Patents by Inventor Hasmit Grover

Hasmit Grover 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: 9858163
    Abstract: Devices, methods and instructions encoded on computer readable medium for implementation of a dual-adjacency between edge devices of a network site. A first edge device comprises one or more local interfaces configured for communication, via a local network, with one or more network devices co-located in a first network site. The first edge device also comprises one or more overlay interfaces configured for communication, via a core network, with one or more network devices located in one or more other network sites connected to the core network. The first edge device comprises a processor configured to establish, via at least one of the local interfaces, a site communication channel with a second edge device co-located in the first network site. The processor is further configured to establish an overlay communication channel, via at least one of the overlay interfaces, with the second edge device.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: January 2, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Dhananjaya Rao, Victor M. Moreno, Hasmit Grover, Gaurav Badoni
  • Patent number: 9736054
    Abstract: Methods and systems may be provided for installing a route entry associated with multicast traffic to a memory. Client devices may be notified of the route entry for advertisement by an active source device. The delivery group and delivery source may be retrieved from the information for the route entry. Multicast data trees may maintain delivery group and delivery source information for access.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: August 15, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Nataraj Bacthu, Ashok Chippa, Hasmit Grover, Raghava Sivaramu, Dino Farinacci
  • Patent number: 9548887
    Abstract: Techniques are provided for designating, in an overlay transport virtualization (OTV) network connected to a data center, an edge device to act as a backup authoritative edge device (BAED) for an authoritative edge device (AED) for multicast packet encapsulation and forwarding. Data traffic associated with a given virtual local area network (VLAN) may be detected from a multicast source in the data center addressed to recipients in a site group. A mapping may be generated between the site group and a core data group in the OTV network for traffic from the multicast source. Advertisements may be sent of the mapping to edge devices in another data center across the OTV network. A similar configuration is presented for a BAED for inbound multicast traffic to a data center.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: January 17, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Vrushali Ashtaputre, Gaurav Badoni, Dhananjaya Rao, Sreenivas Duvvuri, Hasmit Grover
  • Patent number: 9521073
    Abstract: In some embodiments, edge devices associated with a network segment are identified. One of the devices is elected as an authoritative device and any previous authoritative devices are instructed to halt forwarding network traffic to an overlay network.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: December 13, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Dhananjaya Rao, Hasmit Grover, Shekher Bulusu
  • Patent number: 9363225
    Abstract: In one embodiment, a method includes building an address resolution cache for a layer-3 router in a first layer-2 datacenter, where the address resolution cache includes a plurality of entries, each of the entries containing a host network address, a host hardware address, and a switch identifier for a switch serving a host, intercepting an address resolution flood within the first layer-2 datacenter that seeks address resolution for a host in a second layer-2 datacenter, and generating a response to the address resolution flood that indicates a source in the second layer-2 datacenter, where data indicating the source in the second layer-2 datacenter is accessed from the address resolution cache.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: June 7, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Victor Moreno, Dhananjaya Rao, Sanjay Sane, Sameer Merchant, Hasmit Grover
  • Patent number: 9338078
    Abstract: A link state information correction scheme is implemented by the present disclosure. In one embodiment, the correction scheme is implemented by a reload logic module that cooperates with link state protocol logic configured on a reload routing element (or routing element that has reloaded or hard restarted). The reload logic module is configured to receive a database descriptor message at a reload routing element, where the database descriptor message is received from a neighbor routing element during an adjacency formation. The reload logic module is also configured to determine whether the database descriptor message identifies a stale version of a link state advertisement (LSA), where the LSA is self-originated by the reload routing element. The reload logic module is also configured to generate a new version of the LSA during the adjacency formation.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 10, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Madhukar Anand, Hasmit Grover, Paul Wells
  • Patent number: 9338084
    Abstract: Techniques are presented herein for optimizing traffic routing in overlay networks. At a first edge device located at a first site in a network, a message is received that indicates address information of a network device. The address information of the network device is stored in an address table. The address information is associated with a site identifier that identifies a second site at which the network device is located. The site identifier is mapped to an identifier associated with a second edge device that is responsible for routing traffic to network devices at the second site.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: May 10, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Gaurav Badoni, Dhananjaya Rao, Hasmit Grover, Senthil Kenchiah, Victor Moreno
  • Patent number: 9331974
    Abstract: In one embodiment, a method includes building an address resolution cache for a layer-3 router in a first layer-2 datacenter, where the address resolution cache includes a plurality of entries, each of the entries containing a host network address, a host hardware address, and a switch identifier for a switch serving a host, intercepting an address resolution flood within the first layer-2 datacenter that seeks address resolution for a host in a second layer-2 datacenter, and generating a response to the address resolution flood that indicates a source in the second layer-2 datacenter, where data indicating the source in the second layer-2 datacenter is accessed from the address resolution cache.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: May 3, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Victor Moreno, Dhananjaya Rao, Sanjay Sane, Sameer Merchant, Hasmit Grover
  • Patent number: 9300582
    Abstract: In one embodiment, a method includes receiving a packet at an edge device in a first network site in communication with a second network site through a transport network, the packet comprising a destination address for a host at the second network site, verifying at the edge device a connection with the host, and inserting the destination address in a forwarding information base at the edge device upon verifying the connection with the host. An apparatus and logic are also disclosed herein.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: March 29, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Hasmit Grover, Dhananjaya Rao, Victor Moreno
  • Patent number: 9288067
    Abstract: Devices, methods and instructions encoded on computer readable medium are provided herein for creation of an overlay network on a non-multicast or source specific multicast (SSM) core. In one example, virtual private network (VPN) adjacencies are established between an adjacency server and one or more edge devices each located at different network sites. A unicast replication list is then generated at the adjacency server. The unicast replication list includes the Internet Protocol addresses for each of the edge devices having VPN adjacencies with the adjacency server. The unicast replication list is then advertised to each of the edge devices for use in establishing VPN adjacencies with one another.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: March 15, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Dino Farinacci, Gaurav Badoni, Hasmit Grover, Dhananjaya Rao, Nataraj Bacthu
  • Publication number: 20150254149
    Abstract: Devices, methods and instructions encoded on computer readable medium for implementation of a dual-adjacency between edge devices of a network site. A first edge device comprises one or more local interfaces configured for communication, via a local network, with one or more network devices co-located in a first network site. The first edge device also comprises one or more overlay interfaces configured for communication, via a core network, with one or more network devices located in one or more other network sites connected to the core network. The first edge device comprises a processor configured to establish, via at least one of the local interfaces, a site communication channel with a second edge device co-located in the first network site. The processor is further configured to establish an overlay communication channel, via at least one of the overlay interfaces, with the second edge device.
    Type: Application
    Filed: May 26, 2015
    Publication date: September 10, 2015
    Inventors: Dhananjaya Rao, Victor M. Moreno, Hasmit Grover, Gaurav Badoni
  • Patent number: 9071458
    Abstract: Devices, methods and instructions encoded on computer readable medium for implementation of a dual-adjacency between edge devices of a network site. A first edge device comprises one or more local interfaces configured for communication, via a local network, with one or more network devices co-located in a first network site. The first edge device also comprises one or more overlay interfaces configured for communication, via a core network, with one or more network devices located in one or more other network sites connected to the core network. The first edge device comprises a processor configured to establish, via at least one of the local interfaces, a site communication channel with a second edge device co-located in the first network site. The processor is further configured to establish an overlay communication channel, via at least one of the overlay interfaces, with the second edge device.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: June 30, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Dhananjaya Rao, Victor M. Moreno, Hasmit Grover, Gaurav Badoni
  • Publication number: 20150043329
    Abstract: Techniques are provided for designating, in an overlay transport virtualization (OTV) network connected to a data center, an edge device to act as a backup authoritative edge device (BAED) for an authoritative edge device (AED) for multicast packet encapsulation and forwarding. Data traffic associated with a given virtual local area network (VLAN) may be detected from a multicast source in the data center addressed to recipients in a site group. A mapping may be generated between the site group and a core data group in the OTV network for traffic from the multicast source. Advertisements may be sent of the mapping to edge devices in another data center across the OTV network. A similar configuration is presented for a BAED for inbound multicast traffic to a data center.
    Type: Application
    Filed: February 18, 2014
    Publication date: February 12, 2015
    Applicant: Cisco Technology, Inc.
    Inventors: Vrushali Ashtaputre, Gaurav Badoni, Dhananjaya Rao, Sreenivas Duvvuri, Hasmit Grover
  • Publication number: 20150019697
    Abstract: In one embodiment, an authoritative edge device (AED)-server in a computer network maintains assignment of an active AED for a particular virtual local area network (VLAN), and in response to a triggered re-assignment, sends an AED change request identifying an old active AED for the particular VLAN and a new active AED for the particular VLAN (e.g., and/or corresponding backups). In response to receiving the change request, the old active AED ceases forwarding of traffic for the particular VLAN and transmits a relinquishment confirmation into the network. Also, in response to receiving the change request and the relinquishment confirmation from the old active AED, the new active AED assumes responsibility for traffic forwarding for the particular VLAN and transmits an activation confirmation into the network. The change request is then deemed completed by the AED-sever upon receipt of both the relinquishment confirmation and the activation confirmation.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventors: Gaurav Badoni, Dhananjaya Rao, Hasmit Grover, Senthil Kenchiah, Vrushali Ashtaputre
  • Publication number: 20140307541
    Abstract: Techniques are presented herein for optimizing traffic routing in overlay networks. At a first edge device located at a first site in a network, a message is received that indicates address information of a network device. The address information of the network device is stored in an address table. The address information is associated with a site identifier that identifies a second site at which the network device is located. The site identifier is mapped to an identifier associated with a second edge device that is responsible for routing traffic to network devices at the second site.
    Type: Application
    Filed: August 12, 2013
    Publication date: October 16, 2014
    Applicant: Cisco Technology, Inc
    Inventors: Gaurav Badoni, Dhananjaya Rao, Hasmit Grover, Senthil Kenchiah, Victor Moreno
  • Publication number: 20140269407
    Abstract: A link state information correction scheme is implemented by the present disclosure. In one embodiment, the correction scheme is implemented by a reload logic module that cooperates with link state protocol logic configured on a reload routing element (or routing element that has reloaded or hard restarted). The reload logic module is configured to receive a database descriptor message at a reload routing element, where the database descriptor message is received from a neighbor routing element during an adjacency formation. The reload logic module is also configured to determine whether the database descriptor message identifies a stale version of a link state advertisement (LSA), where the LSA is self-originated by the reload routing element. The reload logic module is also configured to generate a new version of the LSA during the adjacency formation.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: Cisco Technology, Inc.
    Inventors: Madhukar Anand, Hasmit Grover, Paul Wells
  • Publication number: 20140169368
    Abstract: In one embodiment, a method includes receiving a packet at an edge device in a first network site in communication with a second network site through a transport network, the packet comprising a destination address for a host at the second network site, verifying at the edge device a connection with the host, and inserting the destination address in a forwarding information base at the edge device upon verifying the connection with the host. An apparatus and logic are also disclosed herein.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Hasmit Grover, Dhananjaya Rao, Victor Moreno
  • Publication number: 20140112203
    Abstract: In some embodiments, edge devices associated with a network segment are identified. One of the devices is elected as an authoritative device and any previous authoritative devices are instructed to halt forwarding network traffic to an overlay network.
    Type: Application
    Filed: October 18, 2012
    Publication date: April 24, 2014
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Dhananjaya Rao, Hasmit Grover, Shekher Bulusu
  • Patent number: 8694664
    Abstract: Techniques are provided for two peer edge switches in an edge switch cluster of a first data center site to actively provide traffic flow redundancy in an active-active configuration and provide multi-homing support over an overlay transport virtualization (OTV) protocol. Information is stored indicating a media access control (MAC) address of at least one endpoint device at the first site. An edge switch in the edge switch cluster at the first site sends via an OTV protocol a Layer-3 message that is configured to advertise the MAC address of the at least one endpoint at the first site to enable at least one edge switch at a second site to perform multipath routing to the endpoint device at the first site based on each of the edge switches in the edge switch cluster at the first site.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: April 8, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Saurabh Jain, Sanjay Sane, Sameer Merchant, Chandan Mishra, Hasmit Grover, Dhananjaya Rao
  • Patent number: 8645576
    Abstract: In one embodiment, an apparatus includes one or more internal interfaces in communication with one or more network devices in a first network site through a Layer 2 link, an overlay interface in communication through a Layer 3 link with a core network connected to one or more other network sites, and a table mapping addresses for network devices in the other network sites to addresses of edge devices in the same network site as the network device. The apparatus further includes a processor operable to encapsulate a packet received at one of the internal interfaces and destined for one of the network devices in the other network sites, with an IP header including a destination address of the edge device mapped to the destination network device, and forward the encapsulated packet to the core network.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: February 4, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Dino Farinacci, Tony Speakman, Nair Venugopal, Hasmit Grover, Victor Moreno, Dhananjaya Rao