公开(公告)号：US12301470B2

公开(公告)日：2025-05-13

申请号：US18456381

申请日：2023-08-25

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Pablo Camarillo Garvia

IPC: H04L47/35 ,  H04L43/106 ,  H04L45/02 ,  H04L45/74 ,  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：US20240430154A1

公开(公告)日：2024-12-26

申请号：US18829447

申请日：2024-09-10

Applicant: Cisco Technology, Inc.

Inventor： Peter Psenak ,  Lester C. Ginsberg ,  Ketan Jivan Talaulikar ,  Clarence Filsfils ,  Francois Clad ,  Stephane Litkowski

IPC: H04L41/0654 ,  H04L41/0631 ,  H04L41/0686

Abstract: The present technology is directed to signaling unreachability of a network device, more specifically, a prefix of the network device in network that utilizes route summarization. A pulse trigger agent can detect an unreachability of at least one Provider Edge (PE) device in a network domain of a network and determine that a route summarization is being used within the network where the unreachability of the at least one PE device is hidden by the route summarization. A pulse distribution agent can transmit a failure message informing other PE devices of the unreachability of the at least one PE device.

公开(公告)号：US20240406086A1

公开(公告)日：2024-12-05

申请号：US18806324

申请日：2024-08-15

Applicant: Cisco Technology, Inc.

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

IPC: H04L43/0805 ,  H04L41/12 ,  H04L43/0852 ,  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：US12149626B1

公开(公告)日：2024-11-19

申请号：US16678663

申请日：2019-11-08

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Peter Psenak ,  Ketan Jivan Talaulikar ,  Paul W. Wells

IPC: H04L9/32 ,  H04L9/40 ,  H04L43/0811

Abstract: In one embodiment, a method by an apparatus of a Border Gateway Protocol-Link State (BGP-LS) environment includes receiving an attestation token from a first component and encoding the attestation token in a BGP-LS signaling message. The method further includes sending the BGP-LS signaling message with the encoded attestation token to a second component of the BGP-LS environment.

公开(公告)号：US12149445B2

公开(公告)日：2024-11-19

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

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：USRE50135E1

公开(公告)日：2024-09-17

申请号：US17444169

申请日：2021-11-09

Applicant: Cisco Technology, Inc.

Inventor： Ahmed Refaat Bashandy ,  Clarence Filsfils

IPC: H04L45/74 ,  H04L101/604 ,  H04L101/659 ,  H04L101/672

CPC classification number: H04L45/74 ,  H04L2101/604 ,  H04L2101/659 ,  H04L2101/672

Abstract: In one embodiment, packets are forwarded in a network based on multiple compact forwarding identifiers represented in a single 128-bit Internet Protocol Version 6 (IPv6) address, such as, but not limited to being in the destination address field of the IPv6 header (e.g., possibly in an extended IPv6 header). One embodiment follows the forwarding order of these multiple compact forwarding identifiers by respectively placing them in the single IPv6 address from high-order to lower-order bit positions. In one embodiment, a compact forwarding identifier prefix is part of the address represented by each compact forwarding identifier, typically with the compact forwarding identifier prefix stored in the highest-order bit positions. One embodiment uses a longest prefix matching operation to match the compact forwarding identifier to be used in determining how to next process the packet.

公开(公告)号：US20240297838A1

公开(公告)日：2024-09-05

申请号：US18227602

申请日：2023-07-28

Applicant: Cisco Technology, Inc.

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

IPC: H04L43/0852 ,  H04L43/12

CPC classification number: H04L43/0852 ,  H04L43/12

Abstract: Techniques for processing path tracing probe packets using hardware (e.g., hardware memory of a node) and without the involvement of a path tracing collector component of a network controller. A source node may be configured to generate and assign random flow labels to a large number of probe packets and send them through the network to a sink node. The sink node may determine whether a flow indicated by the probe packet has previously been traversed. Additionally, the sink node may determine latency values associated with the flows, and store probe packets in corresponding latency bins. The latency bins may be stored in hardware memory of the sink node. Telemetry data representing the probe packets stored in the latency bins may be sent to a network controller for further network analysis.

公开(公告)号：US12058038B2

公开(公告)日：2024-08-06

申请号：US17830560

申请日：2022-06-02

Applicant: Cisco Technology, Inc.

Inventor： Francois Clad ,  David Delano Ward ,  Clarence Filsfils

IPC: H04L12/707 ,  G06F1/00 ,  H04L9/40 ,  H04L29/06 ,  H04L45/00 ,  H04L45/302

CPC classification number: H04L45/34 ,  H04L45/22 ,  H04L45/3065 ,  H04L45/38 ,  H04L63/20

Abstract: In one embodiment, a method includes a method includes receiving, by a headend node, network traffic. The method also includes determining, by the headend node, that the network traffic matches a service route. The method further includes steering, by the headend node, the network traffic into an SR-TE policy. The SR-TE policy is associated with the service route and includes a security level constraint.

公开(公告)号：US11936759B2

公开(公告)日：2024-03-19

申请号：US17820000

申请日：2022-08-16

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Francois Clad ,  Pablo Camarillo Garvia ,  Siva Sivabalan ,  Syed Kamran Raza

IPC: H04L69/04 ,  H04L45/74

CPC classification number: H04L69/04 ,  H04L45/74

Abstract: In one embodiment, a method includes identifying, by a network component, a first segment identifier (SID) within a SID list. The first SID includes a first SID block and a first micro SID (uSID). The method also includes initializing, by the network component, a packing list of a uSID carrier with the first uSID of the first SID and initializing, by the network component, a packing block of the uSID carrier with the first SID block of the first SID. The method further includes initializing, by the network component, a remaining packing capacity of the packing list with a carrier capacity of the first SID and initializing, by the network component, an empty compressed SID list.

公开(公告)号：US20240039845A1

公开(公告)日：2024-02-01

申请号：US18456381

申请日：2023-08-25

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Pablo Camarillo Garvia

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

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

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.