Patents by Inventor Surya Prakash Varanasi
Surya Prakash Varanasi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9154394Abstract: A switch creates and dynamically updates a latency map of a network to adjust routing of flows. Further, the network is monitored to detect latency issues and trigger a dynamic adjustment of routing based on the latency map. In this manner, a flow can be routed along a route (i.e., a faster route) that provides less latency than other available routes. The latency map can be generated based on latency probe packets that are issued from and returned to the source switch. By evaluating many such latent probe packets that have traveled along many available routes (e.g., corresponding to various ports of the switch), the switch or associated administrative logic can dynamically adjust the latency map to updated latency information of available routes. Therefore, responsive to a trigger, the source switch can dynamically adjust the routing of a flow based on latency issues discerned from the network.Type: GrantFiled: September 28, 2010Date of Patent: October 6, 2015Assignee: BROCADE COMMUNICATIONS SYSTEMS, INC.Inventors: Kung-Ling Ko, Surya Prakash Varanasi, Satsheel B. Altekar, John Michael Terry, Vankata Pramod Balakavi
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Patent number: 9100349Abstract: An Ethernet/Fiber Channel network interface device which can be configured by a user to operate on an FC SAN, a CEE network or both. In one embodiment the configuration can be done using jumpers or connections to the pins of a chip, thus allowing a manufacturer to only inventory one device for use with either or both networks. In a second embodiment the configuration can be done in software by setting registers and memory values on the device. This embodiment allows the device to be changed between configurations without removing it from the server or blade. The devices according to the preferred embodiments further reduce power consumption by shutting down portions of the chip not needed based on the configuration of the device.Type: GrantFiled: November 16, 2012Date of Patent: August 4, 2015Assignee: Brocade Communications Systems, Inc.Inventors: Venkata Pramod Balakavi, Venky Nagapudi, Sathseel Altekar, Surya Prakash Varanasi, Li Zhao, Yash V. Bansal
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Patent number: 8996720Abstract: Apparatuses and methods to mirror frames received at an input port or provided by an output port to a port not connected to the device performing the mirroring operation. A frame being sent to a diagnostic system has a mirror header added to allow the frame to be routed through any intervening switches in the same fabric. The final switch or the diagnostic system removes the mirror header. If the diagnostic system is attached in a different fabric, encapsulation and inter-fabric routing headers are added as needed to the frame containing the mirror header. This allows the frame to traverse multiple fabrics to reach the diagnostic system. The encapsulation and inter-fabric routing headers are removed as done normally. This allows a diagnostic system to be connected to any switch in the network, either in the same or a different fabric.Type: GrantFiled: March 16, 2010Date of Patent: March 31, 2015Assignee: Brocade Communications Systems, Inc.Inventors: Satsheel Bhasker Altekar, Venkata Pramod Balakavi, Kung-Ling Ko, Surya Prakash Varanasi
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Patent number: 8792366Abstract: A solution for network packet latency measurement includes, at a network device having a memory, storing a first time value indicating when an ingress port of the network device received a packet. The solution also includes storing a second time value indicating when an egress port of the network device received the packet for transmission towards another network device. The solution also includes storing a difference between the first time value and the second time value.Type: GrantFiled: October 29, 2010Date of Patent: July 29, 2014Assignee: Brocade Communications Systems, Inc.Inventors: John Michael Terry, Wing Cheung, Surya Prakash Varanasi
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Publication number: 20130315256Abstract: An Ethernet/Fibre Channel network interface device which can be configured by a user to operate on an FC SAN, a CEE network or both. In one embodiment the configuration can be done using jumpers or connections to the pins of a chip, thus allowing a manufacturer to only inventory one device for use with either or both networks. In a second embodiment the configuration can be done in software by setting registers and memory values on the device. This embodiment allows the device to be changed between configurations without removing it from the server or blade. The devices according to the preferred embodiments further reduce power consumption by shutting down portions of the chip not needed based on the configuration of the device.Type: ApplicationFiled: November 16, 2012Publication date: November 28, 2013Applicant: BROCADE COMMUNICATIONS SYSTEMS, INC.Inventors: Venkata Pramod Balakavi, Venky Nagapudi, Sathseel Altekar, Surya Prakash Varanasi, Li Zhao, Yash V. Bansal
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Patent number: 8427958Abstract: A switch creates and dynamically updates a latency map of a network to adjust routing of flows. Further, the network is monitored to detect latency issues and trigger a dynamic adjustment of routing based on the latency map. In this manner, a flow can be routed along a route (i.e., a faster route) that provides less latency than other available routes. The latency map can be generated based on latency probe packets that are issued from and returned to the source switch. By evaluating many such latent probe packets that have traveled along many available routes (e.g., corresponding to various ports of the switch), the switch or associated administrative logic can dynamically adjust the latency map to updated latency information of available routes. Therefore, responsive to a trigger, the source switch can dynamically adjust the routing of a flow based on latency issues discerned from the network.Type: GrantFiled: April 30, 2010Date of Patent: April 23, 2013Assignee: Brocade Communications Systems, Inc.Inventors: Kung-Ling Ko, Surya Prakash Varanasi, Satsheel B. Altekar, John Michael Terry, Venkata Pramod Balakavi
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Patent number: 8413018Abstract: A programmable device employs an address and data corruption logic for data written to a first memory. A first signature is computed from the data stored in the first memory and stored in a second memory. When data is read from the first memory, the first signature stored in the second memory is read and compared with a second signature computed from the data read from the first memory. If the first and second signatures do not match, an error condition is indicated.Type: GrantFiled: August 17, 2009Date of Patent: April 2, 2013Assignee: Brocade Communications Systems, Inc.Inventors: Kung-Ling Ko, Surya Prakash Varanasi, Subbarao Palacharla
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Patent number: 8340120Abstract: An Ethernet/Fiber Channel network interface device which can be configured by a user to operate on an FC SAN, a CEE network or both. In one embodiment the configuration can be done using jumpers or connections to the pins of a chip, thus allowing a manufacturer to only inventory one device for use with either or both networks. In a second embodiment the configuration can be done in software by setting registers and memory values on the device. This embodiment allows the device to be changed between configurations without removing it from the server or blade. The devices according to the preferred embodiments further reduce power consumption by shutting down portions of the chip not needed based on the configuration of the device.Type: GrantFiled: September 30, 2009Date of Patent: December 25, 2012Assignee: Brocade Communications Systems, Inc.Inventors: Venkata Pramod Balakavi, Venky Nagapudi, Sathseel Altekar, Surya Prakash Varanasi, Li Zhao, Yash V. Bansal
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Publication number: 20120106365Abstract: A solution for network packet latency measurement includes, at a network device having a memory, storing a first time value indicating when an ingress port of the network device received a packet. The solution also includes storing a second time value indicating when an egress port of the network device received the packet for transmission towards another network device. The solution also includes storing a difference between the first time value and the second time value.Type: ApplicationFiled: October 29, 2010Publication date: May 3, 2012Applicant: Brocade Communications Systems, Inc.Inventors: John Michael Terry, Wing Cheung, Surya Prakash Varanasi
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Publication number: 20120096310Abstract: A network system provides network device having a secondary memory that mirrors the content of a primary memory maintaining data structure parameters entries. The integrity of each data structure parameter entry is tested as the entry is output from the primary memory, such as by using a parity test. If an error is detected in the entry, a corresponding entry from the second memory structure is select for use instead of the entry from the primary memory. The corresponding entries in each memory are then flushed, updated, synchronized, or overwritten from the each memory and processing continues using the new entries or other entries from the primary memory. In the rare instance that corresponding entries from both memories exhibit an error, then an error notification is issued.Type: ApplicationFiled: October 18, 2010Publication date: April 19, 2012Applicant: BROCADE COMMUNICATIONS SYSTEMS, INC.Inventors: Surya Prakash Varanasi, Kung-Ling Ko, Satsheel B. Altekar, Venkata Pramod Balakavi
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Publication number: 20120075999Abstract: A switch creates and dynamically updates a latency map of a network to adjust routing of flows. Further, the network is monitored to detect latency issues and trigger a dynamic adjustment of routing based on the latency map. In this manner, a flow can be routed along a route (i.e., a faster route) that provides less latency than other available routes. The latency map can be generated based on latency probe packets that are issued from and returned to the source switch. By evaluating many such latent probe packets that have traveled along many available routes (e.g., corresponding to various ports of the switch), the switch or associated administrative logic can dynamically adjust the latency map to updated latency information of available routes. Therefore, responsive to a trigger, the source switch can dynamically adjust the routing of a flow based on latency issues discerned from the network.Type: ApplicationFiled: September 28, 2010Publication date: March 29, 2012Applicant: BROCADE COMMUNICATIONS SYSTEMS, INC.Inventors: Kung-Ling Ko, Surya Prakash Varanasi, Satsheel B. Altekar, John Michael Terry, Vankata Pramod Balakavi
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Publication number: 20110267952Abstract: A switch creates and dynamically updates a latency map of a network to adjust routing of flows. Further, the network is monitored to detect latency issues and trigger a dynamic adjustment of routing based on the latency map. In this manner, a flow can be routed along a route (i.e., a faster route) that provides less latency than other available routes. The latency map can be generated based on latency probe packets that are issued from and returned to the source switch. By evaluating many such latent probe packets that have traveled along many available routes (e.g., corresponding to various ports of the switch), the switch or associated administrative logic can dynamically adjust the latency map to updated latency information of available routes. Therefore, responsive to a trigger, the source switch can dynamically adjust the routing of a flow based on latency issues discerned from the network.Type: ApplicationFiled: April 30, 2010Publication date: November 3, 2011Applicant: Brocade Communications Systems, Inc.Inventors: Kung-Ling Ko, Surya Prakash Varanasi, Satsheel B. Altekar, John Michael Terry, Venkata Pramod Balakavi
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Publication number: 20110231570Abstract: Apparatuses and methods to mirror frames received at an input port or provided by an output port to a port not connected to the device performing the mirroring operation. A frame being sent to a diagnostic system has a mirror header added to allow the frame to be routed through any intervening switches in the same fabric. The final switch or the diagnostic system removes the mirror header. If the diagnostic system is attached in a different fabric, encapsulation and inter-fabric routing headers are added as needed to the frame containing the mirror header. This allows the frame to traverse multiple fabrics to reach the diagnostic system. The encapsulation and inter-fabric routing headers are removed as done normally. This allows a diagnostic system to be connected to any switch in the network, either in the same or a different fabric.Type: ApplicationFiled: March 16, 2010Publication date: September 22, 2011Applicant: BROCADE COMMUNICATIONS SYSTEMS, INC.Inventors: SATSHEEL BHASKER ALTEKAR, VENKATA PRAMOD BALAKAVI, KUNG-LING KO, SURYA PRAKASH VARANASI
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Publication number: 20110066909Abstract: Pluggable transceiver modules with additional functions and circuitry contained within the module. In a first embodiment, additional circuitry is added to determine bit error rates at the point of the module itself. This allows a much better diagnostic evaluation of location of problem. In an alternate embodiment, various logic is placed in the module. In a first alternate embodiment encryption/decryption units are placed in the converter module so that encryption and decryption operations on the serial bitstream do not need to be performed in a switch. Existing switches can be used but the interconnecting links can still be encrypted. A second alternate embodiment includes compression/decompression units placed in the module to allow effective higher throughput on the selected links.Type: ApplicationFiled: October 30, 2009Publication date: March 17, 2011Applicant: Brocade Communication Systems, Inc.Inventors: David Aaron Skirmont, Daniel Kiernan Kilkenny, Surya Prakash Varanasi, Kung-Ling Ko
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Publication number: 20110058573Abstract: An Ethernet/Fibre Channel network interface device which can be configured by a user to operate on an FC SAN, a CEE network or both. In one embodiment the configuration can be done using jumpers or connections to the pins of a chip, thus allowing a manufacturer to only inventory one device for use with either or both networks. In a second embodiment the configuration can be done in software by setting registers and memory values on the device. This embodiment allows the device to be changed between configurations without removing it from the server or blade. The devices according to the preferred embodiments further reduce power consumption by shutting down portions of the chip not needed based on the configuration of the device.Type: ApplicationFiled: September 30, 2009Publication date: March 10, 2011Applicant: BROCADE COMMUNICATION SYSTEMS, INC.Inventors: VENKATA PRAMOD BALAKAVI, VENKY NAGAPUDI, SATHSEEL ALTEKAR, SURYA PRAKASH VARANASI, LI ZHAO, YASH V. BANSAL
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Publication number: 20110041031Abstract: A programmable device employs an address and data corruption logic for data written to a first memory. A first signature is computed from the data stored in the first memory and stored in a second memory. When data is read from the first memory, the first signature stored in the second memory is read and compared with a second signature computed from the data read from the first memory. If the first and second signatures do not match, an error condition is indicated.Type: ApplicationFiled: August 17, 2009Publication date: February 17, 2011Inventors: Kung-Ling Ko, Surya Prakash Varanasi, Subbarao Palacharla
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Publication number: 20110041030Abstract: A programmable device employs an address and data corruption logic for data written to a memory. A first signature is computed from the data stored in the memory and the address at which it is stored. The signature is stored with the data in the memory. When data is read from the memory, the first signature stored in the memory is also read and compared with a second signature computed from the data read from the memory and the address from which it is read. If the first and second signatures do not match, an error condition is indicated.Type: ApplicationFiled: August 17, 2009Publication date: February 17, 2011Inventors: KUNG-LING KO, Surya Prakash Varanasi
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Patent number: 7460537Abstract: Accordingly, there is disclosed herein an augmented Fibre Channel (FC) frame format which may provide support for multiple fabric FC networks, and may improve the performance of modularly-constructed switches. In one embodiment, the augmented FC frame format is modulated on a carrier signal and the frame includes: a start-of-frame field; a supplementary header field that follows the start-of-frame field; a frame header field that follows the supplementary header field; a cyclic redundancy code (CRC) checksum field; and an end-of-frame field that follows the CRC checksum field. The supplementary header field may include a destination tag that identifies a target fabric to which the frame is directed. Alternatively, or in addition, the supplementary header field may include an egress port identifier that identifies a switch port through which the frame is to exit a switch. The supplementary header may also include flags to request special handling by the receiver.Type: GrantFiled: January 29, 2004Date of Patent: December 2, 2008Assignee: Brocade Communications Systems, Inc.Inventors: Timothy John Millet, Surya Prakash Varanasi, Zahid Hussain, Kung-Ling Ko