公开(公告)号：US10938590B2

公开(公告)日：2021-03-02

申请号：US16218985

申请日：2018-12-13

Applicant: Cisco Technology, Inc.

Inventor： Jayashree Subramanian ,  Arvind Venkateswaran ,  Mankamana Prasad Mishra ,  Stig Ingvar Venaas

IPC: H04L12/18 ,  H04L12/761 ,  H04L12/46 ,  H04L12/753 ,  H04L12/801

Abstract: A first network device joins a redundancy group of a multihomed network element that is connected to a computing device. The first network device detects an active link between the first network device and the computing device, and receives from the computing device, a subscription to a multicast flow. The first network device adds the subscription to a first list of active multicast subscriptions stored on the first network device. The first network device sends a unicast notification to a second network device of the multihomed network element. The unicast notification causes the subscription to be added to a second list of active multicast subscriptions stored on the second network device.

公开(公告)号：US20200344155A1

公开(公告)日：2020-10-29

申请号：US16392974

申请日：2019-04-24

Applicant: Cisco Technology, Inc.

Inventor： Rishi Chhibber ,  Roshan Lal ,  Rahul Savarapu Parameswaran ,  Subhasri Dhesikan ,  Mankamana Prasad Mishra ,  Stig Ingvar Venaas

IPC: H04L12/721 ,  H04L12/761 ,  H04L12/801 ,  H04L12/911 ,  H04L12/741 ,  H04L12/733

Abstract: In one illustrative example, a multicast traceroute facility for a plurality of interconnected router nodes which are configured to communicate IP multicast traffic amongst hosts is described. The multicast traceroute facility may be for use in processing a multicast traceroute batch query packet which indicates a batch of multicast traceroute queries of a batch query, for identifying a plurality of traced paths for a batch of IP multicast traffic flows. Each identified traced path may be associated with one or more links, each of which has a link metric that satisfies a requested link metric (e.g. a link bandwidth). Resources for satisfying the requested link metric may be reserved for a predetermined or specified time period. The batch of IP multicast traffic flows may be established via at least some of the interconnected router nodes according to the plurality of traced paths identified from the query packet processing.

公开(公告)号：US20200177402A1

公开(公告)日：2020-06-04

申请号：US16205430

申请日：2018-11-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Samir Thoria ,  Krishnaswamy Ananthamurthy ,  Stig Ingvar Venaas

IPC: H04L12/18 ,  H04L12/46 ,  H04L29/08 ,  H04L12/761

Abstract: In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.

公开(公告)号：US11985002B2

公开(公告)日：2024-05-14

申请号：US18052254

申请日：2022-11-03

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Samir Thoria ,  Krishnaswamy Ananthamurthy ,  Stig Ingvar Venaas

IPC: H04L12/18 ,  H04L12/46 ,  H04L45/16 ,  H04L67/2895

CPC classification number: H04L12/185 ,  H04L12/1886 ,  H04L12/4679 ,  H04L45/16 ,  H04L67/2895

Abstract: In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.

公开(公告)号：US20240048474A1

公开(公告)日：2024-02-08

申请号：US18488188

申请日：2023-10-17

Applicant: Cisco Technology, Inc.

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

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

CPC classification number: H04L45/16 ,  H04L45/02 ,  H04L45/34 ,  H04L45/38 ,  H04L65/611

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：US20240007315A1

公开(公告)日：2024-01-04

申请号：US18469016

申请日：2023-09-18

Applicant: Cisco Technology, Inc.

Inventor： Vengada Prasad Govindan ,  Aswin Kuppusami ,  Stig Ingvar Venaas

IPC: H04L12/18 ,  H04L47/2441

CPC classification number: H04L12/18 ,  H04L47/2441

Abstract: In an aspect, an embodiment of the present disclosure is directed to network control topology that implements a centralized network controller to deterministically assign, and reassign, underlay multicast groups according to one or more policies and/or parameterized intent of the network administrator. The centralized network controller, in some embodiments, comprises a map server-map resolver controller configured to provide deterministic and centralized allocation of LISP underlay multicast groups, e.g., to provide security, traffic engineering, network and resource management.

公开(公告)号：US11716216B2

公开(公告)日：2023-08-01

申请号：US17671807

申请日：2022-02-15

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Jayashree Subramanian ,  Stig Ingvar Venaas ,  Rishabh Parekh ,  Ravindran Rajarao

IPC: H04L12/18 ,  H04L45/16 ,  H04L45/60

CPC classification number: H04L12/185 ,  H04L45/16 ,  H04L45/60

Abstract: In an example method for redundant multicast trees with fast recovery, a protocol independent multicast (PIM) backup designated router (BDR) can receive a request from a host to join a multicast group associated with a source; send to a next hop a PIM join message identifying an address of the PIM BDR and identifying the PIM join message as a backup PIM join; receive, from a PIM router along a path to/from the source, a unicast message sent to the address which identifies a second address associated with the PIM router; store the second address and a route associated with the unicast message; in response to a designated router migration trigger, set to blocking a backup multicast tree state associated with the source and multicast group; and send, to the PIM router, a unicast message including instructions to set to blocking a backup multicast tree state at the PIM router.

公开(公告)号：US20220150081A1

公开(公告)日：2022-05-12

申请号：US17582256

申请日：2022-01-24

Applicant: Cisco Technology, Inc.

Inventor： Vengada Prasad Govindan ,  Aswin Kuppusami ,  Stig Ingvar Venaas

IPC: H04L12/18 ,  H04L47/2441

Abstract: In an aspect, an embodiment of the present disclosure is directed to network control topology that implements a centralized network controller to deterministically assign, and reassign, underlay multicast groups according to one or more policies and/or parameterized intent of the network administrator. The centralized network controller, in some embodiments, comprises a map server-neap resolver controller configured to provide deterministic and centralized allocation of underlay multi cast groups, e.g., to provide security, traffic engineering, network and resource management.

公开(公告)号：US11296899B2

公开(公告)日：2022-04-05

申请号：US16289455

申请日：2019-02-28

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Jayashree Subramanian ,  Stig Ingvar Venaas ,  Rishabh Parekh ,  Ravindran Rajarao

IPC: H04L12/18 ,  H04L12/761 ,  H04L12/773 ,  H04L45/16 ,  H04L45/60

Abstract: In an example method for redundant multicast trees with fast recovery, a protocol independent multicast (PIM) backup designated router (BDR) can receive a request from a host to join a multicast group associated with a source; send to a next hop a PIM join message identifying an address of the PIM BDR and identifying the PIM join message as a backup PIM join; receive, from a PIM router along a path to/from the source, a unicast message sent to the address which identifies a second address associated with the PIM router; store the second address and a route associated with the unicast message; in response to a designated router migration trigger, set to blocking a backup multicast tree state associated with the source and multicast group; and send, to the PIM router, a unicast message including instructions to set to blocking a backup multicast tree state at the PIM router.

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.