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    IN-BAND DIRECT MODE PERFORMANCE LOSS MEASUREMENT IN SOFTWARE DEFINED NETWORKS
    2.
    发明申请
    IN-BAND DIRECT MODE PERFORMANCE LOSS MEASUREMENT IN SOFTWARE DEFINED NETWORKS 审中-公开

    公开(公告)号：US20190280927A1

    公开(公告)日：2019-09-12

    申请号：US16191676

    申请日：2018-11-15

    申请人： Cisco Technology, Inc.

    发明人： Clarence Filsfils ,  Rakesh Gandhi ,  Zafar Ali

    IPC分类号： H04L12/24 ,  H04L12/26 ,  H04L12/707 ,  H04L12/851 ,  H04L12/715

    摘要： Mechanisms are provided for “direct mode” (in-band) performance loss measurement in computer networks where packet loss is measured directly in the data plane using techniques based on ECMP paths. Counters on each of an ingress node and an egress node are configured by a network controller to count traffic for indicators associated with different equal-cost multi-path (ECMP) paths through a network between ingress and egress nodes. Each indicator is toggled on or off during a measurement interval during which traffic is measured by the traffic counters on the ingress and egress nodes for each ECMP path. The traffic counters (measured in bytes/packets) from the ingress and egress nodes are sent via event driven telemetry to the network controller for performance loss measurement determination.

    Standby Bandwidth Aware Path Computation
    3.
    发明申请
    Standby Bandwidth Aware Path Computation 有权
    待机带宽感知路径计算

    公开(公告)号：US20150117222A1

    公开(公告)日：2015-04-30

    申请号：US14067023

    申请日：2013-10-30

    申请人： Cisco Technology, Inc.

    发明人： Tarek Saad ,  Muthurajah Sivabalan ,  Rakesh Gandhi

    IPC分类号： H04L12/729

    CPC分类号： H04L45/125 ,  H04L45/1283 ,  H04L45/22

    摘要： At a first network device, a plurality of paths through a network from a source network device to a destination network device are determined. A vacant bandwidth is calculated for each of the plurality of paths. A primary path is selected from the plurality of paths based on the vacant bandwidth, and a standby path is selected from the plurality of paths based on the vacant bandwidth.

    摘要翻译： 在第一网络设备中，确定通过网络从源网络设备到目的地网络设备的多条路径。 为多个路径中的每一个计算空闲带宽。 基于空闲带宽从多个路径选择主路径，并且基于空闲带宽从多个路径中选择备用路径。

    In-band direct mode performance loss measurement in software defined networks
    5.
    发明授权
    In-band direct mode performance loss measurement in software defined networks 有权

    公开(公告)号：US11184235B2

    公开(公告)日：2021-11-23

    申请号：US16191676

    申请日：2018-11-15

    申请人： Cisco Technology, Inc.

    发明人： Clarence Filsfils ,  Rakesh Gandhi ,  Zafar Ali

    IPC分类号： H04L12/24 ,  H04L12/26 ,  H04L12/851 ,  H04L12/715 ,  H04L12/707 ,  H04L29/06

    摘要： Mechanisms are provided for “direct mode” (in-band) performance loss measurement in computer networks where packet loss is measured directly in the data plane using techniques based on ECMP paths. Counters on each of an ingress node and an egress node are configured by a network controller to count traffic for indicators associated with different equal-cost multi-path (ECMP) paths through a network between ingress and egress nodes. Each indicator is toggled on or off during a measurement interval during which traffic is measured by the traffic counters on the ingress and egress nodes for each ECMP path. The traffic counters (measured in bytes/packets) from the ingress and egress nodes are sent via event driven telemetry to the network controller for performance loss measurement determination.

    IN-SITU PASSIVE PERFORMANCE MEASUREMENT IN A NETWORK ENVIRONMENT
    6.
    发明申请
    IN-SITU PASSIVE PERFORMANCE MEASUREMENT IN A NETWORK ENVIRONMENT 有权

    公开(公告)号：US20210111999A1

    公开(公告)日：2021-04-15

    申请号：US17130336

    申请日：2020-12-22

    申请人： Cisco Technology, Inc.

    发明人： Rakesh Gandhi ,  Clarence Filsfils ,  Sagar Soni ,  Patrick Khordoc

    IPC分类号： H04L12/721 ,  H04L12/723 ,  H04L29/06 ,  H04L12/26 ,  H04L12/813 ,  H04L12/741

    摘要： Techniques for in-situ passive performance measurement are described. In one embodiment, a method includes receiving a data packet at a first network element, determining whether measurement information is to be collected for the data packet, providing one or more measurement fields for the data packet based on a determination that measurement information is to be collected for the data packet in which at least one measurement field identifies a measurement type, and forwarding the data packet to a second network element. The method further includes determining, by the second network element, the measurement type for the data packet, and performing one or more actions based on the measurement type.

    SCALABLE DISTRIBUTED END-TO-END PERFORMANCE DELAY MEASUREMENT FOR SEGMENT ROUTING POLICIES
    7.
    发明申请
    SCALABLE DISTRIBUTED END-TO-END PERFORMANCE DELAY MEASUREMENT FOR SEGMENT ROUTING POLICIES 审中-公开

    公开(公告)号：US20200076719A1

    公开(公告)日：2020-03-05

    申请号：US16280962

    申请日：2019-02-20

    申请人： Cisco Technology, Inc.

    发明人： Clarence Filsfils ,  Rakesh Gandhi ,  Tarek Saad ,  Sagar Soni ,  Patrick Khordoc

    IPC分类号： H04L12/26 ,  H04L12/44

    摘要： The present technology is directed to a scalable solution for end-to-end performance delay measurement for Segment Routing Policies on both SR-MPLS and SRv6 data planes. The scalability of the solution stems from the use of distributed PM sessions along SR Policy ECMP paths. This is achieved by dividing the SR policy into smaller sections comprised of SPT trees or sub-paths, each of which is associated with a Root-Node. Downstream SID List TLVs may be used in Probe query messages for signaling SPT information to the Root-Nodes Alternatively, this SPT signaling may be accomplished by using a centralized controller. Root-Nodes are responsible for dynamically creating PM sessions and measuring delay metrics for their associated SPT tree section. The root-nodes then send the delay metrics for their local section to an ingress PE node or to a centralized controller using delay metric TLV field of the response message.

    PERFORMANCE MEASUREMENT, TELEMETRY, AND OAM IN MPLS NETWORKS USING ENTROPY LABELS
    9.
    发明申请
    PERFORMANCE MEASUREMENT, TELEMETRY, AND OAM IN MPLS NETWORKS USING ENTROPY LABELS 有权

    公开(公告)号：US20230031423A1

    公开(公告)日：2023-02-02

    申请号：US17565823

    申请日：2021-12-30

    申请人： Cisco Technology, Inc.

    发明人： Rakesh Gandhi ,  Clarence Filsfils

    IPC分类号： H04L45/12 ,  H04L45/50 ,  H04L43/0852

    摘要： Techniques are described 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.

    Circuit-Style Network with Co-Routed Bidirectional Network Paths
    10.
    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

    申请人： Cisco Technology, Inc.

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

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

    摘要： 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.