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1. 发明授权

US08213420B2 Cascade system for network units 有权
标题翻译：级联系统为网络单元
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。

2. 发明授权

US07289496B2 Cascade system for network units 有权
标题翻译：级联系统为网络单元
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。

3. 发明授权

US08879444B2 Cascade system for network units 有权
标题翻译：级联系统为网络单元
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。

4. 发明授权

US07167441B2 Cascade control system for network units 有权
标题翻译：网络单元级联控制系统
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。

5. 发明授权

US07403484B2 Switching fabrics and control protocols for them 有权
标题翻译：为他们交换结构和控制协议
公开(公告)号：US07403484B2
公开(公告)日：2008-07-22
申请号：US10751930
申请日：2004-01-07
申请人： Maurice A Goodfellow , Paul J Moran , John P Stubley , Alan E Ainsworth
发明人： Maurice A Goodfellow , Paul J Moran , John P Stubley , Alan E Ainsworth
IPC分类号： G01R31/08
CPC分类号： H04L45/12 , H04L45/28 , H04L45/32 , H04L49/10 , H04L49/65
摘要： A network unit for use in a switching fabric stores for each network unit in the switching fabric a respective change identification number. In each unit this number is incremented on each change of state. The unit broadcasts protocol packets which indicates incremented change identification numbers; receives corresponding packets from the other units; and determines when the last change identification numbers in the table are the same for all the units. This allows a control based on whether all the units know that all the other units have been updated in response to all the changes of state in the fabric. The network unit can also participate in a routing algorithm, and particularly a shortest path algorithm, within a fabric that constitutes a single network entity.
摘要翻译：用于交换结构的网络单元为交换结构中的每个网络单元存储相应的改变标识号。在每个单位中，这个数字在每次状态变化时递增。单位广播协议报文，表示增量变化识别号码; 从其他单位接收相应的数据包; 并确定表中的最后一个更改标识号在所有单元中是否相同。这允许基于所有单元是否知道所有其他单元已经被更新以响应于结构中的状态的所有改变而进行的控制。网络单元还可以参与构成单个网络实体的结构内的路由算法，特别是最短路径算法。

6. 发明授权

US06999452B1 Ethernet units adapted for loop configuration and method of operating same 失效
标题翻译：适用于回路配置的以太网单元及其操作方法
公开(公告)号：US06999452B1
公开(公告)日：2006-02-14
申请号：US09511118
申请日：2000-02-23
申请人： Justin A Drummond-Murray , Paul J Moran
发明人： Justin A Drummond-Murray , Paul J Moran
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L12/42 , H04L49/201 , H04L49/351 , H04L49/354
摘要： A packet-switched network system comprises a multiplicity of multi-port network units each of which has first and second ports and other ports and transmission links coupling the first and second ports of said unit in a closed ring. The first and second ports and transmission links support duplex transmission of Ethernet data packets. Each unit transmits from said first and second ports packets including selected information enabling on reception of a packet at any of the units a determination of a number of hops from unit to unit around said ring said packet has made. Each unit has a forwarding database and in response to the said selected information controls the transmission of said packets in two directions around said ring, and each unit causes discard of packets which have according to said selected information circumnavigated the ring.
摘要翻译：分组交换网络系统包括多个多端口网络单元，每个多端口网络单元具有第一和第二端口以及以闭环形式将所述单元的第一和第二端口耦合的其它端口和传输链路。第一和第二端口和传输链路支持以太网数据包的双工传输。每个单元从所述第一和第二端口发送包括所选择的信息的分组，所述信息使得能够在任何单元上接收到分组的分组，所述分组在所述分组已经做出的所述环周围的单元到单元的跳数的确定。每个单元具有转发数据库，并且响应于所述选择的信息控制所述分组在所述环周围的两个方向的传输，并且每个单元导致根据所述选择的信息循环环的分组丢弃。

7. 发明授权

US07233601B1 Cascade architecture and operation for packet-based communication systems 有权
标题翻译：级联架构和基于分组通信系统的操作
公开(公告)号：US07233601B1
公开(公告)日：2007-06-19
申请号：US09662158
申请日：2000-09-14
申请人： Alan R. Poulter , Quang T Tran , Sharon L Wiles , David J Law , Paul J Moran , Christopher A Walker
发明人： Alan R. Poulter , Quang T Tran , Sharon L Wiles , David J Law , Paul J Moran , Christopher A Walker
IPC分类号： H04L12/40
CPC分类号： H04L49/351 , H04L12/44
摘要： A connecting unit for use in a system comprising a ‘stack’ of network communication units having a cascade connection has three ports having lines for forwarding and receiving data packets and for forwarding and receiving control messages. The connecting unit increments a first signal value defining an identification number received by way of a control message at a first port, provides the received signal value by way of a control message to the third port and provides the incremented signal value by way of a control message to the second port. The connecting unit also receives a second signal value defining an active unit count by way of a control message at the first port and provides the second signal value, incremented or not in dependence on a control message received at the third port, in a control message at the second port. The first signal values (UnitIDs) are used to establish the numbering of the units in the stack and the second signal values are used to compute a count of the ‘active’ units in the stack.
摘要翻译：用于包括具有级联连接的网络通信单元的“堆叠”的系统的连接单元具有三个端口，其具有用于转发和接收数据分组以及用于转发和接收控制消息的线路。连接单元增加定义通过第一端口处的控制消息接收的标识号的第一信号值，并通过控制消息将接收到的信号值提供给第三端口，并通过控制提供增加的信号值消息到第二个端口。连接单元还通过第一端口处的控制消息接收定义有效单元计数的第二信号值，并且在控制消息中提供依赖于在第三端口接收的控制消息而增加或不增加的第二信号值在第二个港口第一个信号值（UnitID）用于建立堆栈中单元的编号，第二个信号值用于计算堆栈中“活动”单元的计数。

8. 发明授权

US06807182B1 Stacked network devices including a protocol engine and distributed trunk ports and method of operating same 失效
标题翻译：堆叠网络设备包括协议引擎和分布式中继端口以及操作方法
公开(公告)号：US06807182B1
公开(公告)日：2004-10-19
申请号：US09494399
申请日：2000-01-31
申请人： Clive Dolphin , Graeme J McKerrell , Paul J Moran , Maurice Goodfellow
发明人： Clive Dolphin , Graeme J McKerrell , Paul J Moran , Maurice Goodfellow
IPC分类号： H04L1246
CPC分类号： H04L45/00 , H04L45/245 , H04L45/583 , Y02D50/30
摘要： A trunk connection to a stack of network switches is coupled to physical ports distributed among the switches. A switch has an internal logical port for a protocol engine. A packet received by way of the trunk at a port on a switch which does not host the protocol engine is sent over a cascade connection to the host switch with a tag that is interpreted within the host switch as if the packet cam from the logical port. The tagging and interpretation distinguishes between packets which might or might not be intended for the protocol engine and did not arrive by way of the trunk from packets which are intended for the protocol engine and have been received by way of the trunk.
摘要翻译：到一堆网络交换机的中继连接耦合到分布在交换机之间的物理端口。交换机具有用于协议引擎的内部逻辑端口。在主机交换机上解释的标签通过级联连接发送到交换机上不通过协议引擎的交换机端口上的中继分组，如同从逻辑端口。标记和解释区分可能或可能不是为协议引擎而不是通过中继线通过协议引擎并且已经通过中继线接收的分组来到达的分组。

9. 发明授权

US06785286B1 Port mirroring across a trunked stack of multi-port communication devices 有权
标题翻译：端口镜像跨多个多端口通信设备的集群堆栈
公开(公告)号：US06785286B1
公开(公告)日：2004-08-31
申请号：US09369324
申请日：1999-08-06
申请人： Daniel M O'Keeffe , David J Law , Paul J Moran , Neil J Clifford
发明人： Daniel M O'Keeffe , David J Law , Paul J Moran , Neil J Clifford
IPC分类号： H04L1228
CPC分类号： H04L43/00 , H04L43/12 , H04L45/245 , H04L45/583 , H04L49/351 , Y02D50/30
摘要： A stackable multi-port communication device for a packet-based data communication system, having a multiplicity of physical ports for the reception and dispatch of data in the form of packets, includes switch logic for selecting for a packet at least one destination selected from a multiplicity of ports which include a logical port common to a specified group of said physical ports. A cascade trunk logic, coupled to the switch logic, is used for determining, for the dispatch of a packet directed to said logical port, a selected port of said group of said physical ports; and a remote monitoring logic is used for forwarding a copy of the packet. The remote monitoring logic stores an indication of all the physical ports on the unit from which the copy may be forwarded by the remote monitoring logic and prevents the forwarding of the copy of the packet to any physical port which corresponds to the port selected by the cascade logic for the dispatch of said packet, whereby a packet which is forwarded from any of the specified group of physical ports is not duplicated by the remote monitoring logic.
摘要翻译：一种用于基于分组的数据通信系统的可堆叠多端口通信设备，具有用于以分组形式接收和分发数据的多个物理端口，包括用于从至少一个目的地选择分组的切换逻辑，包含多个所述物理端口的特定组的通用逻辑端口。耦合到交换机逻辑的级联干线逻辑被用于确定针对所述逻辑端口的分组的分配所述物理端口组的选定端口; 并且使用远程监视逻辑来转发分组的副本。远程监视逻辑存储由远程监控逻辑可以从其转发副本的单元上的所有物理端口的指示，并且防止将数据包的副本转发到对应于由级联选择的端口的任何物理端口用于分发所述分组的逻辑，由此从所述指定的物理端口组中的任何一个转发的分组不被远程监视逻辑复制。

10. 发明授权

US06594270B1 Ageing of data packets using queue pointers 失效
标题翻译：使用队列指针老化数据包
公开(公告)号：US06594270B1
公开(公告)日：2003-07-15
申请号：US09353148
申请日：1999-07-14
申请人： Justin A Drummond-Murray , Robin Parry , David J Law , Paul J Moran
发明人： Justin A Drummond-Murray , Robin Parry , David J Law , Paul J Moran
IPC分类号： H04L1266
CPC分类号： H04Q11/0478 , H04L2012/5681
摘要： A packet memory system including a memory space having a multiplicity of addressable memory locations for the storage of data packets, pointer control means for generating a write pointer which progressively defines where data is to be written to the memory space and a read pointer which progressively defines where data is to be read from the memory space and an ageing clock which defines a succession of intervals. The pointer control means generates a ‘current’ pointer and a ‘discard’ pointer and for each interval is operative to cause the ‘current’ pointer to correspond to an immediately previous value of the write pointer and to cause the discard pointer to correspond to an immediately previous value of the said current pointer. In this manner the portion of the memory space between the ‘discard’ pointer and the read pointer denotes data which has been in said memory space for at least two of said intervals. The system thereby defines ageing by means of pointers and avoids the ambiguities or inconvenience of known recycling ageing schemes.
摘要翻译：一种分组存储器系统，包括具有用于存储数据分组的多个可寻址存储器位置的存储器空间，指针控制装置，用于生成逐渐定义将数据写入存储器空间的写指针，以及逐渐定义的读指针其中要从存储器空间读取数据和定义一连串间隔的老化时钟。指针控制装置产生一个“当前”指针和一个“丢弃”指针，并且对于每个间隔，操作使“当前”指针对应于写指针的紧前一个值，并使丢弃指针对应于以这种方式，“丢弃”指针和读取指针之间的存储器空间的部分表示在所述存储器空间中对于所述间隔中的至少两个的数据。因此，该系统通过指针来定义老化，并避免已知的再循环老化方案的模糊或不方便。

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