公开(公告)号：US11245664B2

公开(公告)日：2022-02-08

申请号：US16904301

申请日：2020-06-17

Applicant: Cisco Technology, Inc.

Inventor： Padmanab Pathikonda ,  Rishi Chhibber ,  Stig Ingvar Venaas ,  Ramakrishnan Chokkanathapuram Sundaram ,  Francesco Meo ,  Rahul Parameswaran

IPC: H04L29/12 ,  H04L12/721 ,  H04W40/02 ,  H04W28/20 ,  H04L12/927

Abstract: In one embodiment, a first networking device associated with a switched network comprises one or more processors and one or more computer-readable media storing computer-executable instructions that, when executed, cause the one or more processors to perform acts comprising configuring, on the first networking device, a network-address-translation (NAT) rule indicating that a first multicast group is to be translated to a second multicast group. The acts further include, at least partly in response to the configuring of the NAT rule, storing the NAT rule at the first networking device, generating a message indicating the NAT rule, and sending the message to at least a second networking device associated with the switched network.

公开(公告)号：US09792106B1

公开(公告)日：2017-10-17

申请号：US14450935

申请日：2014-08-04

Applicant: Cisco Technology, Inc.

Inventor： Raja Kommula ,  Chickayya Naik ,  Naren Mididaddi ,  Francesco Meo ,  Sharanya Subramanian

IPC: G06F9/445 ,  G06F1/24 ,  G06F9/44 ,  H04L12/24

CPC classification number: G06F8/65 ,  G06F1/24 ,  G06F8/656 ,  G06F9/4406 ,  H04L41/082 ,  H04L43/10

Abstract: A network device includes a control processor and a network processor unit (NPU) to forward network packets between network ports of the device. The processor downloads a new operating system (OS). The processor performs a fast upgrade to the new OS using a fast upgrade/reload technique to isolate the processor from interruptions and, without rebooting the processor, start the new OS in place of an existing OS. The fast upgrade/reload also includes delaying a reset of the NPU so that the NPU continues to route the network packets based on existing forwarding information. The fast upgrade/reload includes resetting the NPU only when the new OS first accesses the NPU, and then programming the reset NPU.

公开(公告)号：US20210400017A1

公开(公告)日：2021-12-23

申请号：US16904301

申请日：2020-06-17

Applicant: Cisco Technology, Inc.

Inventor： Padmanab Pathikonda ,  Rishi Chhibber ,  Stig Ingvar Venaas ,  Ramakrishnan Chokkanathapuram Sundaram ,  Francesco Meo ,  Rahul Parameswaran

IPC: H04L29/12 ,  H04L12/721

Abstract: In one embodiment, a first networking device associated with a switched network comprises one or more processors and one or more computer-readable media storing computer-executable instructions that, when executed, cause the one or more processors to perform acts comprising configuring, on the first networking device, a network-address-translation (NAT) rule indicating that a first multicast group is to be translated to a second multicast group. The acts further include, at least partly in response to the configuring of the NAT rule, storing the NAT rule at the first networking device, generating a message indicating the NAT rule, and sending the message to at least a second networking device associated with the switched network.

公开(公告)号：US20200382411A1

公开(公告)日：2020-12-03

申请号：US16426377

申请日：2019-05-30

Applicant: Cisco Technology, Inc.

Inventor： Francesco Meo ,  Stig Ingvar Venaas ,  Rahul Savarapu Parameswaran

IPC: H04L12/761 ,  H04L12/751 ,  H04L12/721

Abstract: Systems and methods provide for the dynamic discovery, update and propagation of multicast streams capabilities in a network. An endpoint can be coupled to a first hop router in a network environment. The first hop router can discover multicast flow characteristics information associated with the endpoint and propagate the multicast flow characteristics information of the endpoint to additional network nodes in the network environment. The first hop router and at least a portion of the additional network nodes can form one or more multicast flows associated with the endpoint through the network environment using the multicast flow characteristic information associated with the endpoint.

公开(公告)号：US20240380706A1

公开(公告)日：2024-11-14

申请号：US18315850

申请日：2023-05-11

Applicant: Cisco Technology, Inc.

Inventor： Francesco Meo ,  Sachin V Vishwarupe ,  Lakshmi Ramesh ,  Roshan Lal

IPC: H04L47/41 ,  H04L47/10 ,  H04L61/45

Abstract: Methods are provided for visualizing end-to-end path traversed by a hybrid media traffic flow. Specifically, the methods involve obtaining at least one hybrid flow record that includes information about a source of a traffic flow prior to performing a network address translation for the traffic flow. The traffic flow traverses from the source, along a path in a network, to a destination. The method further involves generating a merged flow data record in which at least two flow data records are merged based on the at least one hybrid flow record. The at least two flow data records include a unicast flow data record and a multicast flow data record based on the traffic flow traversing along the path in the network. The method further includes providing an end-to-end visibility of the path traversed by the traffic flow based on the merged flow data record.

公开(公告)号：US11627096B2

公开(公告)日：2023-04-11

申请号：US16431649

申请日：2019-06-04

Applicant: Cisco Technology, Inc.

Inventor： Roshan Lal ,  Rishi Chhibber ,  Padmanab Pathikonda ,  Lakshmi Priya Sarma ,  Francesco Meo

IPC: H04L47/74 ,  H04L45/24 ,  H04L47/76 ,  H04L45/00 ,  H04L47/783

Abstract: In one embodiment, a method includes receiving a request to establish a path for a data stream from the first network apparatus to a second network apparatus, where the request is associated with a requested bandwidth for the data stream, and where the first network apparatus and the second network apparatus are connected by a link aggregation group including a number of physical links, accessing bandwidth information representing a number of remaining bandwidths of the respective multiple of physical links, determining that the requested bandwidth is not satisfied by any of the number of remaining bandwidths of the number of physical links, and sending a response rejecting the request to establish the path.

公开(公告)号：US20220337441A1

公开(公告)日：2022-10-20

申请号：US17232848

申请日：2021-04-16

Applicant: Cisco Technology, Inc.

Inventor： Rishi Chhibber ,  Roshan Lal ,  Padmanab Pathikonda ,  Francesco Meo ,  Ramakrishnan Chokkanathapuram Sundaram

IPC: H04L12/18 ,  H04L12/707

Abstract: This disclosure describes techniques for improved multicast network telemetry implemented over multilayer switches in a PIM domain. The multilayer switches may be configured to collectively certify end-to-end flow provisioning, and to publish telemetry data certifying flow provisioning from a single notifier to an external controller host. Computational workload and network traffic for streaming data related to certifying path provisioning is kept to a minimum for each flow that needs to be certified, which also keeps compounding of network traffic for many different flows to a minimum. Moreover, since controller hosts are notified upon successful provisioning but not at other times, controller hosts can trust that the telemetric data is minimally latent, and may be relied upon to enact timely actions which produce desired outcomes.

公开(公告)号：US20220321454A1

公开(公告)日：2022-10-06

申请号：US17846564

申请日：2022-06-22

Applicant: Cisco Technology, Inc.

Inventor： Francesco Meo ,  Stig Ingvar Venaas ,  Rahul Savarapu Parameswaran

IPC: H04L45/16 ,  H04L45/02 ,  H04L45/00

Abstract: Systems and methods provide for the dynamic discovery, update and propagation of multicast streams capabilities in a network. An endpoint can be coupled to a first hop router in a network environment. The first hop router can discover multicast flow characteristics information associated with the endpoint and propagate the multicast flow characteristics information of the endpoint to additional network nodes in the network environment. The first hop router and at least a portion of the additional network nodes can form one or more multicast flows associated with the endpoint through the network environment using the multicast flow characteristic information associated with the endpoint.

公开(公告)号：US20210218671A1

公开(公告)日：2021-07-15

申请号：US16743752

申请日：2020-01-15

Applicant: Cisco Technology, Inc.

Inventor： Francesco Meo ,  Stig Ingvar Venaas ,  Roshan Lal ,  Rishi Chhibber ,  Ravinder Vissapragada

IPC: H04L12/781 ,  H04L12/751 ,  H04L12/715 ,  H04L29/12 ,  H04L12/18

Abstract: Techniques for utilizing Software-Defined Networking (SDN) controllers and network border leaf nodes of respective cloud computing networks to configure a data transmission route for a multicast group. Each border leaf node may maintain a respective external sources database, including a number of records indicating associations between a multicast data source, one or more respective border leaf nodes disposed in the same network as the multicast data source, and network capability information. A border leaf node, disposed in the same network as a multicast data source, may broadcast a local source discovery message to all border leaf nodes in remote networks to which it is communicatively coupled. A border leaf node may also communicate network capability information associated with one or more remote networks to a local SDN controller. The SDN controller may utilize the network capability information to configure a data transmission route to one or more destination nodes.

公开(公告)号：US20200336429A1

公开(公告)日：2020-10-22

申请号：US16389197

申请日：2019-04-19

Applicant: Cisco Technology, Inc.

Inventor： Padmanab Pathikonda ,  Rishi Chhibber ,  Roshan Lal ,  Varun Manchanda ,  Francesco Meo ,  Vaibhav Dhage

IPC: H04L12/801 ,  H04L12/761 ,  H04L12/721 ,  H04L12/729 ,  H04L12/923 ,  H04L12/927

Abstract: In service flow capability updating in a guaranteed bandwidth multicast network may be provided. First, a node may determine that a bandwidth requirement of a flow has changed to a new bandwidth value. Then, in response to determining that the bandwidth requirement of the flow has changed to the new bandwidth value, an ingress capacity value may be updated in an interface usage table for a Reverse Path Forwarding (RPF) interface corresponding to the flow. The RPF interface may be disposed on a network device. Next, in response to determining that the bandwidth requirement of the flow has changed to the new bandwidth value, an egress capacity value may be updated in the interface usage table for an Outgoing Interface (OIF) corresponding to the flow. The OIF may be disposed on the network device.