Krishna Sundaresan from Cupertino, CA, age 53

Us Patents

Connection-Based Bandwidth Utilization
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US Patent:

7233571, Jun 19, 2007
Filed:

Dec 18, 2001
Appl. No.:

10/025265
Inventors:

Chandrasekar Krishnamurthy - Sunnyvale CA, US
Krishna Sundaresan - Sunnyvale CA, US
Mahash Chellappa - San Jose CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04J 1/16
US Classification:

370236, 379 8817, 709203
Abstract:

A way to provide connection-based bandwidth utilization is disclosed. A connection is provided between a plurality of clients in the network environment. The connection is between the plurality of clients by a plurality of nodes through a plurality of trunks. The utilization capacity of the plurality of trunks is automatically adjusted using standards-based signaling.

Converting Data Packets In A Communication Network
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US Patent:

7324517, Jan 29, 2008
Filed:

Apr 16, 2003
Appl. No.:

10/417430
Inventors:

Krishna Sundaresan - Sunnyvale CA, US
Barry J. Schween - Morgan Hill CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04L 12/56
US Classification:

370392, 370389
Abstract:

Converting a data packet involves receiving a first data packet. The first data packet has a first header expressed according to a first protocol, where the first header has a first source address and a first destination address. A second header corresponding to the first header is generated. The second header is expressed according to an Internet Protocol, and has a second source address and a second destination address. The second source address corresponds to the first source address, and the second destination address corresponds to the first destination address. The first data packet is converted to a second data packet by replacing the first header with the second header. The second data packet comprising the second header is outputted.

Method To Provide Effective Connection Grooming In Pnni
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US Patent:

7366176, Apr 29, 2008
Filed:

Jun 11, 2002
Appl. No.:

10/171308
Inventors:

Krishna Sundaresan - Sunnyvale CA, US
Mahesh Chellappa - San Jose CA, US
Chandrasekar Krishnamurthy - Sunnyvale CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04L 12/56
H04L 12/26
US Classification:

37039521, 370238, 370400, 370409
Abstract:

A method to provide actual network connection routing cost for use in connection grooming is disclosed for one embodiment. A setup message is transmitted from a source network node, through one or more intermediate nodes, to a destination node. A connect message, in acknowledgement of the setup message, is transmitted from the destination node, through the one or more intermediate nodes, to the source node to establish a network connection. The connect message includes an actual routing cost field. For one embodiment, an actual routing cost field is carried in a generic application transport (GAT) information element (IE) of a PNNI CONNECT message. The actual routing cost field is updated at every node as each link is traversed from the destination node to the source node. The accumulated routing cost in the GAT IE represents the actual routing cost of the SPVC, which the source node uses for connection grooming.

Method And Apparatus For Efficient Spvc Destination Endpoint Address Change
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US Patent:

7383351, Jun 3, 2008
Filed:

Nov 27, 2001
Appl. No.:

09/996486
Inventors:

Krishna Sundaresan - Sunnyvale CA, US
Mahesh Chellappa - San Jose CA, US
Daniel Cauchy - San Jose CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

G06F 15/16
US Classification:

709238
Abstract:

A method for automatically reconfiguring a soft permanent virtual circuit (SPVC) source endpoint in a PNNI ATM network, in response to an address change at a destination endpoint, by encoding the address change information in a SIG field in a PNNI topology state element within a PNNI topology state packet.

Method And System For Diverse Route Computation
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US Patent:

7386232, Jun 10, 2008
Filed:

Dec 14, 2000
Appl. No.:

09/737384
Inventors:

Daniel C. Cauchy - San Jose CA, US
Krishna Sundaresan - Sunnyvale CA, US
Mahesh Chellappa - San Jose CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04B 10/20
US Classification:

398 58, 398 45, 398 57
Abstract:

A first route is associated with a first channel of two or more channels in a first dense wavelength division multiplex (DWDM) link. A second route is associated with a second channel of the two or more channels in the first dense wavelength division multiplex (DWDM) link. A third route is associated with a third channel of two or more channels in a second dense wavelength division multiplex (DWDM) link. The first route, the second route and the third route provide similar connections. The first DWDM link is different from the second DWDM link. The third route is preselected as an alternate diverse route for a connection through the first route.

Scaling Dynamic Clock Distribution For Large Service Provider Networks
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US Patent:

7421611, Sep 2, 2008
Filed:

Sep 6, 2005
Appl. No.:

11/221257
Inventors:

Krishna Sundaresan - Sunnyvale CA, US
Chandrasekar Krishnamurthy - Sunnyvale CA, US
Mahesh Chellappa - San Jose CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

G06F 1/04
US Classification:

713600, 713400, 713500
Abstract:

A system and method are disclosed for dividing a network into clock partitions to limit the overhead created by transmitting clock sources. A clock partition can be implemented through several methods. A first method turns off the clock topology exchange on ports connected to the nodes outside the partition. A second method appends a four-byte partition identifier to network clock distribution protocol (NCDP) messages. A third method uses private network-network interface (PNNI) peer group identification to determine the clock partition group.

Method To Enhance Routing Control In Pnni Networks
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US Patent:

7471680, Dec 30, 2008
Filed:

Jun 24, 2002
Appl. No.:

10/179059
Inventors:

Stephen Morrow - San Jose CA, US
Mahesh Chellappa - San Jose CA, US
Chandrasekar Krishnamurthy - Sunnyvale CA, US
Krishna Sundaresan - Sunnyvale CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

H04L 12/28
US Classification:

370392, 370396
Abstract:

An embodiment of the invention provides a method for specifying preferred routes for SPVCs across multi-peer group PNNI networks and AINI links. A preferred route for a network connection through a network having a plurality of nodes, organized hierarchically into a plurality of peer groups, is determined. The preferred route is associated with a preferred route identifier. The preferred route identifier is carried in the PNNI SETUP message and is used to link a preferred route database in the source node with the entry border nodes of remote peer groups for a single SPVC. The entry border node of each peer group establishes a connection over a static route corresponding to the preferred route identifier. For one embodiment the preferred route identifier is carried in a generic application transport information element of the PNNI signaling SETUP message, providing a scalable preferred routing capability for SPVCs across multi-peer group PNNI networks.

Method And Apparatus For True Priority Based Connection Establishment Within A Pnni Atm Network
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US Patent:

7480239, Jan 20, 2009
Filed:

Nov 27, 2001
Appl. No.:

09/996485
Inventors:

Krishna Sundaresan - Sunnyvale CA, US
Mahesh Chellappa - San Jose CA, US
Daniel Cauchy - San Jose CA, US
Chandrasekar Krishnamurthy - Sunnyvale CA, US
Assignee:

Cisco Technology, Inc. - San Jose CA
International Classification:

G01R 31/08
US Classification:

370230, 37039521
Abstract:

A method is described that involves updating an understanding of an ATM PNNI network after the reception of PTSE information. The PTSE information has SIG information that describes bandwidth which has been allocated to specific priority levels of a bandwidth resource. The bandwidth resource is within the ATM PNNI network. Then, determining a path through the network for a requested connection. The path is determined in light of the updated understanding. The requested connection has a priority level, wherein the path may result in one or more connections being dropped in order to allow bandwidth for the requested connection. Each of the dropped connections has a lower priority level than the priority level of the requested connection.