公开(公告)号：US11075814B2

公开(公告)日：2021-07-27

申请号：US16143118

申请日：2018-09-26

Applicant: Cisco Technology, Inc.

Inventor： Carlos M. Pignataro ,  Rajesh Kumar ,  Marc Holloman

IPC: H04L12/24 ,  H04L12/751

Abstract: Network topology information may be determined for a plurality of network devices on a network. System identifier information may then be determined for each of the plurality of network devices on the network. The system identifier information may be a list of network solutions that each network device actually or potentially belongs to. The system may then flag the system identifier information to indicate whether each solution is an actual or a potential solution.

公开(公告)号：US11050848B2

公开(公告)日：2021-06-29

申请号：US16786383

申请日：2020-02-10

Applicant: Cisco Technology, Inc.

Inventor： Antonio Nucci ,  Ahmed Khattab ,  Carlos M. Pignataro ,  Richard M. Plane ,  Duen-Uei D. Chen ,  Samudra H. Bekti

IPC: H04L29/08 ,  H04L29/06 ,  G06F8/61

Abstract: Presented herein are methods associated with a Services Delivery Platform (SDP) architecture for a distributed application building blocks, such as microservices, deployment-agnostic. The system includes a central compute node and numerous remote compute nodes. Techniques are provided to “onboard” and assimilate the capabilities of remote compute nodes so that they are an integrated part of the SDP system and can be accessed and used in connection with one or more services provided by the SDP system.

公开(公告)号：US11032197B2

公开(公告)日：2021-06-08

申请号：US15266498

申请日：2016-09-15

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Peter Psenak

IPC: H04L12/741 ,  H04L12/703 ,  H04W24/06 ,  H04L29/06

Abstract: Methods and systems are disclosed for detection of reroute occurrences in segment routing enabled networks. In one embodiment, a method includes receiving, at a first node in a communications network, a test message comprising a header, where the header comprises one or more segment identifiers. This embodiment of the method further includes detecting a first indicator of a rerouted test path for the message and sending an outgoing message to a node determined using the header, where sending the outgoing message comprises including in the outgoing message a second indicator that the test message has been rerouted. An embodiment of a system includes a network interface adapted for data communication with one or more nodes of a communications network and a processor operably coupled to the network interface and adapted to implement an embodiment of the method.

公开(公告)号：US20210152460A1

公开(公告)日：2021-05-20

申请号：US17104146

申请日：2020-11-25

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Joseph Michael Clarke

IPC: H04L12/751 ,  G06F11/30 ,  G06F11/34 ,  G06F11/10 ,  H04L12/755

Abstract: A network device receives a data packet including a source address and a destination address. The network device drops the data packet before it reaches the destination address and generates an error message indicating that the data packet has been dropped. The network device encapsulates the error message with a segment routing header comprising a list of segments. The first segment of the list of segments in the segment routing header identifies a remote server, and at least one additional segment is an instruction for handling the error message. The network device sends the encapsulated error message to the remote server based on the first segment of the segment routing header.

公开(公告)号：US11005756B2

公开(公告)日：2021-05-11

申请号：US16231197

申请日：2018-12-21

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Frank Brockners ,  Shwetha Subray Bhandari

IPC: H04L12/715 ,  H04L12/741 ,  H04L12/801 ,  H04L12/54 ,  H04L12/713 ,  H04L12/803 ,  H04L12/70

Abstract: In one embodiment, in-band operations data included in packets being processed is used to signal among entities of a virtualized packet processing apparatus. Using in-band operations data provides insight on actual entities used in processing of the packet within the virtualized packet processing apparatus. The operations data in the packet is modified to signal a detected overload condition of an entity that participates in communicating the packet within the virtualized packet processing apparatus and/or applying a network service to the packet. An In-Situ Operations, Administration, and Maintenance (IOAM) header is used in one embodiment, with the IOAM header typically including a new Overload Flag to signal the detection of the overload condition. In response to the signaled overload condition, a load balancer is adjusted such that future packets are not distributed to the virtualized entity associated with the detected overload condition.

公开(公告)号：US10979350B1

公开(公告)日：2021-04-13

申请号：US16685096

申请日：2019-11-15

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Pascal Thubert

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/851 ,  H04L12/751 ,  H04L12/721 ,  H04L12/723 ,  H04L12/70

Abstract: In one embodiment, a method comprises: establishing a wireless DetNet track for an identified DetNet flow of DetNet packets, and the DetNet track comprising DetNet devices connected by allocated DetNet segments distinct from IP-based connections; causing, by the network device, a DetNet device(s) to execute distributed validating of any one or more DetNet operations by a DetNet forwarding hardware circuit in a DetNet device under test among the DetNet devices, the distributed validating including: generating a DetNet OAM (d-OAM) probe message comprising an ACH header specifying a DetNet validation identifier and a selected bitstring; validating the DetNet forwarding hardware circuit based on outputting the d-OAM probe message, the d-OAM probe message causing a CPU in the DetNet device(s) to selectively generate an IP-based probe response indicating whether a DetNet operation(s) was executed by the DetNet forwarding hardware circuit, independent of an execution speed of any DetNet forwarding hardware circuit.

公开(公告)号：US10972391B2

公开(公告)日：2021-04-06

申请号：US16565891

申请日：2019-09-10

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro

IPC: H04L12/741 ,  H04L29/06 ,  H04L29/08 ,  H04L12/721

Abstract: In one embodiment, a device in a network identifies a packet to be sent to a destination in the network via a path using segment routing. The device determines a list of one or more unique identifiers for one or more of the nodes along the path. The device includes a segment routing header with the packet, the segment routing header comprising a set of segment identifiers and the list of one or more unique identifiers. The device sends the packet with the segment routing header towards the destination in the network. One or more receiving nodes that receive the packet use the set of segment identifiers to route the packet towards the destination and the list of one or more unique identifiers to notify the device when the packet was not sent to the destination via the path.

公开(公告)号：US10951717B2

公开(公告)日：2021-03-16

申请号：US16156987

申请日：2018-10-10

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Jerome Henry ,  Robert Edgar Barton

IPC: G06F15/173 ,  H04L29/08 ,  H04L12/725

Abstract: Systems, methods, and computer-readable media for differentiating service within a service mesh. A translator service receives network traffic directed to a service mesh from a communications network. The translator service can determine a service characteristic for the network traffic and update rulesets within the service mesh based on the determined service characteristic. The updated rulesets enable the service mesh to differentiate services for the network traffic similarly to forwarding rules within the communications network.

公开(公告)号：US10951578B1

公开(公告)日：2021-03-16

申请号：US16743073

申请日：2020-01-15

Applicant: Cisco Technology, Inc.

Inventor： Nagendra Kumar Nainar ,  Carlos M. Pignataro ,  Rajiv Asati

IPC: H04L12/741 ,  H04L29/12 ,  H04L29/06 ,  H04L12/70

Abstract: Presented herein are techniques that provide for a way to associate a policy, or signal the policy for a user equipment (UE), directly from the UE traffic, inband or, in other words, within the data plane. The policies are effectively embedded in the address of the UE traffic. When the Neutral Host Network (NHN) receives the UE traffic, the policy can be determined directly from the address associated with the UE traffic. This provides for a unique way of integrating a service chain identifier in the Internet Protocol address of the UE to identify the services/policies to be applied to UE traffic in a stateless manner.

公开(公告)号：US20210075722A1

公开(公告)日：2021-03-11

申请号：US16566680

申请日：2019-09-10

Applicant: Cisco Technology, Inc.

Inventor： Reshad Rahman ,  Carlos M. Pignataro ,  Nagendra Kumar Nainar ,  Eric Vyncke

IPC: H04L12/721 ,  H04L12/749 ,  H04L12/703 ,  H04L12/733 ,  H04L12/707 ,  H04L12/46

Abstract: Techniques and mechanisms to enable a Bidirectional Forwarding Detection (BFD) Echo function to be used for IP multi-hop paths using IP encapsulation. A source device may encapsulate one or more BFD Echo packets as payloads in IP packets. The resulting IP packets may then be sent from a source device to a destination device over a multi-hop path such that one or more intermediary devices forward the IP packets onto the destination device. Upon receiving the IP packets, the destination device may echo back the one or more BFD Echo packets in the forwarding plane to indicate connectivity of the forwarding path between the devices. However, if the BFD Echo packets are not echoed back to the source device, the source device may determine that the multi-hop path has experienced a fault, and that traffic is to be rerouted through other paths.