公开(公告)号：US20220124017A1

公开(公告)日：2022-04-21

申请号：US17075485

申请日：2020-10-20

Applicant: Cisco Technology, Inc.

Inventor： Padmanab Pathikonda ,  Rishi Chhibber ,  Roshan Lal ,  Lakshmi Priya Sarma ,  Vinay Narayana Rai ,  Akash Garg

IPC: H04L12/26 ,  H04J3/06

Abstract: This disclosure describes methods to process timing information of flows in a network. One or more processors determine a latency associated with each of one or more packets of a flow passing through a device. The one or more processors determine that the latency is greater than a baseline latency, and the one or more processors provide a message indicating at least the flow and that the latency is greater than the baseline latency.

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：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：US10862826B2

公开(公告)日：2020-12-08

申请号：US16273496

申请日：2019-02-12

Applicant: Cisco Technology, Inc.

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

IPC: G06F15/173 ,  H04L12/911 ,  H04L12/933 ,  H04L12/801 ,  H04L12/813

Abstract: In one illustrative example, a switch for use in a network fabric which includes a plurality on interconnected switches configured to facilitate communication of IP multicast traffic amongst host devices may be provided. The switch may receive, from a controller, a global set of host policies associated with the plurality of switches of the network fabric. The switch may select, from the global set of host policies, a local subset of host policies applicable to the switch. The switch may grant or deny admission of host devices to receive or send IP multicast traffic flows in the network fabric according to the selected, local subset of host policies.

公开(公告)号：US12063164B2

公开(公告)日：2024-08-13

申请号：US18177976

申请日：2023-03-03

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04L47/745 ,  H04L45/22 ,  H04L45/245 ,  H04L47/76 ,  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 Ethernet links, accessing bandwidth information representing a number of remaining bandwidths of the respective multiple of physical Ethernet links, determining that the requested bandwidth is not satisfied by any of the number of remaining bandwidths of the number of physical Ethernet links, and sending a response rejecting the request to establish the path.

公开(公告)号：US11153214B2

公开(公告)日：2021-10-19

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 ,  H04L12/927 ,  H04L12/729 ,  H04L12/923 ,  H04L12/721

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.

公开(公告)号：US10608924B2

公开(公告)日：2020-03-31

申请号：US16042870

申请日：2018-07-23

Applicant: Cisco Technology, Inc.

Inventor： Padmanab Pathikonda ,  Rishi Chhibber ,  Roshan Lal ,  Ann Roshini Paul ,  Anand Kumar Singh ,  Nataraj Batchu

IPC: H04L12/761 ,  H04L12/753

Abstract: In one illustrative example, an IP network media data router includes a spine and leaf switch architecture operative to provide IP multicast delivery of media data from source devices to receiver devices without the overhead communication with a controller. The architecture can include K spine switches, K sets of L leaf switches, M data links between each leaf switch, and a plurality of bidirectional data ports connected to each leaf switch for a guaranteed non-blocking IP multicast delivery of data. A deterministic hash function a used on both the first hop router and the last hop router to ensure the same spine node is selected for flow stitching. Accordingly, without the extra communication with a centralized controller, the right spine for establishing a multicast flow can be chosen using the deterministic hash function and the distributed resource information stored on each node.

公开(公告)号：US11706041B2

公开(公告)日：2023-07-18

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: H04W4/00 ,  H04L12/18 ,  H04L45/24

CPC classification number: H04L12/18 ,  H04L45/24

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：US20230208779A1

公开(公告)日：2023-06-29

申请号：US18177976

申请日：2023-03-03

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04L47/745 ,  H04L45/22 ,  H04L47/76 ,  H04L45/245 ,  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 Ethernet links, accessing bandwidth information representing a number of remaining bandwidths of the respective multiple of physical Ethernet links, determining that the requested bandwidth is not satisfied by any of the number of remaining bandwidths of the number of physical Ethernet links, and sending a response rejecting the request to establish the path.

公开(公告)号：US10833808B1

公开(公告)日：2020-11-10

申请号：US16428203

申请日：2019-05-31

Applicant: Cisco Technology, Inc.

Inventor： Roshan Lal ,  Rishi Chhibber ,  Mankamana Prasad Mishra ,  Peter Psenak ,  Padmanab Pathikonda ,  Francesco Meo ,  Anand Kumar Singh

IPC: H04L1/12 ,  H04L12/18 ,  H04L1/18

Abstract: Multicast error detection and recovery may be provided. A join request for a multicast stream may be sent from a first network node to a second network node. The join request may be sent over a first link of a plurality of links between the first network node and the second network node. A redirect message indicating that the second network node cannot accommodate the join request may be received by the first network node from the second network node. In response to receiving the redirect message, the join request for the multicast stream may not be sent on a second link of the plurality of links by the first network node to the second network node. And in response to receiving the redirect message, an alternate upstream network node may be determined by the first network node to send the join request for the multicast stream to.