公开(公告)号：US10958564B1

公开(公告)日：2021-03-23

申请号：US16216974

申请日：2018-12-11

Applicant: Juniper Networks, Inc.

Inventor： Abhishek Asthana ,  Abhishek Chakraborty ,  Rajesh Shetty Manur ,  Joya Neema

IPC: H04L12/761 ,  H04L12/753 ,  H04L12/715 ,  H04L12/707 ,  H04L12/733 ,  H04L12/703 ,  H04L12/18

Abstract: Multiple Register State Machines on a rendezvous point router (“RP”) in a Protocol Independent Multicast-Sparse Mode (“PIM-SM”) domain per (S,G) is supported, thereby increasing the Register state consistency and faster convergence in case of a first hop router (“FHR”) failure. Such example embodiments may advantageously eliminate the limitation of a single Register State Machine on RP for a given (S,G), in the presence of multiple FHRs connected to the same source. At least some such example embodiments provide the capability of maintaining multiple Register State Machines on RP for a given (S,G), in a way, that maps one Register State Machine to each FHR. In this way, the RP can avoid the inconsistent FHR states and traffic losses caused due to FHR failures.

公开(公告)号：US10728137B1

公开(公告)日：2020-07-28

申请号：US16147008

申请日：2018-09-28

Applicant: Juniper Networks, Inc.

Inventor： Abhishek Chakraborty ,  Abhishek Asthana ,  Jagathpathi Dasararaju ,  Joya Neema ,  Rajesh Shetty Manur

IPC: H04L12/751 ,  H04L12/761

Abstract: The potential problem of traffic loss during a period when a second PIM router is elected DR after a first PIM router (on the same PIM interface) was previously elected DR and is transiting multicast traffic, is solved by (1) configuring a first interval on a PIM interface for at least the first PIM router; (2) responsive to the PIM interface of the first PIM router booting up, (i) starting, by the first PIM router, a timer corresponding to the configured first interval, (ii) determining, by the first PIM router, whether or not it is the DR on the PIM interface, (iii) upon determining that the timer has expired, redetermining, by the first PIM router, whether or not it is the DR on the PIM interface, and (iv) responsive to a redetermination that the first PIM router is the DR on the PIM interface, (A) increasing, by the first PIM router, a DR priority value of the first PIM router to reduce a likelihood that another of the at least two PIM routers will replace the first PIM router as DR, and (B) sending on the PIM interface, by the first PIM router, a PIM HELLO message including the increased DR priority value.

公开(公告)号：US20210392009A1

公开(公告)日：2021-12-16

申请号：US17247866

申请日：2020-12-28

Applicant: Juniper Networks, Inc.

Inventor： Alisha Jyoti ,  Vrushank Vipul Upadhyay ,  Abhishek Chakraborty ,  Joya Neema

IPC: H04L12/18 ,  H04W8/00 ,  H04W4/06 ,  H04L12/705

Abstract: The disclosure describes techniques for enhancements to the Multicast Source Discovery Protocol (MSDP) to reduce Source Active (SA) message loops in one or more multicast domains having overlapping MSDP mesh groups. In some examples, a method includes receiving, by a first MSDP speaker, from a second MSDP speaker, a SA message. The method also includes, when the second MSDP speaker is in a mesh group with the first MSDP speaker, determining whether the first MSDP speaker includes an active SA state corresponding to the SA message. Additionally, the method includes, when the first MSDP speaker does not include the active SA state corresponding to the SA message, accepting the SA message and forwarding the SA message to a third MSDP speaker that is not in the mesh group with the first MSDP speaker and the second MSDP speaker.

公开(公告)号：US11582054B2

公开(公告)日：2023-02-14

申请号：US17247866

申请日：2020-12-28

Applicant: Juniper Networks, Inc.

Inventor： Alisha Jyoti ,  Vrushank Vipul Upadhyay ,  Abhishek Chakraborty ,  Joya Neema

IPC: H04L12/18 ,  H04W8/00 ,  H04L45/18 ,  H04W4/06

Abstract: The disclosure describes techniques for enhancements to the Multicast Source Discovery Protocol (MSDP) to reduce Source Active (SA) message loops in one or more multicast domains having overlapping MSDP mesh groups. In some examples, a method includes receiving, by a first MSDP speaker, from a second MSDP speaker, a SA message. The method also includes, when the second MSDP speaker is in a mesh group with the first MSDP speaker, determining whether the first MSDP speaker includes an active SA state corresponding to the SA message. Additionally, the method includes, when the first MSDP speaker does not include the active SA state corresponding to the SA message, accepting the SA message and forwarding the SA message to a third MSDP speaker that is not in the mesh group with the first MSDP speaker and the second MSDP speaker.

公开(公告)号：US11088939B1

公开(公告)日：2021-08-10

申请号：US16166571

申请日：2018-10-22

Applicant: Juniper Networks, Inc.

Inventor： Rajesh Shetty Manur ,  Shraddha Hegde ,  Abhishek Chakraborty

IPC: H04L12/721 ,  H04L12/751 ,  H04L12/801

Abstract: A first network device may determine that a link-state database (LSDB), associated with the first network device, includes a first link-state advertisement (LSA) instance associated with a second network device. The first network device may determine that the first network device has not received a second LSA instance, associated with the second network device, that does not include information identifying a fully adjacent link between the second network device and the first network device. The first network device may receive the second LSA instance associated with the second network device and may transmit, to the second network device, a third LSA instance, associated with the first network device, that includes the information identifying the fully adjacent link between the second network device and the first network device, only after the second LSA instance is received.

公开(公告)号：US10735313B2

公开(公告)日：2020-08-04

申请号：US16167184

申请日：2018-10-22

Applicant: Juniper Networks, Inc.

Inventor： Bharath RadhaKrishna Bhat ,  Rajesh Shetty Manur ,  Abhishek Chakraborty ,  Shraddha Hegde

IPC: H04L12/28 ,  H04L12/703 ,  H04L12/751 ,  H04L12/707 ,  H04L12/24 ,  H04L12/727 ,  H04J1/16

Abstract: A first network device detects a link down event associated with a second network device, where the link down event is detected by the first network device prior to being detected by a third network device, and the second network device is a designated network device of a network. The first network device starts a delay timer before processing the link down event, and detects an event that includes at least one of receipt, from the third network device, of a link state advertisement message based on the link down event, or an expiration of the delay timer. The first network device determines the first network device to be a new designated network device for the network based on detecting the event, and provides, to the third network device, information indicating that the first network device is the new designated network device for the network.

公开(公告)号：US20200127918A1

公开(公告)日：2020-04-23

申请号：US16167184

申请日：2018-10-22

Applicant: Juniper Networks, Inc.

Inventor： Bharath RadhaKrishna Bhat ,  Rajesh Shetty Manur ,  Abhishek Chakraborty ,  Shraddha Hegde

IPC: H04L12/703 ,  H04L12/751 ,  H04L12/727 ,  H04L12/24 ,  H04L12/707

Abstract: A first network device detects a link down event associated with a second network device, where the link down event is detected by the first network device prior to being detected by a third network device, and the second network device is a designated network device of a network. The first network device starts a delay timer before processing the link down event, and detects an event that includes at least one of receipt, from the third network device, of a link state advertisement message based on the link down event, or an expiration of the delay timer. The first network device determines the first network device to be a new designated network device for the network based on detecting the event, and provides, to the third network device, information indicating that the first network device is the new designated network device for the network.