公开(公告)号：US10547467B2

公开(公告)日：2020-01-28

申请号：US15792180

申请日：2017-10-24

Applicant: Cisco Technology, Inc.

Inventor： Sanjay Kumar Hooda ,  Prakash C. Jain ,  Rishabh Parekh ,  Atri Indiresan ,  Satish Kondalam ,  Victor Moreno

IPC: H04L12/18 ,  H04L29/12 ,  H04L29/06 ,  H04L12/853

Abstract: A method including determining that network traffic being transmitted is unicast or multicast; mapping to which virtual network and locator address each host belongs; generating leaking data for unicast and multicast traffic, wherein the leaking data indicates that a first virtual network leaks traffic to a second virtual network; receiving a request from the second virtual network to receive traffic from a host in the first virtual network; determining, based on the leaking data and the type of traffic being transmitted, if the first virtual network leaks traffic to the second virtual network; if the first virtual network leaks traffic to the second virtual network, determining a locator address for the host in the first virtual network using the mapping data; and transmitting the locator address for the host to the second virtual network to enable traffic leaking from the host to the second virtual network is disclosed.

公开(公告)号：US10348647B2

公开(公告)日：2019-07-09

申请号：US15839886

申请日：2017-12-13

Applicant: Cisco Technology, Inc.

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

IPC: H04L12/26 ,  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：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：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：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：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：US11368324B2

公开(公告)日：2022-06-21

申请号：US16778669

申请日：2020-01-31

Applicant: Cisco Technology, Inc.

Inventor： Ramakrishnan Chokkanathapuram Sundaram ,  Kesavan Thiruvenkatasamy ,  Rishabh Parekh ,  Raunak Banthia

IPC: H04L12/18 ,  H04L45/02 ,  H04L49/201

Abstract: Techniques for improving convergence of Protocol Independent Multicast assert state information in multicast groups include forwarding, by a router, a PIM join message originating from a destination host and stores distribution tree information based on the join message. The method further includes participating, by the router, in a Protocol Independent Multicast (“PIM”) assert election among a plurality of routers and storing, by the router, PIM assert state information based on an outcome of the PIM assert election. The method further includes acquiring, by the router, routing information base (“RIB”) convergence. The method further includes triggering by the router, or causing, by the router, another router to trigger, a PIM assert among the plurality of routers. The method further includes re-converging, by the router, with PIM assert states among the plurality of routers and storing, by the router, converged PIM assert state information.

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：US11843472B2

公开(公告)日：2023-12-12

申请号：US17844589

申请日：2022-06-20

Applicant: Cisco Technology, Inc.

Inventor： Ramakrishnan Chokkanathapuram Sundaram ,  Kesavan Thiruvenkatasamy ,  Rishabh Parekh ,  Raunak Banthia

IPC: H04L12/18 ,  H04L45/02 ,  H04L49/201

CPC classification number: H04L12/185 ,  H04L45/02 ,  H04L49/201

Abstract: This disclosure describes techniques for improving convergence of Protocol Independent Multicast assert state information in multicast groups. A method includes forwarding, by a router, a PIM join message originating from a destination host and stores distribution tree information based on the join message. The method further includes participating, by the router, in a Protocol Independent Multicast (“PIM”) assert election among a plurality of routers and storing, by the router, PIM assert state information based on an outcome of the PIM assert election. The method further includes acquiring, by the router, routing information base (“RIB”) convergence. The method further includes triggering by the router, or causing, by the router, another router to trigger, a PIM assert among the plurality of routers. The method further includes re-converging, by the router, with PIM assert states among the plurality of routers and storing, by the router, converged PIM assert state information.

公开(公告)号：US20220321367A1

公开(公告)日：2022-10-06

申请号：US17844589

申请日：2022-06-20

Applicant: Cisco Technology, Inc.

Inventor： Ramakrishnan Chokkanathapuram Sundaram ,  Kesavan Thiruvenkatasamy ,  Rishabh Parekh ,  Raunak Banthia

IPC: H04L12/18 ,  H04L45/02 ,  H04L49/201

Abstract: This disclosure describes techniques for improving convergence of Protocol Independent Multicast assert state information in multicast groups. A method includes forwarding, by a router, a PIM join message originating from a destination host and stores distribution tree information based on the join message. The method further includes participating, by the router, in a Protocol Independent Multicast (“PIM”) assert election among a plurality of routers and storing, by the router, PIM assert state information based on an outcome of the PIM assert election. The method further includes acquiring, by the router, routing information base (“RIB”) convergence. The method further includes triggering by the router, or causing, by the router, another router to trigger, a PIM assert among the plurality of routers. The method further includes re-converging, by the router, with PIM assert states among the plurality of routers and storing, by the router, converged PIM assert state information.