公开(公告)号：US20230090072A1

公开(公告)日：2023-03-23

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

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：US20240314060A1

公开(公告)日：2024-09-19

申请号：US18324574

申请日：2023-05-26

Applicant: Cisco Technology, Inc.

Inventor： Krishnaswamy Ananthamurthy ,  Lukas Krattiger ,  Ali Sajassi

IPC: H04L45/021 ,  H04L45/00 ,  H04L45/586

CPC classification number: H04L45/021 ,  H04L45/586 ,  H04L45/66

Abstract: A method includes creating a first routing table at each of a plurality of provider edge nodes in a first data center, the first routing table including a first sequence number tracking intra-data center movement of the host connected to one of the plurality of provider edge nodes; creating a second routing table at a corresponding gateway of each of a plurality of data centers, the plurality of data centers including the first data center, the second routing table including the first sequence number for the host and a second sequence number for tracking inter-data center movement of the host between the plurality of data centers host; and updating one of (1) the first sequence number when the host makes an intra-data center move, or (2) the second sequence number in the second routing table when the host makes an inter-data center move.

公开(公告)号：US10855579B2

公开(公告)日：2020-12-01

申请号：US16268953

申请日：2019-02-06

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Pascal Thubert ,  IJsbrand Wijnands ,  Krishnaswamy Ananthamurthy ,  Ramakrishnan Chokkanathapuram Sundaram ,  Stig Ingvar Venaas

IPC: H04L12/28 ,  H04L12/721 ,  H04L12/761 ,  H04L12/749 ,  H04L12/755 ,  H04L12/753

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

公开(公告)号：US11509572B2

公开(公告)日：2022-11-22

申请号：US17038204

申请日：2020-09-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Pascal Thubert ,  Ijsbrand Wijnands ,  Krishnaswamy Ananthamurthy ,  Ramakrishnan Chokkanathapuram Sundaram ,  Stig Ingvar Venaas

IPC: H04L12/28 ,  H04L45/00 ,  H04L45/16 ,  H04L45/741 ,  H04L45/021 ,  H04L45/48

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

公开(公告)号：US10924434B2

公开(公告)日：2021-02-16

申请号：US16417739

申请日：2019-05-21

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Mishra ,  Krishnaswamy Ananthamurthy ,  Stig Venaas ,  Rishabh Parekh ,  Sameer Gulrajani

IPC: H04L12/26 ,  H04L12/947 ,  H04L12/753 ,  H04L12/18 ,  H04L12/703 ,  H04L12/761

Abstract: In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.

公开(公告)号：US20190273699A1

公开(公告)日：2019-09-05

申请号：US16417739

申请日：2019-05-21

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Mishra ,  Krishnaswamy Ananthamurthy ,  Stig Venaas ,  Rishabh Parekh ,  Sameer Gulrajani

IPC: H04L12/947 ,  H04L12/753 ,  H04L12/18

Abstract: In one embodiment, a first Protocol Independent Multicast (PIM) router includes port interfaces to receive multicast traffic from a first network and forward the traffic to at least one receiver, which is in a sub-network including other PIM routers, and a routing processor configured, in response to a decision for the first PIM router to relinquish being a designated router, to generate a PIM Hello message with a first option descriptor and a first priority, the first option descriptor indicating a staggered handoff process, and send the PIM Hello message, receipt of the PIM Hello message by the other PIM routers being operative to result in a designated router election electing a new designated router, the new designated router being operative to initiate the staggered handoff process causing the first PIM router to continue forwarding traffic until the new designated router has built a multicast routing tree.

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：US20210014159A1

公开(公告)日：2021-01-14

申请号：US17038204

申请日：2020-09-30

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Pascal Thubert ,  IJsbrand Wijnands ,  Krishnaswamy Ananthamurthy ,  Ramakrishnan Chokkanathapuram Sundaram ,  Stig Ingvar Venaas

IPC: H04L12/721 ,  H04L12/761 ,  H04L12/749 ,  H04L12/755 ,  H04L12/753

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

公开(公告)号：US20200252333A1

公开(公告)日：2020-08-06

申请号：US16268953

申请日：2019-02-06

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Prasad Mishra ,  Pascal Thubert ,  IJsbrand Wijnands ,  Krishnaswamy Ananthamurthy ,  Ramakrishnan Chokkanathapuram Sundaram ,  Stig Ingvar Venaas

IPC: H04L12/721 ,  H04L12/761 ,  H04L12/753 ,  H04L12/755 ,  H04L12/749

Abstract: In one illustrative example, a network node connected in a network fabric may identify that it is established as part of a multicast distribution tree for forwarding multicast traffic from a source node to one or more host receiver devices of a multicast group. In response, the network node may propagate in the network fabric a message for advertising the network node as a candidate local source node at which to join the multicast group. The message for advertising may include data such as a reachability metric. The propagation of the message may be part of a flooding of such messages in the network fabric. The network node serving as the candidate local source node may thereafter “locally” join a host receiver device in the multicast group at the network node so that the device may receive the multicast traffic from the source node via the network node.

公开(公告)号：US20240259288A1

公开(公告)日：2024-08-01

申请号：US18102460

申请日：2023-01-27

Applicant: Cisco Technology, Inc.

Inventor： Mankamana Mishra ,  Praveen Bhagwatula ,  Nitin Kumar ,  Krishnaswamy Ananthamurthy

IPC: H04L43/12 ,  H04L12/18 ,  H04L43/06

CPC classification number: H04L43/12 ,  H04L12/18 ,  H04L43/06

Abstract: In-band network telemetry for multicast is provided by injecting a synthetic telemetry packet into the multicast. Each first node of each branch replicates the synthetic packet and passes on copy to the next branch and sends one copy down the nodes in the branch sequentially. The synthetic telemetry packet can include flags with have values, including, for example, whether each node should hold or send data collected by the node according to the synthetic data packet, how long a node is to hold collected telemetry data, and what data to collect. The node sends a postcard to the originator with the telemetry data according to the instructions in the synthetic telemetry packet.