Patents by Inventor Silvano Gai

Silvano Gai 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: 9515922
    Abstract: A distributed Fiber Channel over Ethernet (FCoE) Forwarder (FCF) and a distributed Fiber Channel Switch are described. The Distributed FCF is realized by instantiating respective connections between at least one Controlling FCF and a plurality of FCoE Data-Plane Forwarder (FDF) devices and between individual FDF devices. The Distributed FC Switch is realized by instantiating respective connections between at least one Controlling Switch and a plurality of FC Data-Plane Forwarder (FCDF) devices and between individual FCDF devices.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: December 6, 2016
    Assignee: Cisco Technology, Inc.
    Inventors: Claudio Desanti, Silvano Gai
  • Patent number: 9246743
    Abstract: In one embodiment, a Fibre Channel over Ethernet (FCoE) proxy point (FPP) that is connected to one or more end-point devices is coupled to one or more other FPPs, and to a FCoE control and management plane (F-CMP) server. The FPP provides data plane functionality. The F-CMP server provides control plane functionality. At least some control and management traffic received at the FPP is proxied between the F-CMP server and the one or more end point devices connected to the FPP. FCoE traffic received at the FPP from the one or more end point devices connected to the FPP is transmitted to the one or more other FPPs without the FCoE traffic traversing the F-CMP server. The transmitting is performed by data plane functionality of the FPP operating under directions from the control plane functionality of the F-CMP server.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: January 26, 2016
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Silvano Gai, Claudio Desanti, Marco Di Benedetto
  • Patent number: 9246834
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: January 26, 2016
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Cafiero, Silvano Gai
  • Patent number: 9219638
    Abstract: This document discusses, among other things, applying network policy at a network device. In an example embodiment fiber channel hard zoning information may be received that indicates whether a fiber channel frame is permitted to be communicated between two fiber channel ports. Some example embodiments include identifying a media access control addresses associated with the fiber channel ports. An example embodiment may include generating one or more access control entries based on the fiber channel identifications of the fiber channel ports and the zoning information. The access control entries may be distributes to an Ethernet port to be inserted into an existing access control list and used to enforce a zoning policy upon fiber channel over Ethernet frames.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: December 22, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Silvano Gai, Claudio DeSanti, James Paul Rivers
  • Patent number: 9009427
    Abstract: A technique is provided for implementing online mirroring of a volume in a storage area network. A first instance of the volume is instantiated at a first port of the fiber channel fabric for enabling I/O operations to be performed at the volume. One or more mirroring procedures may be performed at the volume. In at least one implementation, the first port is able to perform first I/O operations at the volume concurrently while the mirroring procedures are being performed at the first volume. In one implementation, the mirroring procedures may be implemented at a fabric switch of the storage area network. Additionally, in at least one implementation, multiple hosts may be provided with concurrent access to the volume during the mirroring operations without serializing the access to the volume.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: April 14, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Samar Sharma, Silvano Gai, Dinesh Dutt, Sanjaya Kumar, Umesh Mahajan
  • Publication number: 20150085867
    Abstract: A distributed Fiber Channel over Ethernet (FCoE) Forwarder (FCF) and a distributed Fibre Channel Switch are described. The Distributed FCF is realized by instantiating respective connections between at least one Controlling FCF and a plurality of FCoE Data-Plane Forwarder (FDF) devices and between individual FDF devices. The Distributed FC Switch is realized by instantiating respective connections between at least one Controlling Switch and a plurality of FC Data-Plane Forwarder (FCDF) devices and between individual FCDF devices.
    Type: Application
    Filed: December 3, 2014
    Publication date: March 26, 2015
    Inventors: Claudio Desanti, Silvano Gai
  • Publication number: 20150036499
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Application
    Filed: September 15, 2014
    Publication date: February 5, 2015
    Inventors: Luca Cafiero, Silvano Gai
  • Patent number: 8948176
    Abstract: A distributed Fiber Channel over Ethernet (FCoE) Forwarder (FCF) and a distributed Fiber Channel Switch are described. The Distributed FCF is realized by instantiating respective connections between at least one Controlling FCF and a plurality of FCoE Data-Plane Forwarder (FDF) devices and between individual FDF devices. The Distributed FC Switch is realized by instantiating respective connections between at least one Controlling Switch and a plurality of FC Data-Plane Forwarder (FCDF) devices and between individual FCDF devices. The components of the distributed FCF or Switch are collectively represented by a single Domain identifier (Domain_ID), and thus the distributed FCF or Switch appears to outside entities as a non-distributed FCF or Switch.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: February 3, 2015
    Assignee: Cisco Technology, Inc.
    Inventors: Claudio Desanti, Silvano Gai
  • Patent number: 8842694
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: September 23, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Luca Cafiero, Silvano Gai
  • Patent number: 8725854
    Abstract: Methods and apparatus for implementing storage virtualization on a network device of a storage area network are disclosed. A frame or packet is received at a port of the network device. It is then determined that the frame or packet pertains to access of a virtual storage location of a virtual storage unit representing one or more physical storage locations on one or more physical storage units of the storage area network. A virtual-physical mapping between the one or more physical storage locations and the virtual storage location is then obtained. A new or modified frame or packet is then sent to an initiator or a target specified by the virtual-physical mapping.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: May 13, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Thomas James Edsall, Silvano Gai
  • Patent number: 8625460
    Abstract: A Fiber Channel Switch which enables end devices in different Fabrics to communicate with one another while retaining their unique Fiber Channel Domain_IDs. The Switch is coupled to a first fabric having a first set of end devices and a second fabric having a second set of end devices. The Switch is configured to enable communication by the first set of end devices associated with the first fabric with the second set of end devices associated with the second set of end devices using the unique Domain_IDs of each of the first set and the second set of end devices. In one embodiment of the invention, the first and second fabrics are first and second Virtual Storage Array Networks (VSANs) respectively. In an alternative embodiment, the first fabric and the second fabric are separate physical fabrics.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: January 7, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Dinesh G. Dutt, Thomas Edsall, Ankur Jain, Silvano Gai, Subrata Banerjee, Davide Bergamasco, Bruno Raimondo, Rajeev Bhardwaj
  • Publication number: 20130329743
    Abstract: In one embodiment, a Fibre Channel over Ethernet (FCoE) proxy point (FPP) that is connected to one or more end-point devices is coupled to one or more other FPPs, and to a FCoE control and management plane (F-CMP) server. The FPP provides data plane functionality. The F-CMP server provides control plane functionality. At least some control and management traffic received at the FPP is proxied between the F-CMP server and the one or more end point devices connected to the FPP. FCoE traffic received at the FPP from the one or more end point devices connected to the FPP is transmitted to the one or more other FPPs without the FCoE traffic traversing the F-CMP server. The transmitting is performed by data plane functionality of the FPP operating under directions from the control plane functionality of the F-CMP server.
    Type: Application
    Filed: August 13, 2013
    Publication date: December 12, 2013
    Applicant: Cisco Technology, Inc.
    Inventors: Silvano Gai, Claudio Desanti, Marco Di Benedetto
  • Patent number: 8565231
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: October 22, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Silvano Gai, Thomas Edsall, Luca Cafiero, Davide Bergamasco, Dinesh Dutt, Flavio Bonomi
  • Patent number: 8532099
    Abstract: Increased usage of network links is provided and smaller forwarding tables are required. A combination of STP and Multipath methods may be implemented in a network. Frames may be forwarded between switches not only according to MAC addresses, but also according to switch IDs and local IDs. Switch IDs do not need to be globally unique, but should be unique within a particular network. Local IDs need only be unique within a particular switch. Some preferred implementations allow frames to be delivered in order to devices requiring in-order delivery. Preferably, core switches need only learn the switch IDs of each core switch and each edge switch, and the appropriate exit port(s) corresponding to each switch. Preferably, the forwarding tables of each edge switch indicate the addresses of each device attached to that edge switch, the address of each device that is in communication with an attached device and the address of every other switch in the network.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: September 10, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Lawrence Kreeger, Thomas Edsall, Elango Ganesan, Silvano Gai
  • Patent number: 8514856
    Abstract: In one embodiment, one or more Fiber Channel over Ethernet (FCoE) proxy points (FPPs) communicates control and management information with a separately housed FCoE control and management plane (F-CMP) server in order to direct data plane functionality of the FPPs. Each FPP also proxies control and management protocols between the F-CMP server and one or more FCoE end-point devices for which the FPP is responsible (on FCoE ports). Traffic received by the FPP may then be processed according to the directed data plane functionality, such that FCoE traffic transmitted between first and second FCoE end-point devices separated by the Ethernet network is directed over the Ethernet network end-to-end between correspondingly responsible FPPs without traversing the F-CMP server.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: August 20, 2013
    Assignee: Cisco Technology, Inc.
    Inventors: Silvano Gai, Claudio Desanti, Marco Di Benedetto
  • Publication number: 20130086266
    Abstract: This document discusses, among other things, applying network policy at a network device. In an example embodiment fibre channel hard zoning information may be received that indicates whether a fibre channel frame is permitted to be communicated between two fibre channel ports. Some example embodiments include identifying a media access control addresses associated with the fibre channel ports. An example embodiment may include generating one or more access control entries based on the fibre channel identifications of the fibre channel ports and the zoning information. The access control entries may be distributes to an Ethernet port to be inserted into an existing access control list and used to enforce a zoning policy upon fibre channel over Ethernet frames.
    Type: Application
    Filed: November 26, 2012
    Publication date: April 4, 2013
    Applicant: Cisco Technology, Inc.
    Inventors: SILVANO GAI, CLAUDIO DESANTI, JAMES PAUL RIVERS
  • Patent number: 8321908
    Abstract: This document discusses, among other things, applying network policy at a network device. In an example embodiment fiber channel hard zoning information may be received that indicates whether a fiber channel frame is permitted to be communicated between two fiber channel ports. Some example embodiments include identifying a media access control address associated with the fiber channel ports. An example embodiment may include generating one or more access control entries based on the fiber channel identifications of the fiber channel ports and the zoning information. The access control entries may be distributed to an Ethernet port to be inserted into an existing access control list and used to enforce a zoning policy upon fiber channel over Ethernet frames.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: November 27, 2012
    Assignee: Cisco Technology, inc.
    Inventors: Silvano Gai, Claudio DeSanti, James Paul Rivers
  • Patent number: 8295168
    Abstract: Methods and devices are provided for implementing security groups in an enterprise network. The security groups include first network nodes that are subject to rules governing communications between the first network nodes and second network nodes. An indicator, referred to as a security group tag (SGT), identifies members of a security group. In some embodiments, the SGT is provided in a field of a data packet reserved for layer 3 information or a field reserved for higher layers. However, in other embodiments, the SGT is provided in a field reserved for layer 1 or layer 2. In some embodiments, the SGT is not provided in a field used by interswitch links or other network fabric devices for the purpose of making forwarding decisions.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: October 23, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Silvano Gai, Thomas James Edsall
  • Patent number: 8238347
    Abstract: A Data Center Ethernet (“DCE”) network and related methods and device are provided. A DCE network simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet, storage and other traffic. A Fiber Channel (“FC”) frame, including FC addressing information, is encapsulated in an Ethernet frame for transmission on a Data Center Ethernet (“DCE”) network. The Ethernet address fields may indicate that the frame includes an FC frame, e.g., by the use of a predetermined Organization Unique Identifier (“OUI”) code in the D_MAC field, but also include Ethernet addressing information. Accordingly, the encapsulated frames can be forwarded properly by switches in the DCE network whether or not these switches are configured for operation according to the FC protocol. Accordingly, only a subset of Ethernet switches in the DCE network needs to be FC-enabled. Only switches so configured will require an FC Domain_ID.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: August 7, 2012
    Assignee: Cisco Technology, Inc.
    Inventors: Claudio DeSanti, Silvano Gai, Andrea Baldini
  • Publication number: 20120195310
    Abstract: The present invention provides methods and devices for implementing a Low Latency Ethernet (“LLE”) solution, also referred to herein as a Data Center Ethernet (“DCE”) solution, which simplifies the connectivity of data centers and provides a high bandwidth, low latency network for carrying Ethernet and storage traffic. Some aspects of the invention involve transforming FC frames into a format suitable for transport on an Ethernet. Some preferred implementations of the invention implement multiple virtual lanes (“VLs”) in a single physical connection of a data center or similar network. Some VLs are “drop” VLs, with Ethernet-like behavior, and others are “no-drop” lanes with FC-like behavior. Some preferred implementations of the invention provide guaranteed bandwidth based on credits and VL. Active buffer management allows for both high reliability and low latency while using small frame buffers. Preferably, the rules for active buffer management are different for drop and no drop VLs.
    Type: Application
    Filed: April 11, 2012
    Publication date: August 2, 2012
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Luca Cafiero, Silvano Gai