Jerrold Albert Stiffler

US Patent:

8305931, Nov 6, 2012

Filed:

Aug 20, 2009

Appl. No.:

12/544317

Inventors:

Krishnan Sivaramakrishna Iyer - Cary NC, US
James Mark Shaw - Cary NC, US
Jerrold A. Stiffler - Cary NC, US

Assignee:

OPNET Technologies, Inc. - Bethesda MD

International Classification:

H04L 12/28

US Classification:

370254, 709224

Abstract:

A method and/or system is configured to improve the results of an auto-detection of network devices based on the causes of detection failures in preceding runs of the auto-detection process. As each device that is believed to be in the network is found to be undiscovered, the identification of the device and information regarding the cause(s) of non-discovery are stored. Prior to the next auto-detection run, one or more of the discovery parameters are modified, based on the causes associated with the undiscovered devices. The extent to which the discovery parameters are modified is preferably based on the apparent stability of the network, or upon the detection of changes to the network.

US Patent:

20110085449, Apr 14, 2011

Filed:

Oct 7, 2010

Appl. No.:

12/900348

Inventors:

Vinod JEYACHANDRAN - Rockville MD, US
Pradeep Natarajan - Raleigh NC, US
James Mark Shaw - Cary NC, US
Pradeep Singh - McLean VA, US
Nitin Gupta - Rockville MD, US
Jerrold Stiffler - Cary NC, US

International Classification:

H04L 12/26

US Classification:

370248

Abstract:

A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.

US Patent:

20110085450, Apr 14, 2011

Filed:

Oct 7, 2010

Appl. No.:

12/900357

Inventors:

Vinod JEYACHANDRAN - Rockville MD, US
Pradeep Natarajan - Raleigh NC, US
James Mark Shaw - Cary NC, US
Raghavendra Uppalli - Cary NC, US
Pradeep Singh - McLean VA, US
Nitin Gupta - Rockville MD, US
Jerrold Stiffler - Cary NC, US

International Classification:

H04L 12/26

US Classification:

370248

Abstract:

A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.

US Patent:

20130042020, Feb 14, 2013

Filed:

Aug 7, 2012

Appl. No.:

13/568988

Inventors:

Jerrold STIFFLER - Cary NC, US
Raghavendra UPPALLI - Cary NC, US
James Mark SHAW - Cary NC, US

Assignee:

OPNET Technologies, Inc. - Bethesda MD

International Classification:

G06F 15/173

US Classification:

709238

Abstract:

Embodiments for quick network path discovery are provided. Embodiments may be used by a user (e.g., network administrator) in troubleshooting a performance/communication problem in the network. M an embodiment, path information, including Layer-3 and/or Layer-2 path information, can be requested between any pair of devices in the network and presented to the user. In an embodiment, path information is provided to the user in an iterative (or gradual) manner as soon as resolved. This allows the user quick access to path information, which both reduces troubleshooting time and enhances the user experience. In addition, in an embodiment, the path information may be provided without any live interaction with any device in the network.