Patents by Inventor Ravindran Rajarao

Ravindran Rajarao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Redundant multicast trees without duplication and with fast recovery
    Patent number: 11716216
    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.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: August 1, 2023
    Assignee: Cisco Technology, Inc.
    Inventors: Mankamana Prasad Mishra, Jayashree Subramanian, Stig Ingvar Venaas, Rishabh Parekh, Ravindran Rajarao
  • REDUNDANT MULTICAST TREES WITHOUT DUPLICATION AND WITH FAST RECOVERY
    Publication number: 20220173919
    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.
    Type: Application
    Filed: February 15, 2022
    Publication date: June 2, 2022
    Inventors: Mankamana Prasad Mishra, Jayashree Subramanian, Stig Ingvar Venaas, Rishabh Parekh, Ravindran Rajarao
  • Redundant multicast trees without duplication and with fast recovery
    Patent number: 11296899
    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.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: April 5, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Mankamana Prasad Mishra, Jayashree Subramanian, Stig Ingvar Venaas, Rishabh Parekh, Ravindran Rajarao
  • REDUNDANT MULTICAST TREES WITHOUT DUPLICATION AND WITH FAST RECOVERY
    Publication number: 20200280455
    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.
    Type: Application
    Filed: February 28, 2019
    Publication date: September 3, 2020
    Inventors: Mankamana Prasad Mishra, Jayashree Subramanian, Stig Ingvar Venaas, Rishabh Parekh, Ravindran Rajarao