Patents by Inventor Ram Dular Singh
Ram Dular Singh 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: 10225184Abstract: A LRE (logical routing element) that have LIFs that are active in all host machines spanned by the LRE as well as LIFs that are active in only a subset of those spanned host machines is provided. A host machine having an active LIF for a particular L2 segment would perform the L3 routing operations for network traffic related to that L2 segment. A host machine having an inactive LIF for the particular L2 segment would not perform L3 routing operations for the network traffic of the L2 segment.Type: GrantFiled: August 31, 2015Date of Patent: March 5, 2019Assignee: NICIRA, INC.Inventors: Vivek Agarwal, Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Howard Wang, Ram Dular Singh
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Patent number: 10218526Abstract: A novel method of conducting multicast traffic in a network is provided. The network includes multiple endpoints that receive messages from the network and generate messages for the network. The endpoints are located in different segments of the network, each segment including one or more of the endpoints. For a source endpoint to replicate a particular message (e.g., a data packet) for all endpoints belonging to a particular replication group (i.e., multicast group) within the network, the source endpoint replicates the particular message to each endpoint within the source endpoint's own segment and to a proxy endpoint in each of the other segments. Each proxy endpoint in turn replicates the particular message to all endpoints belonging to the particular replication group within the proxy endpoint's own segment.Type: GrantFiled: January 31, 2018Date of Patent: February 26, 2019Assignee: NICIRA, INC.Inventors: Jianjun Shen, IV, Alexander Tessmer, Ram Dular Singh, Hua Wang, Da Wan
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Publication number: 20180276013Abstract: Some embodiments provide a method of operating several logical networks over a network virtualization infrastructure. The method defines a managed physical switching element (MPSE) that includes several ports for forwarding packets to and from a plurality of virtual machines. Each port is associated with a unique media access control (MAC) address. The metho defines several managed physical routing elements (MPREs) for the several different logical networks. Each MPRE is for receiving data packets from a same port of the MPSE. Each MPRE is defined for a different logical network and for routing data packets between different segments of the logical network. The method provides the defined MPSE and the defined plurality of MPREs to a plurality of host machines as configuration data.Type: ApplicationFiled: May 21, 2018Publication date: September 27, 2018Inventors: Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Vivek Agarwal, Howard Wang
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Patent number: 10020960Abstract: Virtualization software that includes a VDRB (virtual distributed router/bridge) module for performing L3 routing and/or bridging operations is provided. At least some of the VDRBs are configured as VDBs (virtual distributed bridge) for performing bridging operations between different network segments in a distributed manner. The bridging tasks of a network are partitioned among several VDBs of the network based on MAC addresses. MAC addresses of VMs or other types of network nodes belonging to an overlay logical network are partitioned into several shards, each shard of MAC addresses assigned to a VDB in the network. Each VDB assigned a shard of MAC addresses performs bridging when it receives a packet bearing a MAC address belonging to its assigned shard. A VDB does not perform bridging on packets that do not have MAC address that falls within the VDB's shard of MAC addresses.Type: GrantFiled: September 30, 2014Date of Patent: July 10, 2018Assignee: NICIRA, INC.Inventors: Howard Wang, Rahul Korivi Subramaniyam, Ganesan Chandrashekhar, Vivek Agarwal, Ram Dular Singh
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Publication number: 20180167316Abstract: A logical routing element (LRE) having multiple designated instances for routing packets from physical hosts (PH) to a logical network is provided. A PH in a network segment with multiple designated instances can choose among the multiple designated instances for sending network traffic to other network nodes in the logical network according to a load balancing algorithm. Each logical interface (LIF) of an LRE is defined to be addressable by multiple identifiers or addresses, and each LIF identifier or address is assigned to a different designated instance.Type: ApplicationFiled: February 7, 2018Publication date: June 14, 2018Inventors: Vivek Agarwal, Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Howard Wang
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Publication number: 20180159696Abstract: A novel method of conducting multicast traffic in a network is provided. The network includes multiple endpoints that receive messages from the network and generate messages for the network. The endpoints are located in different segments of the network, each segment including one or more of the endpoints. For a source endpoint to replicate a particular message (e.g., a data packet) for all endpoints belonging to a particular replication group (i.e., multicast group) within the network, the source endpoint replicates the particular message to each endpoint within the source endpoint's own segment and to a proxy endpoint in each of the other segments. Each proxy endpoint in turn replicates the particular message to all endpoints belonging to the particular replication group within the proxy endpoint's own segment.Type: ApplicationFiled: January 31, 2018Publication date: June 7, 2018Inventors: Jianjun Shen, IV, Alexander Tessmer, Ram Dular Singh, Hua Wang, Da Wan
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Patent number: 9977685Abstract: Some embodiments provide a method of operating several logical networks over a network virtualization infrastructure. The method defines a managed physical switching element (MPSE) that includes several ports for forwarding packets to and from a plurality of virtual machines. Each port is associated with a unique media access control (MAC) address. The method defines several managed physical routing elements (MPREs) for the several different logical networks. Each MPRE is for receiving data packets from a same port of the MPSE. Each MPRE is defined for a different logical network and for routing data packets between different segments of the logical network. The method provides the defined MPSE and the defined plurality of MPREs to a plurality of host machines as configuration data.Type: GrantFiled: December 20, 2013Date of Patent: May 22, 2018Assignee: NICIRA, INC.Inventors: Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Vivek Agarwal, Howard Wang
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Patent number: 9910686Abstract: Some embodiments provide a system that includes a first set of virtual machines belonging to a first overlay network and a second set of virtual machines belonging to a second overlay network. The first and second sets of virtual machines operate in several host machines, each of which includes a managed physical routing element (MPRE) for routing data packet between virtual machines in different overlay networks. A particular MPRE is configured as a bridge for routing packets between virtual machines that are in different overlay networks but in a same IP (internet protocol) subnet.Type: GrantFiled: December 20, 2013Date of Patent: March 6, 2018Assignee: NICIRA, INC.Inventors: Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Vivek Agarwal, Howard Wang
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Publication number: 20180048478Abstract: A novel method for performing replication of messages in a network that bridges one or more physical networks to an overlay logical network is provided. A physical gateway provides bridging between network nodes of a physical network and virtual machines in the overlay logical network by serving as an endpoint of the overlay logical network. The physical gateway does not replicate messages from the bridged physical network to destination endpoints in the overlay logical network directly, but instead tunnels the message-to-be-replicated to a designated tunnel endpoint in the overlay logical network. The designated tunnel endpoint in turn replicates the message that was tunneled to it to other endpoints in the overlay logical network.Type: ApplicationFiled: October 5, 2017Publication date: February 15, 2018Inventors: Alexander Tessmer, Mukesh Hira, Rajiv Krishnamurthy, Ram Dular Singh, Xuan Zhang, Hua Wang
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Patent number: 9893988Abstract: A logical routing element (LRE) having multiple designated instances for routing packets from physical hosts (PH) to a logical network is provided. A PH in a network segment with multiple designated instances can choose among the multiple designated instances for sending network traffic to other network nodes in the logical network according to a load balancing algorithm. Each logical interface (LIF) of an LRE is defined to be addressable by multiple identifiers or addresses, and each LIF identifier or address is assigned to a different designated instance.Type: GrantFiled: March 27, 2014Date of Patent: February 13, 2018Assignee: NICIRA, INC.Inventors: Vivek Agarwal, Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Howard Wang
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Patent number: 9887851Abstract: A novel method of conducting multicast traffic in a network is provided. The network includes multiple endpoints that receive messages from the network and generate messages for the network. The endpoints are located in different segments of the network, each segment including one or more of the endpoints. For a source endpoint to replicate a particular message (e.g., a data packet) for all endpoints belonging to a particular replication group (i.e., multicast group) within the network, the source endpoint replicates the particular message to each endpoint within the source endpoint's own segment and to a proxy endpoint in each of the other segments. Each proxy endpoint in turn replicates the particular message to all endpoints belonging to the particular replication group within the proxy endpoint's own segment.Type: GrantFiled: August 9, 2016Date of Patent: February 6, 2018Assignee: NICIRA, INC.Inventors: Jianjun Shen, IV, Alexander Tessmer, Ram Dular Singh, Hua Wang, Da Wan
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Patent number: 9794079Abstract: A novel method for performing replication of messages in a network that bridges one or more physical networks to an overlay logical network is provided. A physical gateway provides bridging between network nodes of a physical network and virtual machines in the overlay logical network by serving as an endpoint of the overlay logical network. The physical gateway does not replicate messages from the bridged physical network to destination endpoints in the overlay logical network directly, but instead tunnels the message-to-be-replicated to a designated tunnel endpoint in the overlay logical network. The designated tunnel endpoint in turn replicates the message that was tunneled to it to other endpoints in the overlay logical network.Type: GrantFiled: March 31, 2014Date of Patent: October 17, 2017Assignee: NICIRA, INC.Inventors: Alexander Tessmer, Mukesh Hira, Rajiv Krishnamurthy, Ram Dular Singh, Xuan Zhang, Hua Wang
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Patent number: 9785455Abstract: Some embodiments provide a system that includes several host machines for hosting several virtual machines and a physical network for interconnecting the host machines. Each host machine includes a managed physical switching element (MPSE) including several ports for performing link layer forwarding of packets to and from a set of virtual machines running on the host machine. Each port is associated with a unique media access control (MAC) address. Each host machine includes a managed routing element (MPRE) for receiving a data packet from a port of the MPSE and performing network layer routing in order to forward the received data packet from a first virtual machine of a first network segment to a second virtual machine of a second network segment.Type: GrantFiled: December 20, 2013Date of Patent: October 10, 2017Assignee: NICIRA, INC.Inventors: Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Vivek Agarwal, Howard Wang
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Patent number: 9768980Abstract: Virtualization software that includes a VDRB (virtual distributed router/bridge) module for performing L3 routing and/or bridging operations is provided. At least some of the VDRBs are configured as VDBs (virtual distributed bridge) for performing bridging operations between different network segments in a distributed manner. The bridging tasks of a network are partitioned among several VDBs of the network based on MAC addresses. MAC addresses of VMs or other types of network nodes belonging to an overlay logical network are partitioned into several shards, each shard of MAC addresses assigned to a VDB in the network. Each VDB assigned a shard of MAC addresses performs bridging when it receives a packet bearing a MAC address belonging to its assigned shard. A VDB does not perform bridging on packets that do not have MAC address that falls within the VDB's shard of MAC addresses.Type: GrantFiled: September 30, 2014Date of Patent: September 19, 2017Assignee: NICIRA, INC.Inventors: Rahul Korivi Subramaniyam, Howard Wang, Ganesan Chandrashekhar, Vivek Agarwal, Ram Dular Singh
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Publication number: 20170171061Abstract: A novel method for fully utilizing the multicast or broadcast capability of a physical network is provided. The method identifies segments of the network within which broadcast traffic, multicast traffic, or traffic to unknown recipients (BUM traffic) is allowed or enabled. The identified segment encompasses parts of the network that the BUM traffic is able reach while excluding parts of the network nodes that the BUM traffic is unable to reach. Each identified segment includes network nodes that are interconnected by physical network hardware that supports BUM traffic. The method identifies multiple BUM traffic segments in a given network that each supports its own BUM traffic. The different BUM traffic segments are interconnected by physical network hardware that does not support BUM network traffic. Each identified segment is assigned an identifier that uniquely distinguishes the identified segment from other identified segments.Type: ApplicationFiled: February 24, 2017Publication date: June 15, 2017Inventors: Alexander Tessmer, Ram Dular Singh, Ganesan Chandrashekhar
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Patent number: 9602392Abstract: A novel method for fully utilizing the multicast or broadcast capability of a physical network is provided. The method identifies segments of the network within which broadcast traffic, multicast traffic, or traffic to unknown recipients (BUM traffic) is allowed or enabled. The identified segment encompasses parts of the network that the BUM traffic is able reach while excluding parts of the network nodes that the BUM traffic is unable to reach. Each identified segment includes network nodes that are interconnected by physical network hardware that supports BUM traffic. The method identifies multiple BUM traffic segments in a given network that each supports its own BUM traffic. The different BUM traffic segments are interconnected by physical network hardware that does not support BUM network traffic. Each identified segment is assigned an identifier that uniquely distinguishes the identified segment from other identified segments.Type: GrantFiled: December 18, 2013Date of Patent: March 21, 2017Assignee: NICIRA, INC.Inventors: Alexander Tessmer, Ram Dular Singh, Ganesan Chandrashekhar
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Patent number: 9575782Abstract: Some embodiments provide a method for a computing device serving as a host machine in a logical network. The method executes several virtual machines that are in several different segments of the logical network. The method operates a managed physical routing element (MPRE) for routing data packets between different segments of the logical network. The MPRE includes several logical interfaces, each of which is for receiving data packets from a different segment of the logical network. Each of the logical interfaces is addressable by a network layer address. The method intercepts an Address Resolution Protocol (ARP) broadcast message when the destination address matches the network address of one of the logical interfaces. The method formulates an ARP reply to the ARP broadcast message.Type: GrantFiled: December 20, 2013Date of Patent: February 21, 2017Assignee: NICIRA, INC.Inventors: Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Ram Dular Singh, Vivek Agarwal, Howard Wang
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Publication number: 20170005924Abstract: A LRE (logical routing element) that have LIFs that are active in all host machines spanned by the LRE as well as LIFs that are active in only a subset of those spanned host machines is provided. A host machine having an active LIF for a particular L2 segment would perform the L3 routing operations for network traffic related to that L2 segment. A host machine having an inactive LIF for the particular L2 segment would not perform L3 routing operations for the network traffic of the L2 segment.Type: ApplicationFiled: August 31, 2015Publication date: January 5, 2017Inventors: Vivek Agarwal, Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Howard Wang, Ram Dular Singh
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Publication number: 20170005942Abstract: A LRE (logical routing element) that have LIFs that are active in all host machines spanned by the LRE as well as LIFs that are active in only a subset of those spanned host machines is provided. A host machine having an active LIF for a particular L2 segment would perform the L3 routing operations for network traffic related to that L2 segment. A host machine having an inactive LIF for the particular L2 segment would not perform L3 routing operations for the network traffic of the L2 segment.Type: ApplicationFiled: August 31, 2015Publication date: January 5, 2017Inventors: Vivek Agarwal, Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Howard Wang, Ram Dular Singh
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Publication number: 20170005918Abstract: A LRE (logical routing element) that have LIFs that are active in all host machines spanned by the LRE as well as LIFs that are active in only a subset of those spanned host machines is provided. A host machine having an active LIF for a particular L2 segment would perform the L3 routing operations for network traffic related to that L2 segment. A host machine having an inactive LIF for the particular L2 segment would not perform L3 routing operations for the network traffic of the L2 segment.Type: ApplicationFiled: August 31, 2015Publication date: January 5, 2017Inventors: Vivek Agarwal, Ganesan Chandrashekhar, Rahul Korivi Subramaniyam, Howard Wang, Ram Dular Singh