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    Scalable distributed end-to-end performance delay measurement for segment routing policies
    1.
    发明授权
    Scalable distributed end-to-end performance delay measurement for segment routing policies 有权

    公开(公告)号：US10230605B1

    公开(公告)日：2019-03-12

    申请号：US16121535

    申请日：2018-09-04

    Applicant: Cisco Technology, Inc.

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

    IPC: H04L12/28 ,  H04L12/26 ,  H04L12/44 ,  H04J1/16

    Abstract: 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.

    In-situ operation, administration, and maintenance in segment routing with multiprotocol label switching networks
    2.
    发明授权
    In-situ operation, administration, and maintenance in segment routing with multiprotocol label switching networks 有权

    公开(公告)号：US12184543B2

    公开(公告)日：2024-12-31

    申请号：US17239003

    申请日：2021-04-23

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Sagar Soni ,  Patrick Khordoc

    IPC: H04L69/22 ,  H04L41/142 ,  H04L45/24 ,  H04L45/50

    Abstract: Presented herein is an “In-situ OAM” (IOAM) mechanism that uses a Segment Routing-Multiprotocol Label Switching (SR-MPLS) IOAM segment identifier that can selectively collect IOAM data from “target” network nodes along a data packet path. In one embodiment, a method includes receiving, at a first network node in the SR-MPLS network, a data packet that includes an MPLS label stack comprising a plurality of segment identifiers (SIDs) associated with a plurality of network nodes. The MPLS label stack includes a first SID associated with the first network node. The method includes determining whether the first SID is an IOAM SID or a regular SID. Upon determining that the first SID is the IOAM SID, the method includes implementing an IOAM function at the first network node. Upon determining that the first SID is the regular SID, the method includes processing the data packet without implementing an IOAM function.

    IN-SITU OPERATION, ADMINISTRATION, AND MAINTENANCE IN SEGMENT ROUTING WITH MULTIPROTOCOL LABEL SWITCHING NETWORKS
    4.
    发明申请
    IN-SITU OPERATION, ADMINISTRATION, AND MAINTENANCE IN SEGMENT ROUTING WITH MULTIPROTOCOL LABEL SWITCHING NETWORKS 有权

    公开(公告)号：US20210243117A1

    公开(公告)日：2021-08-05

    申请号：US17239003

    申请日：2021-04-23

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Sagar Soni ,  Patrick Khordoc

    IPC: H04L12/723 ,  H04L12/24 ,  H04L12/707 ,  H04L29/06

    Abstract: Presented herein is an “In-situ OAM” (IOAM) mechanism that uses a Segment Routing-Multiprotocol Label Switching (SR-MPLS) IOAM segment identifier that can selectively collect IOAM data from “target” network nodes along a data packet path. In one embodiment, a method includes receiving, at a first network node in the SR-MPLS network, a data packet that includes an MPLS label stack comprising a plurality of segment identifiers (SIDs) associated with a plurality of network nodes. The MPLS label stack includes a first SID associated with the first network node. The method includes determining whether the first SID is an IOAM SID or a regular SID. Upon determining that the first SID is the IOAM SID, the method includes implementing an IOAM function at the first network node. Upon determining that the first SID is the regular SID, the method includes processing the data packet without implementing an IOAM function.

    IN-SITU OPERATION, ADMINISTRATION, AND MAINTENANCE IN SEGMENT ROUTING WITH MULTIPROTOCOL LABEL SWITCHING NETWORKS
    5.
    发明申请
    IN-SITU OPERATION, ADMINISTRATION, AND MAINTENANCE IN SEGMENT ROUTING WITH MULTIPROTOCOL LABEL SWITCHING NETWORKS 审中-公开

    公开(公告)号：US20200084143A1

    公开(公告)日：2020-03-12

    申请号：US16276847

    申请日：2019-02-15

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Sagar Soni ,  Patrick Khordoc

    IPC: H04L12/723 ,  H04L29/06 ,  H04L12/707 ,  H04L12/24

    Abstract: Presented herein is an “In-situ OAM” (IOAM) mechanism that uses a Segment Routing-Multiprotocol Label Switching (SR-MPLS) IOAM segment identifier that can selectively collect IOAM data from “target” network nodes along a data packet path. In one embodiment, a method includes receiving, at a first network node in the SR-MPLS network, a data packet that includes an MPLS label stack comprising a plurality of segment identifiers (SIDs) associated with a plurality of network nodes. The MPLS label stack includes a first SID associated with the first network node. The method includes determining whether the first SID is an IOAM SID or a regular SID. Upon determining that the first SID is the IOAM SID, the method includes implementing an IOAM function at the first network node. Upon determining that the first SID is the regular SID, the method includes processing the data packet without implementing an IOAM function.

    IN-SITU PASSIVE PERFORMANCE MEASUREMENT IN A NETWORK ENVIRONMENT
    7.
    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

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Clarence Filsfils ,  Sagar Soni ,  Patrick Khordoc

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

    Abstract: 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
    8.
    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

    Applicant: Cisco Technology, Inc.

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

    IPC: H04L12/26 ,  H04L12/44

    Abstract: 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.

    IN-SITU PASSIVE PERFORMANCE MEASUREMENT IN A NETWORK ENVIRONMENT
    9.
    发明申请
    IN-SITU PASSIVE PERFORMANCE MEASUREMENT IN A NETWORK ENVIRONMENT 有权

    公开(公告)号：US20230076549A1

    公开(公告)日：2023-03-09

    申请号：US17987029

    申请日：2022-11-15

    Applicant: Cisco Technology, Inc.

    Inventor： Rakesh Gandhi ,  Clarence Filsfils ,  Sagar Soni ,  Patrick Khordoc

    IPC: H04L45/00 ,  H04L45/50 ,  H04L69/22 ,  H04L43/0823 ,  H04L47/20 ,  H04L45/74

    Abstract: 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.

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