresponding light state tracking task is stopped, and the corresponding tracking task is deleted from the task list. Because of this, the network may malfunction or the corresponding device 20 may malfunction.
  • the timer 16 is also coupled to the light state tracking module 13 to provide a timed handshake time for multiple tracking tasks of the light state tracking module 13.
  • the light state tracking module 13 receives the input of the tracking condition through the graphical user interface and transmits the condition to the device management module 12 (step S211).
  • the device management module 12 generates a to-be-tracked port list according to the tracking condition and returns the list to the light state tracking.
  • Module 13 (step S212).
  • the light state tracking module 13 generates an instruction based on the returned port list to transmit the SMP to the specific device including the corresponding port to start the light state tracking (step S213).
  • the light state tracking module 13 starts a timer and adds a tracking task to the task list, and through the task list, multiple tracking tasks can be started simultaneously (step S214).
  • the light state tracking module 13 receives a message from the device 20 containing the corresponding port status, the message may be an SNMP message (step S215), and the light state tracking module 13 may display the status of the ports on the graphical user interface with corresponding icons. , the port is represented by a different icon color Different states (step S216).
  • the device 20 also generates its own task list based on the SNMP message received from the light state tracking module 13, and sends a light state change trap to the light state tracking module 13 when the corresponding port state changes.
  • the light state tracking module 13 determines whether it is a port state change trap (step S217). If the port state change Tmp is received, the light state tracking module 13 refreshes the status display of the corresponding port on the graphical user interface (step S218), and returns to step S216. Further, the timer 16 also periodically detects and judges whether or not the handshake procedure between the light state tracking module 13 and the device 20 is started (step S219). The handshake can be started according to the specified conditions.
  • the specified condition can be to track the port status of the specified box; to track the port status of the specified phone number segment; to track only the status of the psto port; or a combination between them.
  • the handshake timer time occurs, the light state tracking module 13 issues a handshake message to the device 20 (step S220), otherwise returns to step S216. If the handshake is successful, that is, the light state tracking module 13 receives the response returned by the device 20, the counter is cleared (step S222), and the flow returns to step S216. If the light state tracking module 13 does not receive a response from the device within the specified time, the counter is incremented by 1, and the handshake information is sent again.
  • the light state tracking module 13 detects whether the count of the counter exceeds a predetermined value (step S223). If the predetermined value is exceeded, it indicates that the network is likely to be faulty, the light state tracking task is stopped, the task is deleted from the tracking list, and the light state display on the graphical user interface is cleared (step S224). If the value of the counter does not exceed the predetermined value, it returns to step S220.
  • the detailed information of the tracking port association may also be obtained through the service information management module 11, for example, the corresponding phone number of a port, the configured service type, the L3/EF address, the terminal type, and the terminal ID. , port name, etc.
  • the light state tracking module 13 can also obtain the corresponding port state by actively polling the device port state.
  • the polling interval can be set as needed. However, if the polling interval is long (such as once every few seconds), the real-time performance cannot be guaranteed. If the polling interval is too short, the network management will have serious performance problems. And the network management may not work properly.
  • the light state tracking module 13 receives the filtering condition for starting the tracking through a graphical user interface (GUI) (such as starting port tracking of a certain device of a certain device), and issues a startup light state tracking command.
  • GUI graphical user interface
  • the light state tracking module 13 acquires from the device management module 12 a list of ports that satisfy the specified conditions.
  • the light state tracking module 13 issues an SNMP message to the device 20 to initiate state tracking of the port that meets the specified conditions.
  • the device 20 establishes its own task list and uses Trap to report the current status of all ports that meet the specified conditions.
  • the light state tracking module 13 starts a handshake timer and adds a tracking task to the tracking task list.
  • the light state tracking module 13 displays the tracked port list in the graphical user interface and displays the current state of the corresponding port with icons of different colors.
  • the first light state tracking module 13 receives a command to stop the light state tracking through the graphical user interface.
  • the light state tracking module 13 issues a stop light state tracking command to the device 20.
  • the device 20 stops tracking the status of the corresponding port, and does not send Tmp to the network management even if the port status changes.
  • the light state tracking module 13 stops the handshake timer and deletes the corresponding item in the tracking task list.
  • the light state tracking module 13 clears the related interface display.
  • FIG. 5 is a schematic diagram of a light state change reporting process in the device port monitoring method of the present invention.
  • Device 20 detects a change in the status of the tracked port and sends the status change to the light state tracking module 13.
  • the real-time message processing module 14 notifies the light state tracking module 13 that the port state has changed.
  • the light state tracking module 13 updates the interface, and the current color of the corresponding port is indicated by an icon of a specified color.
  • FIG. 6 is a schematic diagram of a process of acquiring port association information in a device port monitoring method according to the present invention.
  • a port status light icon can be clicked on the graphical user interface in the light state tracking module 13 to indicate the details of the port association.
  • the light state tracking module 13 issues a command to the business information management module 11 to acquire detailed information of the designated port.
  • the service information management module 11 returns the corresponding port details to the light state tracking module 13.
  • the light state tracking module 13 displays the details of the port on the graphical user interface.
  • FIG. 7 and FIG. 8 are schematic diagrams showing a handshake process between a light state tracking module and a device in the device port monitoring method of the present invention.
  • the timer periodic event set in the light state tracking module 13 occurs, the light
  • the state tracking module 13 issues an SNMP message to the device 20 to initiate a handshake procedure. If device 20 returns a handshake success response, light state tracking module 13 clears the counter; if device 20 does not respond within the specified timeout period, then light state tracking module 13 increments the counter by one.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • General Physics & Mathematics (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Selective Calling Equipment (AREA)
  • Small-Scale Networks (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Description

设备端口监控系统及方法
技术领域
本发明涉及一种网络管理系统及方法, 特别涉及一种网络管理系统中的 电信设备端口的监控系统及方法。
发明背景
网络管理系统 (简称网管) 是对各种电信设备进行管理的软件系统, 通过网管, 可以使得对电信设备的配置、 维护、 监测、 业务发放、 性能分 析等功能使用起来更直观方便高效。 对于电信运营商的维护人员来说, 在 日常的设备、 网络维护工作中, 实时地了解运行着的设备每个端口的状态 是很重要的。 例如: 对于每个普通电话用户, 都对应着一个 PSTN端口, 当用户打电话时, 端口状态会显示为 "忙 ", 当用户挂断电话时, 端口状态 显示为 "空闲"。 电信运营商的维护人员通过观察各种端口的运行状态, 就 能很快地了解电信网络运行是否正常。 因此, 网管系统也必须能够实现实 时地了解网上各种端口的运行情况的功能。但是这些运行的端口(如 PST 、 ISDN, xDSL端口) 物理位置上是分布在各地的, 数量是极其庞大的。 提 出一个实时地、 直观地、 可选择地观察每个端口的状态的解决方案是颇具 挑战性的任务。
目前一般是通过电信设备 (或单板) 上相应的指示灯的颜色来实时地 反映各个端口的运行状态, 如故障、 空闲、 忙、 激活、 去激活等等。 但是 这种方法存在着以下缺点: 设备 (或单板) 物理位置上是分布的, 无法集 中观察数目较多的端口; 设备 (或单板) 指示灯数目有限, 无法对应每一 个端口; 无法有选择地跟踪某些端口, 如跟踪指定框的端口状态、 指定电 话号码段的端口状态等; 无法直接从指定的指示灯上获得关联的信息, 如 某个故障端口的对应的电话号码、配置的业务类型、 L3/EF地址、终端类型、 终端 ID、 端口名称等; 以及无法同时有多个跟踪任务等。
此外, 还可通过在网管上设置仿真面板来指示各个端口的状况。 但是 这种方法的缺点和直接观察物理设备上的指示灯类似, 除了能够避免地理 位置的不同而能够集中观察外, 并不能避免其余的缺点。
还有在网管中使用一个窗口来集中显示某个设备特定类型端口及其状 态, 如所有 PST 端口的信息显示在某个表格中。 这种方法的缺点是: 虽 然能够过滤显示指定条件端口的显示, 但是因为没有跟踪任务的概念, 无 法启动 /停止跟踪指定条件的端口状态; 对于海量端口数据, 实时上报的表 示端口状态或者端口状态变化的消息如 SNMP ( Simple Network Management Protocol, 简单网络管理协议)中的 Trap消息的流量太大, 严 重影响性能。 无法执行多个任务并行跟踪; 当½机、 网管或者网络异常时, 无法自动停止端口状态跟踪以节约资源开销。
发明内容
本发明所要解决的技术问题在于, 提供一种设备端口监控系统及方法, 以解决现有端口监控系统不能进行指定端口的监控的问题。
本发明的技术方案是, 提供一种设备端口监控系统, 包括与各个物理 上分散的设备分别通信连接的灯态跟踪模块, 所述灯态跟踪模块根据输入 的跟踪特定端口的信息生成跟踪指令, 灯态跟踪模块向特定设备发送消息 启动灯态跟踪任务, 并显示所述特定设备返回的特定端口的状态, 所述灯 态跟踪模块还接收并显示特定端口的状态改变, 所述灯态跟踪模块还根据 指令或网络状态来停止灯态跟踪任务。
所述系统还包括与所述灯态跟踪模块通信连接、 并将端口的状态变化 转换为灯态跟踪模块可识别信息、 实时地传送到所述灯态跟踪模块显示的 实时消息处理模块。
所述系统还包括与所述灯态跟踪模块通信连接的业务信息管理模块, 所述业务信息管理模块根据灯态跟踪模块接收的端口状态, 获取对应端口 的关联信息, 并传输至灯态跟踪模块, 由灯态跟踪模块显示对应端口的关 所述系统还包括与所述灯态跟踪模块连接的设备管理模块;
灯态跟踪模块接收跟踪条件, 并传输至设备管理模块, 设备管理模块 根据灯态跟踪模块传输来的跟踪条件生成需要跟踪的端口列表, 并将所述 端口列表返回灯态跟踪模块;
灯态跟踪模块根据端口列表向特定设备发送消息启动灯态跟踪任务。 所述系统还包括为所述灯态跟踪模块启动的跟踪任务的握手进行定时 的定时器, 所述定时器与灯态跟踪模块连接。
所述灯态跟踪模块包括计数器, 所述计数器在灯态跟踪模块向设备发 送握手消息时启动计数、 在灯态跟踪模块与设备握手失败时递增或递减、 在灯态跟踪模块与设备握手成功时复位; 所述灯态跟踪模块在计数器的计 数达到一定的值时停止灯态跟踪任务。
本发明还提供一种设备端口监控方法, 包括以下步骤:
(a) 灯态跟踪模块获取输入的跟踪特定端口的信息;
(b)灯态跟踪模块根据所述端口的信息生成跟踪指令并向特定设备发 送消息来启动灯态跟踪任务;
( c )所述灯态跟踪模块显示特定设备返回的特定端口的状态及端口的 状态改变;
(d) 所述灯态跟踪模块根据指令或网络状态停止灯态跟踪任务。 其中步骤 (a) 包括:
(al ) 灯态跟踪模块通过图形用户界面接收跟踪条件, 并将所述跟踪 条件传送到设备管理模块;
( a2) 设备管理模块根据所述跟踪条件生成对应端口的列表, 并将所 述列表返回灯态跟踪模块。
其中步骤 (b) 包括以下步骤:
(bl ) 灯态跟踪模块将跟踪任务加入跟踪任务列表;
(b2) 灯态跟踪模块执行灯态跟踪任务列表中的跟踪任务, 生成跟踪 指令并向特定设备发送消息来启动灯态跟踪;
(b3 ) 灯态跟踪模块启动定时器, 并根据定时器启动握手程序。
所述握手程序的步骤包括: 在灯态跟踪模块向设备发送握手消息时启 动计数器进行计数、在灯态跟踪模块与设备握手失败时计数器递增或递减、 在灯态跟踪模块与设备握手成功时计数器复位;
灯态跟踪模块在检测到计数器的计数达到一定的值时, 停止灯态跟踪 任务。
本发明的设备端口监控系统及方法, 通过使用动态注册跟踪任务, 降 低了端口监控的开销, 从而方便了端口的监控。 这样, 在端口数目极其庞 大的情况下, 能保证实时地跟踪的同时, 并能有效降低资源开销。 此外, 该系统还可在设备失效、 网管失效、 网络失效等异常情况下, 自动停止灯 态跟踪任务以便节约资源开销。 附图简要说明
图 1是本发明的设备端口监控系统的示意图;
图 2是本发明的设备端口监控方法的流程图;
图 3是本发明的设备端口监控方法中启动灯态跟踪流程的示意图; 图 4是本发明的设备端口监控方法中停止灯态跟踪流程的示意图; 图 5是本发明的设备端口监控方法中灯态变化报告流程的示意图; 图 6是本发明的设备端口监控方法中获取端口关联信息流程的示意图; 图 7是本发明的设备端口监控方法中灯态跟踪模块和设备间的正常握 手流程的示意图;
图 8是本发明的设备端口监控方法中灯态跟踪模块和设备间的握手异常 流程的示意图。
实施本发明的方式
如图 1所示, 是本发明的设备端口监控系统的示意图。 端口监控系统 10包括灯态跟踪模块 13、 业务信息管理模块 11、 设备管理模块 12、 实时 消息处理模块 14以及定时器 16, 其中业务信息管理模块 11、 设备管理模 块 12、实时消息处理模块 14以及定时器 16分别与灯态跟踪模块 13通信连 接。 此外, 灯态跟踪模块 13还与多个设备 20 (图 1中仅示出 1个)通信连 接, 该多个设备 20可以是地理上分散的。 每一设备 20可包括多个端口, 通过这些端口, 设备 20可连接不同的功能设备(例如接入设备、 终端设备 或其他设备), 从而实现这些功能设备的相互连接。
设备管理模块 12可根据跟踪条件生成符合条件的端口列表, 该模块可 通过检索端口数据库实现。灯态跟踪模块 13包括图形用户界面(GUI), 通 过该界面, 可接收跟踪条件 (例如指定跟踪特定框、 特定电话号码段的端 口等) 或启动 /停止灯态跟踪等命令; 该界面还可通过图标形式显示端口的 指示灯状态, 本实施例中以不同的颜色来显示指示灯不同的状态。 灯态跟 踪模块 13可将接收的跟踪条件传送到设备管理模块 12并根据从设备管理 模块 12返回的端口列表生成指令, 以向包含对应端口的特定设备发送消息 来启动或者停止灯态跟踪, 发送的消息可以根据用户的需要来确定, 如目 前通常采用的简单网络管理协议 (Simple Network Management Protocol, SNMP)消息等。 当然本发明也可以采用其他协议的消息来实现, 本发明不 限制消息采用的具体协议。 在下述实施例中本发明以简单网络管理协议为 例进行说明。 设备 20可根据接收到的 SNMP消息向灯态跟踪模块 13发送 对应端口的状态, 并建立任务列表, 在对应端口状态变化时向灯态跟踪模 块 13返回该端口变化。灯态跟踪模块 13与设备 20之间通过握手方式通信。
业务信息管理模块 11可检索特定端口的关联的详细信息, 例如端口对 应的电话号码、 配置的业务类型、 L3/EF地址、 终端类型、 终端 ID、 端口 名称等, 不同的端口类型对应的端口属性可能不同, 该模块可通过检索对 应业务的数据库来实现。实时消息处理模块 14可在某一端口的灯态变化时, 将该灯态变化通知灯态跟踪模块 13,从而灯态跟踪模块 13可更改对应端口 指示灯的颜色显示。 之所以要采用实时消息处理模块 14而不是灯态跟踪模 块 13直接接收 Trap是因为: 对于一个网管系统来说 trap的类型很多, 端 口状态变化 Trap只是其中一种, 对这些 Trap的接收 /解释 /分类 /派发用一个 统一的实时消息处理模块来处理会更简单高效。
灯态跟踪模块 13还包括计数器 (图中未示出), 该计数器在灯态跟踪 模块 13向设备发送 S MP消息时启动计数; 在灯态跟踪模块 13与设备 20 握手失败时加 1 ;在灯态跟踪模块 13与设备 20握手成功时清零。当灯态跟 踪模块 13检测到计数器的计数达到一定的值时(即握手失败超过指定的次 数), 停止对应的灯态跟踪任务, 将对应的跟踪任务从任务列表中删除。 因 为此时网络可能出现故障, 或对应设备 20出现故障。 定时器 16也与灯态 跟踪模块 13连接, 从而为灯态跟踪模块 13的多个跟踪任务的定时握手计 时。
上述的灯态跟踪模块 13、 业务信息管理模块 11、 设备管理模块 12、 实 时消息处理模块 14以及定时器 16, 其中业务信息管理模块 11、 设备管理 模块 12、实时消息处理模块 14分别可由硬件、软件或硬件和软件的结合实 现。
如图 2所示, 是本发明的设备端口监控方法的流程图。 首先灯态跟踪 模块 13通过图形用户界面接收跟踪条件的输入并将该条件传送到设备管理 模块 12 (步骤 S211 ), 设备管理模块 12根据跟踪条件生成待跟踪端口列表 并将该列表返回灯态跟踪模块 13 (步骤 S212)。 灯态跟踪模块 13根据返回 的端口列表生成指令, 以向包含对应端口的特定设备发送 S MP来启动灯 态跟踪 (步骤 S213 )。 同时灯态跟踪模块 13启动定时器并将跟踪任务加入 任务列表, 通过任务列表, 可同时启动多个跟踪任务 (步骤 S214)。
灯态跟踪模块 13接收来自设备 20的包含对应端口状态的消息, 该消 息可以是 SNMP消息 (步骤 S215 ), 灯态跟踪模块 13可将这些端口的状态 在图形用户界面上以对应的图标来显示, 通过不同的图标颜色来表示端口 的不同状态(步骤 S216)。
设备 20还根据从灯态跟踪模块 13接收的 SNMP消息生成自己的任务 列表, 并在对应端口状态改变时向灯态跟踪模块 13发送灯态变化 Trap。 当 灯态跟踪模块 13接收到来自设备的消息时,判断是否为端口状态变化 Trap (步骤 S217)。 若收到端口状态变化 Tmp, 则灯态跟踪模块 13刷新图形用 户界面上对应端口的状态显示 (步骤 S218), 并返回步骤 S216。 此外, 定 时器 16还定时检测并判断是否启动灯态跟踪模块 13与设备 20之间的握手 程序(步骤 S219)。该握手程序可以根据指定的条件来启动。例如: 指定条 件可以为跟踪指定框的端口状态; 跟踪指定电话号码段的端口状态; 只 跟踪 psto端口的状态; 或者它们之间的组合等。 若握手定时器时间发生, 则灯态跟踪模块 13向设备 20发出握手信息 (步骤 S220), 否则返回步骤 S216。 如果握手成功, 即灯态跟踪模块 13接收到设备 20返回的响应, 则 将计数器清零(步骤 S222), 并返回步骤 S216。 若灯态跟踪模块 13在指定 时间内未接收到来自设备的响应, 则将计数器加 1, 并再次发送握手信息。 灯态跟踪模块 13检测计数器的计数是否超过预定值(步骤 S223)。 若超过 预定值, 则表示网络有可能故障, 停止该灯态跟踪任务, 将任务从跟踪列 表删除, 并清除图形用户界面上的灯态显示(步骤 S224)。若计数器的值未 超过预定值, 则返回步骤 S220。
还可通过业务信息管理模块 11来获取跟踪端口关联的详细信息 (图 2 中未示出), 例如某个端口的对应的电话号码、 配置的业务类型、 L3/EF地 址、 终端类型、 终端 ID、 端口名称等。
此外, 灯态跟踪模块 13还可通过主动轮询设备端口状态的方式实现对 应端口状态的获取。 轮询的时间间隔可根据需要来设定, 但是如果轮询时 间间隔长(如几秒钟一次), 则实时性不能保证; 如果轮询时间间隔过短, 则导致网管严重的性能问题, 设备和网管可能无法正常工作。
如图 3所示, 是本发明的设备端口监控方法中启动灯态跟踪流程的示 意图。 首先灯态跟踪模块 13通过图形用户界面 (GUI) 接收启动跟踪的过 滤条件(如启动某个设备某个框的端口跟踪), 发出启动灯态跟踪命令。 灯 态跟踪模块 13 向设备管理模块 12获取满足指定条件的端口列表。 灯态跟 踪模块 13向设备 20发出 SNMP消息, 启动满足指定条件的端口的状态跟 踪。设备 20建立自己的任务列表,并用 Trap报告所有满足指定条件端口的 当前状态。 同时灯态跟踪模块 13启动握手定时器, 添加跟踪任务到跟踪任 务列表中。 灯态跟踪模块 13在图形用户界面中显示跟踪的端口列表, 并用 不同颜色的图标显示对应端口的当前状态。
图 4是本发明的设备端口监控方法中停止灯态跟踪流程的示意图。 首 先灯态跟踪模块 13通过图形用户界面接收停止灯态跟踪的命令。灯态跟踪 模块 13向设备 20发出停止灯态跟踪命令。 设备 20停止对对应端口状态的 跟踪, 即使端口状态发生变化, 也不会往网管发送 Tmp。 灯态跟踪模块 13 停止握手定时器, 删除跟踪任务列表中对应项。 灯态跟踪模块 13清除相关 界面显示。
图 5是本发明的设备端口监控方法中灯态变化报告流程的示意图。 设 备 20检测到被跟踪的端口状态有变化, 并将该状态变化发送到灯态跟踪模 块 13。 实时消息处理模块 14通知灯态跟踪模块 13 : 有端口状态发生变化。 灯态跟踪模块 13更新界面, 用指定颜色的图标表示对应端口当前状态。
图 6是本发明的设备端口监控方法中获取端口关联信息流程的示意图。 可通过在灯态跟踪模块 13中的图形用户界面上单击某个端口状态灯图标, 以指示获取该端口关联的详细信息。灯态跟踪模块 13向业务信息管理模块 11发出获取指定端口的详细信息的命令。业务信息管理模块 11向灯态跟踪 模块 13返回对应端口详细信息。 灯态跟踪模块 13在图形用户界面上显示 该端口的详细信息。
图 7、图 8是本发明的设备端口监控方法中灯态跟踪模块和设备间的握 手流程的示意图。 灯态跟踪模块 13中设置的定时器周期性事件发生时, 灯 态跟踪模块 13向设备 20发出 SNMP消息,启动握手程序。如果设备 20返 回握手成功响应, 灯态跟踪模块 13将计数器清零; 如果设备 20在指定的 超时时间内没有响应, 则灯态跟踪模块 13将计数器加 1。 如果握手失败次 数超过事先约定的次数,则认为跟踪任务异常中断(例如出现网络故障等), 灯态跟踪模块 13停止握手定时器、 删除跟踪任务列表中对应项、 清除对应 的界面显示。若设备 20对于已经启动跟踪的任务,如果在指定的时间内(>= 网管侧握手超时时间 X最大允许失败次数)没有收到灯态跟踪模块 13发来 的握手信息, 则认为跟踪命令已经失效, 设备 20停止灯态跟踪任务, 不再 向灯态跟踪模块 13发送对应端口状态变化的 Trap。

Claims

权利要求
1、 一种设备端口监控系统, 其特征在于, 包括与各个物理上分散的设 备分别通信连接的灯态跟踪模块, 所述灯态跟踪模块根据输入的跟踪特定 端口的信息生成跟踪指令, 灯态跟踪模块向特定设备发送消息启动灯态跟 踪任务, 并显示所述特定设备返回的特定端口的状态, 所述灯态跟踪模块 还接收并显示特定端口的状态改变, 所述灯态跟踪模块还根据指令或网络 状态来停止灯态跟踪任务。
2、 根据权利要求 1所述的设备端口监控系统, 其特征在于, 还包括与 所述灯态跟踪模块通信连接、 并将端口的状态变化转换为灯态跟踪模块可 识别信息、 实时地传送到所述灯态跟踪模块显示的实时消息处理模块。
3、根据权利要求 1所述的设备端口监控系统, 其特征在于, 还包括与 所述灯态跟踪模块通信连接的业务信息管理模块, 所述业务信息管理模块 根据灯态跟踪模块接收的端口状态, 获取对应端口的关联信息, 并传输至 灯态跟踪模块, 由灯态跟踪模块显示对应端口的关联信息。
4、 根据权利要求 1所述的设备端口监控系统, 其特征在于, 还包括与 所述灯态跟踪模块连接的设备管理模块;
灯态跟踪模块接收跟踪条件, 并传输至设备管理模块, 设备管理模块 根据灯态跟踪模块传输来的跟踪条件生成需要跟踪的端口列表, 并将所述 端口列表返回灯态跟踪模块;
灯态跟踪模块根据端口列表向特定设备发送消息启动灯态跟踪任务。
5、 根据权利要求 1或 2或 3或 4所述的设备端口监控系统, 其特征在 于, 还包括为所述灯态跟踪模块启动的跟踪任务的握手进行定时的定时器, 所述定时器与灯态跟踪模块连接。
6、 根据权利要求 5所述的设备端口监控系统, 其特征在于, 所述灯态 跟踪模块包括计数器, 所述计数器在灯态跟踪模块向设备发送握手消息时 启动计数、 在灯态跟踪模块与设备握手失败时递增或递减、 在灯态跟踪模 块与设备握手成功时复位; 所述灯态跟踪模块在计数器的计数达到一定的 值时停止灯态跟踪任务。
7、 一种设备端口监控方法, 其特征在于, 包括以下步骤:
(a) 灯态跟踪模块获取输入的跟踪特定端口的信息;
(b)灯态跟踪模块根据所述端口的信息生成跟踪指令并向特定设备发 送消息来启动灯态跟踪任务;
(c)所述灯态跟踪模块显示特定设备返回的特定端口的状态及端口的 状态改变;
( d ) 所述灯态跟踪模块根据指令或网络状态停止灯态跟踪任务。
8、 根据权利要求 7所述的设备端口监控方法, 其特征在于, 其中步骤
(a) 包括:
(al ) 灯态跟踪模块通过图形用户界面接收跟踪条件, 并将所述跟踪 条件传送到设备管理模块;
(a2) 设备管理模块根据所述跟踪条件生成对应端口的列表, 并将所 述列表返回灯态跟踪模块。
9、 根据权利要求 7所述的设备端口监控方法, 其特征在于, 其中步骤
(b) 包括以下步骤:
(M ) 灯态跟踪模块将跟踪任务加入跟踪任务列表;
(b2) 灯态跟踪模块执行灯态跟踪任务列表中的跟踪任务, 生成跟踪 指令并向特定设备发送消息来启动灯态跟踪;
(b3 ) 灯态跟踪模块启动定时器, 并根据定时器启动握手程序。
10、 根据权利要求 9所述的设备端口监控方法, 其特征在于, 所述握 手程序的步骤包括: 在灯态跟踪模块向设备发送握手消息时启动计数器进 行计数、 在灯态跟踪模块与设备握手失败时计数器递增或递减、 在灯态跟 踪模块与设备握手成功时计数器复位;
灯态跟踪模块检测到计数器的计数达到一定值时, 停止灯态跟踪任务。
PCT/CN2006/001603 2005-07-08 2006-07-07 Systeme et procede de surveillance de l'etat d'un port de dispositif WO2007006214A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CNA2006800121993A CN101160818A (zh) 2005-07-08 2006-07-07 设备端口监控系统及方法
DE602006010063T DE602006010063D1 (de) 2005-07-08 2006-07-07 System und verfahren zur überwachung des zustandes eines geräteports
EP06753119A EP1890427B1 (en) 2005-07-08 2006-07-07 A system and method for monitoring the device port state
AT06753119T ATE447273T1 (de) 2005-07-08 2006-07-07 System und verfahren zur überwachung des zustandes eines geräteports
US11/967,833 US20080104285A1 (en) 2005-07-08 2007-12-31 Method and system for monitoring device port

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2005100359157A CN1852129A (zh) 2005-07-08 2005-07-08 设备端口监控系统及方法
CN200510035915.7 2005-07-08

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/967,833 Continuation US20080104285A1 (en) 2005-07-08 2007-12-31 Method and system for monitoring device port

Publications (1)

Publication Number Publication Date
WO2007006214A1 true WO2007006214A1 (fr) 2007-01-18

Family

ID=37133599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/001603 WO2007006214A1 (fr) 2005-07-08 2006-07-07 Systeme et procede de surveillance de l'etat d'un port de dispositif

Country Status (7)

Country Link
US (1) US20080104285A1 (zh)
EP (1) EP1890427B1 (zh)
CN (2) CN1852129A (zh)
AT (1) ATE447273T1 (zh)
DE (1) DE602006010063D1 (zh)
ES (1) ES2333361T3 (zh)
WO (1) WO2007006214A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101364878B (zh) * 2007-08-10 2011-01-26 海华科技股份有限公司 自动监控网络连接端口的方法及系统
CN104750462A (zh) * 2013-12-25 2015-07-01 北京北方微电子基地设备工艺研究中心有限责任公司 半导体制造设备的状态控制系统及方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120290707A1 (en) * 2011-05-10 2012-11-15 Monolith Technology Services, Inc. System and method for unified polling of networked devices and services
CN103675497A (zh) * 2012-09-18 2014-03-26 英业达科技有限公司 电子装置检测时的电子装置定位系统及其方法
CN103795632B (zh) * 2012-10-31 2017-02-22 华为技术有限公司 一种数据报文传输方法及相关设备、系统
US20140143864A1 (en) 2012-11-21 2014-05-22 Snoopwall Llc System and method for detecting, alerting and blocking data leakage, eavesdropping and spyware
US9325595B1 (en) 2013-03-14 2016-04-26 Emc Corporation Method and apparatus for identifying available work stations
US9208349B1 (en) 2015-01-13 2015-12-08 Snoopwall, Inc. Securing data gathering devices of a personal computing device while performing sensitive data gathering activities to prevent the misappropriation of personal user data gathered therewith
TWI521826B (zh) * 2015-02-04 2016-02-11 碩天科技股份有限公司 具有插座辨識功能的電源設備及電源設備的插座辨識方法
US20160378630A1 (en) * 2015-06-25 2016-12-29 Dell Products L.P. Port monitoring system
US10684906B2 (en) * 2016-06-15 2020-06-16 Microsoft Technology Licensing, Llc Monitoring peripheral transactions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1148921A (zh) * 1994-05-25 1997-04-30 诺基亚电信公司 监控互连网络状态的方法
CN1512712A (zh) * 2002-12-28 2004-07-14 鸿富锦精密工业(深圳)有限公司 网络设备状态显示系统及方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5825775A (en) * 1994-11-14 1998-10-20 Bay Networks, Inc. Method and apparatus for managing an integrated router/hub
JP3783501B2 (ja) * 2000-01-07 2006-06-07 富士ゼロックス株式会社 トラップ制御システム
GB2369911B (en) * 2000-12-11 2002-10-23 3Com Corp Methods and apparatus for updating information in a display containing fixed and variable information
US7302455B1 (en) * 2002-02-26 2007-11-27 At&T Bls Intellectual Property, Inc. System and method for reliably purging statistical records
US20040122944A1 (en) * 2002-06-28 2004-06-24 Didier Poirot Method and system of locating computers in distributed computer system
US7257080B2 (en) * 2002-12-09 2007-08-14 Lsi Corporation Dynamic traffic-based packet analysis for flow control
US7613803B2 (en) * 2003-06-09 2009-11-03 Lockheed Martin Corporation Middle-ware interface status tool and method for using same
EP1810522A1 (en) * 2004-11-03 2007-07-25 Panduit Corp. Method and apparatus for patch panel patch cord documentation and revision

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1148921A (zh) * 1994-05-25 1997-04-30 诺基亚电信公司 监控互连网络状态的方法
CN1512712A (zh) * 2002-12-28 2004-07-14 鸿富锦精密工业(深圳)有限公司 网络设备状态显示系统及方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101364878B (zh) * 2007-08-10 2011-01-26 海华科技股份有限公司 自动监控网络连接端口的方法及系统
CN104750462A (zh) * 2013-12-25 2015-07-01 北京北方微电子基地设备工艺研究中心有限责任公司 半导体制造设备的状态控制系统及方法

Also Published As

Publication number Publication date
US20080104285A1 (en) 2008-05-01
ATE447273T1 (de) 2009-11-15
CN1852129A (zh) 2006-10-25
EP1890427B1 (en) 2009-10-28
CN101160818A (zh) 2008-04-09
DE602006010063D1 (de) 2009-12-10
ES2333361T3 (es) 2010-02-19
EP1890427A1 (en) 2008-02-20
EP1890427A4 (en) 2008-07-23

Similar Documents

Publication Publication Date Title
WO2007006214A1 (fr) Systeme et procede de surveillance de l'etat d'un port de dispositif
US7130899B1 (en) Robust indication processing
US6651190B1 (en) Independent remote computer maintenance device
RU2471301C2 (ru) Функционирование сетевых субъектов в системе связи, содержащей сеть управления с уровнями агентов и управления
US20040008727A1 (en) Network resource management in a network device
WO2008020721A1 (en) Element management system in wireless communication network
EP0818096A1 (en) Method and apparatus for policy-based alarm notification in a distributed network management environment
EP1734694A1 (en) Redundancy group status management apparatus and methods
WO2009006834A1 (fr) Procédé de gestion d'élément de réseau, système de gestion d'équipement d'élément de réseau et système de gestion d'élément de réseau
CN102263651A (zh) Snmp网络管理系统中局端设备连接状态的检测方法
JP2013130901A (ja) 監視サーバおよびそれを用いたネットワーク機器復旧システム
KR100285952B1 (ko) 비대칭가입자라인전송시스템의시스템유지보수장치
CN113676723A (zh) 一种基于物联网的非同源网络视频监控故障定位方法及装置
CN109286525A (zh) 一种基于mqtt通讯和主备之间心跳的双机备份方法
EP1622310A2 (en) Administration system for network management systems
JP2008306435A (ja) パケット中継装置
EP1079566A2 (en) System management in a communications network comprising SNMP and CMIP agents
Cisco CLI reference
Cisco Glossary
Cisco Chapter 1: How to Use This Guide
Cisco Glossary
Cisco Monitoring the System
Lappanitchayakul Development of email and sms based notification system to detect abnormal network conditions: A case study of faculty of business administration, rajamangala university of technology phra nakhon, thailand
US6973044B1 (en) Efficient method for collecting statistics via a half-duplex serial bus
JPH09282252A (ja) ネットワーク管理方式

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 200680012199.3

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 11967833

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2006753119

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

WWP Wipo information: published in national office

Ref document number: 2006753119

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 11967833

Country of ref document: US