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    Loop avoidance and egress link protection with ethernet virtual private network (EVPN) fast reroute (FRR)
    1.
    发明授权
    Loop avoidance and egress link protection with ethernet virtual private network (EVPN) fast reroute (FRR) 有权

    公开(公告)号：US11057295B1

    公开(公告)日：2021-07-06

    申请号：US16777526

    申请日：2020-01-30

    Applicant: Juniper Networks, Inc.

    Inventor： Wen Lin ,  Yi Zheng ,  SelvaKumar Sivaraj ,  Vasudevan Venkatraman ,  Prabhu Raj V. K. ,  Channasangamesh S. Hugar

    IPC: H04L12/729 ,  H04L12/707 ,  H04L12/723 ,  H04L12/717 ,  H04L12/46 ,  H04L29/06

    Abstract: The problem of looping at the egress of a transport network with a CE multihomed to a protected egress PE and a backup/protector egress PE can be avoided by (a) enabling the protector egress PE to distinguish between fast reroute (FRR) traffic coming from the protected egress PE and normal known unicast (KU) traffic coming from a PE of the transport network that is not attached to the same multihomed segment; (b) receiving, by the protector egress PE, known unicast data, to be forwarded to the CE; (c) determining, by the protector egress PE, that a link between it and the CE is unavailable; and (d) responsive to determining that the link between the protector egress PE and the CE is unavailable, (1) determining whether the known unicast traffic received was sent from the protected egress PE or from another PE of the transport network that is not attached to the same multihomed segment, and (2) responsive to a determination that the known unicast traffic received was sent from the protected egress PE, discarding the known unicast traffic received, and otherwise, responsive to a determination that the known unicast (KU) traffic received was sent from another PE of the transport network that is not attached to the same multihomed segment, sending the known unicast traffic, via a backup tunnel, to an egress PE which protects the protector egress PE.

    Symmetric path/link over LAG interface using LLDP for time synchronization between two nodes using PTP
    2.
    发明授权
    Symmetric path/link over LAG interface using LLDP for time synchronization between two nodes using PTP 有权

    公开(公告)号：US10887037B2

    公开(公告)日：2021-01-05

    申请号：US15982901

    申请日：2018-05-17

    Applicant: Juniper Networks, Inc.

    Inventor： Prabhu Raj V. K. ,  Kamatchi S. Gopalakrishnan ,  M. Ramana Reddy

    IPC: H04L12/24 ,  H04J3/06 ,  H04L12/709 ,  H04L12/851

    Abstract: A network device may assign, to a port of a plurality of ports on the network device, a precision timing protocol (PTP) port priority for PTP communications between the network device and another network device. The network device and the other network device may be communicatively connected via a plurality of links in a link aggregation group (LAG). Each port, of the plurality of ports, may be associated with a respective link, of the plurality of links, in the LAG. The network device may generate a link layer discovery protocol (LLDP) frame that includes information identifying the PTP port priority assigned to the port. The network device may transmit the LLDP frame to the other network device to identify, to the other network device, the PTP port priority.

    Service status notification
    4.
    发明授权
    Service status notification 有权

    公开(公告)号：US11570073B1

    公开(公告)日：2023-01-31

    申请号：US16691083

    申请日：2019-11-21

    Applicant: Juniper Networks, Inc.

    Inventor： Pankaj Kumar ,  Prabhu Raj V. K.

    IPC: H04L43/0805 ,  H04L12/46 ,  H04L9/40 ,  H04L69/324

    Abstract: A provider edge (PE) device may receive traffic associated with one or more services, wherein the traffic includes a plurality of packets, and may determine, based on the plurality of packets, one or more packets respectively associated with each service of the one or more services. The PE device may determine, based on the one or more packets respectively associated with each service of the one or more services, a respective status of each of the one or more services. The PE device may generate type-length-value (TLV) data that indicates the respective status of each of the one or more services and may cause the TLV data to be added to a link layer discovery protocol (LLDP) packet. The PE device may send the LLDP packet that includes the added TLV data to a customer edge (CE) device.

    Deadlock avoidance using modified ethernet connectivity fault management signaling
    6.
    发明授权
    Deadlock avoidance using modified ethernet connectivity fault management signaling 有权

    公开(公告)号：US10193746B2

    公开(公告)日：2019-01-29

    申请号：US15387315

    申请日：2016-12-21

    Applicant: Juniper Networks, Inc.

    Inventor： Vamsi Krishna A ,  Sudheendra Bellamkonda ,  Paleti Venkata Ramana ,  Prabhu Raj V. K. ,  Viswanath K J

    IPC: H04L12/24 ,  H04L12/26

    Abstract: A first maintenance endpoint (MEP) device may identify that a first interface of the first MEP device is associated with a connectivity failure. The first MEP device may provide, to a second MEP device, a first continuity check message (CCM), that includes a MEP identifier of the first MEP device. The first CCM may cause the second MEP device to designate a second interface of the second MEP device as being offline. The first MEP device may receive, from the second MEP device, a second CCM, that includes the MEP identifier of the first MEP device and information indicating that the second interface of the second MEP device is offline. The first MEP device may execute a rule to avoid a deadlock situation based on the second CCM including the MEP identifier of the first MEP device.

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