公开(公告)号：US09379978B2

公开(公告)日：2016-06-28

申请号：US14808149

申请日：2015-07-24

Applicant: Cisco Technology, Inc.

Inventor： Alessandro Fulli ,  Putu Harry Subagio ,  Chih-Tsung Huang

IPC: H04L12/745 ,  H04L12/741 ,  H04L29/06 ,  H04L29/12 ,  H04L12/727

CPC classification number: H04L45/745 ,  H04L29/0653 ,  H04L45/121 ,  H04L45/74 ,  H04L61/2521 ,  H04L69/161 ,  H04L69/22

Abstract: A packet is received at an ingress port of a networking device and a forwarding result that identifies an egress port for the packet is generated. In parallel with the generation of the forwarding result, a network address translation (NAT) result that identifies one or more NAT rules for possible application to the packet is generated. The forwarding result and the NAT result are then used to generate a routing decision result.

公开(公告)号：US20150236982A1

公开(公告)日：2015-08-20

申请号：US14702186

申请日：2015-05-01

Applicant: Cisco Technology, Inc.

Inventor： Thomas J. Edsall ,  Putu Harry Subagio ,  Alessandro Fulli ,  Christopher A. Wildman ,  Mingzhe Li ,  Wei-Jen Huang ,  Chih-Tsung Huang

IPC: H04L12/947 ,  H04L12/741 ,  H04L12/861 ,  H04L29/06 ,  H04L12/26

CPC classification number: H04L49/25 ,  H04L29/0653 ,  H04L43/04 ,  H04L45/74 ,  H04L45/745 ,  H04L47/12 ,  H04L47/70 ,  H04L49/251 ,  H04L49/253 ,  H04L49/3009 ,  H04L49/3063 ,  H04L49/355 ,  H04L49/9057 ,  H04L69/22

Abstract: A network device receives a packet that includes a plurality of sets of fields. Sets of fields of the packet are parsed and the field sets are evaluated as soon as they are available to determine whether a processing decision can be made on the packet. Additional field sets may be parsed from the packet and obtained in parallel with determining whether a processing decision can be made, but once it is determined that a processing decision can be made, the evaluating of field sets is terminated such that any further field sets of the packet are ignored for purposes of making a processing decision for the packet.

Abstract translation: 网络设备接收包括多组字段的分组。 对数据包的字段进行解析，并且一旦可用，即可对字段集进行评估，以确定是否可以对数据包进行处理决定。 可以从分组中分析附加的字段集，并且与确定是否可以进行处理决定并行获得，但是一旦确定可以进行处理决定，则终止场集合的评估，使得任何另外的字段集合 为了对分组进行处理决定，该分组被忽略。

公开(公告)号：US09001830B2

公开(公告)日：2015-04-07

申请号：US13708200

申请日：2012-12-07

Applicant: Cisco Technology, Inc.

Inventor： Thomas J. Edsall ,  Alessandro Fulli ,  Putu Harry Subagio ,  Mingzhe Li ,  Christopher A. Wildman ,  Yichou Lin ,  Chih-Tsung Huang

IPC: H04L12/28 ,  H04L12/721 ,  H04L12/851 ,  H04L12/813

CPC classification number: H04L45/38 ,  H04L45/566 ,  H04L47/12 ,  H04L47/20 ,  H04L47/2441 ,  H04L47/2483

Abstract: Presented herein are techniques to achieve ultra low latency determination of processing decisions for packets in a network device. A packet is received at a port of a network device. A processing decision is determined in a first processing decision path based on content of the packet and one or more network policies. A processing decision is determined in a second processing decision path, in parallel with the first processing path, by accessing a table storing processing decisions. The second processing decision path can output a processing decision faster than the first processing decision path for packets that match one or more particular packet flow parameters contained in the table. A processing decision determined by the second processing decision path, if one can be made, is used, and otherwise a processing decision determined by the first processing decision path is used.

Abstract translation: 这里提出的技术是实现超低等待时间确定网络设备中的分组的处理决策。 在网络设备的端口处接收分组。 基于分组的内容和一个或多个网络策略在第一处理决策路径中确定处理决定。 通过访问存储处理决定的表，在与第一处理路径并行的第二处理决定路径中确定处理决定。 第二处理决策路径可以比与表中包含的一个或多个特定分组流参数匹配的分组的第一处理决策路径更快地输出处理决策。 如果使用由第二处理决定路径确定的处理决定，则使用由第一处理判定路径确定的处理决定。

公开(公告)号：US08942100B2

公开(公告)日：2015-01-27

申请号：US13708229

申请日：2012-12-07

Applicant: Cisco Technology, Inc.

Inventor： Thomas J. Edsall ,  Ganga Sudharshini Devadas ,  Dennis Khoa Dang Nguyen ,  Chih-Tsung Huang

IPC: H04L12/26 ,  H04L12/801 ,  G06F13/38 ,  H04L12/835

CPC classification number: H04L43/0882 ,  G06F13/385 ,  G06F2213/3808 ,  H04L43/045 ,  H04L43/16 ,  H04L47/12 ,  H04L47/29 ,  H04L47/30 ,  H04L49/90 ,  H04L49/9005

Abstract: Presented herein are techniques for detection and characterization of buffer occupancy of a buffer in a network device. Packets are received at a network device. The packets are stored in a buffer of the network device as they are processed by the network device. An occupancy level of the buffer is sampled at a sampling rate. Occupancy levels of the buffer over time are determined from the sampling, and traffic flow through the network device is characterized based on the occupancy levels.

Abstract translation: 这里提出了用于检测和表征网络设备中的缓冲器的缓冲器占用的技术。 数据包在网络设备上被接收。 当网络设备处理时，数据包被存储在网络设备的缓冲器中。 以采样率对缓冲器的占用电平进行采样。 根据采样确定缓冲区的占用水平，通过网络设备的业务流量基于占用水平进行表征。

公开(公告)号：US20240106737A1

公开(公告)日：2024-03-28

申请号：US18532290

申请日：2023-12-07

Applicant: Cisco Technology, Inc.

Inventor： Chih-Tsung Huang ,  Wei-Jen Huang

IPC: H04L45/28 ,  H04L43/0817 ,  H04L43/16 ,  H04L45/00

CPC classification number: H04L45/28 ,  H04L43/0817 ,  H04L43/16 ,  H04L45/22 ,  H04L45/306

Abstract: The present technology is directed to a system and method for application aware management and recovery of link failures resulting from excessive errors observed on the link. One aspect of the proposed technology is based on identification of link errors associated with application-specific data patterns traversing link. Other aspects involve corrective actions based on relocation or modification of specific application traffic to thereby alleviate the observed excessive link errors and prevent a link failure or shut down. Relocation may involve moving the source application to a different virtual machine/container/physical device or rerouting application traffic by updating relevant routing protocols. Modification may involve harmlessly changing payload data pattern to remove data-pattern dependent signal attenuation. Information corresponding to identified faulty payload data patterns and associated frame data quality parameters maybe stored and utilized to provide analytics evaluation of network wide physical resource issues that maybe affecting application traffic.

公开(公告)号：US11882024B2

公开(公告)日：2024-01-23

申请号：US16011302

申请日：2018-06-18

Applicant: Cisco Technology, Inc.

Inventor： Chih-Tsung Huang ,  Wei-Jen Huang

IPC: H04L45/28 ,  H04L43/0817 ,  H04L43/16 ,  H04L45/00 ,  H04L45/302

CPC classification number: H04L45/28 ,  H04L43/0817 ,  H04L43/16 ,  H04L45/22 ,  H04L45/306

Abstract: The present technology is directed to a system and method for application aware management and recovery of link failures resulting from excessive errors observed on the link. One aspect of the proposed technology is based on identification of link errors associated with application-specific data patterns traversing link. Other aspects involve corrective actions based on relocation or modification of specific application traffic to thereby alleviate the observed excessive link errors and prevent a link failure or shut down. Relocation may involve moving the source application to a different virtual machine/container/physical device or rerouting application traffic by updating relevant routing protocols. Modification may involve harmlessly changing payload data pattern to remove data-pattern dependent signal attenuation. Information corresponding to identified faulty payload data patterns and associated frame data quality parameters maybe stored and utilized to provide analytics evaluation of network wide physical resource issues that maybe affecting application traffic.

公开(公告)号：US11750440B2

公开(公告)日：2023-09-05

申请号：US17815250

申请日：2022-07-27

Applicant: Cisco Technology, Inc.

Inventor： Putu H. Subagio ,  Ravikanth Nasika ,  Saikat Bhattacharya ,  Sundher Narayanaswamy ,  Chih-Tsung Huang

IPC: H04L41/0668 ,  H04L12/18 ,  H04L12/44 ,  H04L43/0876 ,  H04L43/16

CPC classification number: H04L41/0668 ,  H04L12/18 ,  H04L12/44 ,  H04L43/0876 ,  H04L43/16

Abstract: A network device receives multi-destination packets from a first node and forwards at least a first of the multi-destination packets to another network device using a first multi-destination tree with respect to the network device. The network device detects that a link associated with the first multi-destination tree satisfies one or more criteria and, in response to detecting that the link satisfies the one or more criteria, selects a second multi-destination tree with respect to the network device. The network device forwards at least a second of the multi-destination packets to the other network device using the second multi-destination tree.

公开(公告)号：US11463383B2

公开(公告)日：2022-10-04

申请号：US17164289

申请日：2021-02-01

Applicant: Cisco Technology, Inc.

Inventor： Chih-Tsung Huang ,  Wei-Jen Huang ,  Kelvin Chan ,  Chiapeng Wu

IPC: H04L49/552 ,  G06F21/62 ,  H04L9/40 ,  H04L49/201 ,  H04L47/34

Abstract: Presented herein are techniques for redacting mirrored network packets prior to providing the mirrored packets to an intended recipient application, such as a third-party analysis application. More specifically, a multi-destination packet redaction device obtains mirrored network traffic that comprises one or more mirrored network packets. The multi-destination packet redaction device filters the mirrored network traffic to determine an intended recipient application of the one or more mirrored network packets and applies a redaction process to redact one or more portions of at least one of the one or more mirrored network packets. The redaction process is customized based on one or more attributes of the intended recipient application.

公开(公告)号：US10965620B2

公开(公告)日：2021-03-30

申请号：US16433485

申请日：2019-06-06

Applicant: Cisco Technology, Inc.

Inventor： Chih-Tsung Huang ,  Wei-Jen Huang ,  Kelvin Chan ,  Chiapeng Wu

IPC: H04L12/939 ,  G06F21/62 ,  H04L29/06 ,  H04L12/931 ,  H04L12/801

Abstract: Presented herein are techniques for redacting mirrored network packets prior to providing the mirrored packets to an intended recipient application, such as a third-party analysis application. More specifically, a multi-destination packet redaction device obtains mirrored network traffic that comprises one or more mirrored network packets. The multi-destination packet redaction device filters the mirrored network traffic to determine an intended recipient application of the one or more mirrored network packets and applies a redaction process to redact one or more portions of at least one of the one or more mirrored network packets. The redaction process is customized based on one or more attributes of the intended recipient application.

公开(公告)号：US20200162192A1

公开(公告)日：2020-05-21

申请号：US16752299

申请日：2020-01-24

Applicant: Cisco Technology, Inc.

Inventor： Keerthi Manjunathan Swarnamanjunathan ,  Chih-Tsung Huang ,  Kelvin Chan ,  Wei-Jen Huang

IPC: H04L1/00 ,  H04L29/08 ,  H04L12/24

Abstract: Disclosed are systems, methods, and non-transitory computer-readable storage media for monitoring application health via correctable errors. The method includes identifying, by a network device, a network packet associated with an application and detecting an error associated with the network packet. In response to detecting the error, the network device increments a counter associated with the application, determines an application score based at least in part on the counter, and telemeters the application score to a controller. The controller can generate a graphical interface based at least in part on the application score and a timestamp associated with the application score, wherein the graphical interface depicts a trend in correctable errors experienced by the application over a network.