公开(公告)号：US07420968B2

公开(公告)日：2008-09-02

申请号：US10456702

申请日：2003-06-06

申请人： Bryan J. Donoghue ,  Richard A. Gahan ,  Kam Choi ,  Edele O'Malley ,  Eugene O'Neill

发明人： Bryan J. Donoghue ,  Richard A. Gahan ,  Kam Choi ,  Edele O'Malley ,  Eugene O'Neill

IPC分类号： H04L12/50 ,  H04Q11/00

CPC分类号： H04L49/1515

摘要： A system of switch modules contains input demultiplexers connected to ports on each of the modules and output multiplexers connected to each of the modules. Each module has output and input interfaces for mesh links and at least one output interface is looped back to an input interface on the same module. The arrangement reduces module-to-module traffic and corresponding increases the transmit bandwidth of a module.

摘要翻译： 开关模块的系统包括连接到每个模块上的端口的输入解复用器和连接到每个模块的输出多路复用器。 每个模块都具有用于网格链接的输出和输入接口，并且至少一个输出接口循环回相同模块上的输入接口。 该装置减少了模块到模块的流量，并且相应地增加了模块的传输带宽。

公开(公告)号：US08213420B2

公开(公告)日：2012-07-03

申请号：US11857512

申请日：2007-09-19

申请人： Bryan J Donoghue ,  Quang T Tran ,  Eugene O'Neill ,  David J Law ,  Paul J Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maunte A Goodfellow

发明人： Bryan J Donoghue ,  Quang T Tran ,  Eugene O'Neill ,  David J Law ,  Paul J Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maunte A Goodfellow

IPC分类号： H04L12/50

CPC分类号： H04L12/433

摘要： A network stack includes a plurality of network units each of which includes a multiplicity of ports for receiving and forwarding addressed data packets, at least two cascade ports and a switching engine for forwarding received packets to at least one port in accordance with address data in the packets and a cascade connection including, for each of two opposite directions around the stack, at least one unidirectional path for data packets composed of links each between a respective cascade port on a network unit and a corresponding cascade port on the next network unit.

摘要翻译： 网络堆栈包括多个网络单元，每个网络单元包括用于接收和转发寻址的数据分组的多个端口，至少两个级联端口和用于根据所述数据分组中的地址数据将接收的分组转发到至少一个端口的交换引擎 分组和级联连接包括针对堆叠周围的两个相反方向中的每一个，至少一个用于由网络单元上的相应级联端口和下一个网络单元上的对应级联端口之间的链路组成的数据分组的单向路径。

公开(公告)号：US20120314564A1

公开(公告)日：2012-12-13

申请号：US13526251

申请日：2012-06-18

申请人： Bryan J. DONOGHUE ,  Quang T. Tran ,  Eugene O'Neill ,  David J. Law ,  Paul J. Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maurice A. Goodfellow

发明人： Bryan J. DONOGHUE ,  Quang T. Tran ,  Eugene O'Neill ,  David J. Law ,  Paul J. Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maurice A. Goodfellow

IPC分类号： H04L12/24 ,  H04L12/56

CPC分类号： H04L12/433

摘要： In one embodiment, a method is described for detecting an operational failure between the network unit and an adjacent network unit in the stack; controlling the switching engine to redirect packets which would otherwise be sent from a particular port to the adjacent network unit to be forwarded from another port to be sent to a different network unit in the stack; and entering the switching engine into a bypass mode in response to control data indicating an operational failure between at least two other network units in the stack to cause packets to be forwarded without being re-directed by the switching engine.

摘要翻译： 在一个实施例中，描述了一种用于检测网络单元和堆叠中的相邻网络单元之间的操作故障的方法; 控制交换引擎将否则将从特定端口发送到相邻网络单元的分组，以从要发送到堆栈中的不同网络单元的另一端口转发; 以及响应于指示所述堆叠中的至少两个其他网络单元之间的操作故障的控制数据，将所述交换引擎进入旁路模式，以使转发引擎不重新引导分组。

公开(公告)号：US08879444B2

公开(公告)日：2014-11-04

申请号：US13526251

申请日：2012-06-18

申请人： Bryan J Donoghue ,  Quang T Tran ,  Eugene O'Neill ,  David J Law ,  Paul J Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maurice A Goodfellow

发明人： Bryan J Donoghue ,  Quang T Tran ,  Eugene O'Neill ,  David J Law ,  Paul J Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maurice A Goodfellow

IPC分类号： H04B7/00 ,  H04L12/433

CPC分类号： H04L12/433

摘要： In one embodiment, a method is described for detecting an operational failure between the network unit and an adjacent network unit in the stack; controlling the switching engine to redirect packets which would otherwise be sent from a particular port to the adjacent network unit to be forwarded from another port to be sent to a different network unit in the stack; and entering the switching engine into a bypass mode in response to control data indicating an operational failure between at least two other network units in the stack to cause packets to be forwarded without being re-directed by the switching engine.

摘要翻译： 在一个实施例中，描述了一种用于检测网络单元和堆叠中的相邻网络单元之间的操作故障的方法; 控制交换引擎将否则将从特定端口发送到相邻网络单元的分组，以从要发送到堆栈中的不同网络单元的另一端口转发; 以及响应于指示所述堆叠中的至少两个其他网络单元之间的操作故障的控制数据，将所述交换引擎进入旁路模式，以使转发引擎不重新引导分组。

公开(公告)号：US07167441B2

公开(公告)日：2007-01-23

申请号：US10067965

申请日：2002-02-08

申请人： Bryan J Donoghue ,  Eugene O'Neill ,  Edele O'Malley ,  Paul J Moran ,  Kam Choi ,  Jerome Nolan

发明人： Bryan J Donoghue ,  Eugene O'Neill ,  Edele O'Malley ,  Paul J Moran ,  Kam Choi ,  Jerome Nolan

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04J3/00

CPC分类号： H04L12/433

摘要： Cascade control logic for use in a switch or other network unit that can be used in a cascaded stack can maintain normally a point-to-point half-duplex connection for control data with each of the next preceding and next succeeding units in the cascade. Each cascade logic device is organised so that for one direction, conveniently called the up direction, a device is a master and in the other direction the device is a slave in respect of the control path. A control device will generate master control frames in the up direction and deliver slave control frames in the down direction. The control device is organised so that in the absence of reception of valid control frames on a control link control data which would otherwise be sent out on that link is looped back within the control device. In this manner the control device can maintain under normal circumstances two virtual control channels which can ‘self-heal’ notwithstanding the failure or powering-down of a unit in the cascade.Status information represented by the control frames can be used to control a switching engine to provide self healing of the data path in the cascade.

摘要翻译： 用于在级联堆叠中使用的交换机或其他网络单元中的级联控制逻辑可以正常地维护级联中的下一个前一个和后续单元中的每一个的控制数据的点对点半双工连接。 每个级联逻辑器件被组织成使得对于一个方向，方便地称为向上方向，器件是主器件，并且在另一方向上，器件是关于控制路径的从器件。 控制装置将沿向上方向产生主控制帧，并向下传送从控制帧。 控制装置被组织成使得在没有接收到控制链路上的有效控制帧的情况下，否则将在该链路上发送的控制数据环回到控制装置内。 以这种方式，控制装置可以在正常情况下维持两个虚拟控制通道，即使在级联中的单元发生故障或断电，它们也可“自愈”。 由控制帧表示的状态信息可用于控制切换引擎以提供级联中的数据路径的自愈。

公开(公告)号：US07289496B2

公开(公告)日：2007-10-30

申请号：US10067738

申请日：2002-02-08

申请人： Bryan J Donoghue ,  Quang T Tran ,  Eugene O'Neill ,  David J Law ,  Paul J Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maurice A Goodfellow

发明人： Bryan J Donoghue ,  Quang T Tran ,  Eugene O'Neill ,  David J Law ,  Paul J Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maurice A Goodfellow

IPC分类号： H04L12/50

CPC分类号： H04L12/433

摘要： Network units such as switches for use in a cascaded stack are organised to provide a cascade connection in the form of a dual unidirectional connection so that, in its ordinary configuration, there is at least one and preferably more than one unidirectional ring for each direction around the cascade, each ring including a respective port on each unit. For each ring, each port on a unit is connected by a respective link to a corresponding port on the preceding unit and the following unit. The units provide a self-healing operation in the event of various kinds of operational failure. The self-healing operation includes loop-back of packets in units adjacent the failure and bypass of a packet switching process for other units. The units include control logic for passing control frames containing status information relating to the units and links between them and for co-operation with a CPU to control a switching engine to perform the self-healing operation in accordance with that status information. The units forward on the cascade packets with headers that identify a destination port and the unit on which that port is located and also indicate which units have and have not been traversed by a packet.

摘要翻译： 网络单元（例如用于级联堆叠中的开关）被组织以提供双向单向连接形式的级联连接，使得在其普通配置中，每个方向周围存在至少一个并且优选地多于一个单向环 级联，每个环包括每个单元上的相应端口。 对于每个环，单元上的每个端口通过相应的链路连接到前一单元上的相应端口和随后的单元。 在各种操作故障的情况下，这些单元提供自愈操作。 自修复操作包括以故障为单位的分组的环回，并且对其他单元进行分组交换过程的旁路。 这些单元包括控制逻辑，用于传递包含与它们之间的单元和链接相关的状态信息的控制帧，并且用于与CPU协作以控制切换引擎以根据该状态信息执行自愈操作。 单元在级联数据包上转发标识目的端口和该端口所在单元的报头，并指示哪些单元已经和没有被数据包遍历。

公开(公告)号：US07522589B2

公开(公告)日：2009-04-21

申请号：US10337299

申请日：2003-01-07

申请人： Eugene O'Neill ,  Kam Choi ,  Edele O'Malley ,  Maurice A Goodfellow

发明人： Eugene O'Neill ,  Kam Choi ,  Edele O'Malley ,  Maurice A Goodfellow

IPC分类号： H04L12/28

CPC分类号： H04L45/02 ,  H04L45/26 ,  H04L45/742 ,  H04L49/201 ,  H04L49/30 ,  H04L49/3009 ,  H04L49/351

摘要： A multi-port network unit for use in a cascade system of network units sends from a cascade port a packet including a special header having a source port ID, a destination port ID and a ‘destination port known’ field. The port IDs identify both a unit and a port within a unit. A routing database is set up, optionally by a discovery protocol, in terms of ports and either destination units (within the cascade) or source units (within the cascade). The database includes a mesh table, indicating from which cascade port a packet with a known destination port ID should be forwarded, without needing a fresh look-up. The database also includes a multicast exclusion table which allows ingress of packets with source unit IDs matched to an ingress port. The scheme allows a general mesh type of cascade while dynamically preventing closed loops.

摘要翻译： 用于网络级联系统的多端口网络单元从级联端口发送包括具有源端口ID，目的端口ID和“目的端口已知”字段的特殊报头的分组。 端口ID标识单元中的单元和端口。 根据端口和目标单元（级联）或源单元（级联内），路由数据库可选地由发现协议来设置。 数据库包括网格表，指示哪个级联端口具有应该转发具有已知目的地端口ID的分组，而不需要新的查找。 该数据库还包括一个组播排除表，允许进入与进入端口匹配的源单元ID的数据包。 该方案允许一般网格类型的级联，同时动态地防止闭环。

公开(公告)号：US20080037531A1

公开(公告)日：2008-02-14

申请号：US11857512

申请日：2007-09-19

申请人： Bryan Donoghue ,  Quang Tran ,  Eugene O'Neill ,  David Law ,  Paul Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maunte Goodfellow

发明人： Bryan Donoghue ,  Quang Tran ,  Eugene O'Neill ,  David Law ,  Paul Moran ,  Edele O'Malley ,  Jerome Nolan ,  Kam Choi ,  Maunte Goodfellow

IPC分类号： H04L12/50

CPC分类号： H04L12/433

摘要： A network stack includes a plurality of network units each of which includes a multiplicity of ports for receiving and forwarding addressed data packets, at least two cascade ports and a switching engine for forwarding received packets to at least one port in accordance with address data in the packets and a cascade connection including, for each of two opposite directions around the stack, at least one unidirectional path for data packets composed of links each between a respective cascade port on a network unit and a corresponding cascade port on the next network unit.

摘要翻译： 网络堆栈包括多个网络单元，每个网络单元包括用于接收和转发寻址的数据分组的多个端口，至少两个级联端口和用于根据所述数据分组中的地址数据将接收的分组转发到至少一个端口的交换引擎 分组和级联连接包括针对堆叠周围的两个相反方向中的每一个，至少一个用于由网络单元上的相应级联端口和下一个网络单元上的对应级联端口之间的链路组成的数据分组的单向路径。

公开(公告)号：US20060203816A1

公开(公告)日：2006-09-14

申请号：US11121192

申请日：2005-05-03

申请人： Edele O'Malley ,  Eugene O'Neill ,  Kam Choi ,  Daniel O'Keeffe

发明人： Edele O'Malley ,  Eugene O'Neill ,  Kam Choi ,  Daniel O'Keeffe

IPC分类号： H04L12/56 ,  H04L12/54

CPC分类号： H04L63/1408 ,  H04L49/3009 ,  H04L49/354 ,  H04L49/355 ,  H04L2012/5687

摘要： A cascade system of network units includes forwarding units which have external ports, a communication fabric connecting the units and at least one processing unit which needs no forwarding database. The processing unit may perform a security operation such as intrusion prevention or encryption. Each forwarding unit on receipt of a packet performs a look-up to determine an egress port, to determine whether the packet must be diverted to a processing unit, to provide the packet with a first forwarding instruction identifying the egress port uniquely within the system and a second forwarding instruction identifying a diversion port by which the packet can reach the processing unit and to set an order field which determines which of the forwarding instructions shall be performed first. The processing unit is operative on receipt of the packet by way of the diversion port to change the order field to specify that the packet should now be sent to the egress port.

摘要翻译： 网络单元的级联系统包括具有外部端口的转发单元，连接单元的通信结构以及不需要转发数据库的至少一个处理单元。 处理单元可以执行诸如入侵防御或加密的安全操作。 每个转发单元在接收到分组时执行查找以确定出口端口，以确定分组是否必须被转移到处理单元，以向分组提供识别系统内唯一的出口端口的第一转发指令，以及 识别分组可以到达处理单元的转移端口的第二转发指令，以及设置首先执行哪个转发指令的顺序字段。 处理单元通过转移端口接收到分组，以改变订单字段以指定该分组现在应该被发送到出口端口。

公开(公告)号：US07362750B2

公开(公告)日：2008-04-22

申请号：US10464292

申请日：2003-06-17

申请人： Kam Choi ,  Eugene O'Neill ,  Edele O'Malley

发明人： Kam Choi ,  Eugene O'Neill ,  Edele O'Malley

IPC分类号： H04Q11/06

CPC分类号： H04L45/742 ,  H04L49/15 ,  H04L49/30

摘要： A switching module has external ports for sending and receiving data packets and mesh interfaces for internal mesh connections with other modules. A switching engine directs packets to one or other of the mesh interfaces according to the port number of a ‘destination’ or egress port on another module, as determined by a lookup. The port numbers are programmable so that the distribution of traffic through the mesh connections can be modified.

摘要翻译： 交换模块具有用于发送和接收数据包和网格接口的外部端口，用于与其他模块的内部网格连接。 交换引擎根据查找确定的根据另一个模块上的“目的地”或出口端口的端口号将数据包引导到一个或多个网格接口。 端口号是可编程的，以便可以修改通过网状连接的流量分配。