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.

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.

公开(公告)号：US10523552B2

公开(公告)日：2019-12-31

申请号：US16156734

申请日：2018-10-10

Applicant: Cisco Technology, Inc.

Inventor： Faisal Iqbal ,  Sagar Soni ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC: H04L12/751 ,  H04L12/803 ,  H04L12/723 ,  H04L12/725

Abstract: One embodiment is a method including creating at an ingress node of a communications network a request message identifying a hashing parameter for a network application, and including range of values for the identified hashing parameter to enable load balancing for packets associated with the network application; forwarding the created request message to a node associated with a next hop along a first path through the network between the ingress node and an egress node; and receiving a response message from the node associated with the next hop, wherein the response message includes load balancing information for the node associated with the next hop corresponding to the range of values for the identified hashing parameter.

公开(公告)号：US20190081882A1

公开(公告)日：2019-03-14

申请号：US16156734

申请日：2018-10-10

Applicant: Cisco Technology, Inc.

Inventor： Faisal Iqbal ,  Sagar Soni ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC: H04L12/751 ,  H04L12/723 ,  H04L12/803

CPC classification number: H04L45/02 ,  H04L45/306 ,  H04L45/50 ,  H04L47/125

Abstract: One embodiment is a method including creating at an ingress node of a communications network a request message identifying a hashing parameter for a network application, and including range of values for the identified hashing parameter to enable load balancing for packets associated with the network application; forwarding the created request message to a node associated with a next hop along a first path through the network between the ingress node and an egress node; and receiving a response message from the node associated with the next hop, wherein the response message includes load balancing information for the node associated with the next hop corresponding to the range of values for the identified hashing parameter.

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.

公开(公告)号：US11533258B2

公开(公告)日：2022-12-20

申请号：US17130336

申请日：2020-12-22

Applicant: Cisco Technology, Inc.

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

IPC: G06F11/00 ,  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.

公开(公告)号：US11032193B2

公开(公告)日：2021-06-08

申请号：US16276847

申请日：2019-02-15

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.

公开(公告)号：US20200252316A1

公开(公告)日：2020-08-06

申请号：US16853450

申请日：2020-04-20

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/26 ,  H04L12/44 ,  H04L12/721 ,  H04L12/727

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.

公开(公告)号：US20200084147A1

公开(公告)日：2020-03-12

申请号：US16243409

申请日：2019-01-09

Applicant: Cisco Technology, Inc.

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

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

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.