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    Enabling Multicast-Label-Distribution-Protocol (mLDP) on Non-mLDP Devices
    11.
    发明申请
    Enabling Multicast-Label-Distribution-Protocol (mLDP) on Non-mLDP Devices 有权

    公开(公告)号：US20210092056A1

    公开(公告)日：2021-03-25

    申请号：US16582906

    申请日：2019-09-25

    Applicant: Cisco Technology, Inc.

    Inventor： IJsbrand Wijnands ,  Lukas Krattiger ,  Mankamana Prasad Mishra ,  Brian Christopher Farnham

    IPC: H04L12/723 ,  H04L12/18 ,  H04L12/751 ,  G06F16/22

    Abstract: In one embodiment, a first label-distribution-protocol (LDP) session is established between a first interface of a first computing device and a second computing device, while a second LDP session is established between a second interface and the second computing device. The method may further comprise receiving a request from a third computing device to subscribe to a multicast group, storing an association between a first label, the multicast group, and the first interface, and sending, to the second computing device via the first LDP session, an indication that the first label is associated with the multicast group. Further, the method may include receiving a request from a fourth computing device to subscribe to the multicast group, storing an association between a second label, the multicast group and, the second interface, and sending, via the second LDP session, an indication that the second label is associated with the multicast group.

    CAM design for bit string lookup
    14.
    发明授权
    CAM design for bit string lookup 有权
    CAM设计用于位串查询

    公开(公告)号：US09583191B1

    公开(公告)日：2017-02-28

    申请号：US14847020

    申请日：2015-09-08

    Applicant: Cisco Technology, Inc.

    Inventor： IJsbrand Wijnands ,  Gregory J. Shepherd

    IPC: G11C15/04 ,  G11C15/00

    CPC classification number: G11C15/00

    Abstract: In one embodiment, a programming content addressable memory (CAM) comprising at least one match line, the at least one match line being preloaded to high, and being logically OR-ed for all selector lines the at least one match line being inverted to low upon a match result the at least one match line comprising transistors and grounding which are activated only when a stored data value and a corresponding selector line evaluate to 1 and the corresponding selector line having a logical AND with the stored data value, wherein the programming CAM is implemented as a Bit Indexed Explicit Replication (BIER) table. Related apparatus, systems and methods are also described.

    Abstract translation: 在一个实施例中，编程内容可寻址存储器（CAM）包括至少一个匹配线，所述至少一个匹配线被预加载到高电平，并且对所有选择器线路进行逻辑或运算，所述至少一个匹配线被反转到低电平 在匹配结果中，至少一个匹配线包括晶体管和接地，只有当存储的数据值和相应的选择器线求值为1并且相应的选择线与存储的数据值具有逻辑“与”时才被激活，其中编程CAM 被实现为位索引显式复制（BIER）表。 还描述了相关装置，系统和方法。

    Management framework for BIER in-band traffic accounting and path monitoring
    15.
    发明授权
    Management framework for BIER in-band traffic accounting and path monitoring 有权

    公开(公告)号：US11451468B2

    公开(公告)日：2022-09-20

    申请号：US17160508

    申请日：2021-01-28

    Applicant: Cisco Technology, Inc.

    Inventor： Mankamana Prasad Mishra ,  Rajiv Asati ,  IJsbrand Wijnands ,  Stephane Litkowski ,  Nitin Kumar

    IPC: H04L45/16 ,  H04L45/24 ,  H04L12/46 ,  H04L69/22 ,  H04L12/18

    Abstract: A method is performed at a router configured to perform Bit Index Explicit Replication (BIER) for forwarding of multicast packets in a network. The method includes, upon receiving a multicast packet of a multicast flow, accessing flow mappings in which multicast flows are mapped to fixed accounting values corresponding to the multicast flows. The method further comprises generating a BIER header for the multicast packet by encoding a multi-segment entropy field of the BIER header with (i) a variable entropy value for equal-cost multi-path (ECMP) load balancing, and (ii) a fixed accounting value among the fixed accounting values that is mapped to the multicast flow in the flow mappings. The method also includes encapsulating the multicast packet with the BIER header to produce an encapsulated multicast packet, and forwarding the encapsulated multicast packet.

    Failure detections in point-to-multipoint packet-forwarding networks
    16.
    发明授权
    Failure detections in point-to-multipoint packet-forwarding networks 有权

    公开(公告)号：US11038790B2

    公开(公告)日：2021-06-15

    申请号：US16432595

    申请日：2019-06-05

    Applicant: Cisco Technology, Inc.

    Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  IJsbrand Wijnands

    IPC: G01R31/08 ,  H04L1/00 ,  H04L12/26

    Abstract: In one embodiment, a method includes identifying a number of target network apparatuses within a network to which a first network apparatus belongs, generating a first message including a reply-required indication and encoded identities for the plurality of target network apparatuses, sending the first message through the network, where the network is configured to deliver a copy of the first message to each of the target network apparatuses using a point-to-multipoint packet-forwarding architecture, receiving one or more second messages from one or more of the target network apparatuses, respectively, where each of the one or more second messages is generated as a reply to the first message by one of the one or more target network apparatuses, and identifying which of the plurality of target network apparatuses failed to respond to the first message based on the received one or more second messages.

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