Patents by Inventor Vibin Varghese

Vibin Varghese 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).

  • Publication number: 20210288924
    Abstract: Presented are efficient systems and methods for automatically detecting and configuring network connections in Fibre Channel (FC) and similar networks. In various embodiments, this is accomplished by using an I/O module (IOM)'s fabric login (FLOGI) response or FLOGI request to identify the type of an uplink interface as either FC Gateway or FC Direct Attach, determining whether server interfaces coupled to the IOM support FCoE, and then, automatically configuring server interfaces based on the identified type of uplink interface.
    Type: Application
    Filed: March 13, 2020
    Publication date: September 16, 2021
    Applicant: DELL PRODUCTS L.P.
    Inventors: Ramesh Kumar SUBBIAH, Vibin VARGHESE
  • Publication number: 20210288923
    Abstract: Systems and methods for handling soft zoning violations comprise assigning a first target device and an endpoint device that is coupled to a switch port of a Fibre Channel (FC) switch to a zone(s). In embodiments, in response to the endpoint device logging into the FC switch, sampled traffic that originates at the endpoint device and ingresses at the switch port may be obtained. In response to determining that the sampled traffic comprises a second traffic that is intended for a second target device that has not been assigned to the zone(s), some action to restrict the second traffic may be performed such as to restrict the non-assigned traffic and prevent devices from sending potentially harmful traffic to other devices that are not assigned to a same zone.
    Type: Application
    Filed: March 10, 2020
    Publication date: September 16, 2021
    Applicant: DELL PRODUCTS L.P.
    Inventors: Ramesh Kumar SUBBIAH, Vibin VARGHESE
  • Publication number: 20210281441
    Abstract: A Storage Area Network (SAN) access includes a first aggregated switch device that is coupled to a host device, a Local Area Network (LAN), and a SAN, and a second aggregated switch device that is coupled to the host device, the LAN, and the SAN. The second aggregated switch device is connected to the first aggregated switch device via an Inter-Chassis Link (ICL). The second aggregated switch device detect that the ICL has become unavailable and, in response, prevents Internet Protocol traffic between the host device and the LAN while transmitting storage traffic between the host device and the SAN.
    Type: Application
    Filed: March 6, 2020
    Publication date: September 9, 2021
    Inventors: Avinash Jayakumar, Vibin Varghese, Ramesh Kumar Subbiah
  • Patent number: 11106614
    Abstract: An ALUA path selection system includes a networking device in a networking fabric that couples a host device to a storage subsystem. The networking device receives a host device communication generated by the host device and retrieves a host device hop count that identifies a number of hops between the host device and the networking device. The networking device also receives a storage subsystem communication generated by the storage subsystem and retrieves a storage subsystem hop count that identifies a number of hops between the storage subsystem and the networking device. When the networking device receives a hop count request from the host device, it transmits the host device hop count and/or the storage subsystem hop count to the host device, and the host device uses the host device hop count and/or the storage subsystem hop count to select an active-optimized path to a LUN included in the storage subsystem.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: August 31, 2021
    Assignee: Dell Products L.P.
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210258247
    Abstract: Data Center Bridge (DCB)-based path selection methods and systems reduce packet loss in a network system comprising a Link Aggregation Group (LAG) topology. In embodiments, once traffic received at a LAG node and identified as DCB traffic, links whose DCB status are identified as “up” are assigned to a LAG sub-trunk that may be used to forward the DCB traffic on the LAG trunk, while non-DCB traffic is forwarded to any member of the LAG, irrespective of DCB status. In addition, DCB traffic received from a LAG peer node, which sends traffic on an inter-node link (INL) when no DCB-enabled links to a downstream device are present, is identified as DCB traffic and forwarded on a LAG sub-trunk that comprises DCB-enabled links. An egress mask that indicates to not forward the traffic received at the LAG node on the INL may be overridden, such that DCB traffic may be forwarded.
    Type: Application
    Filed: February 5, 2021
    Publication date: August 19, 2021
    Applicant: DELL PRODUCTS L.P.
    Inventors: Saravanan OBULISAMI, Ramesh Kumar SUBBIAH, Vibin VARGHESE
  • Patent number: 11093147
    Abstract: An ALUA path distribution system includes host devices coupled to storage subsystems by aggregated networking devices. A first aggregated networking device snoops communications between the host devices and the storage subsystems to identify first snooped information, retrieves second snooped information identified by a second aggregated networking device, and uses the snooped information to build a path distribution table identifying each active-optimized path provided by the aggregated networking devices between the host devices and respective LUNs on the storage subsystems.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: August 17, 2021
    Assignee: Dell Products L.P.
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Patent number: 11096108
    Abstract: An ALUA path selection system includes a networking device in a networking fabric that couples a host device to a storage subsystem. The networking device receives a host device communication generated by the host device and retrieves a host device hop count that identifies a number of hops between the host device and the networking device. The networking device also receives a storage subsystem communication generated by the storage subsystem and retrieves a storage subsystem hop count that identifies a number of hops between the storage subsystem and the networking device. When the networking device receives a hop count request from the host device, it transmits the host device hop count and/or the storage subsystem hop count to the host device, and the host device uses the host device hop count and/or the storage subsystem hop count to select an active-optimized path to a LUN included in the storage subsystem.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: August 17, 2021
    Assignee: Dell Products L.P.
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Patent number: 11088908
    Abstract: An FCoE pinning system includes a second switch device that is coupled to a first switch device via a link aggregation group (LAG). The second switch device transmits a first communication that indicates a first port that is included on the second switch device and that is coupled to a first member of the LAG has a first FCoE pinning configuration and is in a willing mode. In response to determining that a second communication received from the first switch device indicates that a second port that is included on the first switch device and that is coupled to a second member link of the LAG has a second FCoE pinning configuration, and that the first switch device is in a willing mode, the second switch device forwards, in response to determining that no mismatch exists between the FCoE pinning configurations, FCoE type traffic via the first port.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: August 10, 2021
    Assignee: Dell Products L.P.
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210184992
    Abstract: A Fibre Channel over Ethernet (FCoE) network can be inexpensively extended by additional switches (220x) that do not have a full FCoE functionality, e.g. do not have full E-port functionality. The additional switches may or may not have unique Domain IDs. A virtual switch fabric can be extended by such additional switches.
    Type: Application
    Filed: February 8, 2021
    Publication date: June 17, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210176121
    Abstract: An automatic fabric provisioning system includes first uplink switch device(s) associated with a first fabric, and second uplink switch device(s) associated with a second fabric. A gateway device is coupled to each of the first and second uplink switch device(s), and transmits a respective fabric login communication to each of the first uplink switch device(s) via at least one first uplink, and to each of the second uplink switch device(s) via at least one second uplink. When the gateway device receives respective first fabric login accept communication(s) from each of the uplink switch device(s) via the at least one uplink to that uplink switch device that identifies the fabric associated with that uplink switch device, it automatically associates each at least one first uplink with the first fabric, and each at least one second uplink with the second fabric.
    Type: Application
    Filed: December 6, 2019
    Publication date: June 10, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210126827
    Abstract: An FCoE pinning system includes a second switch device that is coupled to a first switch device via a link aggregation group (LAG). The second switch device transmits a first communication that indicates a first port that is included on the second switch device and that is coupled to a first member of the LAG has a first FCoE pinning configuration and is in a willing mode. In response to determining that a second communication received from the first switch device indicates that a second port that is included on the first switch device and that is coupled to a second member link of the LAG has a second FCoE pinning configuration, and that the first switch device is in a willing mode, the second switch device forwards, in response to determining that no mismatch exists between the FCoE pinning configurations, FCoE type traffic via the first port.
    Type: Application
    Filed: October 29, 2019
    Publication date: April 29, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210127315
    Abstract: An ALUA path selection system includes a networking device in a networking fabric that couples a host device to a storage subsystem. The networking device receives a host device communication generated by the host device and retrieves a host device hop count that identifies a number of hops between the host device and the networking device. The networking device also receives a storage subsystem communication generated by the storage subsystem and retrieves a storage subsystem hop count that identifies a number of hops between the storage subsystem and the networking device. When the networking device receives a hop count request from the host device, it transmits the host device hop count and/or the storage subsystem hop count to the host device, and the host device uses the host device hop count and/or the storage subsystem hop count to select an active-optimized path to a LUN included in the storage subsystem.
    Type: Application
    Filed: October 29, 2019
    Publication date: April 29, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210124515
    Abstract: An ALUA path distribution system includes host devices coupled to storage subsystems by aggregated networking devices. A first aggregated networking device snoops communications between the host devices and the storage subsystems to identify first snooped information, retrieves second snooped information identified by a second aggregated networking device, and uses the snooped information to build a path distribution table identifying each active-optimized path provided by the aggregated networking devices between the host devices and respective LUNs on the storage subsystems.
    Type: Application
    Filed: October 25, 2019
    Publication date: April 29, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210126709
    Abstract: A zone merging system includes a first FC networking device that is associated with one or more first FC networking device zones and a second FC networking device that is associated with one or more second FC networking device zones, wherein each of the one or more first and second FC networking device zones identifies a plurality of zone member devices. The second FC networking device performs limited zone merging operations subsequent to establishing a link with the first FC networking device. The limited zone merging operations include merging, via the link with first FC networking device zones, each of the second FC networking device zones that identifies at least one zone member device that is not local to the second FC networking device, while not merging each of the second FC networking device zones that identify only zone members that are local to the second FC networking device.
    Type: Application
    Filed: October 29, 2019
    Publication date: April 29, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210126862
    Abstract: An ALUA path distribution system includes host devices coupled to storage subsystems by aggregated networking devices. A first aggregated networking device snoops communications between the host devices and the storage subsystems to identify first snooped information, receives second snooped information identified by a second aggregated networking device, and uses the snooped information to build a path distribution table identifying each active-optimized path provided by the aggregated networking devices between the host devices and respective LUNs on the storage subsystems.
    Type: Application
    Filed: December 16, 2019
    Publication date: April 29, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210124702
    Abstract: An ALUA path selection system includes a networking device in a networking fabric that couples a host device to a storage subsystem. The networking device receives a host device communication generated by the host device and retrieves a host device hop count that identifies a number of hops between the host device and the networking device. The networking device also receives a storage subsystem communication generated by the storage subsystem and retrieves a storage subsystem hop count that identifies a number of hops between the storage subsystem and the networking device. When the networking device receives a hop count request from the host device, it transmits the host device hop count and/or the storage subsystem hop count to the host device, and the host device uses the host device hop count and/or the storage subsystem hop count to select an active-optimized path to a LUN included in the storage subsystem.
    Type: Application
    Filed: December 16, 2019
    Publication date: April 29, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Patent number: 10958596
    Abstract: A Fibre Channel over Ethernet (FCoE) network can be inexpensively extended by additional switches (220x) that do not have a full FCoE functionality, e.g. do not have full E-port functionality. The additional switches may or may not have unique Domain IDs. A virtual switch fabric can be extended by such additional switches.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: March 23, 2021
    Assignee: Dell Products L.P.
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Publication number: 20210084394
    Abstract: A Fibre Channel Forwarder (FCF) routing system includes a target device coupled to a Fibre Channel (FC) networking device via a first link, and a Fibre Channel Forwarder (FCF) device that is coupled to an initiator device via a second link, the FC networking device via a third link that is mapped to the second link, and the FC networking device via a fourth link that is mapped to the second link. The FCF device receives, via the second link, first traffic that originates from the initiator device and that is addressed to the target device. The FCF device determines, using an initiator device identifier included in the first traffic and a link mapping table, that the third link and the fourth link are mapped to the second link on which the first traffic was received and load balances the first traffic between the third link and the fourth link.
    Type: Application
    Filed: September 12, 2019
    Publication date: March 18, 2021
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese
  • Patent number: 10951517
    Abstract: Data Center Bridge (DCB)-based path selection methods and systems reduce packet loss in a network system comprising a Link Aggregation Group (LAG) topology. In embodiments, once traffic received at a LAG node and identified as DCB traffic, links whose DCB status are identified as “up” are assigned to a LAG sub-trunk that may be used to forward the DCB traffic on the LAG trunk, while non-DCB traffic is forwarded to any member of the LAG, irrespective of DCB status. In addition, DCB traffic received from a LAG peer node, which sends traffic on an inter-node link (INL) when no DCB-enabled links to a downstream device are present, is identified as DCB traffic and forwarded on a LAG sub-trunk that comprises DCB-enabled links. An egress mask that indicates to not forward the traffic received at the LAG node on the INL may be overridden, such that DCB traffic may be forwarded.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: March 16, 2021
    Assignee: DELL PRODUCTS L.P.
    Inventors: Saravanan Obulisami, Ramesh Kumar Subbiah, Vibin Varghese
  • Patent number: 10938746
    Abstract: An adaptive switch port role configuration system includes a first switch coupled to port on a second switch by an ISL, with end devices coupled to the second switch. The second switch transmits a port reconfiguration message to the first switch via the ISL while operating as a leaf switch with the port configured as an E port and, in response to an acceptance, performs link reset operations including reconfiguring the port as an N port. The second switch then transmits a FLOGI message for the port configured as the N port to the first switch via the ISL and, in response to an acceptance, transmits a respective FDISC message via the first ISL to the first switch for each of the end devices. The second switch then receives a response for each FDISC message, and uses end device addresses included in the responses to operate as an NPIV gateway.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: March 2, 2021
    Assignee: Dell Products L.P.
    Inventors: Ramesh Kumar Subbiah, Vibin Varghese