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    Circuit-style network with co-routed bidirectional network paths
    1.
    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.

    Systems and methods for data plane validation of multiple paths in a network
    3.
    发明授权
    Systems and methods for data plane validation of multiple paths in a network 有权

    公开(公告)号：US11882016B2

    公开(公告)日：2024-01-23

    申请号：US17538091

    申请日：2021-11-30

    Applicant: Cisco Technology, Inc.

    Inventor： Amila Pradeep Kumara Tharaperiya Gamage ,  Rakesh Gandhi ,  Zafar Ali

    IPC: H04L43/50 ,  H04L45/24 ,  H04L45/02

    CPC classification number: H04L43/50 ,  H04L45/02 ,  H04L45/24

    Abstract: Systems, methods, and computer-readable media are disclosed for validating multiple paths used for routing network traffic in a network. In one aspect, a network controller can identify one or more intermediate nodes on each of multiple paths in a network, wherein the multiple paths begin at a first network node and end at a last network node. The network controller can further generate a data packet with a label at the first network node, forward the test data packet from the first network node, along each of the one or more intermediate nodes, to the last network node, and perform a data plane validation process for validating packet forwarding from the first network node to the last network node based on the label(s) by determining if a number of the multiple paths equals to a number of packets received at the last network node.

    Initiator-based data-plane validation for segment routed, multiprotocol label switched (MPLS) networks
    4.
    发明授权
    Initiator-based data-plane validation for segment routed, multiprotocol label switched (MPLS) networks 有权

    公开(公告)号：US11818038B2

    公开(公告)日：2023-11-14

    申请号：US17592215

    申请日：2022-02-03

    Applicant: Cisco Technology, Inc.

    Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Zafar Ali

    IPC: H04L45/50 ,  H04L45/02 ,  H04L43/50 ,  H04L43/10 ,  H04L45/42

    CPC classification number: H04L45/50 ,  H04L43/10 ,  H04L43/50 ,  H04L45/02 ,  H04L45/42

    Abstract: Techniques for initiator-based data-plane validation of segment routed, multiprotocol label switched (MPLS) networks are described herein. In examples, an initiating node may determine to validate data-plane connectivity associated with a network path of the MPLS network. The initiating node may store validation data in a local memory of the initiating node. In examples, the initiating node may send a probe message that includes a request for identification data associated with a terminating node. The terminating node may send a probe reply message that includes the identification data, as well as, in some examples, a code that instructs the initiating node to perform validation. In examples, the initiating node may use the validation data stored in memory to compare to the identification data received from the terminating node to validate data-plane connectivity. In some examples, the initiating node may indicate a positive or negative response after performing the validation.

    Communicating packets across multi-domain networks using compact forwarding instructions
    5.
    发明授权
    Communicating packets across multi-domain networks using compact forwarding instructions 有权

    公开(公告)号：US11722404B2

    公开(公告)日：2023-08-08

    申请号：US17404817

    申请日：2021-08-17

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Francois Clad ,  Zafar Ali ,  Peter Psenak

    IPC: H04L12/721 ,  H04L45/00 ,  H04L69/22 ,  H04L45/02

    CPC classification number: H04L45/34 ,  H04L45/04 ,  H04L69/22

    Abstract: Techniques and mechanisms for compressing the size of SIDs to be smaller than a complete IPv6 address (or “micro SIDs”), and scaling micro SIDs across a multi-domain environment using micro SID-domain-blocks. Segment routing over IPv6 (SRv6) uses 128-bit IPv6 addresses as SIDs for segment routing. According to this disclosure, multiple SRv6 SIDs may be expressed in a compact format such that a 128-bit IPv6 address, such as the destination address field of the IPv6 header, may store multiple micro SIDs. Further, SID-domain-blocks may be assigned to each domain in a multi-domain network such that micro SIDs may be expressed in the context of a given domain, rather than being shared in the global multi-domain network. In this way, lists of domain-specific SIDs may be fully expressed in the IPv6 destination address of the packet to scale micro SID into large, multi-domain networks.

    Circuit-Style Network with Co-Routed Bidirectional Network Paths
    6.
    发明申请
    Circuit-Style Network with Co-Routed Bidirectional Network Paths 有权

    公开(公告)号：US20230021278A1

    公开(公告)日：2023-01-19

    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 ,  H04L45/74 ,  H04L45/28

    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.

    SCALABLE AND PROGRAMMABLE MECHANISM FOR TARGETED IN-SITU OAM IMPLEMENTATION IN SEGMENT ROUTING NETWORKS
    8.
    发明申请
    SCALABLE AND PROGRAMMABLE MECHANISM FOR TARGETED IN-SITU OAM IMPLEMENTATION IN SEGMENT ROUTING NETWORKS 审中-公开

    公开(公告)号：US20200099611A1

    公开(公告)日：2020-03-26

    申请号：US16138650

    申请日：2018-09-21

    Applicant: Cisco Technology, Inc.

    Inventor： Clarence Filsfils ,  Zafar Ali ,  Frank Brockners

    IPC: H04L12/725 ,  H04L29/06 ,  H04L12/715 ,  H04L12/721

    Abstract: The present technology provides a system and method for implementing targeted collection of in-situ Operation, Administration and Maintenance data from select nodes in a Segment Routing Domain. The selection is programmable and is implemented by setting an iOAM bit in the function arguments field of a Segment Identifier. In this way only the nodes associated with local Segment Identifiers (Function field of a Segment Identifier) with an iOAM argument bit are directed to generate iOAM data. The iOAM data generated by target nodes may be stored in TLV field of the segment routing header. The Segment Routing packet is then decapsulated at a Segment Routing egress node and the Header information with the collected iOAM data is sent to a controller entity for further processing, analysis and/or monitoring.

    Bandwidth on-demand services in multiple layer networks
    9.
    发明授权
    Bandwidth on-demand services in multiple layer networks 有权
    多层网络中的带宽点播服务

    公开(公告)号：US09444712B2

    公开(公告)日：2016-09-13

    申请号：US13957533

    申请日：2013-08-02

    Applicant: Cisco Technology, Inc.

    Inventor： Zafar Ali ,  Muthurajah Sivabalan ,  Clarence Filsfils ,  Jan Medved

    IPC: H04L12/26 ,  H04L12/24

    CPC classification number: H04L41/5051 ,  H04L41/0896 ,  H04L43/0876 ,  H04L47/825

    Abstract: Bandwidth usage for an existing communication tunnel between a first device and second device is monitored. A determination is made that additional bandwidth is required for communication between the first network device and the second network device. A determination is made that for the addition of the additional bandwidth would exceed available bandwidth for the existing tunnel. Additional bandwidth is established between the first network device and the second network device.

    Abstract translation: 监视第一设备和第二设备之间现有通信隧道的带宽使用情况。 确定第一网络设备和第二网络设备之间的通信需要额外的带宽。 确定附加带宽的增加将超过现有隧道的可用带宽。 在第一网络设备和第二网络设备之间建立额外的带宽。

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