Kalyan Kumar Ghosh

US Patent:

7460527, Dec 2, 2008

Filed:

Aug 20, 2004

Appl. No.:

10/923223

Inventors:

Kalyan Ghosh - Santa Clara CA, US
Praveen Jain - San Jose CA, US
Shankar Subramanian - San Jose CA, US
Rajesh Bhandari - San Jose CA, US
Prabesh Babu Nanjundaiah - Cupertino CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/50
H04L 12/56
H04L 12/42

US Classification:

370360, 370352, 370386, 3703953, 370449, 709249, 398 45

Abstract:

According to the present invention, methods and apparatus are provided to allow efficient and effective aggregation of ports into port channels in a fiber channel network. A local fiber channel switch can automatically identify compatible ports and initiate exchange sequences with a remote fiber channel switch to aggregate ports into port channels. Ports can be aggregated synchronously to allow consistent generation of port channel map tables.

US Patent:

7484021, Jan 27, 2009

Filed:

Jan 12, 2006

Appl. No.:

11/332747

Inventors:

Gaurav Rastogi - Mountain View CA, US
Ramsundar Janakiraman - Sunnyvale CA, US
Kalyan Ghosh - Santa Clara CA, US
Badri Ramaswamy - Saratoga CA, US
Joy J Chatterjee - Kundalahalli, IN

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G06F 13/12

US Classification:

710 74, 709223, 709225

Abstract:

A technique is provided for facilitating fabric membership login for an N_Port of a storage area network. A communication from a network node is received. The communication may include a portion of criteria associated with the N_Port. Using at least a portion of the portion of criteria, a virtual fabric identifier corresponding to a virtual fabric which is associated with the N_Port may be automatically identified. Fabric configuration information, which includes the virtual fabric identifier, may be automatically provided to the network node. A fabric login request from the N_Port to login to the virtual fabric may then be received. According to a specific embodiment, the communication may be transmitted from a network node to an F_Port on a Fiber Channel switch. When the N_Port received the fabric configuration information from the F_Port, the generating, using at least a portion of the received fabric configuration information, a fabric login request message may be generated by the N_Port which includes a fabric login request for the N_Port to login to the virtual fabric corresponding to the virtual fabric identifier. In at least one implementation, the N_Port and/or F_Port may be configured or designed to support trunking functionality.

US Patent:

7899048, Mar 1, 2011

Filed:

Jan 15, 2003

Appl. No.:

10/346050

Inventors:

David S. Walker - San Jose CA, US
Kalyan K. Ghosh - Santa Clara CA, US
Thomas J. Edsall - Cupertino CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370390, 709224

Abstract:

A method is disclosed for remotely monitoring network traffic through a generic network. A first data packet, which indicates a first destination network element, is received. A second data packet, which contains at least a part of the first data packet, is generated. The second data packet indicates a second destination network element that is configured to monitor network traffic. The second destination network element differs from the first destination network element.

US Patent:

7916628, Mar 29, 2011

Filed:

Nov 1, 2004

Appl. No.:

10/979886

Inventors:

Kalyan K. Ghosh - Santa Clara CA, US
Praveen Jain - San Jose CA, US
Shashank Gupta - San Jose CA, US
Tushar Desai - Foster City CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

G01R 31/08

US Classification:

370218, 370235, 370252, 709250

Abstract:

N_Ports and F_Ports are provided with logic allowing designation of multiple virtual interfaces on a single host bus adaptor or other Fiber Channel interface, one virtual interface for each VSAN operating on the node interface. Node ports with this additional functionality are referred to as trunking N_Ports or TN_Ports. These ports have a functional design allowing creation of the multiple virtual interfaces as appropriate for the application at hand. This port design also includes logic for communicating with a peer fabric port to initialize and modify the configuration of the virtual interfaces on the TN_Port. A corresponding functional design and communication logic is provided for fabric ports, referred to herein as trunking F_Ports or TF_Ports.

US Patent:

7940658, May 10, 2011

Filed:

Sep 4, 2008

Appl. No.:

12/231635

Inventors:

Marco Foschiano - Pinerolo, IT
Munish Mehta - Fremont CA, US
Kalyan Kumar Ghosh - Santa Clara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04J 3/14
H04L 12/26
G06F 15/173

US Classification:

370230, 370235, 370252, 370253, 709224

Abstract:

A method and network device to generate a remote traffic monitoring session using an automated technique to configure the source and destination devices of the monitoring system is disclosed. The method includes discovering a Layer 3 (L3) source device and an L3 destination device and automatically configuring the devices. The L3 source device passes target traffic that will be monitored via the L3 destination device in a remote traffic monitoring session. The method verifies configurations of the L3 source device and the L3 destination device, and determines remote monitoring capabilities common to the L3 source device and the L3 destination device. The method negotiates relevant parameters for the remote traffic monitoring session and establishes the remote traffic monitoring session between the L3 source device and the L3 destination device.

US Patent:

7948920, May 24, 2011

Filed:

Mar 3, 2009

Appl. No.:

12/396760

Inventors:

Kalyan Ghosh - Santa Clara CA, US
Srinivas Pitta - Cupertino CA, US
Giuseppe Andreello - Palo Alto CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28
H04L 12/66

US Classification:

370254, 370463

Abstract:

Trunking with port aggregation for fabric ports in a Fiber Channel (FC) fabric and attached devices is described. In some examples, a method of establishing a connection between a node and the FC fabric includes: negotiating a first link between a first trunking node port in the node with a first trunking fabric port in the FC fabric; creating a trunking port channel with the first link as a first member, the trunking port channel supporting a plurality of virtual fabrics; logging in a logical interface for each of the plurality of virtual fabrics to the FC fabric over the trunking port channel; negotiating a second link between a second trunking node port in the node and a second trunking fabric port in the FC fabric; and adding the second link to the trunking port channel as a second member aggregated with the first member.

US Patent:

8401026, Mar 19, 2013

Filed:

May 18, 2009

Appl. No.:

12/467675

Inventors:

Pirabhu Raman - San Jose CA, US
Sanjay Sane - Fremont CA, US
Kalyan Ghosh - Santa Clara CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370396

Abstract:

Two or more network devices can automatically coordinate to aggregate ports into virtual port channels. Ports of the port channel can be automatically assigned priorities to achieve about an equal distribution of active links across the two or more network devices.

US Patent:

8514743, Aug 20, 2013

Filed:

Jun 17, 2010

Appl. No.:

12/802951

Inventors:

Pirabhu Raman - San Jose CA, US
Sanjay Sane - Fremont CA, US
Kalyan Ghosh - Santa Clara CA, US
Yuan-Chi Ma - San Jose CA, US
Man-Yee Hau - Los Gatos CA, US

Assignee:

Cisco Technology, Inc. - San Jose CA

International Classification:

H04L 12/28

US Classification:

370254

Abstract:

In one embodiment, a method includes configuring a first network device for operation in a first logical group with a second network device, receiving information from other network devices configured for operation in a second logical group, the information uniquely identifying each of the other network devices within the second logical group, and assigning a priority to each link connecting the first network device to the second logical group network devices. A portion of the links are selected as active links based on the link priorities and the link priorities are assigned such that a balance of active links is maintained across the second logical group network devices. An apparatus for maintaining a balance of active links across the network devices is also disclosed.