公开(公告)号：US11824797B1

公开(公告)日：2023-11-21

申请号：US17510982

申请日：2021-10-26

Applicant: Cisco Technology, Inc.

Inventor： Mankamana P. Mishra ,  Ali Sajassi ,  Arvind Venkateswaran ,  Jayashree Subramanian ,  Patrice Brissette ,  Satya Ranjan Mohanty

IPC: H04L49/201 ,  H04L49/354 ,  H04L61/103 ,  H04L45/24 ,  H04L45/00

CPC classification number: H04L49/201 ,  H04L45/20 ,  H04L45/24 ,  H04L49/354 ,  H04L61/103

Abstract: At a provider edge (PE) router of PE routers of an Ethernet virtual private network (EVPN) configured to implement a border gateway protocol (BGP): receiving, from a multicast receiver, a multicast join for multicast traffic originated from a multicast source; identifying a next hop PE router for the multicast source; generating an EVPN route to the PE router, the EVPN route including an EVPN instance-route target that identifies the EVPN, and a specifically targeted route target that identifies the next hop PE router and that is configured to override the EVPN instance-route target to cause only the next hop PE router, and not any other of the PE routers, to import the EVPN route, when the EVPN route is advertised across the EVPN to the PE routers; and advertising the EVPN route across the EVPN to the PE routers.

公开(公告)号：US20220173919A1

公开(公告)日：2022-06-02

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

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：US20220200814A1

公开(公告)日：2022-06-23

申请号：US17472774

申请日：2021-09-13

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Krishnaswamy Muddenahally Ananthamurthy ,  Jayashree Subramanian

IPC: H04L12/18 ,  H04L12/46 ,  H04L9/40 ,  H04L45/74 ,  H04L47/724 ,  H04L45/16

Abstract: A networking environment includes a first node and a second node configured as Ethernet Virtual Private Networking (EVPN) peers on an EVPN subnet that is coupled to a Layer 3 VPN over a core network. The first node receives a first multicast join request from a third node in the core network, the first multicast join request including a source address and multicast group address of a source of a multicast stream. The first node determines that the source address and the multicast group address for the source are behind the EVPN subnet at the second node. The first node sends to the second node, a control plane join request message that includes a receiver identifier that identifies the third node as a receiver of the multicast stream, the receiver identifier enabling the second node to forward the multicast stream directly into the core network to the third node.

公开(公告)号：US10826831B2

公开(公告)日：2020-11-03

申请号：US15992413

申请日：2018-05-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Mishra ,  Jayashree Subramanian ,  Stig Venaas ,  Nitin Kumar

IPC: H04L12/803 ,  H04L12/761

Abstract: A method including receiving, at a first router of a plurality of routers, a first message from the plurality of routers. The first message includes a designated router priority and a weight for each respective router. Based on the designated router priorities, a designated router is elected and a one or more eligible group designated routers are determined. The method determines whether the first router is the designated router or the at least one eligible group designated router. If the first router is the designated router, the first router provides a second message to the remaining routers indicating the eligible group designated routers and their weights.

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：US20190372898A1

公开(公告)日：2019-12-05

申请号：US15992413

申请日：2018-05-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Mishra ,  Jayashree Subramanian ,  Stig Venaas ,  Nitin Kumar

IPC: H04L12/803 ,  H04L12/761

Abstract: A method including receiving, at a first router of a plurality of routers, a first message from the plurality of routers. The first message includes a designated router priority and a weight for each respective router. Based on the designated router priorities, a designated router is elected and a one or more eligible group designated routers are determined. The method determines whether the first router is the designated router or the at least one eligible group designated router. If the first router is the designated router, the first router provides a second message to the remaining routers indicating the eligible group designated routers and their weights.

公开(公告)号：US20210336811A1

公开(公告)日：2021-10-28

申请号：US16858978

申请日：2020-04-27

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Krishnaswamy Muddenahally Ananthamurthy ,  Jayashree Subramanian

IPC: H04L12/18 ,  H04L12/46 ,  H04L12/761 ,  H04L12/741 ,  H04L12/913 ,  H04L29/06

Abstract: A networking environment includes a first node and a second node configured as Ethernet Virtual Private Networking (EVPN) peers on an EVPN subnet that is coupled to a Layer 3 VPN over a core network. The first node receives a first multicast join request from a third node in the core network, the first multicast join request including a source address and multicast group address of a source of a multicast stream. The first node determines that the source address and the multicast group address for the source are behind the EVPN subnet at the second node. The first node sends to the second node, a control plane join request message that includes a receiver identifier that identifies the third node as a receiver of the multicast stream, the receiver identifier enabling the second node to forward the multicast stream directly into the core network to the third node.

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：US11811546B2

公开(公告)日：2023-11-07

申请号：US17472774

申请日：2021-09-13

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Ali Sajassi ,  Ijsbrand Wijnands ,  Krishnaswamy Muddenahally Ananthamurthy ,  Jayashree Subramanian

IPC: H04L12/18 ,  H04L12/46 ,  H04L9/40 ,  H04L45/74 ,  H04L47/724 ,  H04L45/16

CPC classification number: H04L12/185 ,  H04L12/4641 ,  H04L45/16 ,  H04L45/74 ,  H04L47/724 ,  H04L63/0272

Abstract: A networking environment includes a first node and a second node configured as Ethernet Virtual Private Networking (EVPN) peers on an EVPN subnet that is coupled to a Layer 3 VPN over a core network. The first node receives a first multicast join request from a third node in the core network, the first multicast join request including a source address and multicast group address of a source of a multicast stream. The first node determines that the source address and the multicast group address for the source are behind the EVPN subnet at the second node. The first node sends to the second node, a control plane join request message that includes a receiver identifier that identifies the third node as a receiver of the multicast stream, the receiver identifier enabling the second node to forward the multicast stream directly into the core network to the third node.

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.