公开(公告)号：US06801953B2

公开(公告)日：2004-10-05

申请号：US10219743

申请日：2002-08-15

申请人： Kevin Jennings ,  John Hickey ,  Edele O'Malley ,  Kam Choi ,  Ray Beechinor

发明人： Kevin Jennings ,  John Hickey ,  Edele O'Malley ,  Kam Choi ,  Ray Beechinor

IPC分类号： G06F1300

CPC分类号： H04L12/46 ,  H04L49/351 ,  H04L69/14

摘要： Trunking or other relationship is defined between ports on different devices in a cascade-connected stack of network devices. When network communications are passed via the cascade connection an indication is included of whether it originated from a port that is part of a trunk and thereby port-mismatch errors can be avoided.

摘要翻译： 在级联连接的网络设备堆栈中的不同设备上的端口之间定义了中继或其他关系。 当通过级联连接传递网络通信时，是否包含起始于作为中继线一部分的端口的指示，从而可以避免端口不匹配错误。

公开(公告)号：US06661790B1

公开(公告)日：2003-12-09

申请号：US09369326

申请日：1999-08-06

申请人： Jerome Nolan ,  Kevin Jennings ,  Kam Choi ,  John Hickey ,  Edele O'Malley

发明人： Jerome Nolan ,  Kevin Jennings ,  Kam Choi ,  John Hickey ,  Edele O'Malley

IPC分类号： H04L1256

CPC分类号： H04L45/742 ,  H04L12/18 ,  H04L12/42

摘要： The present invention is based on a ring architecture wherein each chip in the multiplicity of chips is connected in a chain so that it can receive packets from the next previous chip in the chain and forward packets to the next following chip in the chain, whereby to form a ring. Before a packet is placed on the ring by a device it is provided with a ‘masking’ field which identifies each of the other devices and the ports within any such device to which the packet must be sent in order to achieve a multicast. When a device in its turn receives such a packet it will examine the masking field to determine whether the field identifies that device. If so, the packet, which may be held in temporary storage, may be processed for forwarding from a port of that device. The device will strip from the masking field the identification of the respective device and transmit the packet with a thus modified masking field to the next device in turn. If a packet does not contain any indication of another device in the ring, the packet will not be transmitted and therefore will naturally terminate.

摘要翻译： 本发明基于环形结构，其中多个芯片中的每个芯片以链路连接，使得其可以从链中的下一个先前芯片接收分组，并将分组转发到链中的下一个后续芯片，由此到 形成戒指 在通过设备将数据包放置在环上之前，它被提供有“掩蔽”字段，其标识每个其他设备以及要向其发送分组的任何这样的设备中的端口以实现多播。 当设备反过来接收到这样的分组时，它将检查掩蔽字段以确定该字段是否标识该设备。 如果是这样，则可以处理可以保存在临时存储器中的分组，以从该设备的端口转发。 设备将从掩蔽字段剥离相应设备的标识，并将具有如此修改的掩蔽字段的分组依次传送到下一个设备。 如果一个分组不包含环中另一个设备的任何指示，则该分组将不被传输，因此将自然地终止。

公开(公告)号：US06463479B1

公开(公告)日：2002-10-08

申请号：US09201368

申请日：1998-11-30

申请人： Kevin Jennings ,  John Hickey ,  Edele O'Malley ,  Kam Choi ,  Raymond Beechinor

发明人： Kevin Jennings ,  John Hickey ,  Edele O'Malley ,  Kam Choi ,  Raymond Beechinor

IPC分类号： G06F1300

CPC分类号： H04L12/46 ,  H04L49/351 ,  H04L69/14

摘要： Trunking or other relationship is defined between ports on different devices in a cascade connected stack of network devices. When network communications are passed via the cascade connection an indication is included of whether it originated from a port which is part of a trunk and thereby port-mismatch errors can be avoided.

摘要翻译： 在串联连接的网络设备堆栈中的不同设备上的端口之间定义了中继或其他关系。 当通过级联连接通过网络通信时，包括是否源自作为中继线一部分的端口的指示，从而可以避免端口不匹配错误。

公开(公告)号：US06570848B1

公开(公告)日：2003-05-27

申请号：US09353609

申请日：1999-07-14

申请人： Kevin Loughran ,  Edele O'Malley ,  Kam Choi ,  John Hickey

发明人： Kevin Loughran ,  Edele O'Malley ,  Kam Choi ,  John Hickey

IPC分类号： H04J314

CPC分类号： H04L12/5602 ,  H04L2012/5635 ,  H04L2012/5636 ,  H04Q11/0478

摘要： A network switch including a port for the reception and transmission of data packets, and a receive buffer store connected to the port, detecting a predetermined state of fullness of the buffer store, initiating in response to the state of fullness the production of control frames for signaling to a source of packets to pause the sending of packets to the switch, counting said frames to obtain a measure of congestion of the switch, and responsive to a rate of change of measure to enable the discarding of packets received by the buffer when rate is higher than a first predetermined value and to disable the discarding of packets when the rate of change of the measure is below a second predetermined value.

摘要翻译： 包括用于接收和传输数据分组的端口的网络交换机和连接到该端口的接收缓冲存储器，检测缓冲存储器的预定充满状态，响应于丰满的状态启动控制帧的产生 信令到分组源，以暂停向分组发送分组，对所述帧进行计数以获得交换机的拥塞度量，并且响应于测量的改变速率，以便能够丢弃由缓冲器接收到的分组的速率 高于第一预定值，并且当所述测量的改变速率低于第二预定值时禁用所述分组的丢弃。

公开(公告)号：US06438129B1

公开(公告)日：2002-08-20

申请号：US09253771

申请日：1999-02-22

申请人： Kevin Jennings ,  Edele O'Malley ,  John Hickey

发明人： Kevin Jennings ,  Edele O'Malley ,  John Hickey

IPC分类号： H04J324

CPC分类号： H04L45/00 ,  H04L29/12009 ,  H04L45/54 ,  H04L49/25 ,  H04L49/351 ,  H04L49/354 ,  H04L61/00

摘要： A forwarding database in a network switch is established and maintained by performing a look-up for a source address read from an incoming frame to find a match between the source address in the frame and the source address in an entry which includes that source address, a port number and an age field. New entries are made if matches are not found, so that the forwarding database facilitates the dispatch of frames to destination addresses corresponding to source addresses in the table. The performance of a source address look-up is inhibited in the absence of a token, a reservoir of tokens being decremented each time a source address look-up is performed and incremented from time to time, at a selectable rate. The process facilitates the performance of a destination address look-up for every received frame by restricting the bandwidth made available for source address look-ups.

摘要翻译： 通过执行从输入帧读取的源地址的查找来查找网络交换机中的转发数据库，​​以在包含该源地址的条目中找到帧中的源地址与源地址之间的匹配， 一个港口号码和一个年龄域。 如果未找到匹配项，则创建新条目，以便转发数据库便于将帧分派到与表中的源地址对应的目标地址。 在没有令牌的情况下，源地址查找的性能被禁止，每次执行源地址查找并随时递增令牌的存储器以可选择的速率递减。 该过程通过限制可用于源地址查找的带宽来促进对每个接收到的帧的目的地地址查找的性能。

公开(公告)号：US06529507B1

公开(公告)日：2003-03-04

申请号：US09253772

申请日：1999-02-22

申请人： Edele O'Malley ,  Kevin Jennings ,  John Hickey

发明人： Edele O'Malley ,  Kevin Jennings ,  John Hickey

IPC分类号： H04J324

CPC分类号： H04L45/742 ,  H04L49/351 ,  H04L49/354

摘要： A forwarding database in a network switch is established and maintained by performing a look-up for a source address read from an incoming frame to find a match between the source address in the frame and the source address in an entry which includes that source address, a port number and an age field. New entries are made if matches are not found, so that the forwarding database facilitates the dispatch of frames to destination addresses corresponding to source addresses in the table. The switch maintains a system age, such as a two-bit field, which is changed from time to time and the current system age is entered in the table as the age field when a source address entry is made. When said source address is found by a look-up process, it is updated with the current system age only if the age field of the entry and the current system age do not correspond. There is a saving of bandwidth arising from the avoidance of write cycles when an age field of an entry corresponds to the current system age.

摘要翻译： 通过执行从输入帧读取的源地址的查找来查找网络交换机中的转发数据库，​​以在包含该源地址的条目中找到帧中的源地址与源地址之间的匹配， 一个港口号码和一个年龄域。 如果未找到匹配项，则创建新条目，以便转发数据库便于将帧分派到与表中的源地址对应的目标地址。 交换机维护系统时代，例如两位字段，当进行源地址表项时，它将不时更改，并将当前系统时间作为年龄字段输入表中。 当通过查找过程找到所述源地址时，仅当条目的年龄字段和当前系统时间不对应时才更新当前系统时间。 当条目的年龄字段对应于当前系统时代时，避免了写周期产生的带宽的节省。

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：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：US08081630B2

公开(公告)日：2011-12-20

申请号：US11121192

申请日：2005-05-03

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

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

IPC分类号： H04L12/56

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。