公开(公告)号：US20240372793A1

公开(公告)日：2024-11-07

申请号：US18771934

申请日：2024-07-12

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Ahmed Mohamed Ahmed Abdelsalam ,  Rakesh Gandhi ,  Pablo Camarillo Garvia ,  Francois Clad

IPC: H04L43/0805 ,  H04L41/12 ,  H04L43/0852 ,  H04L43/106 ,  H04L43/12 ,  H04L45/12 ,  H04L45/42 ,  H04L45/741 ,  H04L69/22

Abstract: Techniques for optimizing technologies related to network path tracing and network delay measurements are described herein. Some of the techniques may include using an IPV6 header option and/or segment identifier field of a segment list or a TLV of a segment routing header as a telemetry data carrier. The techniques may also include using an SRv6 micro-segment (uSID) instruction to indicate to a node of a network that the node is to perform one or more path tracing actions and encapsulating the packet and forward. Additionally, the techniques may include using short interface identifiers corresponding to node interfaces to trace a packet path through a network. Further, the techniques may include using short timestamps to determine delay measurements associated with sending a packet through a network. In various examples, the techniques described above and herein may be used with each other to optimize network path tracing and delay measurement techniques.

公开(公告)号：US12088484B2

公开(公告)日：2024-09-10

申请号：US18234276

申请日：2023-08-15

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Ahmed Mohamed Ahmed Abdelsalam ,  Rakesh Gandhi ,  Pablo Camarillo Garvia ,  Francois Clad

IPC: H04L43/106 ,  H04L41/12 ,  H04L43/0805 ,  H04L43/0852 ,  H04L43/12 ,  H04L45/12 ,  H04L45/42 ,  H04L45/741 ,  H04L69/22

CPC classification number: H04L43/0805 ,  H04L41/12 ,  H04L43/0852 ,  H04L43/106 ,  H04L43/12 ,  H04L45/123 ,  H04L45/42 ,  H04L45/741 ,  H04L69/22

Abstract: Techniques for optimizing technologies related to network path tracing and network delay measurements are described herein. Some of the techniques may include using an IPv6 header option and/or segment identifier field of a segment list or a TLV of a segment routing header as a telemetry data carrier. The techniques may also include using an SRv6 micro-segment (uSID) instruction to indicate to a node of a network that the node is to perform one or more path tracing actions and encapsulating the packet and forward. Additionally, the techniques may include using short interface identifiers corresponding to node interfaces to trace a packet path through a network. Further, the techniques may include using short timestamps to determine delay measurements associated with sending a packet through a network. In various examples, the techniques described above and herein may be used with each other to optimize network path tracing and delay measurement techniques.

公开(公告)号：US20240297839A1

公开(公告)日：2024-09-05

申请号：US18227557

申请日：2023-07-28

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Ahmed Mohamed Ahmed Abdelsalam ,  Pablo Camarillo Garvia ,  Jisu Bhattacharya ,  Sonia Ben Ayed

IPC: H04L43/106 ,  H04L43/12

CPC classification number: H04L43/106 ,  H04L43/12

Abstract: Techniques for providing an optimized behavior to source node(s) of a path tracing sequence allowing for implementation of path tracing source node behavior on an ASIC with edit-depth limitations and/or on an ASIC that does not have access to the full 64-bit timestamp. A source node having optimized behavior may be configured to record a first full 64-bit timestamp in an SRH PT-TLV header of a probe packet using the CPU of the source node. A source node having the optimized behavior may also be configured to compute a midpoint compressed data (MCD) entry and record the entry into an MCD stack of a probe packet using the NPU of the source node. A sink node and/or network controller may be configured to determine a final timestamp for the probe packet through the network by leveraging the SRH PT-TLV header and the MCD entry.

公开(公告)号：US11962473B1

公开(公告)日：2024-04-16

申请号：US18133950

申请日：2023-04-12

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/851 ,  H04L41/0895 ,  H04L41/122 ,  H04L41/40 ,  H04L43/10

CPC classification number: H04L41/122 ,  H04L41/0895 ,  H04L41/40 ,  H04L43/10

Abstract: Techniques for monitoring data transport in a network virtualization function chain (chain). A path tracing packet is generated having a Midpoint Compressed Data (MCD) to collect path tracing information of the chain. The network virtualization function node is configured to record an MCD containing Wide Local Path Tracing Identification (WL PT ID). The WL PT ID includes a first field having a value that indicates that a non-standard path tracing format is to be used and a second field that indicates a particular path tracing format to be used. The path tracing packet is passed through the chain and is received back after passing through the chain. Data collected by the path tracing packet is then analyzed to determine which network virtualization function nodes and chains the path tracing packet passed through and the amount of time taken for the path tracing packet to pass through the chain.

公开(公告)号：US20240022510A1

公开(公告)日：2024-01-18

申请号：US18352921

申请日：2023-07-14

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Pablo Camarillo Garvia

IPC: H04L45/74 ,  H04L43/106 ,  H04L45/02 ,  H04L69/22

CPC classification number: H04L45/74 ,  H04L43/106 ,  H04L45/02 ,  H04L69/22

Abstract: The present disclosure provides a packet tracing mechanism will be described that provides packet tracing information to a mobile network controller. In one aspect, a method includes receiving a data packet sent from a source node to a destination node; determining if the data packet is to be updated with packet tracing information; and upon determining that the data packet is to be updated, updating the packet tracing information of the data packet to include identification of the network device and an ingress timestamp of the data packet at the network device for a corresponding network controller to determining network routing policies.

公开(公告)号：US11863435B2

公开(公告)日：2024-01-02

申请号：US17811570

申请日：2022-07-08

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Zafar Ali ,  Syed Kamran Raza ,  Ahmed Refaat Bashandy ,  Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Jaganbabu Rajamanickam ,  Rakesh Gandhi ,  Bhupendra Yadav ,  Faisal Iqbal

IPC: H04L45/00 ,  H04L43/106 ,  H04L45/02 ,  H04L41/0246 ,  H04L45/302 ,  H04L45/741 ,  H04L101/659

CPC classification number: H04L45/34 ,  H04L41/0246 ,  H04L43/106 ,  H04L45/02 ,  H04L45/20 ,  H04L45/304 ,  H04L45/741 ,  H04L2101/659

Abstract: In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

公开(公告)号：US11855884B2

公开(公告)日：2023-12-26

申请号：US18200197

申请日：2023-05-22

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.

公开(公告)号：US11838200B2

公开(公告)日：2023-12-05

申请号：US17448695

申请日：2021-09-23

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Swadesh Agrawal ,  Zafar Ali ,  Pablo Camarillo Garvia ,  Francois Clad

IPC: H04L45/02 ,  H04L45/741

CPC classification number: H04L45/04 ,  H04L45/741

Abstract: In one embodiment, a network comprises a first forwarding domain using a first data plane forwarding protocol and a second forwarding domain using a second data plane forwarding protocol different than the first data forwarding plane forwarding protocol. The first forwarding domain includes a first path node and a particular border node. The second forwarding domain includes a second path node and the particular border node. The particular border node performs Segment Routing or other protocol interworking between the different data plane forwarding domains, such as for transporting packets through a different forwarding domain or translating a packet to use a different data forwarding protocol. These forwarding domains typically include Segment Routing (SR) and SR-Multiprotocol Label Switching (SR-MPLS). Paths through the network are determined by a Path Computation Engine and/or based on route advertisements such associated with Binding Segment Identifiers (BSIDs) (e.g., labels, Internet Protocol version 6 addresses).

公开(公告)号：US20230388207A1

公开(公告)日：2023-11-30

申请号：US18234276

申请日：2023-08-15

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Ahmed Mohamed Ahmed Abdelsalam ,  Rakesh Gandhi ,  Pablo Camarillo Garvia ,  Francois Clad

IPC: H04L43/0805 ,  H04L41/12 ,  H04L43/12 ,  H04L43/0852 ,  H04L43/106 ,  H04L45/12 ,  H04L45/42 ,  H04L45/741

CPC classification number: H04L43/0805 ,  H04L41/12 ,  H04L43/12 ,  H04L43/0852 ,  H04L43/106 ,  H04L45/123 ,  H04L45/42 ,  H04L45/741

Abstract: Techniques for optimizing technologies related to network path tracing and network delay measurements are described herein. Some of the techniques may include using an IPv6 header option and/or segment identifier field of a segment list or a TLV of a segment routing header as a telemetry data carrier. The techniques may also include using an SRv6 micro-segment (uSID) instruction to indicate to a node of a network that the node is to perform one or more path tracing actions and encapsulating the packet and forward. Additionally, the techniques may include using short interface identifiers corresponding to node interfaces to trace a packet path through a network. Further, the techniques may include using short timestamps to determine delay measurements associated with sending a packet through a network. In various examples, the techniques described above and herein may be used with each other to optimize network path tracing and delay measurement techniques.

公开(公告)号：US11785053B2

公开(公告)日：2023-10-10

申请号：US16579906

申请日：2019-09-24

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  David Delano Ward ,  Reshad Rahman ,  Subhasri Dhesikan ,  Eric Albin Voit

IPC: H04L29/06 ,  H04L9/40 ,  H04L12/16 ,  H04L45/00 ,  H04L45/50 ,  H04L47/724 ,  H04L69/326

CPC classification number: H04L63/205 ,  H04L12/16 ,  H04L45/22 ,  H04L45/50 ,  H04L47/724 ,  H04L63/1433 ,  H04L69/326

Abstract: In one embodiment, an apparatus includes one or more processors and one or more computer-readable non-transitory storage media coupled to the one or more processors. The one or more computer-readable non-transitory storage media include instructions that, when executed by the one or more processors, cause the apparatus to perform operations including determining a path through a plurality of provider nodes within a provider network and determining that the path through the plurality of provider nodes within the provider network is secure. The operations also include receiving, from a customer node, a Resource Reservation Protocol (RSVP) path message comprising an attribute for a security request. The operations further include routing the RSVP path message along the path of the plurality of provider nodes.