公开(公告)号：US20210243113A1

公开(公告)日：2021-08-05

申请号：US17234115

申请日：2021-04-19

Applicant: Cisco Technology, Inc.

Inventor： Francesco Meo ,  Stig Ingvar Venaas ,  Rahul Savarapu Parameswaran ,  Ramakrishnan Chokkanathapuram Sundaram ,  Mankamana Prasad Mishra

IPC: H04L12/761 ,  H04L12/721 ,  H04L12/729

Abstract: A router node may be configured for communication of multicast traffic in a network fabric which may include a plurality of spine nodes interconnected to a plurality of leaf nodes. The router node may be configured as one of the leaf nodes and serve as a first hop router for multicast traffic. At the router node, a message for flooding the network fabric may be sent based on an indication of communication of multicast traffic for a multicast group from a source device. The message may include at least one spine node identifier of at least one preferred spine node joined to the multicast group at the router node. The message may be for indicating, to at least one of the leaf nodes, to prioritize joining to the multicast group at the at least one preferred spine node according to at least one spine node identifier.

公开(公告)号：US11038794B2

公开(公告)日：2021-06-15

申请号：US16453044

申请日：2019-06-26

Applicant: Cisco Technology, Inc.

Inventor： Francesco Meo ,  Stig Ingvar Venaas ,  Rahul Savarapu Parameswaran ,  Ramakrishnan Chokkanathapuram Sundaram ,  Mankamana Prasad Mishra

IPC: H04L12/761 ,  H04L12/721 ,  H04L12/729

Abstract: A router node may be configured for communication of multicast traffic in a network fabric which may include a plurality of spine nodes interconnected to a plurality of leaf nodes. The router node may be configured as one of the leaf nodes and serve as a first hop router for multicast traffic. At the router node, a message for flooding the network fabric may be sent based on an indication of communication of multicast traffic for a multicast group from a source device. The message may include at least one spine node identifier of at least one preferred spine node joined to the multicast group at the router node. The message may be for indicating, to at least one of the leaf nodes, to prioritize joining to the multicast group at the at least one preferred spine node according to at least one spine node identifier.

公开(公告)号：US20200280455A1

公开(公告)日：2020-09-03

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 ,  H04L12/773 ,  H04L12/761

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：US09325605B2

公开(公告)日：2016-04-26

申请号：US13835644

申请日：2013-03-15

Applicant: Cisco Technology, Inc.

Inventor： Stig Ingvar Venaas ,  Ijsbrand Wijnands

IPC: H04L12/761 ,  H04L12/18

CPC classification number: H04L45/16 ,  H04L12/18

Abstract: In one embodiment, a node in a communication network receives a request for messages of a particular group, determines a rendezvous point, and transmits the request to the rendezvous point to cause the rendezvous point to return a source-message indicating a source-node of the particular group. The node further creates a path from itself to the source-node and receives messages of the particular group according to the path.

Abstract translation: 在一个实施例中，通信网络中的节点接收对特定组的消息的请求，确定会合点，并将该请求发送到会合点，以使会合点返回指示源节点的源消息 特定组。 该节点进一步创建自己到源节点的路径，并根据路径接收特定组的消息。

公开(公告)号：US11811647B2

公开(公告)日：2023-11-07

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 ,  H04L65/611

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：US11632354B2

公开(公告)日：2023-04-18

申请号：US16117641

申请日：2018-08-30

Applicant: Cisco Technology, Inc.

Inventor： Stig Ingvar Venaas ,  Mahesh Sivakumar ,  Ijsbrand Wijnands ,  Mankamana Prasad Mishra

IPC: G06F15/16 ,  H04L61/59 ,  H04L12/46 ,  H04L45/00 ,  H04L49/201 ,  H04L61/103

Abstract: A disclosed method is performed at a first boundary node bordering a BIER domain. The method includes receiving a message associated with a source and group for multicast from outside the BIER domain. The method further includes generating an encapsulated message based on the message, a metric, and a first proxy address of the first boundary node. The method also includes forwarding the encapsulated message through the BIER domain to at least one second boundary node bordering the BIER domain and connectable to the first boundary node. The first boundary node additionally triggers the at least one second boundary node to decapsulate the encapsulated message for forwarding out of the first domain and store a record including the source, the group, the metric representing the cost of the first boundary node to the source, and the first proxy address on the at least one second boundary node.

公开(公告)号：US11558292B2

公开(公告)日：2023-01-17

申请号：US17347345

申请日：2021-06-14

Applicant: Cisco Technology, Inc.

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

IPC: H04L45/52 ,  H04L45/02 ,  H04L12/18 ,  H04L101/622

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：US11509494B2

公开(公告)日：2022-11-22

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

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：US11245618B2

公开(公告)日：2022-02-08

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: G06F15/173 ,  H04L12/721 ,  H04L12/761 ,  H04L12/733 ,  H04L12/911 ,  H04L12/741 ,  H04L12/801

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：US11082336B1

公开(公告)日：2021-08-03

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

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.