公开(公告)号：US20210203612A1

公开(公告)日：2021-07-01

申请号：US16730031

申请日：2019-12-30

申请人： Juniper Networks, Inc.

发明人： Senthil Duraisamy ,  Harshad B. Agashe

IPC分类号： H04L12/863 ,  H04L12/933 ,  H04L12/935

摘要： In general, techniques are described for facilitating balanced cell handling by fabric cores of a fabric plane for an internal device switch fabric. In some examples, a routing system includes a plurality of fabric endpoints and a switching fabric comprising a fabric plane to switch cells among the fabric endpoints. The fabric plane includes two fabric cores and one or more inter-core links connecting the fabric cores. Each fabric core selects an output port of the fabric core to which to route a received cell of the cells based on (i) an input port of the fabric core on which the received cell was received and (ii) a destination fabric endpoint for the received cell, at least a portion of the selected output ports being connected to the inter-core links, and switches the received cell to the selected output port.

公开(公告)号：US11558775B2

公开(公告)日：2023-01-17

申请号：US17176754

申请日：2021-02-16

申请人： Juniper Networks, Inc.

发明人： Craig R. Frink ,  Anurag P. Gupta ,  Harshad B. Agashe ,  Weidong Xu

IPC分类号： H04W28/02 ,  H04L12/867 ,  H04L12/873 ,  H04L47/52 ,  H04L47/629

摘要： A network device may receive packets and may calculate, during a time interval, an arrival rate and a departure rate, of the packets, at one of multiple virtual output queues. The network device may calculate a current oversubscription factor based on the arrival rate and the departure rate, and may calculate a target oversubscription factor based on an average of previous oversubscription factors associated with the multiple virtual output queues. The network device may determine whether a difference exists between the target oversubscription factor and the current oversubscription factor and may calculate, when the difference exists, a scale factor based on the current oversubscription factor and the target oversubscription factor. The network device may calculate new scheduling weights based on prior scheduling weights and the scale factor, and may process packets received by the multiple virtual output queues based on the new scheduling weights.

公开(公告)号：US20200213232A1

公开(公告)日：2020-07-02

申请号：US16235874

申请日：2018-12-28

申请人： Juniper Networks, Inc.

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

IPC分类号： H04L12/801 ,  H04L12/947

摘要： 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：US11902827B2

公开(公告)日：2024-02-13

申请号：US18065058

申请日：2022-12-13

申请人： Juniper Networks, Inc.

发明人： Craig R. Frink ,  Anurag P. Gupta ,  Harshad B. Agashe ,  Weidong Xu

IPC分类号： H04W28/02 ,  H04L47/52 ,  H04L47/629

CPC分类号： H04W28/0289 ,  H04L47/52 ,  H04L47/629 ,  H04W28/0273 ,  H04W28/0284

摘要： A network device may receive packets and may calculate, during a time interval, an arrival rate and a departure rate, of the packets, at one of multiple virtual output queues. The network device may calculate a current oversubscription factor based on the arrival rate and the departure rate, and may calculate a target oversubscription factor based on an average of previous oversubscription factors associated with the multiple virtual output queues. The network device may determine whether a difference exists between the target oversubscription factor and the current oversubscription factor and may calculate, when the difference exists, a scale factor based on the current oversubscription factor and the target oversubscription factor. The network device may calculate new scheduling weights based on prior scheduling weights and the scale factor, and may process packets received by the multiple virtual output queues based on the new scheduling weights.

公开(公告)号：US20210194809A1

公开(公告)日：2021-06-24

申请号：US17249723

申请日：2021-03-10

申请人： Juniper Networks, Inc.

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

IPC分类号： H04L12/801 ,  H04L12/947

摘要： 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：US20210176171A1

公开(公告)日：2021-06-10

申请号：US16709611

申请日：2019-12-10

申请人： Juniper Networks, Inc.

发明人： Craig R. Frink ,  Weidong Xu ,  Anurag P. Gupta ,  Harshad B. Agashe

IPC分类号： H04L12/721 ,  H04L12/713 ,  H04L12/741 ,  H04L12/861 ,  G06F9/48

摘要： An apparatus for switching network traffic includes an ingress packet forwarding engine and an egress packet forwarding engine. The ingress packet forwarding engine is configured to determine, in response to receiving a network packet, an egress packet forwarding engine for outputting the network packet and enqueue the network packet in a virtual output queue. The egress packet forwarding engine is configured to output, in response to a first scheduling event and to the ingress packet forwarding engine, information indicating the network packet in the virtual output queue and that the network packet is to be enqueued at an output queue for an output port of the egress packet forwarding engine. The ingress packet forwarding engine is further configured to dequeue, in response to receiving the information, the network packet from the virtual output queue and enqueue the network packet to the output queue.