公开(公告)号：US11558775B2

公开(公告)日：2023-01-17

申请号：US17176754

申请日：2021-02-16

Applicant: Juniper Networks, Inc.

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

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

Abstract: 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：US11240151B2

公开(公告)日：2022-02-01

申请号：US16709611

申请日：2019-12-10

Applicant: Juniper Networks, Inc.

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

IPC: H04L12/28 ,  H04L12/721 ,  G06F9/48 ,  H04L12/713 ,  H04L12/741 ,  H04L12/861 ,  H04L12/70

Abstract: 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.

公开(公告)号：US09116814B1

公开(公告)日：2015-08-25

申请号：US14092072

申请日：2013-11-27

Applicant: JUNIPER NETWORKS, INC.

Inventor： Jianhui Huang ,  Sharada Yeluri ,  Jean-Marc Frailong ,  Jeffrey G. Libby ,  Anurag P. Gupta ,  Paul Coelho

IPC: G06F12/00 ,  G06F12/08 ,  G06F12/12

CPC classification number: G06F12/0855 ,  G06F12/0815 ,  G06F12/0868 ,  G06F12/0891 ,  G06F12/12 ,  Y02D10/13

Abstract: A data read/write system includes a system clock, a single port memory, a cache memory that is separate from the single port memory, and a controller coupled to an instruction pipeline. The controller receives, via the instruction pipeline, first data to write to an address of the single port memory, and further receives, via the instruction pipeline, a request to read second data from the single port memory. The controller stores the first data in the cache memory, and retrieves the second data from either the cache memory or the single port memory during one or more first clock cycles of the system clock. The controller copies the first data from the cache memory and stores the first data at the address in the single port memory during a second clock cycle of the system clock that is different than the one or more first clock cycles.

Abstract translation: 数据读/写系统包括系统时钟，单端口存储器，与单端口存储器分开的高速缓存存储器，以及耦合到指令流水线的控制器。 控制器经由指令流水线接收第一数据以写入单端口存储器的地址，并且经由指令流水线接收从单端口存储器读取第二数据的请求。 控制器将第一数据存储在高速缓冲存储器中，并且在系统时钟的一个或多个第一时钟周期期间从高速缓冲存储器或单端口存储器检索第二数据。 控制器从高速缓冲存储器复制第一数据，并且在系统时钟的不同于一个或多个第一时钟周期的第二时钟周期期间将第一数据存储在单端口存储器中的地址处。

公开(公告)号：US11784925B2

公开(公告)日：2023-10-10

申请号：US17645498

申请日：2021-12-22

Applicant: Juniper Networks, Inc.

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

IPC: H04L45/00 ,  H04L45/586 ,  H04L45/74 ,  H04L49/90 ,  G06F9/48 ,  H04L49/9047 ,  H04L12/70

CPC classification number: H04L45/566 ,  G06F9/4887 ,  H04L45/586 ,  H04L45/74 ,  H04L49/9036 ,  H04L49/9047 ,  H04L2012/5681

Abstract: 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.

公开(公告)号：US11902827B2

公开(公告)日：2024-02-13

申请号：US18065058

申请日：2022-12-13

Applicant: Juniper Networks, Inc.

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

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

CPC classification number: H04W28/0289 ,  H04L47/52 ,  H04L47/629 ,  H04W28/0273 ,  H04W28/0284

Abstract: 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：US20220124030A1

公开(公告)日：2022-04-21

申请号：US17645498

申请日：2021-12-22

Applicant: Juniper Networks, Inc.

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

IPC: H04L45/00 ,  G06F9/48 ,  H04L45/586 ,  H04L45/74 ,  H04L49/90 ,  H04L49/9047

Abstract: 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.

公开(公告)号：US20210176171A1

公开(公告)日：2021-06-10

申请号：US16709611

申请日：2019-12-10

Applicant: Juniper Networks, Inc.

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

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

Abstract: 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.

公开(公告)号：US08813015B2

公开(公告)日：2014-08-19

申请号：US13725215

申请日：2012-12-21

Applicant: Juniper Networks, Inc.

Inventor： Srinivas Vaduvatha ,  Srinivas Venkataraman ,  Anurag P. Gupta ,  Praveen Garapally ,  Norman Bristol ,  Dibyendu Sen

IPC: G06F17/50 ,  G06F12/00 ,  G06F13/40

CPC classification number: G06F12/00 ,  G06F13/409

Abstract: A system includes a memory and a controller. The controller may include a group of pads and an allocation register. The controller is configured to receive input signals corresponding to the group and allocate each one of the pads to output one of the input signals based on a configuration of pins of the memory. The controller is also configured to redirect the input signals, within the controller, based on the allocation of the pads and output the input signals from the controller into the pads.

Abstract translation: 系统包括存储器和控制器。 控制器可以包括一组焊盘和分配寄存器。 控制器被配置为接收对应于组的输入信号，并且基于存储器的引脚的配置来分配每个焊盘以输出输入信号之一。 控制器还被配置为基于焊盘的分配来重定向控制器内的输入信号，并将输入信号从控制器输出到焊盘中。