公开(公告)号：US09240939B2

公开(公告)日：2016-01-19

申请号：US14060569

申请日：2013-10-22

Applicant: Cisco Technology, Inc.

Inventor： Khanh Vinh Nguyen ,  Nir Ben-Dvora ,  Harinadh Nagulapalli

IPC: H04L12/26

CPC classification number: H04L43/12 ,  H04L43/0835

Abstract: One example method is provided for detecting end-to-end packet loss and retransmission occurring in a connection of a network environment. The method can include monitoring packets transmitted from a sender to a receiver and acknowledgement packets from the receiver to the sender using a probe located in a path between the sender and the receiver in the network environment; identifying, by the probe, a first packet as a possibly-retransmitted packet if the first packet has a fall back sequence number; classifying, by the probe, the first packet as a retransmitted packet using one or more conditions based, at least in part, on one or more of the following: characteristic(s) of the possibly-retransmitted packet, characteristic(s) of sequence numbers observed by the probe, and characteristic(s) of acknowledgements observed by the probe.

Abstract translation: 提供了一种用于检测在网络环境的连接中发生的端到端分组丢失和重传的示例性方法。 该方法可以包括使用位于网络环境中的发送器和接收器之间的路径中的探测器监视从发送器发送到接收器的包以及从接收器到发送器的确认包; 如果第一分组具有回退序列号，则通过探测将第一分组识别为可能重传的分组; 至少部分地基于以下的一个或多个来使用一个或多个条件将所述第一分组作为重传分组进行分类：可能重传的分组的特征，序列的特征 由探针观察到的数字，以及由探针观察到的确认的特征。

公开(公告)号：US09577906B2

公开(公告)日：2017-02-21

申请号：US14020539

申请日：2013-09-06

Applicant: Cisco Technology, Inc.

Inventor： Joao Carlos Leite Ferreira ,  Harinadh Nagulapalli ,  Kangwarn Chinthammit ,  Nir Ben-Dvora

IPC: H04L12/26

CPC classification number: H04L43/0876 ,  H04L43/024 ,  H04L43/106

Abstract: Techniques for scalable performance monitoring using dynamic flow sampling are described. According to one approach, a method comprises intercepting, at an intermediary network device, one or more packets traveling between a source device and a destination device; identifying, at the intermediary network device, a traffic flow based on the one or more packets; determining, at the intermediary network device, whether to collect one or more metrics from the traffic flow based on one or more performance factors of the intermediary network device; in response to a determination to collect the one or more metrics from the traffic flow, the intermediary network collecting the one or more metrics from subsequently intercepted packets belonging to the traffic flow; wherein the method is performed by one or more computing devices.

Abstract translation: 描述了使用动态流采样可扩展性能监控的技术。 根据一种方法，一种方法包括在中间网络设备处拦截在源设备和目的地设备之间传播的一个或多个分组; 在所述中间网络设备处识别基于所述一个或多个分组的业务流; 在所述中间网络设备处，基于所述中间网络设备的一个或多个性能因素来确定是否从所述业务流中收集一个或多个度量; 响应于从所述业务流收集所述一个或多个度量的确定，所述中间网络从属于所述业务流的后续拦截的分组收集所述一个或多个度量; 其中所述方法由一个或多个计算设备执行。

公开(公告)号：US20150109942A1

公开(公告)日：2015-04-23

申请号：US14060569

申请日：2013-10-22

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Khanh Vinh Nguyen ,  Nir Ben-Dvora ,  Harinadh Nagulapalli

IPC: H04L12/26

CPC classification number: H04L43/12 ,  H04L43/0835

Abstract: One example method is provided for detecting end-to-end packet loss and retransmission occurring in a connection of a network environment. The method can include monitoring packets transmitted from a sender to a receiver and acknowledgement packets from the receiver to the sender using a probe located in a path between the sender and the receiver in the network environment; identifying, by the probe, a first packet as a possibly-retransmitted packet if the first packet has a fall back sequence number; classifying, by the probe, the first packet as a retransmitted packet using one or more conditions based, at least in part, on one or more of the following: characteristic(s) of the possibly-retransmitted packet, characteristic(s) of sequence numbers observed by the probe, and characteristic(s) of acknowledgements observed by the probe.

Abstract translation: 提供了一种用于检测在网络环境的连接中发生的端到端分组丢失和重传的示例性方法。 该方法可以包括使用位于网络环境中的发送器和接收器之间的路径中的探测器监视从发送器发送到接收器的包以及从接收器到发送器的确认包; 如果第一分组具有回退序列号，则通过探测将第一分组识别为可能重传的分组; 至少部分地基于以下的一个或多个来使用一个或多个条件将所述第一分组作为重传分组进行分类：可能重传的分组的特征，序列的特征 由探针观察到的数字，以及由探针观察到的确认的特征。