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1. 发明授权

US06801953B2 Trunking in stacked communication devices 有权
标题翻译：在堆叠通信设备中进行中继
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。

2. 发明授权

US06661790B1 Packet multicasting in a ring architecture 有权
标题翻译：环形架构中的分组多播
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。

3. 发明授权

US06463479B1 Apparatus for trunking in stacked communication devices 有权
标题翻译：用于堆叠通信设备中的设备
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。

4. 发明授权

US06438129B1 Restriction of source address look-ups in network 失效
标题翻译：限制网络中的源地址查找
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。

5. 发明授权

US06529507B1 Restriction of source address up-dating in network switches 失效
标题翻译：网络交换机中源地址更新的限制
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。

6. 发明授权

US06580712B1 System for controlling look-ups in a data table in a network switch 失效
标题翻译：用于控制网络交换机中数据表查找的系统
公开(公告)号：US06580712B1
公开(公告)日：2003-06-17
申请号：US09415235
申请日：1999-10-12
申请人： Kevin Jennings , Christopher Hay , Edele O'Malley , Gareth E Allwright
发明人： Kevin Jennings , Christopher Hay , Edele O'Malley , Gareth E Allwright
IPC分类号： H04L1256
CPC分类号： H04L49/254 , H04L45/745 , H04L49/3009
摘要： A system including an ordered data table containing linked lists of MAC addresses has a multiplicity of search engines which have their access to an LRU engine under the control of a token which is passed from one search engine to the next when the LRU engine has completed reordering the table after an address look-up. The system avoids conflicts between searching and reordering and allows reordering to be performed at a controlled rate.
摘要翻译：包括含有MAC地址的链接列表的有序数据表的系统具有多个搜索引擎，它们在LRU引擎已经完成重排序的情况下，在令牌的控制下访问LRU引擎，该令牌从一个搜索引擎传递到下一个搜索引擎表后地址查找。该系统避免了搜索和重新排序之间的冲突，并允许以受控的速率执行重新排序。

7. 发明授权

US06804230B1 Communication device with forwarding database having a trie search facility 失效
标题翻译：具有转发数据库的通信设备具有特里搜索设备
公开(公告)号：US06804230B1
公开(公告)日：2004-10-12
申请号：US09432591
申请日：1999-11-03
申请人： Kevin Jennings , Edele O'Malley , Sorcha O'Callaghan , Kevin Loughran
发明人： Kevin Jennings , Edele O'Malley , Sorcha O'Callaghan , Kevin Loughran
IPC分类号： G06F1730
CPC分类号： H04L45/00 , H04L45/7453 , H04L49/3009 , H04L49/309 , H04Q11/0478 , Y10S707/99933
摘要： A communication device which includes a hardware trie search facility. At least part of a memory is divided into memory blocks, each of said blocks consisting of a multiplicity of locations, at least some of said locations each providing when accessed a pointer to another block and an indication of the size of the block. A shift register holds an address key, and a trie block is accessed using an address composed of a number of bits related to said indication of the size of the block. The key is shifted by said number of bits prior to a subsequent stage of the search. Part of the memory comprises an associated data table which includes entries of data enabling a packet to be forwarded and at least some locations in said blocks provide when accessed a pointer to an entry in the associated data table.
摘要翻译：一种包括硬件特里搜索设备的通信设备。存储器的至少一部分被分成存储器块，每个所述块由多个位置组成，当访问指向另一个块的指针时，至少一些所述位置中的每个提供，并且指示块的大小。移位寄存器保存地址密钥，并且使用由与块的大小的所述指示相关的多个位组成的地址访问特里块。密钥在搜索的后续阶段之前移位所述比特数。存储器的一部分包括相关联的数据表，其包括能够转发分组的数据的条目，并且当访问到所述相关联的数据表中的条目的指针时，所述块中的至少一些位置提供。

8. 发明授权

US06425015B1 Stacked communication devices and method for port mirroring using modified protocol 失效
标题翻译：使用修改协议的堆叠通信设备和端口镜像方法
公开(公告)号：US06425015B1
公开(公告)日：2002-07-23
申请号：US09201345
申请日：1998-11-30
申请人： Kevin Jennings , Eugene O'Neil , Edele O'Malley , Raymond Beechinor
发明人： Kevin Jennings , Eugene O'Neil , Edele O'Malley , Raymond Beechinor
IPC分类号： G06F1517
CPC分类号： H04L43/00
摘要： Port mirroring is achieved between ports on separate devices in a stack of communication devices by establishing a protocol for communications within a cascade connection forming the stack in which an indication is given of whether the communication is being sent to the mirror port in addition to its intended destination. This avoids increasing the volume of traffic in the cascade connection as would be the case if the original and mirror copy were sent separately.
摘要翻译：在通信设备的堆叠中的单独设备上的端口之间实现端口镜像，通过建立用于形成堆栈的级联连接中的通信协议，其中给出除了其预期之外是否将通信发送到镜像端口的指示目的地。这样可以避免增加级联连接中的流量，就像分开发送原始和镜像副本的情况一样。

9. 发明授权

US06570848B1 System and method for congestion control in packet-based communication networks 有权
标题翻译：基于分组的通信网络拥塞控制的系统和方法
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。

10. 发明申请

US20120314564A1 CASCADE SYSTEM FOR NETWORK UNITS 有权
标题翻译：网络单元的CASCADE系统
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。

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