Prashanth P Krishnamurthy

US Patent:

20120099447, Apr 26, 2012

Filed:

Oct 22, 2010

Appl. No.:

12/910690

Inventors:

Sajit Bhaskaran - Sunnyvale CA, US
Anmol Kumar - Santa Clara CA, US
Prashanth Krishnamurthy - Santa Clara CA, US

International Classification:

H04L 12/26

US Classification:

370252

Abstract:

A Multi-Homing System is equipped with an Adaptive ISP Access Cloud State Detection apparatus (ACSD) that improves the reliability of the availability of digital connections (links) between computer sites, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved over prior art methods by using data elements of Internet Protocol data-grams, e.g. record fields or bits of fields, that are regularly and normally exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status. when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can reliably determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.

US Patent:

20140050109, Feb 20, 2014

Filed:

Oct 24, 2013

Appl. No.:

14/062778

Inventors:

Anmol Kumar - Santa Clara CA, US
Prashanth Krishnamurthy - Santa Clara CA, US

Assignee:

Aspen Networks, Inc. - Santa Clara CA

International Classification:

H04L 12/26

US Classification:

370252

Abstract:

A Multi-Homing System is equipped with an Adaptive JSP Access Cloud State Detection apparatus (ACSD) that improves the reliability of the availability of digital connections (links) between computer sites, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved over prior art methods by using data elements of Internet Protocol datagrams, e.g. record fields or bits of fields, that are regularly and normally exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status. when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can reliably determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.

US Patent:

7620037, Nov 17, 2009

Filed:

Dec 14, 2004

Appl. No.:

11/012554

Inventors:

Sajit Bhaskaran - Sunnyvale CA, US
Anmol Kumar - Santa Clara CA, US
Prashanth Krishnamurthy - Santa Clara CA, US

Assignee:

Aspen Networks, Inc. - Santa Clara CA

International Classification:

H04L 12/28
H04L 12/66
G06F 15/167
G06F 15/177

US Classification:

370356, 370389, 370392, 709212, 709223

Abstract:

A Multi-Homing System is equipped with an Adaptive ISP Access Cloud State Detection apparatus (ACSD) that improves the reliability of the availability of digital connections (links) between computer sites, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved over prior art methods by using data elements of Internet Protocol datagrams, e. g. record fields or bits of fields, that are regularly and normally exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status. when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can reliably determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.

US Patent:

20200287830, Sep 10, 2020

Filed:

Mar 6, 2019

Appl. No.:

16/294851

Inventors:

- Santa Clara CA, US
Prashanth Krishnamurthy - San Jose CA, US
Tula Kraiser - Sunnyvale CA, US

International Classification:

H04L 12/743
H04L 29/12
H04L 29/08
G06F 8/71

Abstract:

Techniques for implementing resilient hashing with multiple hashes are provided. In one set of embodiments, a network device can maintain a first hash table comprising mappings between a first set of hash indices and a set of bit values. The network device can also maintain a second hash table comprising mappings between a second set of hash indices and active next-hop destinations. Upon receiving a network packet, the network device can compute a first hash and can match the first hash value to a first mapping in the first hash table based on the first mapping's hash index. When the first mapping's bit value indicates that the first mapping's hash index corresponds to an active next-hop destination, the network device can further match the first hash value to a second mapping in the second hash table and send the network packet to the second mapping's active next-hop destination.

US Patent:

20200287964, Sep 10, 2020

Filed:

Mar 6, 2019

Appl. No.:

16/294829

Inventors:

- Santa Clara CA, US
Tula Kraiser - Sunnyvale CA, US
Prashanth Krishnamurthy - San Jose CA, US
Peter Lam - Anmore, CA

International Classification:

H04L 29/08

Abstract:

Techniques for implementing history-based connection-server affinity on a network load balancer are provided. In one set of embodiments, the network load balancer can receive a network packet destined for a service, where the service is associated with a plurality of servers, and where the packet is part of a network connection between a client device and one of the plurality of servers. The network load balancer can further compute, using a portion of the packet, a bucket identifier of a bucket for the network connection, identify a first server in the plurality of servers that is currently mapped to the bucket identifier in a hash table, and send the packet to the first server. If the network load balancer receives the packet back from the first server, the network load balancer can determine, based on local history information, a second server that was previously mapped to the bucket identifier in the hash table and send the packet to that second server.

US Patent:

20190158349, May 23, 2019

Filed:

Jan 23, 2019

Appl. No.:

16/255631

Inventors:

- Santa Clara CA, US
Anmol Kumar - Santa Clara CA, US
Prashanth Krishnamurthy - Santa Clara CA, US

International Classification:

H04L 12/24
H04L 12/26

Abstract:

A Multi-Homing System is equipped with an Adaptive JSP Access Cloud State Detection apparatus (ACSD) that improves the reliability of digital connections, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved by using data elements of Internet Protocol datagrams that are exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status, when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.

US Patent:

20180309620, Oct 25, 2018

Filed:

Jun 28, 2018

Appl. No.:

16/022260

Inventors:

- Santa Clara CA, US
Anmol KUMAR - Santa Clara CA, US
Prashanth KRISHNAMURTHY - Santa Clara CA, US

International Classification:

H04L 12/24
H04L 12/26

Abstract:

A Multi-Homing System is equipped with an Adaptive JSP Access Cloud State Detection apparatus (ACSD) that improves the reliability of digital connections, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved by using data elements of Internet Protocol datagrams that are exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status. when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.

US Patent:

20170070383, Mar 9, 2017

Filed:

Nov 18, 2016

Appl. No.:

15/356309

Inventors:

- Santa Clara CA, US
Anmol KUMAR - Santa Clara CA, US
Prashanth KRISHNAMURTHY - Santa Clara CA, US

International Classification:

H04L 12/24
H04L 12/26

Abstract:

A Multi-Homing System is equipped with an Adaptive JSP Access Cloud State Detection apparatus (ACSD) that improves the reliability of the availability of digital connections (links) between computer sites, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved over prior art methods by using data elements of Internet Protocol datagrams, e.g. record fields or bits of fields, that are regularly and normally exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status. when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can reliably determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.

Author:

Prashanth Krishnamurthy

ISBN #:

3540009361