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    Bit Indexed Explicit Replication Using Internet Protocol Version 6
    42.
    发明申请
    Bit Indexed Explicit Replication Using Internet Protocol Version 6 有权
    使用Internet协议版本6的位索引显式复制

    公开(公告)号：US20150078379A1

    公开(公告)日：2015-03-19

    申请号：US14488810

    申请日：2014-09-17

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Ijsbrand Wijnands ,  Gregory J. Shepherd ,  Nagendra Kumar Nainar ,  Christian Martin

    IPC: H04L12/18 ,  H04L12/741 ,  H04L12/761

    CPC classification number: H04L12/18 ,  H04L12/1886 ,  H04L45/16 ,  H04L45/18 ,  H04L45/50 ,  H04L45/74

    Abstract: Various systems and methods for performing bit indexed explicit replication (BIER) using IPv6. For example, one method involves receiving, at a node, a packet that includes an IP header. The packet also includes a multicast forwarding entry. The method also involves comparing the multicast forwarding entry with forwarding information stored by the node and selecting a neighbor based on the comparing. The method further includes forwarding the packet to the neighbor.

    Abstract translation: 使用IPv6执行位索引显式复制（BIER）的各种系统和方法。 例如，一种方法涉及在节点处接收包括IP报头的分组。 该报文还包括组播转发表项。 该方法还包括将组播转发表项与节点存储的转发信息进行比较，并根据比较选择邻居。 该方法还包括将分组转发到邻居。

    Fast fail-over using tunnels
    44.
    发明授权
    Fast fail-over using tunnels 有权

    公开(公告)号：US11606312B2

    公开(公告)日：2023-03-14

    申请号：US17136930

    申请日：2020-12-29

    Applicant: Cisco Technology, Inc.

    Inventor： Neale D. R. Ranns ,  Ijsbrand Wijnands ,  Gregory J. Shepherd

    IPC: H04L47/70 ,  H04L45/28

    Abstract: Various systems and methods for performing fast fail-over. One method involves receiving a packet at a primary forwarder node of a core network, determining whether the packet was received from a secondary forwarder node of the core network, via a tunnel, and, in response to a determination that the packet was received via the tunnel, forwarding the packet to another node in the core network. The tunnel communicatively couples the primary forwarder node and the secondary forwarder node. The primary forwarder node and the secondary forwarder node communicatively couple a local network and the core network. The packet was transmitted from the local network.

    Bridging of non-capable subnetworks in bit indexed explicit replication
    46.
    发明授权
    Bridging of non-capable subnetworks in bit indexed explicit replication 有权

    公开(公告)号：US11303470B2

    公开(公告)日：2022-04-12

    申请号：US16777945

    申请日：2020-01-31

    Applicant: Cisco Technology, Inc.

    Inventor： Ijsbrand Wijnands ,  Neale D. R. Ranns ,  Gregory J. Shepherd ,  Nagendra Kumar Nainar

    IPC: H04L12/26 ,  H04L12/46 ,  H04L45/50 ,  H04L45/745

    Abstract: Methods and network devices are disclosed for traversal, within a network configured for bit indexed forwarding, of a subnetwork having nodes not configured for bit indexed forwarding. In one embodiment, a method includes receiving, from a next-hop upstream node configured for bit indexed forwarding, an incoming tree descriptor message comprising a tree identifier and a descriptor bit array. Bit values in the descriptor bit array identify intended destination nodes to be reached via a network tree identified by the tree identifier. The embodiment further includes replicating and modifying the incoming tree descriptor message to generate an outgoing tree descriptor message for a next-hop downstream node within the network tree. In addition, the embodiment includes sending the outgoing tree descriptor message to the next-hop downstream node and sending to the next-hop upstream node a local label allocated to the tree identifier.

    Traffic engineering for bit indexed explicit replication
    48.
    发明授权
    Traffic engineering for bit indexed explicit replication 有权

    公开(公告)号：US10958566B2

    公开(公告)日：2021-03-23

    申请号：US16457339

    申请日：2019-06-28

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Toerless Eckert ,  Ijsbrand Wijnands ,  Gregory J. Shepherd ,  Neale D. R. Ranns

    IPC: H04L12/761 ,  H04L12/46 ,  H04L12/703 ,  H04L29/06 ,  H04L12/931 ,  H04L12/741 ,  H04L12/751

    Abstract: Methods, network devices and computer readable media are disclosed for traffic-engineered forwarding through a new form of bit indexed explicit replication. In one embodiment, a method includes receiving, at an ingress node of a network, a message associated with a message flow, obtaining a message bit array corresponding to the message flow, encapsulating the message with the message bit array to form an encapsulated message, and forwarding the encapsulated message into the network. Bit positions in the message bit array are assigned to separate segments of a path or tree in the network, and an explicit path or tree for the message flow is defined as an end to end connection of multiple segments assigned bit positions having a first bit value in the message bit array.

    Bridging of non-capable subnetworks in bit indexed explicit replication
    49.
    发明授权
    Bridging of non-capable subnetworks in bit indexed explicit replication 有权

    公开(公告)号：US10574479B2

    公开(公告)日：2020-02-25

    申请号：US16130631

    申请日：2018-09-13

    Applicant: Cisco Technology, Inc.

    Inventor： Ijsbrand Wijnands ,  Neale D. R. Ranns ,  Gregory J. Shepherd ,  Nagendra Kumar Nainar

    IPC: H04L12/26 ,  H04L12/46 ,  H04L12/723 ,  H04L12/741

    Abstract: Methods and network devices are disclosed for traversal, within a network configured for bit indexed forwarding, of a subnetwork having nodes not configured for bit indexed forwarding. In one embodiment, a method includes receiving, from a first network node not configured for bit indexed forwarding, a data message comprising a local label and a message bit array. Bit values in the message bit array identify intended destination nodes for the message. The embodiment further includes modifying the message bit array to exclude as intended destination nodes for the message any nodes not represented by one or more relative bit positions associated with the local label and stored in an ingress filter data structure. In addition, the embodiment includes forwarding a copy of the data message to a second network node, which is configured for bit indexed forwarding, identified in an accessed entry of a bit indexed forwarding table.

    OVERLAY SIGNALING FOR BIT INDEXED EXPLICIT REPLICATION
    50.
    发明申请
    OVERLAY SIGNALING FOR BIT INDEXED EXPLICIT REPLICATION 审中-公开

    公开(公告)号：US20200052918A1

    公开(公告)日：2020-02-13

    申请号：US16654078

    申请日：2019-10-16

    Applicant: Cisco Technology, Inc.

    Inventor： Ijsbrand Wijnands ,  Gregory J. Shepherd ,  Christian J. Martin

    IPC: H04L12/18 ,  H04L12/761 ,  H04L12/741

    Abstract: Various systems and methods for performing bit indexed explicit replication (BIER). For example, one method involves receiving a membership message that was generated by an egress router, where the membership message comprises information identifying a multicast group, and information identifying a plurality of egress routers. The method identifies at least one bit position in the membership message that is associated with the first egress router, where at least one bit position of the plurality of bit positions is associated with the first egress router. The method also records membership of the first egress router in the multicast group, where the membership is recorded in a bit of a group membership table, and the bit corresponds to the bit position identified in the membership message.

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