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    Fast re-route for optical networks
    32.
    发明授权
    Fast re-route for optical networks 有权

    公开(公告)号：US09264131B1

    公开(公告)日：2016-02-16

    申请号：US14616447

    申请日：2015-02-06

    Applicant: Juniper Networks, Inc.

    Inventor： Gert Grammel

    IPC: H04L12/06 ,  H04L12/28 ,  H04B10/038

    CPC classification number: H04B10/038 ,  H04L12/6418

    Abstract: An optical network device re-routes traffic from a path to a backup path in response to determining that a downstream segment of the primary path is not operational. The optical network device receives traffic on a slot of an optical fiber. For each data unit in the traffic, the optical network device determines, based on receiving the data unit on the slot and based on a flow identifier specified in the data unit, that a given path is associated with the data unit. If a downstream segment of the given path is not operational, the optical network device routes the data unit onto a backup path instead of routing the data unit along the given path. Bandwidth is not reserved for the backup path.

    Connectivity protocol delegation
    33.
    发明授权
    Connectivity protocol delegation 有权
    连接协议委托

    公开(公告)号：US09185170B1

    公开(公告)日：2015-11-10

    申请号：US13732126

    申请日：2012-12-31

    Applicant: Juniper Networks, Inc.

    Inventor： Gert Grammel ,  Chien Yu Li ,  Theodore X. Qian

    IPC: H04L12/26 ,  H04L29/08

    CPC classification number: H04L43/0811 ,  H04L43/06 ,  H04L43/0829 ,  H04L43/10 ,  H04L45/026 ,  H04L67/141 ,  H04L67/142 ,  H04L67/145 ,  H04L67/2861 ,  H04L67/42

    Abstract: In general, techniques are described for delegating responsibility for performing a connectivity protocol from one or more endpoint devices to network infrastructure situated along a network forwarding path connecting the endpoint devices. In some examples, an intermediate network device includes a connectivity protocol module of control unit that operates a connectivity protocol session on behalf of a server, wherein the server exchanges application data with the client using an application-layer communication session with the client. The connectivity protocol module monitors connectivity for the application-layer communication session with the connectivity protocol session by exchanging connectivity protocol messages for the connectivity protocol session with the client to determine a connectivity status for the communication session. The connectivity protocol module updates the server with the connectivity status for the communication session by sending a summary report message that includes the connectivity status for the communication session to the server.

    Abstract translation: 一般来说，描述了将执行连接协议的责任从一个或多个端点设备委托给沿着连接端点设备的网络转发路径定位的网络基础设施的技术。 在一些示例中，中间网络设备包括代表服务器操作连接协议会话的控制单元的连接性协议模块，其中服务器使用与客户端的应用层通信会话与客户端交换应用数据。 连接协议模块通过交换与客户端的连接协议会话的连接协议消息来监视与连接协议会话的应用层通信会话的连接，以确定通信会话的连接状态。 连接协议模块通过发送包含通信会话到服务器的连接状态的摘要报告消息来更新具有通信会话的连接状态的服务器。

    Error handling for media access control security
    37.
    发明授权
    Error handling for media access control security 有权

    公开(公告)号：US11336647B2

    公开(公告)日：2022-05-17

    申请号：US17038222

    申请日：2020-09-30

    Applicant: Juniper Networks, Inc.

    Inventor： Manish Talwar ,  Ajay Kachrani ,  Gert Grammel ,  Hao Wang ,  Tanweer Biswas

    IPC: H04L29/06 ,  H04L65/1069 ,  H04L101/622 ,  H04L41/0604 ,  H04L45/00 ,  H04L43/16

    Abstract: Embodiments improve error detection and recovery in media access control security sessions. A MACsec session is torn down after three liveness time intervals elapse without receiving a MACsec key exchange protocol data unit (MKPDU) from a remote peer. This delay between a cessation of effective network communication over the MACsec session and the expiration of the three “liveness” intervals results in increased packet loss and an increased network convergence time as a network continues to route/forward data over the MACsec session for a period of time after the MACsec session has entered secure block mode. To solve this problem, embodiments define a new alarm, called a MACsec link alert, which is raised earlier than a MACsec session timeout generated by traditional embodiments. The MACsec link alert is raised, by at least some embodiments, after a failure to successfully receive an MKPDU from the remote peer after a single MACsec “liveness” timeout interval elapses.

    HYPOTHESIS DRIVEN DIAGNOSIS OF NETWORK SYSTEMS
    38.
    发明申请
    HYPOTHESIS DRIVEN DIAGNOSIS OF NETWORK SYSTEMS 有权

    公开(公告)号：US20220103417A1

    公开(公告)日：2022-03-31

    申请号：US17032799

    申请日：2020-09-25

    Applicant: Juniper Networks, Inc.

    Inventor： Gert Grammel ,  Jayanthi R ,  Chandrasekhar A

    IPC: H04L12/24

    Abstract: An example method includes obtaining, by one or more processors, data indicating resource dependencies between a plurality of resources in a network and event dependencies between a plurality of network events and one or more of the plurality of resources; generating a Bayesian model based on resource types of the plurality of resources and event types of the plurality of network events; receiving an indication of a fault in the network; collecting fault data and generating, based on the Bayesian model and the fault data, a plurality of root cause hypotheses for the fault; ordering the plurality of root cause hypotheses based on respective root cause probabilities associated with the plurality of root cause hypotheses; and outputting the ordered plurality of root cause hypotheses.

    Detecting a transceiver using a noise optical signal
    39.
    发明授权
    Detecting a transceiver using a noise optical signal 有权

    公开(公告)号：US10797791B2

    公开(公告)日：2020-10-06

    申请号：US16718715

    申请日：2019-12-18

    Applicant: Juniper Networks, Inc.

    Inventor： Massimiliano Salsi ,  Domenico Di Mola ,  Gert Grammel

    IPC: H04J14/00 ,  H04B10/077 ,  H04B10/572

    Abstract: A method may include causing a signal to be transmitted that includes a plurality of wavelengths. The signal may be transmitted via an optical fiber that is associated with a particular wavelength. The particular wavelength may be included in the plurality of wavelengths. The method may include filtering the signal, based on the particular wavelength, to generate a filtered signal. The filtered signal may include the particular wavelength. The method may include detecting the filtered signal in association with the optical fiber. The method may include determining the particular wavelength based on the filtered signal. The method may include storing or providing information identifying at least one of the particular wavelength, the optical fiber, or a transmitter that transmitted the signal.

    Confidence level information for network alarms
    40.
    发明授权
    Confidence level information for network alarms 有权

    公开(公告)号：US09838248B1

    公开(公告)日：2017-12-05

    申请号：US14575786

    申请日：2014-12-18

    Applicant: Juniper Networks, Inc.

    Inventor： Gert Grammel ,  Hans-Juergen W. Schmidtke

    IPC: H04L12/26 ,  H04L12/24

    CPC classification number: H04L41/0681 ,  H04L41/0627 ,  H04L41/0645 ,  H04L41/0686

    Abstract: The disclosure describes techniques that enable a network device to determine a confidence level for a network alarm and provide information indicative of the confidence level to other devices. For example, a network device may experience any number of conditions that cause the network device to output an alarm. In addition to or instead of simply sending out the alarm, the network device may perform operations to determine a confidence level associated with the alarm. For instance, the network device may determine whether the conditions that caused the alarm continue or whether the conditions can be validated. The network device may output information indicative of the confidence level.

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