Patents by Inventor Rajkumar Jalan

Rajkumar Jalan 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).

  • Patent number: 8593987
    Abstract: Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: November 26, 2013
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Andrew Tai-Chin Kuo, Ivy Pei-Shan Hsu, Jordi Moncada-Elias, Rajkumar Jalan, Gurudeep Kamat
  • Patent number: 8572228
    Abstract: Each service in a computer network may have a connection rate limit. The number of new connections per time period may be limited by using a series of rules. In a specific embodiment of the present invention, a counter is increased each time a server is selected to handle a connection request. For each service, connections coming in are tracked. Therefore, the source of connection-request packets need not be examined. Only the destination service is important. This saves significant time in the examination of the incoming requests. Each service may have its own set of rules to best handle the new traffic for its particular situation. For server load balancing, a reset may be sent to the source address of the new connection request. For transparent cache switching, the connection request may be forwarded to the Internet.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: October 29, 2013
    Assignee: Foundry Networks, LLC
    Inventors: Ronald W. Szeto, David Chun Ying Cheung, Rajkumar Jalan
  • Patent number: 8554929
    Abstract: Each service in a computer network may have a connection rate limit. The number of new connections per time period may be limited by using a series of rules. In a specific embodiment of the present invention, a counter is increased each time a server is selected to handle a connection request. For each service, connections coming in are tracked. Therefore, the source of connection-request packets need not be examined. Only the destination service is important. This saves significant time in the examination of the incoming requests. Each service may have its own set of rules to best handle the new traffic for its particular situation. For server load balancing, a reset may be sent to the source address of the new connection request. For transparent cache switching, the connection request may be forwarded to the Internet.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: October 8, 2013
    Assignee: Foundry Networks, LLC
    Inventors: Ronald W. Szeto, David Chun Ying Cheung, Rajkumar Jalan
  • Publication number: 20130166762
    Abstract: In activating a service, a service gateway retrieves a service table entry using a service or server address of the service entry, where the service table entry has an association with another service entry. An association to the service entry is added and a marker value is set to indicate associations with two service entries. After a time duration, the association with the other service entry is removed, and the marker value is changed accordingly. In deactivating a service entry, the service gateway calculates a hash value for the service or server address of the service entry. After matching the hash value to a hash value of another service entry, an association with the other service entry is added. A marker value is set to indicate associations with two service entries. After a time duration, the association with the service entry is removed, and the marker value is changed accordingly.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Applicant: A10 NETWORKS, INC.
    Inventors: Rajkumar JALAN, Feilong XU, Rishi SAMPAT
  • Patent number: 8462668
    Abstract: The system, method, and article of manufacture of the present invention allows multiple customers connected to a common external network to each implement a layer 2 redundancy protocol, such as the spanning tree protocol, in order to prevent layer 2 loops. Accordingly, a method is presented for providing an independent loop free layer 2 topology between a external network and a customer network comprising tagging control packets originating on the customer network with a unique identifier and tunneling the control packets received from the customer network between a plurality of boundary interface devices at the external network such that the control packets are routed back to the customer network based on the presence of the unique identifier in the control packet. The layer 2 redundancy protocol on the customer network converges based at least in part on the presence of control packets appearing on more than one port on the customer network.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: June 11, 2013
    Assignee: Foundry Networks, LLC
    Inventors: Andrew Tai-Chin Kuo, Gurudeep Kamat, Jordi Moncada-Elias, Ivy Pei-Shan Hsu, Rajkumar Jalan
  • Publication number: 20130100958
    Abstract: The processing of data packets sent over a communication session between a host and a server by a service gateway, includes: processing a data packet using a current hybrid-stateful or hybrid-stateless, processing method; checking whether a hybrid-stateless, or hybrid-stateful, condition is satisfied; when the condition is satisfied, changing from a hybrid-stateful to a hybrid-stateless processing method, or vice versa, for a subsequently received data packet; and otherwise, continue processing the subsequently received data packet using the current hybrid processing method.
    Type: Application
    Filed: October 24, 2011
    Publication date: April 25, 2013
    Applicant: A10 Networks, Inc.
    Inventors: Rajkumar JALAN, Feilong Xu, Lalgudi Narayanan Kannan, Ronald Wai Lun Szeto
  • Publication number: 20120311116
    Abstract: Synchronization of configuration files of a virtual application distribution chassis, includes: processing a configuration command received by a master blade; updating a first configuration file with the configuration command and an updated tag by the master blade; sending a configuration message by the master blade to the slave blades informing of the updated configuration file, the configuration message comprising the updated tag; in response to receiving the configuration message by a given slave blade of the one or more slave blades, comparing the updated tag in the configuration message with a tag in a second configuration file stored at the given slave blade; and in response to determining that the updated tag in the configuration message is more recent than the tag in the second configuration file stored at the given slave blade, sending a request for the updated configuration file to the master blade by the given slave blade.
    Type: Application
    Filed: June 6, 2011
    Publication date: December 6, 2012
    Applicant: A10 Networks, Inc.
    Inventors: Rajkumar JALAN, Dennis OSHIBA
  • Publication number: 20120297240
    Abstract: A method for electing a master blade in a virtual application distribution chassis (VADC), includes: sending by each blade a VADC message to each of the other blades; determining by each blade that the VADC message was not received from the master blade within a predetermined period of time; in response, sending a master claim message including a blade priority by each blade to the other blades; determining by each blade whether any of the blade priorities obtained from the received master claim messages is higher than the blade priority of the receiving blade; in response to determining that none of the blade priorities obtained is higher, setting a status of a given receiving blade to a new master blade; and sending by the given receiving blade a second VADC message to the other blades indicating the status of the new master blade of the given receiving blade.
    Type: Application
    Filed: July 26, 2012
    Publication date: November 22, 2012
    Applicant: A10 NETWORKS, INC.
    Inventors: Rajkumar Jalan, Dennis Oshiba
  • Patent number: 8266235
    Abstract: A method for electing a master blade in a virtual application distribution chassis (VADC), includes: sending by each blade a VADC message to each of the other blades; determining by each blade that the VADC message was not received from the master blade within a predetermined period of time; in response, sending a master claim message including a blade priority by each blade to the other blades; determining by each blade whether any of the blade priorities obtained from the received master claim messages is higher than the blade priority of the receiving blade; in response to determining that none of the blade priorities obtained is higher, setting a status of a given receiving blade to a new master blade; and sending by the given receiving blade a second VADC message to the other blades indicating the status of the new master blade of the given receiving blade.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: September 11, 2012
    Assignee: A10 Networks, Inc.
    Inventors: Rajkumar Jalan, Dennis Oshiba
  • Publication number: 20120179770
    Abstract: A method for electing a master blade in a virtual application distribution chassis (VADC), includes: sending by each blade a VADC message to each of the other blades; determining by each blade that the VADC message was not received from the master blade within a predetermined period of time; in response, sending a master claim message including a blade priority by each blade to the other blades; determining by each blade whether any of the blade priorities obtained from the received master claim messages is higher than the blade priority of the receiving blade; in response to determining that none of the blade priorities obtained is higher, setting a status of a given receiving blade to a new master blade; and sending by the given receiving blade a second VADC message to the other blades indicating the status of the new master blade of the given receiving blade.
    Type: Application
    Filed: January 31, 2012
    Publication date: July 12, 2012
    Applicant: A10 NETWORKS, INC.
    Inventors: Rajkumar Jalan, Dennis Oshiba
  • Publication number: 20120147747
    Abstract: Solutions are provided that allow a network device to apply flow control on the MAC layer while taking into account the priority of the frame of traffic. This may be accomplished by generating a frame indicating that traffic flow should be paused, while utilizing a new opcode value, or alternatively by utilizing a new type/length value (possibly combined with a new opcode value). A receiving device may then examine the fields of the frame to determine whether it should use priority-based pausing, and then examine other fields to determine which priority-levels to pause and for how long. This allows for improved efficiency in flow control on the MAC layer.
    Type: Application
    Filed: June 15, 2011
    Publication date: June 14, 2012
    Applicants: Brocade Communications Systems, Inc.
    Inventors: Nitin Jain, Rajkumar Jalan
  • Publication number: 20120144015
    Abstract: A service gateway processes a service request received from a host by: relaying the service request from the service gateway to a server over a service session between the service gateway and the server; determining a service request time for the service session; receiving by the service gateway a service response from the server; determining by the service gateway a service response time; calculating by the service gateway a service processing time for the service request from the service request time and the service response time; comparing the service processing time with an expected service processing time; and updating a server busy indicator for the server in response to the comparing. If the service processing time exceeds the expected service processing time, the server busy indicator is updated to indicate that the server is busy. Otherwise, the server busy indicator is updated to indicate that the server is not busy.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 7, 2012
    Applicant: A10 NETWORKS, INC.
    Inventors: Rajkumar Jalan, Ronald Wai Lun Szeto, Feilong Xu
  • Publication number: 20120131671
    Abstract: To secure an access provider, communications to/from the access provider are monitored for a partially-completed connection transaction. Detected partially-completed connection transactions are terminated when they remain in existence for a period of time that exceeds a threshold period of time. The monitoring may include detecting partially-completed connection transactions initiated by an access requestor, measuring the period of time that a partially-completed connection transaction remains in existence, comparing the period of time with the threshold period of time, and resetting a communication port located on the access provider.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 24, 2012
    Applicants: AOL INC., FOUNDRY NETWORKS, INC.
    Inventors: Christopher J. Wright, Patrick Hufford, Terry Rolon, Jonathan K. Robertson, Thomas Stehnach, Rajkumar Jalan
  • Publication number: 20120120952
    Abstract: Multicast capability in a virtual private LAN service (VPLS) is provided in a provider IP/MPLS infrastructure without headend replications by encapsulating a customer data packet to use an established multicast protocol, such as IP multicast. In one example, the customer data packet is encapsulated by an IP header having an IP multicast group address and an Ethernet header. In one implementation, a DNS type mechanism is provided to distribute the IP multicast addresses for VPLS use. Such IP multicast group address can be set aside from an administratively scoped address range. An efficient IP routing algorithm running on the provider's network provides an efficient distribution tree for routing IP-encapsulated customer packet for the VPLS.
    Type: Application
    Filed: October 21, 2011
    Publication date: May 17, 2012
    Applicant: Foundry Networks, LLC
    Inventors: Rajkumar Jalan, Louis Yun, Ivy Pei-Shan Hsu
  • Publication number: 20120084419
    Abstract: A method, system, and computer program product for balancing servers based on server load status, include: receiving from a server a service response to a service request, the service response including a result from a processing of the service request and a server status indicating a computing load status of the server; obtaining the server status from the service response; receiving a next service request from a host, the next service request comprising a Uniform Resource Locator (URL); determining that the server is configured to process the URL; determining whether the server status indicates that the server is available to process the next service request; and in response to determining that the server status indicates that the server is available to process the next service request, sending the next service request to the server.
    Type: Application
    Filed: September 30, 2010
    Publication date: April 5, 2012
    Applicant: A10 Networks, Inc.
    Inventors: Lalgudi Narayanan KANNAN, Ronald Wai Lun Szeto, Lee Chen, Feilong Xu, Rajkumar Jalan
  • Patent number: 8108531
    Abstract: To secure an access provider, communications to/from the access provider are monitored for a partially-completed connection transaction. Detected partially-completed connection transactions are terminated when they remain in existence for a period of time that exceeds a threshold period of time. The monitoring may include detecting partially-completed connection transactions initiated by an access requestor, measuring the period of time that a partially-completed connection transaction remains in existence, comparing the period of time with the threshold period of time, and resetting a communication port located on the access provider.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: January 31, 2012
    Assignees: Foundry Networks, Inc., AOL Inc.
    Inventors: Christopher J. Wright, Patrick Hufford, Terry Rolon, Jonathan K. Robertson, Thomas Stehnach, Rajkumar Jalan
  • Publication number: 20120008635
    Abstract: Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
    Type: Application
    Filed: July 19, 2011
    Publication date: January 12, 2012
    Applicant: Brocade Communications Systems, Inc.
    Inventors: Andrew Tai-Chin Kuo, Ivy Pei-Shan Hsu, Jordi Moncada-Elias, Rajkumar Jalan, Gurudeep Kamat
  • Patent number: 8051201
    Abstract: Multicast capability in a virtual private LAN service (VPLS) is provided in a provider IP/MPLS infrastructure without headend replications by encapsulating a customer data packet to use an established multicast protocol, such as IP multicast. In one example, the customer data packet is encapsulated by an IP header having an IP multicast group address and an Ethernet header. In one implementation, a DNS type mechanism is provided to distribute the IP multicast addresses for VPLS use. Such IP multicast group address can be set aside from an administratively scoped address range. An efficient IP routing algorithm running on the provider's network provides an efficient distribution tree for routing IP-encapsulated customer packet for the VPLS.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: November 1, 2011
    Assignee: Foundry Networks, LLC
    Inventors: Rajkumar Jalan, Louis Yun, Ivy Pei-Shan Hsu
  • Patent number: 8024441
    Abstract: A global server load-balancing (GSLB) switch serves as a proxy to an authoritative DNS and communicates with numerous site switches that are coupled to host servers serving specific applications. The GSLB switch receives from site switches operational information regarding host servers within the site switches neighborhood. When a client program requests a resolution of a host name, the GSLB switch, acting as a proxy of an authoritative DNS, returns one or more ordered IP addresses for the host name. The IP addresses are ordered using metrics that include the information collected from the site switches. In one instance, the GSLB switch places the address that is deemed “best” at the top of the list.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: September 20, 2011
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Sunanda Lakshmi Kommula, Ivy Pei-Shan Hsu, Rajkumar Jalan, David Chun Ying Cheung
  • Patent number: 8014301
    Abstract: Systems and methods are described for providing network route redundancy through Layer 2 devices, such as a loop free Layer 2 network having a plurality of switching devices. A virtual switch is coupled to the loop free Layer 2 network, the virtual switch having two or more switches configured to transition between master and backup modes to provide redundant support for the loop free Layer 2 network, the switches communicating their status through use of a plurality of redundancy control packets. The system also includes means for allowing the redundancy control packets to be flooded through the Layer 2 network. The means may include time-to-live data attached to the redundancy control packet which is decremented only when the packets are transferred through devices which are configured to recognize the protocol used in redundancy control packets.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: September 6, 2011
    Assignee: Brocade Communications Systems, Inc.
    Inventors: Andrew Tai-Chin Kuo, Ivy Pei-Shan Hsu, Jordi Moncada-Elias, Rajkumar Jalan, Gurudeep Kamat