公开(公告)号：US10951527B2

公开(公告)日：2021-03-16

申请号：US16235874

申请日：2018-12-28

Applicant: Juniper Networks, Inc.

Inventor： Anuj Kumar Srivastava ,  Gary Goldman ,  Harshad B Agashe ,  Dinesh Jaiswal ,  Piyush Jain ,  Naveen K Jain

IPC: H04L12/801 ,  H04L12/947

Abstract: An ingress fabric endpoint coupled to a switch fabric within a network device reorders packet flows based on congestion status. In one example, the ingress fabric endpoint receives packet flows for switching across the switch fabric. The ingress fabric endpoint assigns each packet for each packet flow to a fast path or a slow path for packet switching. The ingress fabric endpoint processes, to generate a stream of cells for switching across the switch fabric, packets from the fast path and the slow path to maintain a first-in-first-out ordering of the packets within each packet flow. The ingress fabric endpoint switches a packet of a first packet flow after switching a packet of a second packet flow despite receiving the packet of the first packet flow before the packet of the second packet flow.

公开(公告)号：US20200213232A1

公开(公告)日：2020-07-02

申请号：US16235874

申请日：2018-12-28

Applicant: Juniper Networks, Inc.

Inventor： Anuj Kumar Srivastava ,  Gary Goldman ,  Harshad B. Agashe ,  Dinesh Jaiswal ,  Piyush Jain ,  Naveen K. Jain

IPC: H04L12/801 ,  H04L12/947

Abstract: An ingress fabric endpoint coupled to a switch fabric within a network device reorders packet flows based on congestion status. In one example, the ingress fabric endpoint receives packet flows for switching across the switch fabric. The ingress fabric endpoint assigns each packet for each packet flow to a fast path or a slow path for packet switching. The ingress fabric endpoint processes, to generate a stream of cells for switching across the switch fabric, packets from the fast path and the slow path to maintain a first-in-first-out ordering of the packets within each packet flow. The ingress fabric endpoint switches a packet of a first packet flow after switching a packet of a second packet flow despite receiving the packet of the first packet flow before the packet of the second packet flow.

公开(公告)号：US11070474B1

公开(公告)日：2021-07-20

申请号：US16166944

申请日：2018-10-22

Applicant: Juniper Networks, Inc.

Inventor： Piyush Jain ,  Anuj Kumar Srivastava ,  Naveen K Jain ,  Dinesh Jaiswal ,  Harshad B Agashe

IPC: H04L12/937 ,  H04L12/803 ,  H04L12/933 ,  H04L12/741

Abstract: A network device includes a memory, a plurality of packet processors, a switch fabric coupling the plurality of processors, and processing circuitry. The processing circuitry is configured to receive a data stream to be transmitted on a switch fabric and determine a plurality of credit counts, each credit count being assigned to a respective subchannel of a plurality of subchannels. The packet processor is further configured to determine per-subchannel occupancy of the memory for the plurality of subchannels, select, based on the plurality of credit counts and the per-subchannel occupancy of the memory, a subchannel of the plurality of subchannels for transmitting a cell of a plurality of cells for the data stream, and output data for the cell to the memory for output by the selected subchannel.

公开(公告)号：US20210194809A1

公开(公告)日：2021-06-24

申请号：US17249723

申请日：2021-03-10

Applicant: Juniper Networks, Inc.

Inventor： Anuj Kumar Srivastava ,  Gary Goldman ,  Harshad B. Agashe ,  Dinesh Jaiswal ,  Piyush Jain ,  Naveen K. Jain

IPC: H04L12/801 ,  H04L12/947

Abstract: An ingress fabric endpoint coupled to a switch fabric within a network device reorders packet flows based on congestion status. In one example, the ingress fabric endpoint receives packet flows for switching across the switch fabric. The ingress fabric endpoint assigns each packet for each packet flow to a fast path or a slow path for packet switching. The ingress fabric endpoint processes, to generate a stream of cells for switching across the switch fabric, packets from the fast path and the slow path to maintain a first-in-first-out ordering of the packets within each packet flow. The ingress fabric endpoint switches a packet of a first packet flow after switching a packet of a second packet flow despite receiving the packet of the first packet flow before the packet of the second packet flow.

公开(公告)号：US11496398B2

公开(公告)日：2022-11-08

申请号：US17249723

申请日：2021-03-10

Applicant: Juniper Networks, Inc.

Inventor： Anuj Kumar Srivastava ,  Gary Goldman ,  Harshad B Agashe ,  Dinesh Jaiswal ,  Piyush Jain ,  Naveen K Jain

IPC: H04L47/12 ,  H04L49/25

Abstract: An ingress fabric endpoint coupled to a switch fabric within a network device reorders packet flows based on congestion status. In one example, the ingress fabric endpoint receives packet flows for switching across the switch fabric. The ingress fabric endpoint assigns each packet for each packet flow to a fast path or a slow path for packet switching. The ingress fabric endpoint processes, to generate a stream of cells for switching across the switch fabric, packets from the fast path and the slow path to maintain a first-in-first-out ordering of the packets within each packet flow. The ingress fabric endpoint switches a packet of a first packet flow after switching a packet of a second packet flow despite receiving the packet of the first packet flow before the packet of the second packet flow.

公开(公告)号：US09985912B1

公开(公告)日：2018-05-29

申请号：US14871706

申请日：2015-09-30

Applicant: Juniper Networks, Inc.

Inventor： Rahul Wagh ,  Kapil Suri ,  Gurjeet Singh ,  Harshad B Agashe ,  Srihari R. Vegesna ,  Dinesh Jaiswal

IPC: H04L12/861 ,  H04L12/935 ,  H04L12/801 ,  H04L12/933

CPC classification number: H04L49/30 ,  H04L47/18 ,  H04L49/1569 ,  H04L49/1576

Abstract: A system and method of transferring cells through a switch fabric having a shared memory crossbar switch, a plurality of cell receive blocks and a plurality of cell transmit blocks. The system determines, based on a number of cells queued up in respective output buffers in the cell transmit blocks, output buffers in the cell transmit blocks that can receive cells on a low latency path. The cells transferred include first cells that can be transferred on the low latency path and second cells that cannot be transferred via the low latency path. The first cells are transferred via a bypass mechanism in shared memory to the output buffers. The second cells are transferred by writing the second cells to shared memory, reading the second cells from shared memory and transferring the second cells read from shared memory to the output buffers in the cell transmit blocks.