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    Signaling co-routed and non co-routed LSPs of a bidirectional packet TE tunnel
    31.
    发明授权
    Signaling co-routed and non co-routed LSPs of a bidirectional packet TE tunnel 有权

    公开(公告)号：US09313145B2

    公开(公告)日：2016-04-12

    申请号：US14735971

    申请日：2015-06-10

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Muthurajah Sivabalan

    IPC: H04L12/913 ,  H04L12/46 ,  H04L12/721 ,  H04L12/723 ,  H04L12/911

    CPC classification number: H04L47/724 ,  H04L12/4633 ,  H04L45/36 ,  H04L45/50 ,  H04L47/825

    Abstract: Particular embodiments may enable setup and signaling of co-routed and non co-routed label switched paths (LSPs) of a bidirectional packet traffic engineering (TE) tunnel in an unambiguous manner with respect to provisioning of the LSPs/tunnel. A head-end node may set up the bidirectional packet TE tunnel by computing a forward (and possibly a reverse) direction LSP, and then signal the bidirectional TE tunnel utilizing, e.g., extensions to an associated Resource Reservation Protocol (RSVP) signaling method. The extensions to the associated RSVP signaling method include a plurality of additional Association Types of an Extended Association object carried in a RSVP Path message transmitted by the head-end node to the tail-end node over the forward direction LSP, wherein the additional Association Types explicitly identify the provisioning of the forward and reverse direction LSPs as co-routed or non co-routed.

    SIGNALING CO-ROUTED AND NON CO-ROUTED LSPS OF A BIDIRECTIONAL PACKET TE TUNNEL
    32.
    发明申请
    SIGNALING CO-ROUTED AND NON CO-ROUTED LSPS OF A BIDIRECTIONAL PACKET TE TUNNEL 审中-公开
    双向包装TE隧道的信号共同路由和非共同路由

    公开(公告)号：US20150281115A1

    公开(公告)日：2015-10-01

    申请号：US14735971

    申请日：2015-06-10

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Muthurajah Sivabalan

    IPC: H04L12/913 ,  H04L12/911 ,  H04L12/721 ,  H04L12/723

    CPC classification number: H04L47/724 ,  H04L12/4633 ,  H04L45/36 ,  H04L45/50 ,  H04L47/825

    Abstract: Particular embodiments may enable setup and signaling of co-routed and non co-routed label switched paths (LSPs) of a bidirectional packet traffic engineering (TE) tunnel in an unambiguous manner with respect to provisioning of the LSPs/tunnel. A head-end node may set up the bidirectional packet TE tunnel by computing a forward (and possibly a reverse) direction LSP, and then signal the bidirectional TE tunnel utilizing, e.g., extensions to an associated Resource Reservation Protocol (RSVP) signaling method. The extensions to the associated RSVP signaling method include a plurality of additional Association Types of an Extended Association object carried in a RSVP Path message transmitted by the head-end node to the tail-end node over the forward direction LSP, wherein the additional Association Types explicitly identify the provisioning of the forward and reverse direction LSPs as co-routed or non co-routed.

    Abstract translation: 具体实施例可以使得能够以相对于LSP /隧道的提供的明确方式建立和发送双向分组流量工程（TE）隧道的共路由和非共路由标签交换路径（LSP）。 前端节点可以通过计算前向（可能是反向）LSP来建立双向分组TE隧道，然后利用例如关联的资源预留协议（RSVP）信令方法的扩展来向双向TE隧道发信号。 相关RSVP信令方法的扩展包括由前端节点通过前向LSP发送到尾端节点的RSVP路径消息中携带的扩展关联对象的多个附加关联类型，其中附加关联类型 明确地将前向和反向LSP的配置标识为共路由或非共路由。

    PERFORMANCE MEASUREMENT, TELEMETRY, AND OAM IN MPLS NETWORKS USING ENTROPY LABELS
    33.
    发明申请
    PERFORMANCE MEASUREMENT, TELEMETRY, AND OAM IN MPLS NETWORKS USING ENTROPY LABELS 有权

    公开(公告)号：US20250062981A1

    公开(公告)日：2025-02-20

    申请号：US18936874

    申请日：2024-11-04

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Clarence Filsfils

    IPC: H04L45/12 ,  H04L12/46 ,  H04L43/0852 ,  H04L45/50

    Abstract: Techniques for utilizing entropy labels of a Multiprotocol Label Switching (MPLS) label stack for performing monitoring operations (e.g., telemetry, performance measurement, OAM, etc.) without altering the MPLS label stack and/or packet path (e.g., ECMP path). The techniques may include determining, by a node of a network, to perform a monitoring operation associated with traffic that is to be sent along a path through the network. In some examples, the node may receive a packet that is to be sent along the path and encapsulate the packet with an MPLS header. The MPLS header may include an entropy label, entropy label indicator, or other label that is capable of carrying a flag indicating the monitoring operation to be performed. The flag may be carried in a TTL field or traffic class field of the label such that the MPLS label stack is not altered to trigger the monitoring operation.

    ECMP-AWARE TWAMP PERFORMANCE MEASUREMENTS
    34.
    发明申请
    ECMP-AWARE TWAMP PERFORMANCE MEASUREMENTS 有权

    公开(公告)号：US20240430188A1

    公开(公告)日：2024-12-26

    申请号：US18371848

    申请日：2023-09-22

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Clarence Filsfils ,  Sonia Ben Ayed ,  Ahmed Mohamed Ahmed Abdelsalam ,  Pablo Camarillo Garvia

    IPC: H04L43/10 ,  H04L43/04 ,  H04L43/08 ,  H04L45/24

    Abstract: Techniques for determine latency, loss, and liveness performance metrics associated with ECMP routes. The techniques may include determining that a TWAMP probe is to be sent from a first node to a second node along an equal-cost multipath ECMP route. In some examples, the first node may generate a packet for sending the TWAMP probe to the second node. The packet may include information specifying a forward path and reverse path to be traversed by the packet. In examples, the first node may send the packet to the second node along the ECMP route and subsequently receive the packet including telemetry data associated with the second node and a midpoint node of the ECMP route. Based at least in part on the telemetry data, the first node may determine a metric indicative of a performance measurement associated with the ECMP route.

    Circuit-style network with co-routed bidirectional network paths
    35.
    发明授权
    Circuit-style network with co-routed bidirectional network paths 有权

    公开(公告)号：US12160365B2

    公开(公告)日：2024-12-03

    申请号：US17741241

    申请日：2022-05-10

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Zafar Ali ,  Francois Clad ,  Bertrand Herbert Guy Duvivier ,  Mikhail Koldychev ,  Rakesh Gandhi ,  Sagar Soni

    IPC: H04L45/42 ,  H04L45/00 ,  H04L45/28 ,  H04L45/74

    Abstract: Disclosed are systems, apparatuses, methods, and computer-readable media to implement circuit-style network with co-routed bidirectional network paths. A method includes receiving a request for a circuit policy between a source node and a destination node, the circuit policy defining a co-routed bidirectional policy between the source node and the destination node; requesting a path compute service to identify a path between the source node and the destination node that satisfies the circuit policy through a first network; receiving a path identifying a first set of network nodes that satisfy the circuit policy; configuring each node in the first set of network nodes within the first network with the circuit policy; and establishing a connection using the path that satisfies the circuit policy between the source node and the destination node.

    MULTIPROTOCOL LABEL SWITCHING (MPLS) DATA PLANE HEADER EXTENSIONS
    37.
    发明公开
    MULTIPROTOCOL LABEL SWITCHING (MPLS) DATA PLANE HEADER EXTENSIONS 审中-公开

    公开(公告)号：US20240235993A1

    公开(公告)日：2024-07-11

    申请号：US18611925

    申请日：2024-03-21

    Applicant: Cisco Technology, Inc.

    Inventor： Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Jisu Bhattacharya

    IPC: H04L45/50 ,  H04L45/12 ,  H04L45/42

    CPC classification number: H04L45/507 ,  H04L45/123 ,  H04L45/42

    Abstract: Systems and techniques are provided for implementing multiprotocol label switching (MPLS) header extensions. In some examples, a method can include, receiving, by a router of a MPLS network, a data packet. In some aspects, the method can include adding, by the router of the MPLS network, at least one entry to an MPLS stack of the data packet, wherein the at least one entry includes an MPLS extension indicator (MEI) that is associated with at least one of an in-stack extension header presence indicator (IPI) and a bottom-of-stack extension header presence indicator (BPI). In some examples, the method can include adding, based on the IPI and the BPI, at least one of an in-stack extension header and a bottom-of-stack extension header to the MPLS stack of the data packet.

    Multiprotocol label switching (MPLS) data plane header extensions
    39.
    发明授权
    Multiprotocol label switching (MPLS) data plane header extensions 有权

    公开(公告)号：US11979317B2

    公开(公告)日：2024-05-07

    申请号：US17699638

    申请日：2022-03-21

    Applicant: Cisco Technology, Inc.

    Inventor： Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Jisu Bhattacharya

    IPC: H04L45/50 ,  H04L45/12 ,  H04L45/42

    CPC classification number: H04L45/507 ,  H04L45/123 ,  H04L45/42

    Abstract: Systems and techniques are provided for implementing multiprotocol label switching (MPLS) header extensions. In some examples, a method can include, receiving, by a router of a MPLS network, a data packet. In some aspects, the method can include adding, by the router of the MPLS network, at least one entry to an MPLS stack of the data packet, wherein the at least one entry includes an MPLS extension indicator (MEI) that is associated with at least one of an in-stack extension header presence indicator (IPI) and a bottom-of-stack extension header presence indicator (BPI). In some examples, the method can include adding, based on the IPI and the BPI, at least one of an in-stack extension header and a bottom-of-stack extension header to the MPLS stack of the data packet.

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