公开(公告)号：US20050018674A1

公开(公告)日：2005-01-27

申请号：US10894586

申请日：2004-07-20

申请人： Frank Dropps ,  Ernest Kohlwey ,  Edward Ross ,  Mark Owen

发明人： Frank Dropps ,  Ernest Kohlwey ,  Edward Ross ,  Mark Owen

IPC分类号： H04L12/56

CPC分类号： H04L49/506 ,  H04L49/357

摘要： A method and system for distributing credit using a fibre channel switch element is provided. The switch element includes, a wait threshold counter that is used to set up a status for a port that has to wait for certain duration to send a frame due to lack of buffer to buffer credit; a credit module that controls buffer to buffer credit for a transmit segment of the fibre channel switch element; and a virtual lane credit module with a counter that is incremented every time a frame assigned to a virtual lane is sent and decreased every time a VC_RDY is received. The method includes, determining if a VC_RDY primitive is received; and allocating credit to a virtual lane that is not at its maximum credit, after the VC_RDY primitive is received.

摘要翻译： 提供了一种使用光纤通道开关元件分配信用的方法和系统。 开关元件包括等待阈值计数器，其用于建立由于缺少缓冲器以缓冲信用而必须等待特定持续时间发送帧的端口的状态; 信用模块，其控制缓冲器以缓冲光纤通道开关元件的发送段的信用; 以及具有计数器的虚拟通道信用模块，每当每次接收到VC_RDY时，每发送一个分配给虚拟通道的帧时，该计数器递增和减小。 该方法包括：确定是否接收到VC_RDY原语; 并且在接收到VC_RDY原语之后，将信用分配给不在其最大信用的虚拟通道。

公开(公告)号：US20050030978A1

公开(公告)日：2005-02-10

申请号：US10894579

申请日：2004-07-20

申请人： Frank Dropps ,  Craig Verba ,  Gary Papenfuss ,  Ernest Kohlwey ,  Mark Owen

发明人： Frank Dropps ,  Craig Verba ,  Gary Papenfuss ,  Ernest Kohlwey ,  Mark Owen

IPC分类号： H04L12/56 ,  H04L12/28

CPC分类号： H04L47/28 ,  H04L47/10 ,  H04L47/32 ,  H04L49/25 ,  H04L49/254 ,  H04L49/3009 ,  H04L49/357

摘要： Method and system for routing fibre channel frames using a fibre channel switch element is provided. The method includes, inserting a time stamp value in a fibre channel frame that is received at a receive segment of the fibre channel switch element; determining if a timeout occurs after a frame arrives at a receive buffer; and processing the frame if the timeout occurred. The method also includes, determining if a delta time value, which provides an accumulated wait time for a frame, is present in frame data; subtracting the delta time stamp value from a global time stamp value and using the resulting time stamp value to determine frame timeout status in the fibre channel switch element. A timeout checker circuit declares a timeout after comparing a time stamp value that is inserted in a fibre channel frame with a programmed time out value and a global counter value.

摘要翻译： 提供了使用光纤通道开关元件路由光纤通道帧的方法和系统。 该方法包括：在光纤通道切换元件的接收段接收的光纤通道帧中插入时间戳值; 确定在帧到达接收缓冲器之后是否发生超时; 并且如果发生超时则处理该帧。 该方法还包括：确定提供帧的累积等待时间的增量时间值是否存在于帧数据中; 从全局时间戳值减去增量时间戳值，并使用所得到的时间戳值来确定光纤通道开关元件中的帧超时状态。 超时检查器电路在将插入光纤通道帧中的时间戳值与编程的超时值和全局计数器值进行比较后，声明超时。

公开(公告)号：US20060072473A1

公开(公告)日：2006-04-06

申请号：US10956501

申请日：2004-10-01

申请人： Frank Dropps ,  Ernest Kohlwey ,  Mark Owen

发明人： Frank Dropps ,  Ernest Kohlwey ,  Mark Owen

IPC分类号： H04L12/56

CPC分类号： H04L49/25 ,  H04L45/40 ,  H04L49/101 ,  H04L49/357

摘要： A high-speed Fibre Channel switch element in a Fibre Channel network is provided. The Fibre Channel switch element includes, a rate select module that allows a port in the Fibre Channel switch element to operate at a rate equal to and/or higher than 10 gigabits per second (“G”). The port may operate at 20G, 40G or at a rate greater than 40G. Also, a cut status is provided for cut-through routing between ports operating at different speed. Plural transmit and receive lines are used for port operation at a rate equal to or higher than 10G.

摘要翻译： 提供了光纤通道网络中的高速光纤通道交换机元件。 光纤通道开关元件包括速率选择模块，其允许光纤通道开关元件中的端口以等于和/或高于10吉比特每秒（“G”）的速率工作。 港口可以在20G，40G或大于40G的速率下运行。 此外，为在不同速度下工作的端口之间的直通路由提供了切割状态。 多个发送和接收线路以等于或高于10G的速率用于端口操作。

公开(公告)号：US20050018673A1

公开(公告)日：2005-01-27

申请号：US10894547

申请日：2004-07-20

申请人： Frank Dropps ,  Craig Verba ,  Gary Papenfuss ,  Ernest Kohlwey ,  Edward Ross

发明人： Frank Dropps ,  Craig Verba ,  Gary Papenfuss ,  Ernest Kohlwey ,  Edward Ross

IPC分类号： H04L12/56

CPC分类号： H04L49/25 ,  H04L49/10 ,  H04L49/357

摘要： A fibre channel switch element and method for routing fibre channel frames is provided. The switch element includes a receive segment that can add a virtual storage area network (“VSAN”) tagging header to frames that are received by the receive segment; and strip the VSAN tagging header before frames are sent to ports that do not support virtual fabric capability. The receive segment includes a table used for matching fabric extension parameters. An incoming frame's VSAN identity value is compared to a control word entry to generate a value used for routing the incoming frame. The table is used to determine if a frame is part of a virtual fabric. The routing table for each port is used to route frames and the routing table includes entries for supported virtual fabrics.

摘要翻译： 提供了一种用于路由光纤信道帧的光纤信道切换元件和方法。 交换单元包括接收段，其可以向由接收段接收的帧添加虚拟存储区域网络（“VSAN”）标记报头; 并在将帧发送到不支持虚拟结构能力的端口之前，剥离VSAN标记头。 接收段包括用于匹配结构扩展参数的表。 将输入帧的VSAN标识值与控制字条目进行比较，以生成用于路由传入帧的值。 该表用于确定帧是否是虚拟结构的一部分。 每个端口的路由表用于路由帧，路由表包括支持的虚拟结构的条目。

公开(公告)号：US20050018650A1

公开(公告)日：2005-01-27

申请号：US10894917

申请日：2004-07-20

申请人： Frank Dropps ,  Gary Papenfuss ,  Ernest Kohlwey

发明人： Frank Dropps ,  Gary Papenfuss ,  Ernest Kohlwey

IPC分类号： G06F13/38 ,  H04L12/28 ,  H04L12/56

CPC分类号： G06F13/385 ,  H04L49/101 ,  H04L49/357 ,  H04L49/65

摘要： A fibre channel switch element for routing fibre channel frame is provided. The switch element includes a fibre channel port that can be configured to support plural data transfer rates. The data transfer rate may be 1 G, 2 G, 4 G, 8 G or 10 G. The switch element includes a clock configuration module for providing a clock signal that is based on the data transfer rate. A receive segment of the fibre channel port sends a signal to a transmit segment to avoid an under flow condition. The receive segment also waits for a certain frame length after a fibre channel frame is written and before the fibre channel frame is read, depending upon a data transfer rate of a source port. Multiple lanes may be configured as a single 10 G multi lane port or as multiple individual ports.

摘要翻译： 提供了一种用于布线光纤通道帧的光纤通道开关元件。 开关元件包括可配置成支持多个数据传输速率的光纤通道端口。 数据传输速率可以是1G，2G，4G，8G或10G。开关元件包括用于提供基于数据传输速率的时钟信号的时钟配置模块。 光纤通道端口的接收段将信号发送到发送段，以避免流下状况。 根据源端口的数据传输速率，接收段在光纤通道帧被写入之后并且在光纤通道帧被读取之前也等待一定的帧长度。 多个通道可以配置为单个10 G多通道端口或多个独立端口。

公开(公告)号：US20050018680A1

公开(公告)日：2005-01-27

申请号：US10894627

申请日：2004-07-20

申请人： Frank Dropps ,  Ernest Kohlwey ,  Craig Verba

发明人： Frank Dropps ,  Ernest Kohlwey ,  Craig Verba

IPC分类号： H04L12/56 ,  H04L12/28

CPC分类号： H04L49/357 ,  H04L49/101 ,  H04L49/25 ,  H04L49/3009

摘要： A method and system for routing fibre channel frames using a fibre channel switch element is provided. The switch element includes, a look up table that is indexed by domain, area, a virtual storage area number and/or AL_PA values of frames entering the fibre channel switch element; and logic for generating a column select signal that is used to select a column from the look up table for frame routing information. The switch element also includes logic for validating a frame route by performing word depth match. A register is used to load look up table entries and column entries are selected based on the column select signal. The method includes, indexing a look up table with plural fibre channel frame header values; selecting a table value for routing a fibre channel frame based on a column select signal; and routing the frame if a route is valid.

摘要翻译： 提供了一种使用光纤通道切换元件路由光纤通道帧的方法和系统。 开关元件包括：由域，区域索引的查找表，进入光纤通道切换元件的帧的虚拟存储区域号和/或AL_PA值; 以及用于生成用于从查找表中选择用于帧路由信息的列的列选择信号的逻辑。 开关元件还包括通过执行词深度匹配来验证帧路由的逻辑。 一个寄存器用于加载查询表条目，并且基于列选择信号选择列条目。 该方法包括：索引具有多个光纤信道帧头值的查找表; 基于列选择信号选择用于路由光纤信道帧的表值; 并且如果路由有效，则路由该帧。

公开(公告)号：US20050018671A1

公开(公告)日：2005-01-27

申请号：US10894491

申请日：2004-07-20

申请人： Frank Dropps ,  Ernest Kohlwey ,  Gary Papenfuss

发明人： Frank Dropps ,  Ernest Kohlwey ,  Gary Papenfuss

IPC分类号： H04L12/42 ,  H04L12/56

CPC分类号： H04L12/42 ,  H04L47/245

摘要： A method and system for keeping an arbitrated loop open during a frame gap using a fibre channel switch element is provided. The switch element includes a port control module having a receive and transmit segment, wherein the transmit segment activates a timer whose value determines a duration during which the arbitrated loop remains open; determines if a last frame from a sequence of frames from a source port has been transmitted; modifies the timer value if a higher priority frame for transmission is unavailable; and keeps the arbitrated loop open until the timer reaches a certain value. If a higher priority frame is available for transmission before the timer value is modified then the higher priority frame is transmitted and the timer value is re-initialized.

摘要翻译： 提供了一种使用光纤通道开关元件在帧间隙期间保持仲裁环路打开的方法和系统。 开关元件包括具有接收和发送段的端口控制模块，其中发送段激活定时器，其值确定仲裁环路保持打开的持续时间; 确定来自源端口的帧序列的最后一帧是否已被发送; 如果传输的较高优先级帧不可用，则修改定时器值; 并保持仲裁循环打开，直到定时器达到一定值。 如果在修改定时器值之前有较高优先级的帧可用于发送，则发送较高优先级帧，并重新初始化定时器值。

公开(公告)号：US20050030893A1

公开(公告)日：2005-02-10

申请号：US10895175

申请日：2004-07-20

申请人： Frank Dropps ,  Edward Ross

发明人： Frank Dropps ,  Edward Ross

IPC分类号： H04L1/00 ,  H04L12/56

CPC分类号： H04L47/10 ,  H04L47/266 ,  H04L47/29 ,  H04L47/39 ,  H04L49/357

摘要： A method and system for detecting congestion and over-subscription in a fibre channel switch element is provided. A counter is updated if a frame cannot be transmitted due to lack of credit; then the counter value is compared to a threshold value; and an event is triggered if the counter value varies from the threshold value. Also, provided is a first register that maintains information regarding a rate at which a source port can transfer data; a counter that counts entries corresponding to a number of frames to be transmitted at a given time; and a second register that determines an over-subscription rate.

摘要翻译： 提供一种用于检测光纤通道切换元件中的拥塞和过度订阅的方法和系统。 如果由于信用不足而无法传输帧，则计数器将被更新; 然后将计数器值与阈值进行比较; 并且如果计数器值从阈值变化则触发事件。 此外，提供了第一寄存器，其保存关于源端口可以传送数据的速率的信息; 计数器，其计数与给定时间发送的帧数相对应的条目; 以及确定超过订阅率的第二寄存器。

公开(公告)号：US20060072616A1

公开(公告)日：2006-04-06

申请号：US10956502

申请日：2004-10-01

申请人： Frank Dropps ,  Edward Ross ,  Steven Betker

发明人： Frank Dropps ,  Edward Ross ,  Steven Betker

IPC分类号： H04J3/24

CPC分类号： G06F3/0664 ,  G06F3/0605 ,  G06F3/0661 ,  G06F3/0683 ,  G06F12/0813 ,  H04L49/101 ,  H04L49/3009 ,  H04L49/357

摘要： A Fibre Channel switch element in a Fibre Channel network is provided. The Fibre Channel switch element includes a port that replaces a logical unit number (“LUN”) field value in a FCP_CMND frame. The port includes a LUN Mapping cache for replacing the LUN field value in a FCP_CMND frame. The LUN Mapping cache may also generate a value that is added to or subtracted from the LUN field value in the FCP_CMND frame. A control bit is used to activate LUN Mapping cache for mapping LUN values.

公开(公告)号：US20050018676A1

公开(公告)日：2005-01-27

申请号：US10894597

申请日：2004-07-20

申请人： Frank Dropps ,  Edward Ross

发明人： Frank Dropps ,  Edward Ross

IPC分类号： H04L12/56

CPC分类号： H04L49/25 ,  H04L49/357 ,  H04L49/506

摘要： A method and switch element for assigning priority to pseudo virtual lanes (“PVL”) using a fibre channel switch element is provided. The method includes, assigning received R_RDYs based on a PVL distribution scheme; and determining traffic congestion on a PVL if there is no credit available to transfer frames from the PVL. A minimum bandwidth feature is enabled to avoid lower priority PVLs from getting no credit for transmitting frames; and distributing credit and R_RDYs based on frame age bits, wherein a lower priority PVL gets credit if a frame is waiting in the PVL for a longer duration compared to a higher priority PVL. The switch element includes, a PVL module having credit counters for plural PVLs; and a timer that monitors frame traffic for each PVL lane. If a PVL gets congested, then a state machine adjusts priority of R_RDY distribution scheme of other PVLs to transmit frames.

摘要翻译： 提供了一种使用光纤通道开关元件为伪虚拟通道（“PVL”）分配优先级的方法和开关元件。 该方法包括：基于PVL分配方案分配接收的R_RDY; 并且如果没有可用于从PVL传送帧的信用，则确定PVL上的流量拥塞。 启用最小带宽功能，以避免较低优先级的PVL对于发送帧没有信用; 并且基于帧时间比特分配信用和R_RDY，其中如果帧在较高优先级PVL中在PVL中等待较长持续时间，则较低优先级的PVL获得信用。 开关元件包括：具有多个PVL的信用计数器的PVL模块; 以及监视每个PVL通道的帧流量的计时器。 如果PVL拥塞，则状态机调整其他PVL的R_RDY分配方案的优先级来发送帧。