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    Avoiding data traffic loss in a ring multihomed, in an active-standby manner, to a transport network
    1.
    发明授权
    Avoiding data traffic loss in a ring multihomed, in an active-standby manner, to a transport network 有权

    公开(公告)号：US09979632B2

    公开(公告)日：2018-05-22

    申请号：US15000803

    申请日：2016-01-19

    Applicant: Juniper Networks, Inc.

    Inventor： Pankaj Shukla ,  Sunesh Rustagi

    IPC: H04L12/707 ,  H04L12/721 ,  H04L12/715 ,  H04L12/703 ,  H04L12/723 ,  H04L12/437 ,  H04L12/46

    CPC classification number: H04L45/22 ,  H04L12/437 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/28 ,  H04L45/50 ,  H04L45/66

    Abstract: Data traffic loss in a an Ethernet Ring that is multihomed, in an active-standby manner, to a VPLS transport network (such as a Border Gateway Protocol (BGP) multihomed Ethernet Ring, an MC-LAG multihomed Ethernet Ring, or some other type of active-standby multihomed Ethernet Ring, etc.) (ring) is avoided. The exemplary multihomed ring running Ethernet Ring Protection (ERP) protocol includes a Ring Protection Link (RPL), a first node and a second node linked with a designated border router and a standby border router of the network, respectively. The data traffic loss in the multihomed ring is avoided by (i) receiving an indication that the link between the first node and the designated border router has failed; and (ii) invoking, responsive to the received indication, an ERP Media Access Control (MAC)-flush in the ring, even in the absence of a failed link in the ring and without activating the specified RPL. The ERP MAC-flush causes subsequent data packets from each of the plurality of nodes in the ring to be forwarded to the standby border router via the second node.

    AVOIDING DATA TRAFFIC LOSS IN A RING MULTIHOMED, IN AN ACTIVE-STANDBY MANNER, TO A TRANSPORT NETWORK
    3.
    发明申请
    AVOIDING DATA TRAFFIC LOSS IN A RING MULTIHOMED, IN AN ACTIVE-STANDBY MANNER, TO A TRANSPORT NETWORK 有权
    避免数据传输损失多环节，主动式待机，传输网络

    公开(公告)号：US20160134517A1

    公开(公告)日：2016-05-12

    申请号：US15000803

    申请日：2016-01-19

    Applicant: Juniper Networks, Inc.

    Inventor： Pankaj Shukla ,  Sunesh Rustagi

    IPC: H04L12/707 ,  H04L12/46 ,  H04L12/437 ,  H04L12/723 ,  H04L12/721

    CPC classification number: H04L45/22 ,  H04L12/437 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/28 ,  H04L45/50 ,  H04L45/66

    Abstract: Data traffic loss in a an Ethernet Ring that is multihomed, in an active-standby manner, to a VPLS transport network (such as a Border Gateway Protocol (BGP) multihomed Ethernet Ring, an MC-LAG multihomed Ethernet Ring, or some other type of active-standby multihomed Ethernet Ring, etc.) (ring) is avoided. The exemplary multihomed ring running Ethernet Ring Protection (ERP) protocol includes a Ring Protection Link (RPL), a first node and a second node linked with a designated border router and a standby border router of the network, respectively. The data traffic loss in the multihomed ring is avoided by (i) receiving an indication that the link between the first node and the designated border router has failed; and (ii) invoking, responsive to the received indication, an ERP Media Access Control (MAC)-flush in the ring, even in the absence of a failed link in the ring and without activating the specified RPL. The ERP MAC-flush causes subsequent data packets from each of the plurality of nodes in the ring to be forwarded to the standby border router via the second node.

    Abstract translation: 以主动备用方式多呼叫到VPLS传输网络（例如边界网关协议（BGP）多宿主以太网环，MC-LAG多宿主以太网环或其他类型的以太网环路中的数据流量丢失 主动待机多宿主以太网环等）（环）。 运行以太环网保护（ERP）协议的示例性多主机环路分别包括与指定的边界路由器和网络的备用边界路由器链接的环保护链路（RPL），第一节点和第二节点。 通过（i）接收到第一节点和指定的边界路由器之间的链路已经失败的指示来避免多主环中的数据业务丢失; 以及（ii）响应于所接收的指示，调用在环中的ERP媒体访问控制（MAC）冲洗，即使在环中没有故障链路并且不激活指定的RPL。 ERP MAC刷新使来自环中的多个节点的后续数据分组经由第二节点转发到备用边界路由器。

    FAILURE HANDLING FOR ACTIVE-STANDBY REDUNDANCY IN EVPN DATA CENTER INTERCONNECT
    5.
    发明申请
    FAILURE HANDLING FOR ACTIVE-STANDBY REDUNDANCY IN EVPN DATA CENTER INTERCONNECT 审中-公开

    公开(公告)号：US20170288948A1

    公开(公告)日：2017-10-05

    申请号：US15085533

    申请日：2016-03-30

    Applicant: Juniper Networks, Inc.

    Inventor： Tapraj Singh ,  Wen Lin ,  SelvaKumar Sivaraj ,  Rukesh Dorai ,  Sunesh Rustagi

    IPC: H04L12/24 ,  H04L12/703 ,  H04L12/721 ,  H04L12/723 ,  H04L12/741

    Abstract: Techniques are described for avoiding traffic black-holing in a multi-homed Ethernet virtual private networks (EVPNs) in which a customer device (CE) is multi-homed to a plurality of multi-homing provider edge devices (PEs) via respective links of an Ethernet segment. An overlay network is created over the Ethernet segment, and the multi-homing PEs of the EVPN are configured with a common anycast IP address for respective virtual network interfaces. Upon election as active designated forwarder (DF) for the EVPN, the DF PE of the multi-homing PEs advertises toward the customer network an IGP metric for the anycast IP address that is lower than the IGP metric(s) advertised by any of the non-DF standby PE routers segment to direct the CE to forward network packets from the customer network to the DF PE over the respective link of the Ethernet segment.

    OAM MECHANISMS FOR EVPN ACTIVE-ACTIVE SERVICES
    6.
    发明申请
    OAM MECHANISMS FOR EVPN ACTIVE-ACTIVE SERVICES 审中-公开

    公开(公告)号：US20170195199A1

    公开(公告)日：2017-07-06

    申请号：US14984026

    申请日：2015-12-30

    Applicant: Juniper Networks, Inc.

    Inventor： Rukesh Dorai ,  Tapraj Singh ,  Sunesh Rustagi

    IPC: H04L12/26 ,  H04L12/761 ,  H04L12/46

    CPC classification number: H04L43/0811 ,  H04L12/4641 ,  H04L41/0213 ,  H04L41/0645 ,  H04L41/0663 ,  H04L41/0813 ,  H04L45/16 ,  H04L45/22 ,  H04L45/24 ,  H04L45/28

    Abstract: A method and network device to execute an Ethernet Virtual Private Network (EVPN) protocol to configure the network device to participate as one of a plurality of customer edge (CE) routers that provide an active-active configuration for an Ethernet segment coupling the CE routers to a plurality of provider edge (PE) routers, wherein the processor is configured to determine whether a packet that is to be forwarded is an operations, administration, and management (OAM) packet; in response to determining that the packet comprises an OAM packet, replicate the OAM packet for one or more interface links of an Ethernet segment associated with the CE router; configure forwarding instructions to the one or more interface links of the Ethernet segment associated with the CE router; and forward the OAM packet and the replicated OAM packets to the PE routers.

    Designated forwarder election for multi-homed data center interconnect using multicast routing protocol state information
    8.
    发明授权
    Designated forwarder election for multi-homed data center interconnect using multicast routing protocol state information 有权

    公开(公告)号：US09628409B1

    公开(公告)日：2017-04-18

    申请号：US14644683

    申请日：2015-03-11

    Applicant: Juniper Networks, Inc.

    Inventor： Venkatesan Yuvaraj ,  Sunesh Rustagi ,  Shrinivasa Kini ,  Tapraj Singh ,  Ragupathi J

    IPC: H04L12/931 ,  H04L29/06

    CPC classification number: H04L49/201

    Abstract: Techniques are described for supporting designated forwarder election for a multi-homed Ethernet virtual private network (EVPN) data center interconnect (DCI) between multiple data centers by leveraging and utilizing adjacency state information learned from a multicast routing protocol that controls multicast distribution within an underlying transport network of a local data center. For example, a set or routers operating to provide a multi-homed EVPN DCI may utilize adjacency state information learned from a Protocol Independent Multicast (PIM) executing within the underlying transport network of a multi-homed data center to facilitate selection of a designated forwarder for the EVPN between the data centers. By leveraging adjacency state information, an enhanced DF election may be automatically performed for the EVPN to facilitate selection of a designated forwarder in a manner that may avoid loss of traffic in situations where a topology event in the underlying transport network of the data center.

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