Roopesh R Varier

US Patent:

7366101, Apr 29, 2008

Filed:

Jun 30, 2003

Appl. No.:

10/611573

Inventors:

Roopesh R. Varier - Sunnyvale CA, US
David Jacobson - Durham NC, US
Guy Riddle - Los Gatos CA, US

Assignee:

Packeteer, Inc. - Cupertino CA

International Classification:

H04J 3/14
H04J 3/06
H04L 12/26
H04L 12/28
H04L 12/56

US Classification:

370241, 370401, 370503

Abstract:

Methods, apparatuses and systems directed to a network traffic synchronization mechanism facilitating the deployment of network devices in redundant network topologies. In certain embodiments, when a first network device directly receives network traffic, it copies the network traffic and transmits it to at least one partner network device. The partner network device processes the copied network traffic, just as if it had received it directly, but, in one embodiment, discards the traffic before forwarding it on to its destination. In one embodiment, the partner network devices are operative to exchange directly received network traffic. As a result, the present invention provides enhanced reliability and seamless failover. Each unit, for example, is ready at any time to take over for the other unit should a failure occur. As discussed below, the network traffic synchronization mechanism can be applied to a variety of network devices, such as firewalls, gateways, network routers, and bandwidth management devices.

US Patent:

7453804, Nov 18, 2008

Filed:

Feb 8, 2005

Appl. No.:

11/053596

Inventors:

Azeem Feroz - Cupertino CA, US
Wei-Lung Lai - Cupertino CA, US
Roopesh R. Varier - Sunnyvale CA, US
James J. Stabile - Los Altos CA, US
Jon Eric Okholm - Monte Sereno CA, US

Assignee:

Packeteer, Inc. - Cupertino CA

International Classification:

G01R 31/08
H04L 12/28
H04J 3/16

US Classification:

370230, 370229, 370412, 370468

Abstract:

Methods, apparatuses and systems directed to an aggregate bandwidth utilization control scheme including fair share bandwidth allocation and dynamic allocation of bandwidth in response to detected traffic utilization. In one implementation, the present invention includes a weighted, fair share aggregate bandwidth allocation mechanism that dynamically responds to observed bandwidth utilization to provide unutilized or excess bandwidth to flows and partitions that require it. In another implementation, the present invention features a weighted fair share allocation scheme for hierarchical partition configurations. In other implementations, the present invention provides a per-flow target rate assignment mechanism that prevents spiraling decline of data flow rates.

US Patent:

7500014, Mar 3, 2009

Filed:

May 7, 2003

Appl. No.:

10/431010

Inventors:

David Jacobson - Durham NC, US
Roopesh R. Varier - Sunnyvale CA, US
Michael J. Quinn - Campbell CA, US

Assignee:

Packeteer, Inc. - Sunnyvale CA

International Classification:

G06F 15/173

US Classification:

709239, 709240, 709242

Abstract:

Methods, apparatuses and systems allowing for network link state mirroring in intermediate network devices. A variety of intermediate network devices disposed between two network devices are operationally transparent to the two network devices. For example, a bandwidth management device disposed between a gateway router and a LAN hub or switch, is operationally transparent, to both network devices since the bandwidth management device, pacing or otherwise controlling packet flows, does not alter the essential routing or switching functions of the devices. The present invention promotes or enhances this operational transparency by mirroring the link state detected at a first network interface on other network interfaces. This functionality is highly useful in today's network topologies where information regarding failure of a link can be used to re-route traffic, alert a network administrator, and the like.

US Patent:

7599283, Oct 6, 2009

Filed:

Jun 1, 2004

Appl. No.:

10/858340

Inventors:

Roopesh R. Varier - Sunnyvale CA, US
James J. Stabile - Los Altos CA, US
Paul Leslie Archard - Kelowna, CA
Guy Riddle - Los Gatos CA, US
David Jacobson - Durham NC, US

Assignee:

Packeteer, Inc. - Cupertino CA

International Classification:

G01R 31/08
H04L 12/28
H04L 12/26
H04J 3/18
G06F 15/173

US Classification:

370216, 370235, 370254, 370477, 709223

Abstract:

Synchronization of network traffic compression mechanisms deployed in redundant network topologies. In one implementation, the present invention features the synchronization of compression statistics on redundant network devices to facilitate failover and load sharing operations in the management of data flows traversing computer network environments. In one implementation, compression meta data is appended to synchronization packets and transmitted to one or more partner or redundant network devices. The receiving network devices use the compression meta data to synchronize one or more data flow control processes or data structures. Implementations of the present invention also feature process flows that increase the efficiency of synchronizing compression related operations.

US Patent:

7643418, Jan 5, 2010

Filed:

Mar 24, 2006

Appl. No.:

11/388495

Inventors:

Roopesh R. Varier - Sunnyvale CA, US
Michael J. Quinn - Campbell CA, US
Jon Eric Okholm - Monte Sereno CA, US

Assignee:

Packeteer, Inc. - Cupertino CA

International Classification:

H04J 3/14

US Classification:

370232, 370229, 370233, 370234

Abstract:

A method for use in a network device that uses a proportional/integral/derivative (PID)-type algorithm to compute one or more flow control parameters intended to achieve a target rate for a data flow.

US Patent:

7773530, Aug 10, 2010

Filed:

Mar 11, 2008

Appl. No.:

12/046089

Inventors:

Roopesh R. Varier - Sunnyvale CA, US
David Jacobson - Durham NC, US
Guy Riddle - Los Gatos CA, US

Assignee:

Packeteer, Inc. - Cupertino CA

International Classification:

H04J 3/14
H04J 3/06
H04L 12/28
H04L 12/56

US Classification:

370241, 370401, 370503

Abstract:

Methods, apparatuses and systems directed to a network traffic synchronization mechanism facilitating the deployment of network devices in redundant network topologies. In certain embodiments, when a first network device directly receives network traffic, it copies the network traffic and transmits it to at least one partner network device. The partner network device processes the copied network traffic, just as if it had received it directly, but, in one embodiment, discards the traffic before forwarding it on to its destination. In one embodiment, the partner network devices are operative to exchange directly received network traffic. As a result, the present invention provides enhanced reliability and seamless failover. Each unit, for example, is ready at any time to take over for the other unit should a failure occur. As discussed below, the network traffic synchronization mechanism can be applied to a variety of network devices, such as firewalls, gateways, network routers, and bandwidth management devices.

US Patent:

8462820, Jun 11, 2013

Filed:

Aug 10, 2010

Appl. No.:

12/854153

Inventors:

Roopesh R. Varier - Sunnyvale CA, US
David Jacobsen - Durham NC, US
Guy Riddle - Los Gatos CA, US

Assignee:

Blue Coat Systems, Inc. - Sunnyale CA

International Classification:

H04L 12/28
H04L 12/56
H04J 3/14
H04J 3/06

US Classification:

370503, 3702411, 370329, 370401

Abstract:

Methods, apparatuses and systems directed to a network traffic synchronization mechanism facilitating the deployment of network devices in redundant network topologies. In certain embodiments, when a first network device directly receives network traffic, it copies the network traffic and transmits it to at least one partner network device. The partner network device processes the copied network traffic, just as if it had received it directly, but, in one embodiment, discards the traffic before forwarding it on to its destination. In one embodiment, the partner network devices are operative to exchange directly received network traffic. As a result, the present invention provides enhanced reliability and seamless failover. Each unit, for example, is ready at any time to take over for the other unit should a failure occur. As discussed below, the network traffic synchronization mechanism can be applied to a variety of network devices, such as firewalls, gateways, network routers, and bandwidth management devices.

US Patent:

7324553, Jan 29, 2008

Filed:

Sep 30, 2003

Appl. No.:

10/676631

Inventors:

Roopesh R. Varier - Sunnyvale CA, US
Guy Riddle - Los Gatos CA, US
David Jacobson - Durham NC, US

Assignee:

Packeteer, Inc. - Cupertino CA

International Classification:

H04J 3/16
H04L 12/28
G01R 31/08

US Classification:

370468, 370235, 3703952, 370420

Abstract:

Methods, apparatuses and systems allowing for dynamic bandwidth management schemes responsive to the state of a plurality of access links in redundant network topologies. In one embodiment, the present invention provides a bandwidth management device that periodically queries routing systems associated with access links, conceptually grouped into a virtual access link, to monitor that load of the access links and, depending on the detected load, adjust the configuration of the bandwidth management device to avoid overloading one or more of the access links. Embodiments of the present invention increases network efficiency and help network traffic to flow more smoothly with higher throughput. In one embodiment, the dynamic link control functionality is invoked when any given access link reaches a threshold capacity level. Assuming that network traffic will scale in the same ratio as presently observed, the present invention calculates the maximum traffic that can be let through so that no network interface or access link is overloaded.