Chandrasekharan M Nilakantan

US Patent:

6691147, Feb 10, 2004

Filed:

Dec 7, 1999

Appl. No.:

09/455841

Inventors:

Nagaraj Arunkumar - San Jose CA
Ly Loi - Fremont CA
Chandrasekharan Nilakantan - Cupertino CA

Assignee:

3Com Corporation - Santa Clara CA

International Classification:

G06F 1516

US Classification:

709200, 709232

Abstract:

One embodiment of the invention includes a method of managing network communications in a network device. The network device includes software components and modules. Some of the components control the interaction between modules, while other components perform specific functions for associated modules. A module manager component controls the creation and destruction of modules as well as their interactions. A communications manager component manages network communications in the network device. The network communications is supported by creating a number of modules that are associated with components that implement different parts of a network protocol. As a result of the use of the modules, a component need not know which other component(s) it depends upon, nor need it know which other component(s) depend upon it. This allows components to be used together very easily in many different configurations. The modules also allow the same component to be used by multiple modules.

US Patent:

7440393, Oct 21, 2008

Filed:

Dec 9, 2004

Appl. No.:

11/008441

Inventors:

Chandrasekharan Nilakantan - Cupertino CA, US
Gary M. Jaszewski - Los Gatos CA, US

Assignee:

Scalent Systems, Inc. - Palo Alto CA

International Classification:

H04J 1/16

US Classification:

370216, 370431

Abstract:

The present invention provides a method and system for managing communication in a data network. The method and system involves monitoring the communication channels at the host level. The hosts are updated with the monitoring information following which they take a coordinated decision in cases of failure of a channel. The data network comprises a plurality of hosts, which are connected to each other through a plurality of channels. A monitor host is elected out of the plurality of hosts to periodically broadcast a system state packet to the plurality of hosts. The system state packet contains information about the state of the plurality of channels and the plurality of hosts for a given channel. Each of the plurality of hosts compares the observed state of channels, as observed by it, with the reported state as reported in the system state packet. In case a host identifies a discrepancy between the observed state and the reported state, it broadcasts a host state packet, updating the monitor host about the observed state.

US Patent:

7447728, Nov 4, 2008

Filed:

Feb 2, 2004

Appl. No.:

10/770065

Inventors:

Nagaraj Arunkumar - San Jose CA, US
Ly Loi - Fremont CA, US
Chandrasekharan Nilakantan - Cupertino CA, US

Assignee:

3Com Corporation - Marlborough MA

International Classification:

G06F 15/16

US Classification:

709200, 709238

Abstract:

One embodiment of the invention includes a method of managing network communications in a network device. The network device includes software components and modules. Some of the components control the interaction between modules, while other components perform specific functions for associated modules. A module manager component controls the creation and destruction of modules as well as their interactions. A communications manager component manages network communications in the network device. The network communications is supported by creating a number of modules that are associated with components that implement different parts of a network protocol. As a result of the use of the modules, a component need not know which other component(s) it depends upon, nor need it know which other component(s) depend upon it. This allows components to be used together very easily in many different configurations. The modules also allow the same component to be used by multiple modules.

US Patent:

7483374, Jan 27, 2009

Filed:

Oct 24, 2003

Appl. No.:

10/692667

Inventors:

Chandrasekharan Nilakantan - Cupertino CA, US
Siva V. Kumar - Menlo Park CA, US
Andrew Leslie Laursen - Auburn CA, US
Saroop Mathur - Los Altos CA, US
Gary Michael Jaszewski - Los Gatos CA, US
Mei-Ying Chan - Los Altos CA, US

Assignee:

Scalent Systems, Inc. - Palo Alto CA

International Classification:

G01R 31/00

US Classification:

370235, 370389, 370392, 370400, 370401, 370386, 718105, 709232

Abstract:

Methods and systems for determining paths for flows within a multi-stage network made up of clusters of processing nodes. The flow paths may be determined without knowledge of whether or not packets of a particular flow will actually traverse specific ones of the clusters within the multi-stage network. In various implementations, the nodes of the multi-stage network may be coupled to one or more physical network switches through respective physical interfaces and a virtual connectivity grid superimposed thereon and configured through the use of a flow routing framework and system management framework to group the nodes into a number of clusters. The nodes of each cluster are configured to perform similar packet processing functions and the clusters are interconnected through virtual networks to which the nodes are communicatively coupled via virtual interfaces overlaid on top of the physical network interfaces.

US Patent:

7724670, May 25, 2010

Filed:

Dec 19, 2008

Appl. No.:

12/340386

Inventors:

Chandrasekharan Nilakantan - Cupertino CA, US
Siva V. Kumar - Menlo Park CA, US
Andrew Leslie Laursen - Auburn CA, US
Saroop Mathur - Los Altos CA, US
Gary Michael Jaszewski - Los Gatos CA, US
Mei-Ying Chan - Los Altos CA, US

Assignee:

Scalent Systems, Inc. - Palo Alto CA

International Classification:

G01R 31/08

US Classification:

370235, 370389, 370401

Abstract:

Methods and systems for determining paths for flows within a multi-stage network made up of clusters of processing nodes. The flow paths may be determined without knowledge of whether or not packets of a particular flow will actually traverse specific ones of the clusters within the multi-stage network. In various implementations, the nodes of the multi-stage network may be coupled to one or more physical network switches through respective physical interfaces and a virtual connectivity grid superimposed thereon and configured through the use of a flow routing framework and system management framework to group the nodes into a number of clusters. The nodes of each cluster are configured to perform similar packet processing functions and the clusters are interconnected through virtual networks to which the nodes are communicatively coupled via virtual interfaces overlaid on top of the physical network interfaces.

US Patent:

7899077, Mar 1, 2011

Filed:

Oct 27, 2008

Appl. No.:

12/258573

Inventors:

Nagaraj Arunkumar - San Jose CA, US
Ly Loi - Fremont CA, US
Chandrasekharan Nilakantan - Cupertino CA, US

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H04J 3/16

US Classification:

370465, 709227

Abstract:

One embodiment of the invention includes a method of managing network communications in a network device. The network device includes software components and modules. Some of the components control the interaction between modules, while other components perform specific functions for associated modules. A module manager component controls the creation and destruction of modules as well as their interactions. A communications manager component manages network communications in the network device. The network communications is supported by creating a number of modules that are associated with components that implement different parts of a network protocol. As a result of the use of the modules, a component need not know which other component(s) it depends upon, nor need it know which other component(s) depend upon it. This allows components to be used together very easily in many different configurations. The modules also allow the same component to be used by multiple modules.

US Patent:

8612738, Dec 17, 2013

Filed:

Apr 28, 2011

Appl. No.:

13/096061

Inventors:

Chandrasekharan Nilakantan - Cupertino CA, US
Lawrence Stein - San Carlos CA, US

Assignee:

Dell Products L.P. - Round Rock TX

International Classification:

H04L 12/28

US Classification:

713 2, 370389, 709228

Abstract:

A method of configuring a data network with a controller, the data network including a plurality of hosts each associated with at least one of a plurality of switches, the method including receiving a request to boot an operating system image on one of the plurality of hosts, the operating system image having network connectivity requirements. Further, the method includes selecting a host out of the plurality of hosts on which to boot the operating system image. The method also includes booting the operating system image on the host, and configuring a switch out of the plurality of switches associated with the host based upon the network connectively requirements of the operating system image. Additionally, the method includes configuring networking attributes of a network interface in the host based upon the network connectivity requirements of the operating system image.

US Patent:

20110128887, Jun 2, 2011

Filed:

Feb 9, 2011

Appl. No.:

13/024207

Inventors:

Nagaraj Arunkumar - San Jose CA, US
Ly Loi - Fremont CA, US
Chandrasekharan Nilakantan - Cupertino CA, US

International Classification:

H04L 12/28

US Classification:

370254

Abstract:

One embodiment of the invention includes a method of managing network communications in a network device. The network device includes software components and modules. Some of the components control the interaction between modules, while other components perform specific functions for associated modules. A module manager component controls the creation and destruction of modules as well as their interactions. A communications manager component manages network communications in the network device. The network communications is supported by creating a number of modules that are associated with components that implement different parts of a network protocol. As a result of the use of the modules, a component need not know which other component(s) it depends upon, nor need it know which other component(s) depend upon it. This allows components to be used together very easily in many different configurations. The modules also allow the same component to be used by multiple modules.