公开(公告)号：US10601724B1

公开(公告)日：2020-03-24

申请号：US16178418

申请日：2018-11-01

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/863 ,  H04L12/851 ,  H04L12/911 ,  H04L12/801 ,  H04L12/26

Abstract: The present technology is directed to a system and method for implementing network resource partitioning and Quality of Service (QoS) separation through network slicing. Embodiments of the present invention describe scalable network slicing method based on defining Segment Routing Flexible Algorithm to represent a network slice and assigning a distinct QoS policy queue to each of the Flexible Algorithms configured on a network node. Therefore, scalable network slice based queuing is implemented wherein a single packet processing queue is assigned to each Flex-Algorithm based network slice. QoS policy queue may be implemented in a hierarchical fashion by differentiation between flow packets in a single QoS policy queue based on value of experimental bits in the header.

公开(公告)号：US10594513B2

公开(公告)日：2020-03-17

申请号：US15925731

申请日：2018-03-19

Applicant: Cisco Technology, Inc.

Inventor： Pablo Camarillo Garvia ,  Hendrikus G. P. Bosch ,  Clarence Filsfils

IPC: H04L12/46 ,  H04L12/741 ,  H04W84/04 ,  H04L12/723

Abstract: In one embodiment, a segment routing and tunnel exchange provides packet forwarding efficiencies in a network, including providing an exchange between a segment routing domain and a packet tunnel domain. One application includes the segment routing and tunnel exchange interfacing segment routing packet forwarding (e.g., in a Evolved Packet Core (EPC) and/or 5-G user plane) and packet tunnel forwarding in access networks (e.g., replacing a portion of a tunnel between an access node and a user plane function for accessing a corresponding data network). In one embodiment, a network provides mobility services using a segment routing data plane that spans segment routing and tunnel exchange(s) and segment routing-enabled user plane functions. One embodiment uses the segment routing data plane without any modification to a (radio) access network (R)AN (e.g., Evolved NodeB, Next Generation NodeB) nor to user equipment (e.g., any end user device).

公开(公告)号：US20180375763A1

公开(公告)日：2018-12-27

申请号：US15783753

申请日：2017-10-13

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Clarence Filsfils ,  Darren Dukes ,  Gaurav Dawra ,  Francois Clad ,  Pablo Camarillo Garvia

IPC: H04L12/741 ,  H04L12/46

Abstract: In one embodiment, Ethernet Virtual Private Network (EVPN) is implemented using Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) underlay network and SRv6-enhanced Border Gateway Protocol (BGP) signaling. A particular route associated with a particular Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) Segment Identifier (SID) is advertised in a particular route advertisement message of a routing protocol (e.g., BGP). The SID includes a locator of a particular router and a function encoding representing a particular EVPN end function of the particular router, with the particular SID including a routable prefix to the particular router. The particular router receives a particular packet including the particular SID; and in response, the particular router performs the particular EVPN end function on the particular packet. In one embodiment, the particular packet includes a Segment Routing Header (SRH) including the particular SID as the currently active SID.

公开(公告)号：US20250055789A1

公开(公告)日：2025-02-13

申请号：US18629355

申请日：2024-04-08

Applicant: Cisco Technology, Inc.

Inventor： Clarence Filsfils ,  Syed Kamran Raza ,  Pablo Camarillo Garvia ,  Jisu Bhattacharya

IPC: H04L45/302 ,  H04L45/24 ,  H04L47/125 ,  H04L47/2483

Abstract: This disclosure describes techniques and mechanisms for coupling measurement probes with customer data traffic and enabling real-time and selective management of ECMP pathways that are not meeting performance metric(s) in a service provider network. Nodes within the service provider network are configured to perform specific hashing behavior. An ingress node may be configured to create and maintain a TCAM table to store flow label(s) corresponding to ECMP pathways that are not meeting performance metric(s). The system may configure performance measurement session(s) between an ingress node and an egress node. The system may receive performance data, identify pathway(s) violating performance metric(s), and may perform action(s) in real-time.

公开(公告)号：US20240430188A1

公开(公告)日：2024-12-26

申请号：US18371848

申请日：2023-09-22

Applicant: Cisco Technology, Inc.

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

IPC: H04L43/10 ,  H04L43/04 ,  H04L43/08 ,  H04L45/24

Abstract: Techniques for determine latency, loss, and liveness performance metrics associated with ECMP routes. The techniques may include determining that a TWAMP probe is to be sent from a first node to a second node along an equal-cost multipath ECMP route. In some examples, the first node may generate a packet for sending the TWAMP probe to the second node. The packet may include information specifying a forward path and reverse path to be traversed by the packet. In examples, the first node may send the packet to the second node along the ECMP route and subsequently receive the packet including telemetry data associated with the second node and a midpoint node of the ECMP route. Based at least in part on the telemetry data, the first node may determine a metric indicative of a performance measurement associated with the ECMP route.

公开(公告)号：US12088483B2

公开(公告)日：2024-09-10

申请号：US18207568

申请日：2023-06-08

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

CPC classification number: H04L43/0805 ,  H04L41/12 ,  H04L43/0852 ,  H04L43/106 ,  H04L43/12 ,  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：US20240235946A9

公开(公告)日：2024-07-11

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: H04L41/122 ,  H04L41/0895 ,  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：US20240163179A1

公开(公告)日：2024-05-16

申请号：US18422801

申请日：2024-01-25

Applicant: Cisco Technology, Inc.

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

IPC: H04L41/122 ,  H04L41/0895 ,  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 (NVF) chain. A path tracing packet is generated having a Midpoint Compressed Data (MCD) to collect path tracing information of the NVF chain. The NVF 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 has a second field that indicates a particular path tracing format to be used. The path tracing packet is passed through the NVF chain and is then received back again after passing through the NVF chain. Data collected by the path tracing packet is analyzed to determine which NVF nodes the path tracing packet passed through, and the amount of time taken for the path tracing packet to pass through, the NVF chain.

公开(公告)号：US20240098161A1

公开(公告)日：2024-03-21

申请号：US18360783

申请日：2023-07-27

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Clarence Filsfils ,  Darren Dukes ,  Gaurav Dawra ,  Francois Clad ,  Pablo Camarillo Garvia

IPC: H04L69/22 ,  H04L12/46 ,  H04L45/00 ,  H04L45/02 ,  H04L45/50 ,  H04L45/74 ,  H04L45/741 ,  H04L49/35 ,  H04L61/5007 ,  H04L67/10 ,  H04L67/63 ,  H04L69/324

CPC classification number: H04L69/22 ,  H04L12/4633 ,  H04L12/4641 ,  H04L45/04 ,  H04L45/14 ,  H04L45/34 ,  H04L45/50 ,  H04L45/74 ,  H04L45/741 ,  H04L49/35 ,  H04L61/5007 ,  H04L67/10 ,  H04L67/63 ,  H04L69/324 ,  H04L61/2503

Abstract: In one embodiment, Ethernet Virtual Private Network (EVPN) is implemented using Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) underlay network and SRv6-enhanced Border Gateway Protocol (BGP) signaling. A particular route associated with a particular Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) Segment Identifier (SID) is advertised in a particular route advertisement message of a routing protocol (e.g., BGP). The SID includes encoding representing a particular Ethernet Virtual Private Network (EVPN) Layer 2 (L2) flooding Segment Routing end function of the particular router and a particular Ethernet Segment Identifier (ESI), with the particular SID including a routable prefix to the particular router. The particular router receives a particular packet including the particular SID; and in response, the particular router performs the particular EVPN end function on the particular packet.

公开(公告)号：US11716268B2

公开(公告)日：2023-08-01

申请号：US17344443

申请日：2021-06-10

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04L43/0805 ,  H04L41/12 ,  H04L43/0852 ,  H04L43/106 ,  H04L43/12 ,  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.