公开(公告)号：US08842694B2

公开(公告)日：2014-09-23

申请号：US13444556

申请日：2012-04-11

Applicant: Luca Cafiero ,  Silvano Gai

Inventor： Luca Cafiero ,  Silvano Gai

IPC: H04J3/22

CPC classification number: H04L47/522 ,  H04L12/4625 ,  H04L61/106 ,  H04L61/6022 ,  H04L61/6045

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.

Abstract translation: 本发明提供了用于实现低延迟以太网（“LLE”）解决方案的方法和设备，这也被称为数据中心以太网（“DCE”）解决方案，其简化了数据中心的连接性并提供了高带宽，低 用于承载以太网和存储流量的延迟网络。 本发明的一些方面涉及将FC帧变换成适于在以太网上传输的格式。 本发明的一些优选实现在数据中心或类似网络的单个物理连接中实现多个虚拟通道（“VL”）。 一些VL是“下降”VL，具有类似以太网的行为，而其他VL是类似FC的行为的“不丢弃”通道。 本发明的一些优选实施方案提供了基于信用和VL的保证带宽。 使用小帧缓冲区时，主动缓冲区管理可实现高可靠性和低延迟。 优选地，用于主动缓冲器管理的规则对于丢弃和不丢弃VL是不同的。

公开(公告)号：US20130086266A1

公开(公告)日：2013-04-04

申请号：US13685435

申请日：2012-11-26

Applicant: SILVANO GAI ,  CLAUDIO DESANTI ,  JAMES PAUL RIVERS

Inventor： SILVANO GAI ,  CLAUDIO DESANTI ,  JAMES PAUL RIVERS

IPC: H04L12/24

CPC classification number: H04L41/00 ,  H04L63/101

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.

公开(公告)号：US08238347B2

公开(公告)日：2012-08-07

申请号：US11400671

申请日：2006-04-06

Applicant: Claudio DeSanti ,  Silvano Gai ,  Andrea Baldini

Inventor： Claudio DeSanti ,  Silvano Gai ,  Andrea Baldini

IPC: H04L12/28 ,  H04L12/56 ,  H04J3/16 ,  H04J3/22

CPC classification number: H04L29/12839 ,  H04L12/462 ,  H04L12/4633 ,  H04L29/12801 ,  H04L49/351 ,  H04L49/357 ,  H04L61/6004 ,  H04L61/6022 ,  H04L2212/00

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.

Abstract translation: 提供数据中心以太网（“DCE”）网络及相关方法和设备。 DCE网络简化了数据中心的连接性，并提供了高带宽，低延迟的网络，用于承载以太网，存储和其他流量。 包含FC寻址信息的光纤通道（“FC”）帧封装在以太网帧中，用于在数据中心以太网（“DCE”）网络上传输。 以太网地址字段可以指示该帧包括FC帧，例如通过使用D_MAC字段中的预定机构唯一标识符（“OUI”）代码，但也包括以太网寻址信息。 因此，无论这些交换机是否配置为根据FC协议进行操作，都可以通过DCE网络中的交换机正确转发封装的帧。 因此，只有DCE网络中的以太网交换机的子集才需要启用FC。 只有这样配置的交换机将需要FC Domain_ID。

公开(公告)号：US08160094B2

公开(公告)日：2012-04-17

申请号：US12485337

申请日：2009-06-16

Applicant: Luca Cafiero ,  Silvano Gai

Inventor： Luca Cafiero ,  Silvano Gai

IPC: H04J3/26

CPC classification number: H04L47/522 ,  H04L12/4625 ,  H04L61/106 ,  H04L61/6022 ,  H04L61/6045

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.

Abstract translation: 本发明提供了用于实现低延迟以太网（“LLE”）解决方案的方法和设备，这也被称为数据中心以太网（“DCE”）解决方案，其简化了数据中心的连接性并提供了高带宽，低 用于承载以太网和存储流量的延迟网络。 本发明的一些方面涉及将FC帧变换成适于在以太网上传输的格式。 本发明的一些优选实现在数据中心或类似网络的单个物理连接中实现多个虚拟通道（“VL”）。 一些VL是“下降”VL，具有类似以太网的行为，而其他VL是类似FC的行为的“不丢弃”通道。 本发明的一些优选实施方案提供了基于信用和VL的保证带宽。 使用小帧缓冲区时，主动缓冲区管理可实现高可靠性和低延迟。 优选地，用于主动缓冲器管理的规则对于丢弃和不丢弃VL是不同的。

公开(公告)号：US08004981B2

公开(公告)日：2011-08-23

申请号：US10463362

申请日：2003-06-17

Applicant: Davide Bergamasco ,  Deepak Sharma ,  Rajesh R A ,  Silvano Gai ,  Vibin P. Thomas

Inventor： Davide Bergamasco ,  Deepak Sharma ,  Rajesh R A ,  Silvano Gai ,  Vibin P. Thomas

IPC: H04L12/28

CPC classification number: H04L47/193 ,  H04L12/66 ,  H04L47/10 ,  H04L47/12 ,  H04L47/2491 ,  H04L47/27 ,  H04L47/283 ,  H04L47/30 ,  H04L47/323

Abstract: Methods and devices are provided for implementing flow control coordination in a gateway between a TCP/IP network and a second network. The second network may be any type of network, including another TCP/IP network. In some implementations, the throughput of the TCP/IP network is controlled by modifying the round trip time observed by a TCP connection. In other implementations, the throughput of the TCP/IP network is controlled by modifying the size of the TCP window.

Abstract translation: 提供了用于在TCP / IP网络和第二网络之间的网关中实现流控协调的方法和设备。 第二网络可以是任何类型的网络，包括另一个TCP / IP网络。 在一些实现中，通过修改TCP连接所观察到的往返时间来控制TCP / IP网络的吞吐量。 在其他实现中，通过修改TCP窗口的大小来控制TCP / IP网络的吞吐量。

公开(公告)号：US07934023B2

公开(公告)日：2011-04-26

申请号：US10726269

申请日：2003-12-01

Applicant: Murali Basavaiah ,  Satish Ambati ,  Magesh Iyengar ,  Thomas Edsall ,  Dinesh G. Dutt ,  Silvano Gai ,  Varagur V. Chandrasekaran

Inventor： Murali Basavaiah ,  Satish Ambati ,  Magesh Iyengar ,  Thomas Edsall ,  Dinesh G. Dutt ,  Silvano Gai ,  Varagur V. Chandrasekaran

IPC: G06F3/00

CPC classification number: G06F3/0659 ,  G06F3/0613 ,  G06F3/0635 ,  G06F3/067 ,  H04L67/1097

Abstract: A method and apparatus to improve the performance of a SCSI write over a high latency network. The apparatus includes a first Switch close to the initiator in a first SAN and a second Switch close to the target in a second SAN. In various embodiments, the two Switches are border switches connecting their respective SANs to a relatively high latency network between the two SANs. In addition, the initiator can be either directly connected or indirectly connected to the first Switch in the first SAN. The target can also be either directly or indirectly connected to the second Switch in the second SAN. During operation, the method includes the first Switch sending Transfer Ready (Xfr_rdy) frame(s) based on buffer availability to the initiating Host in response to a SCSI Write command from the Host directed to the target. The first and second Switches then coordinate with one another by sending Transfer Ready commands to each other independent of the target's knowledge. The second switch buffers the data received from the Host until the target indicates it is ready to receive the data. Since the Switches send frames to the initiating Host independent of the target, the Switches manipulate the OX_ID and RX_ID fields in the Fiber Channel header of the various commands associated with the SCSI Write. The OX_ID and RX_ID fields are manipulated so as to trap the commands and so that the Switches can keep track of the various commands associated with the SCSI write.

Abstract translation: 一种通过高延迟网络提高SCSI写入性能的方法和装置。 该设备包括靠近第一SAN中的发起者的第一交换机和在第二SAN中靠近目标的第二交换机。 在各种实施例中，两个交换机是将它们各自的SAN连接到两个SAN之间相对较高延迟的网络的边界交换机。 此外，启动器可以直接连接或间接连接到第一个SAN中的第一个交换机。 目标也可以直接或间接地连接到第二个SAN中的第二个交换机。 在操作期间，该方法包括响应于从指向目标的主机的SCSI写入命令，基于发起主机的缓冲区可用性的第一个交换机发送传输就绪（Xfr_rdy）帧。 第一个和第二个交换机然后通过发送传输就绪命令相互协调，独立于目标的知识。 第二个交换机缓存从主机接收的数据，直到目标指示它准备好接收数据。 由于交换机将发送帧发送到独立于目标的发起主机，交换机将处理与SCSI写入相关联的各种命令的光纤通道报头中的OX_ID和RX_ID字段。 操作OX_ID和RX_ID字段以捕获命令，以便交换机可以跟踪与SCSI写入相关联的各种命令。

公开(公告)号：US07782784B2

公开(公告)日：2010-08-24

申请号：US10409427

申请日：2003-04-07

Applicant: Pawan Agrawal ,  Sujatha Sundaraaraman ,  Ritu Aggarwal ,  Silvano Gai ,  Dinesh Ganapathy Dutt

Inventor： Pawan Agrawal ,  Sujatha Sundaraaraman ,  Ritu Aggarwal ,  Silvano Gai ,  Dinesh Ganapathy Dutt

IPC: H04J1/16

CPC classification number: H04L43/026 ,  H04L2212/00

Abstract: Methods and devices are provided for encapsulating FC frames from a network device as Ethernet frames. Preferably, the FC frames represent traffic for a plurality of ports of the network device. The encapsulated Ethernet frames may be input to a conventional network interface card of a personal computer (“PC”) or laptop. Therefore, encapsulating the FC frames allows an engineer to use software installed on a conventional PC to troubleshoot problems with a network using FC protocol. According to some aspects of the invention, FC frames may be truncated to various degrees, to allow smaller data frames to be output at an appropriate rate to the analyzing personal computer, laptop, etc.

Abstract translation: 提供了用于将来自网络设备的FC帧封装为以太网帧的方法和设备。 优选地，FC帧表示网络设备的多个端口的业务。 封装的以太网帧可以被输入到个人计算机（“PC”）或笔记本电脑的传统网络接口卡。 因此，封装FC帧允许工程师使用安装在常规PC上的软件来解决使用FC协议的网络的问题。 根据本发明的一些方面，FC帧可以被截断到各种程度，以允许以适当的速率向分析个人计算机，膝上型计算机等输出较小的数据帧。

公开(公告)号：US07599360B2

公开(公告)日：2009-10-06

申请号：US10034160

申请日：2001-12-26

Applicant: Thomas James Edsall ,  Dinesh Ganapathy Dutt ,  Silvano Gai

Inventor： Thomas James Edsall ,  Dinesh Ganapathy Dutt ,  Silvano Gai

IPC: H04L12/28

CPC classification number: H04L67/1097 ,  H04L12/4641 ,  H04L2212/00

Abstract: Methods and apparatus for encapsulating a packet or frame for transmission in a storage area network are disclosed. A packet or frame compatible with a standard protocol employed in the storage area network is received or generated. The packet or frame is then encapsulated with a virtual storage area network identifier. The packet or frame may further be encapsulated with at least one of a TTL value, MPLS information, and a type of traffic to be carried by the packet or frame. For instance, the type of traffic to be carried by the packet or frame may include Ethernet, Fibre Channel, and Infiniband. Once encapsulated, the encapsulated packet or frame is sent over the storage area network. For instance, the encapsulated packet or frame may be generated as well as transmitted by a switch over an inter-switch link in the storage area network.

Abstract translation: 公开了用于封装用于在存储区域网络中传输的分组或帧的方法和装置。 接收或产生与存储区域网络中采用的标准协议兼容的分组或帧。 然后使用虚拟存储区域网络标识符封装分组或帧。 分组或帧还可以用TTL值，MPLS信息和要由分组或帧携带的业务类型中的至少一个进行封装。 例如，由分组或帧携带的流量的类型可以包括以太网，光纤通道和Infiniband。 一旦被封装，封装的分组或帧通过存储区域网络发送。 例如，可以通过存储区域网络中的交换机间链路的交换机生成封装的分组或帧。

公开(公告)号：US20080320134A1

公开(公告)日：2008-12-25

申请号：US12199678

申请日：2008-08-27

Applicant: Thomas James Edsall ,  Silvano Gai

Inventor： Thomas James Edsall ,  Silvano Gai

IPC: G06F15/173

CPC classification number: G06F3/0605 ,  G06F3/0664 ,  G06F3/067

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.

Abstract translation: 公开了在存储区域网络的网络设备上实现存储虚拟化的方法和装置。 在网络设备的端口处接收帧或分组。 然后确定该帧或分组涉及代表存储区域网络的一个或多个物理存储单元上的一个或多个物理存储单元的虚拟存储单元的虚拟存储位置的访问。 然后获得一个或多个物理存储位置与虚拟存储位置之间的虚拟物理映射。 然后将新的或修改的帧或分组发送到由虚拟 - 物理映射指定的发起者或目标。

公开(公告)号：US07433948B2

公开(公告)日：2008-10-07

申请号：US10056238

申请日：2002-01-23

Applicant: Thomas James Edsall ,  Silvano Gai

Inventor： Thomas James Edsall ,  Silvano Gai

IPC: G06F15/173

CPC classification number: G06F3/0605 ,  G06F3/0664 ,  G06F3/067

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.

Abstract translation: 公开了在存储区域网络的网络设备上实现存储虚拟化的方法和装置。 在网络设备的端口处接收帧或分组。 然后确定该帧或分组涉及代表存储区域网络的一个或多个物理存储单元上的一个或多个物理存储单元的虚拟存储单元的虚拟存储位置的访问。 然后获得一个或多个物理存储位置与虚拟存储位置之间的虚拟物理映射。 然后将新的或修改的帧或分组发送到由虚拟 - 物理映射指定的发起者或目标。