Ronak K Desai

US Patent:

7372811, May 13, 2008

Filed:

Aug 7, 2001

Appl. No.:

09/924278

Inventors:

Chang Ahn - San Jose CA, US
Swaminathan Sundararaman - Cupertino CA, US
Ronak Desai - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 3/14
H04L 12/26

US Classification:

370231, 370235, 370252

Abstract:

A system and method for load balancing transmissions across a multilink frame relay connection is disclosed. A credit value is assigned to each bundle link in the multilink based on the amount of data transmitted over a set period of time. Frames or frame fragments are sent over the link with the highest credit value. Credit is subtracted from the link in proportion to the size of the frame or frame fragment. When two or more links have the same credit value, the frame or fragment is sent over the slowest link. The credit values are reset when a specified time period has passed, a link has a negative credit value, or all the links have a credit value of zero.

US Patent:

7415029, Aug 19, 2008

Filed:

Dec 22, 2000

Appl. No.:

09/746467

Inventors:

Kenneth Michael Hyams - Santa Barbara CA, US
Robert James Biskner - Santa Barbara CA, US
Ronak Desai - Fremont CA, US
Satish Salagame - Sunnyvale CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/64
H04M 7/00

US Classification:

370401, 370356, 370467, 379229, 379237

Abstract:

An apparatus including a private branch exchange (PBX) switch, a residential gateway to receive channel associated signals (CAS) from the PBX switch, and a programmable CAS module to convert the CAS signals into internet protocol (IP) signals is disclosed.

US Patent:

7756066, Jul 13, 2010

Filed:

Jan 10, 2006

Appl. No.:

11/329681

Inventors:

Tameen Khan - Santa Clara CA, US
Amitkumar Patel - Fremont CA, US
Ronak Desai - Fremont CA, US
Ramana Mellacheruvu - San Jose CA, US
Umesh Mahajan - Cupertino CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370256, 370250, 455427

Abstract:

Disclosed are methods and apparatus for restarting a first network device having a plurality of ports for receiving and transmitting layer 2 data. The first network device belongs to a network of network devices. When a restart of at least a portion of the first network device is imminent whereby STP is no longer functioning for the first network device during the restart and can no longer alter a spanning tree protocol (STP) state of one or more of the ports and such ports that remain in a fixed state during the restart are referred to as restarting ports, a current state (such as forwarding) of each restarting port is maintained during the restart under predefined conditions. During the restart, each of the restarting ports of the restarting network device portion cooperate with its peer port of a second non-restarting network device that is a neighbor of the first network device so as to prevent layer 2 loops in the network.

US Patent:

7801061, Sep 21, 2010

Filed:

Jan 10, 2006

Appl. No.:

11/329863

Inventors:

Tameen Khan - Santa Clara CA, US
Amitkumar Patel - Fremont CA, US
Ronak Desai - Fremont CA, US
Ramana Mellacheruvu - San Jose CA, US
Umesh Mahajan - Cupertino CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370256, 455427

Abstract:

Disclosed are methods and apparatus for restarting a first network device having a plurality of ports for receiving and transmitting layer 2 data. The first network device belongs to a network of network devices. When a restart of at least a portion of the first network device is imminent whereby the restarting network device portion can no longer alter a spanning tree protocol (STP) state of one or more of the ports and such ports that remain in a fixed state during the restart are referred to as restarting ports, a current state (such as forwarding) of each restarting port is maintained during the restart under predefined conditions. During the restart, each of the restarting ports of the restarting network device portion cooperate with its peer port of a second non-restarting network device that is a neighbor of the first network device so as to prevent layer 2 loops in the network.

US Patent:

7830880, Nov 9, 2010

Filed:

Aug 21, 2007

Appl. No.:

11/842800

Inventors:

Christian Sasso - Milpitas CA, US
Anand Hariharan - San Jose CA, US
Ronak Desai - Fremont CA, US
Siddharth Kasat - Santa Clara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 3/06

US Classification:

370390, 370503, 398154

Abstract:

In one embodiment, detecting an initialization of a synchronization phase of a network device in a fiber channel fabric, performing synchronization phase optimization of the network device to select a predetermined number of interfaces, and transmitting a synchronization request on the predetermined number of interfaces, are provided.

US Patent:

7864712, Jan 4, 2011

Filed:

Jul 20, 2007

Appl. No.:

11/880322

Inventors:

Tameen Khan - Santa Clara CA, US
Ronak Desai - Fremont CA, US
Dino Farinacci - San Jose CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/56

US Classification:

370256, 370401

Abstract:

A method and system for preventing loops in a network including network devices operating different protocols for providing loop-free topology are disclosed. In one embodiment, a method includes receiving link state information at a network device operating a first protocol and in communication with a network device operating a second protocol, creating at least one tunnel to one or more other network devices operating the first protocol and in communication with a network device operating the second protocol, receiving a proposal, blocking designated boundary ports in communication with network devices operating the second protocol, and transmitting an agreement.

US Patent:

7876707, Jan 25, 2011

Filed:

Sep 6, 2007

Appl. No.:

11/851225

Inventors:

Christian Sasso - Milpitas CA, US
Anand Hariharan - San Jose CA, US
Ronak Desai - Fremont CA, US
Siddharth Kasat - Santa Clara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04J 14/00

US Classification:

370254, 370351, 398 45

Abstract:

In one embodiment, a technique for performing partial build fabric operations when merging two or more Fibre Channel fabrics is provided. By maintaining a Principal Switch already assigned for one of two merging fabrics, a limited “partial build” may be performed for the other merging fabric. As a result, the time required for a Principal Switch selection phase may be greatly reduced.

US Patent:

7944860, May 17, 2011

Filed:

Jun 4, 2009

Appl. No.:

12/455612

Inventors:

Santosh Rajagopalan - San Francisco CA, US
Tameen Khan - Los Angeles CA, US
Ronak Desai - Fremont CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04L 12/56

US Classification:

370256, 370392

Abstract:

In one embodiment, a method includes receiving at a processor at a node, notification of an error in a VLAN to topology mapping at the node, receiving a multi-destination packet from the VLAN in the VLAN to topology mapping, the multi-destination packet including a tree identifier associated with one of the topologies, and transmitting the multi-destination packet to all forwarding ports at the node in an unpruned tree corresponding to the tree identifier contained in the multi-destination packet. An apparatus is also disclosed.