公开(公告)号：US06980550B1

公开(公告)日：2005-12-27

申请号：US09761281

申请日：2001-01-16

申请人： Michael Yip ,  Desikan Saravanan ,  Arthur Lin ,  Edward Joel Rovner ,  Tash Hepting ,  Paul Anderson ,  Brian Bailey

发明人： Michael Yip ,  Desikan Saravanan ,  Arthur Lin ,  Edward Joel Rovner ,  Tash Hepting ,  Paul Anderson ,  Brian Bailey

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08 ,  H04L29/12

CPC分类号： H04L29/06 ,  H04L29/12009 ,  H04L29/12783 ,  H04L45/02 ,  H04L45/54 ,  H04L45/745 ,  H04L61/35 ,  H04L67/1002 ,  H04L67/1023 ,  H04L69/22

摘要： A method for forwarding data packets to one of a plurality of servers comprising receiving a data packet from a source, at a data packet forwarding device having a plurality of ports, performing a hashing function using a unique component of the data packet as a seed value for the hash, generating a hash value using the hashing function, looking up a table for an address of one of the plurality of servers using the hashed value as an index to the table, and forwarding the data packet to a server corresponding to the address.

摘要翻译： 一种用于将数据分组转发到多个服务器中的一个服务器的方法，包括在具有多个端口的数据分组转发设备处从源接收数据分组，使用数据分组的唯一分量作为种子值执行散列函数 对于散列，使用散列函数生成散列值，使用散列值作为表的索引查找多个服务器之一的地址的表，并将数据分组转发到与该地址对应的服务器 。

公开(公告)号：US06324163B1

公开(公告)日：2001-11-27

申请号：US08977641

申请日：1997-11-24

申请人： Cedell Adam Alexander, Jr. ,  Jim P. Ervin ,  Edward Joel Rovner ,  Matthew Blaze Squire ,  Mark Alan Tippens

发明人： Cedell Adam Alexander, Jr. ,  Jim P. Ervin ,  Edward Joel Rovner ,  Matthew Blaze Squire ,  Mark Alan Tippens

IPC分类号： H04L1228

CPC分类号： H04Q11/0478 ,  H04L2012/5617 ,  H04L2012/563 ,  H04L2012/5632

摘要： A method of alleviating network congestion in an emulated Local Area Network (ELAN) within an Asynchronous Transfer Mode (ATM) network is implemented. The method mitigates network congestion by distributing the connection times of Local Area Network (LAN) Emulation Client (LEC) to an ELAN over random periods of time. When a LAN Emulation Server (LES) or Broadcast and Unknown Server (BUS) attempts to build point-to-multipoint connections to the LEC, it issues control messages to network switches. If the messages are dropped or rejected the LES or BUS recognizes the network is in a congested state and randomly retries to attempt connection.

摘要翻译： 实现了在异步传输模式（ATM）网络中的模拟局域网（ELAN）中减轻网络拥塞的方法。 该方法通过随机时间将局域网（LAN）仿真客户端（LEC）的连接时间分配给ELAN来减轻网络拥塞。 当LAN仿真服务器（LES）或广播和未知服务器（BUS）尝试构建到LEC的点对多点连接时，它向网络交换机发出控制消息。 如果消息丢失或拒绝，则LES或BUS识别网络处于拥塞状态，随机重试尝试连接。

公开(公告)号：US5909441A

公开(公告)日：1999-06-01

申请号：US840313

申请日：1997-04-11

申请人： Cedell Adam Alexander, Jr. ,  Edward Joel Rovner ,  Sonia Kiang Rovner

发明人： Cedell Adam Alexander, Jr. ,  Edward Joel Rovner ,  Sonia Kiang Rovner

IPC分类号： H04L12/46 ,  H04L12/56 ,  H04Q11/04 ,  H04L12/28

CPC分类号： H04Q11/0478 ,  H04L12/4608 ,  H04L2012/5617 ,  H04L2012/5668

摘要： To ensure a LES issues address resolution responses when necessary, an association between a MAC/ATM address pair and an intersubnet shortcut virtual channel connection (VCC) is registered. When the LES receives a first data frame being sent from a first station to a second station, with the second station having a MAC address associated with a shortcut VCC, a second data frame is created. The second data frame has as a source address the MAC address. The second frame is sent to devices associated with the first station so that the devices may learn the origination point for the second station and can issue messaging necessary to establish an shortcut VCC. In addition, frame loss reduction in an ATM communications network is accomplished by registering an association between a MAC address of a router associated with a MAC/ATM address pair, and a shortcut VCC. After the association is registered, a data frame being sent from a first station to a second station is received. The second station has the same MAC address as the MAC/ATM address pair. The destination MAC address of the data frame is replaced with the MAC address of the router, wherein the data frame can now be delivered. Also, a first station is prevented from having to wait to send data to a second station over a newly created shortcut VCC by registering an association between a MAC/ATM address pair and a shortcut VCC. Next, a flush request message from an edge device on an ELAN is received. The flush request has a destination ATM address equal to the ATM address of the MAC/ATM address pair. A flush response message is sent to the edge device, where upon receiving the flush response message, the edge device will start sending data from the first station to the second station over the newly created shortcut VCC.

摘要翻译： 为了确保LES在必要时发布地址解析响应，注册MAC / ATM地址对与子网间快捷虚拟通道连接（VCC）之间的关联。 当LES接收到从第一站发送到第二站的第一数据帧时，第二站具有与快捷方式VCC相关联的MAC地址，产生第二数据帧。 第二个数据帧作为MAC地址的源地址。 第二帧被发送到与第一站相关联的设备，使得设备可以学习第二站的发起点并且可以发出建立快捷方式VCC所需的消息。 此外，ATM通信网络中的帧丢失减少通过注册与MAC / ATM地址对相关联的路由器的MAC地址与快捷方式VCC之间的关联来实现。 在关联被注册之后，接收从第一站发送到第二站的数据帧。 第二站具有与MAC / ATM地址对相同的MAC地址。 数据帧的目标MAC地址被路由器的MAC地址替换，其中现在可以传送数据帧。 此外，通过注册MAC / ATM地址对和快捷方式VCC之间的关联，防止第一站等待通过新创建的快捷方式VCC向第二站发送数据。 接下来，接收来自ELAN上的边缘设备的刷新请求消息。 刷新请求具有等于MAC / ATM地址对的ATM地址的目的地ATM地址。 向边缘设备发送刷新响应消息，其中在接收到刷新响应消息时，边缘设备将通过新创建的快捷方式VCC开始从第一站向第二站发送数据。

公开(公告)号：US06560227B1

公开(公告)日：2003-05-06

申请号：US09027860

申请日：1998-02-23

申请人： Robert William Bartoldus ,  Brian Mitchell Bass ,  Timothy Lee Droz ,  Scott David Nellenbach ,  Kenneth H. Potter, Jr. ,  Edward Joel Rovner

发明人： Robert William Bartoldus ,  Brian Mitchell Bass ,  Timothy Lee Droz ,  Scott David Nellenbach ,  Kenneth H. Potter, Jr. ,  Edward Joel Rovner

IPC分类号： H04L1256

CPC分类号： H04L49/3009 ,  H04L49/30 ,  H04L49/351 ,  H04L49/354

摘要： A LAN interconnect device includes a plurality of Frame Processing Units (FPUs) for coupling each port of the device to a switch fabric. Each one of the Frame Processing Units includes an input section with input logic which prepares LS Headers and appends each one to a block of the frame as the block is forwarded to the switch fabric. The FPU, also, includes an output section with copy logic for copying and assembling frames to be forwarded to devices connected to the port. The copy decision is based upon the LS Header and configuration information in the port.

摘要翻译： LAN互连设备包括用于将设备的每个端口耦合到交换结构的多个帧处理单元（FPU）。 帧处理单元中的每一个包括具有输入逻辑的输入部分，其中准备LS报头并且随着块被转发到交换结构而将每一个附加到帧的块。 FPU还包括具有复制逻辑的输出部分，用于复制和组合要转发到连接到端口的设备的帧。 复制决定基于端口中的LS头和配置信息。

公开(公告)号：US5870589A

公开(公告)日：1999-02-09

申请号：US899024

申请日：1997-07-23

申请人： Cedell Adam Alexander, Jr. ,  John Kevin Frick ,  Matthew Blaze Squire ,  Edward Joel Rovner

发明人： Cedell Adam Alexander, Jr. ,  John Kevin Frick ,  Matthew Blaze Squire ,  Edward Joel Rovner

IPC分类号： G06F9/44 ,  G06F13/14

CPC分类号： H04L41/145 ,  H04L43/16 ,  H04L61/106 ,  H04L61/6022 ,  H04L61/604 ,  H04L12/5601

摘要： Provided are a method and system for achieving enhanced performance in communications involving one or more emulated networks overlaid onto at least one base network, where the emulation is performed by one or more network emulation servers-broadcast and unknown servers. The objects of the method and system are achieved via the following. Monitoring addresses of data transiting the one or more network emulation servers-broadcast and unknown servers where such monitored addresses are indicative of one or more functions provided by the one or more emulated networks. Tracking the monitored addresses. Comparing the tracked addresses, indicative of on or more functions provided by the one more emulated networks, with one or more prespecified thresholds indicative of monopolization of resources of the at least one emulated network. And, taking corrective action when the aforementioned comparing of addresses indicates that one or more entities associated with the tracked addresses are monopolizing resources of the at least one emulated network such that communications involving the at least one emulated network are enhanced.

摘要翻译： 提供了一种用于在涉及覆盖在至少一个基本网络上的一个或多个仿真网络的通信中实现增强的性能的方法和系统，其中仿真由一个或多个网络仿真服务器（广播和未知服务器）执行。 方法和系统的对象通过以下方式实现。 监视一个或多个网络仿真服务器的数据的地址 - 广播和未知服务器，其中这些监视的地址指示由一个或多个仿真网络提供的一个或多个功能。 跟踪监控的地址。 比较跟踪地址，指示由一个更多仿真网络提供的多个功能的一个或多个预定阈值，其指示所述至少一个仿真网络的资源的垄断。 并且，当前述的地址比较指示与所跟踪的地址相关联的一个或多个实体是所述至少一个仿真网络的垄断资源时，采取纠正措施，使得涉及所述至少一个仿真网络的通信被增强。

公开(公告)号：US07142509B1

公开(公告)日：2006-11-28

申请号：US09951169

申请日：2001-09-12

申请人： Edward Joel Rovner ,  Lance Richardson ,  Cedell A. Alexander

发明人： Edward Joel Rovner ,  Lance Richardson ,  Cedell A. Alexander

IPC分类号： H04L1/00

CPC分类号： H04L29/06027 ,  H04L1/18 ,  H04L65/4076 ,  H04L65/605

摘要： A network switch receives a data packet, recognizes the data packet as belonging to a given stream, and directs the data packet to a stream processing module in the network switch in response to recognizing the stream to which the packet belongs. The stream processing module further recognizes the source of the stream from which the packet was transmitted, and stores the data packet in a buffer for later transmission, as controlled by the stream processing module, to a destination for the stream. In this way, the stream may be replicated and transmitted by the stream processing module any number of times to multiple destinations in an efficient, cost-effective manner.

摘要翻译： 网络交换机接收数据分组，将数据分组识别为属于给定流，并响应于识别分组所属的流而将数据分组引导到网络交换机中的流处理模块。 流处理模块进一步识别从其发送分组的流的源，并将该数据分组存储在缓冲器中以便随后由流处理模块控制传输到流的目的地。 以这种方式，流可以由流处理模块以有效的，成本有效的方式任意次数复制和发送到多个目的地。

公开(公告)号：US06671253B1

公开(公告)日：2003-12-30

申请号：US09400204

申请日：1999-09-21

申请人： Cedell Adam Alexander, Jr. ,  John Kevin Frick ,  Edward Joel Rovner

发明人： Cedell Adam Alexander, Jr. ,  John Kevin Frick ,  Edward Joel Rovner

IPC分类号： G01R3108

CPC分类号： H04L12/4625

摘要： A method and system for providing enhanced peer redundancy in an ATM emulated local area network (ELAN) served by a primary LAN emulation server (LES), a peer LAN emulation server, a broadcast and unknown server (BUS), and a LAN emulation configuration server (LECS). An enhanced peer redundancy virtual channel connection (VCC) is established between the primary LES/BUS and the peer LES/BUS. The primary LES/BUS and the peer LES/BUS exchange status messages every two seconds indicating the number of assigned LECs. If the primary has fewer LECs than the peer, the primary yields to the peer as the active LES/BUS. If an enhanced redundancy VCC was not established, the backup LES/BUS provides ELAN services while waiting for the primary to call to establish an enhanced redundancy VCC. If an enhanced peer redundancy VCC cannot be established, the primary attempts to establish a redundancy VCC with the peer in which the peer LES/BUS is kept in a dormant mode as long as the redundancy VCC is present. If the redundancy VCC is absent, the peer LES/BUS is activated to service the ELAN.

摘要翻译： 一种用于在由主LAN仿真服务器（LES），对等LAN仿真服务器，广播和未知服务器（BUS）以及LAN仿真配置服务的ATM模拟局域网（ELAN）中提供增强的对等冗余的方法和系统 服务器（LECS）。 在主LES / BUS和对等LES / BUS之间建立增强的对等冗余虚拟通道连接（VCC）。 主LES / BUS和对等LES / BUS交换状态消息每隔两秒表示分配的LEC数。 如果主要的LEC比对等体更少，则作为活动的LES / BUS的对等体的主要产出。 如果没有建立增强冗余VCC，则备用LES / BUS提供ELAN服务，同时等待主要呼叫建立增强型冗余VCC。 如果增强对等体冗余VCC不能建立，主要尝试与对等体建立冗余VCC，其中对等体LES / BUS保持在休眠模式，只要存在冗余VCC。 如果不存在冗余VCC，则激活对等体LES / BUS来为ELAN服务。

公开(公告)号：US06345055B1

公开(公告)日：2002-02-05

申请号：US09153189

申请日：1998-09-15

申请人： John Kevin Frick ,  Edward Joel Rovner ,  Cedell Adam Alexander, Jr.

发明人： John Kevin Frick ,  Edward Joel Rovner ,  Cedell Adam Alexander, Jr.

IPC分类号： H04J1500

CPC分类号： H04L12/5601 ,  H04J15/00 ,  H04L12/4608 ,  H04L2012/5617

摘要： A method for providing interoperability between multiple versions of LUNI within a mixed Asynchronous Transfer Mode emulated LAN is disclosed. The mixed ATM emulated LAN includes multiple LAN emulated clients (LE clients) having different versions of LAN Emulation User Network Interface (LUNI), such as a first version LUNI and a second version LUNI. The mixed ATM emulated LAN is served by a LAN Emulation Server (LES), a Broadcast and Unknown Server (BUS), and a LAN Emulation Configuration Server (LECS). When an LE Control Frame is being sent by an LE client having a second version LUNI, a determination is made as to whether or not the LE Control Frame will be received by an LE client having a first version LUNI. In response to a determination that the LE Control Frame sent by the LE client having a second version LUNI will be received by an LE client having a first version LUNI, the LE Control Frame is copied, and the copied LE Control Frame is converted to an LE Control Frame with a format that is readable by the LE client having a first version LUNI.

摘要翻译： 公开了一种在混合异步传输模式仿真LAN中提供多个版本的LUNI之间的互操作性的方法。 混合ATM模拟LAN包括具有不同版本的LAN仿真用户网络接口（LUNI）的多个LAN模拟客户端（LE客户端），例如第一版本LUNI和第二版本LUNI。 混合ATM模拟LAN由LAN仿真服务器（LES），广播和未知服务器（BUS）和LAN仿真配置服务器（LECS）提供。 当由具有第二版本的LUNI的LE客户机发送LE控制帧时，确定LE控制帧是否将被具有第一版本LUNI的LE客户端接收。 响应于具有第二版本的LUNI的LE客户端发送的LE控制帧将被具有第一版本LUNI的LE客户端接收到，LE控制帧被复制，并且复制的LE控制帧被转换为 LE控制帧，具有LE客户机可读取的第一版本的LUNI格式。

公开(公告)号：US06553421B1

公开(公告)日：2003-04-22

申请号：US09153713

申请日：1998-09-15

申请人： John Kevin Frick ,  Daniel Dean Heimsoth ,  Jon Michael Houghton ,  Edward Joel Rovner

发明人： John Kevin Frick ,  Daniel Dean Heimsoth ,  Jon Michael Houghton ,  Edward Joel Rovner

IPC分类号： G06F1516

CPC分类号： H04L29/12018 ,  H04L12/4625 ,  H04L12/5601 ,  H04L29/12009 ,  H04L29/12811 ,  H04L49/201 ,  H04L49/351 ,  H04L61/10 ,  H04L61/301 ,  H04L61/6009 ,  H04L67/42

摘要： A data communication network includes a network client, a network server, and a name caching entity located between the network client and the network server. The network server is coupled to the data communication network by a plurality of network adapters that each have a different network (e.g., Media Access Control (MAC)) address, but share a common logical name. The name caching entity includes a name cache, which stores the common logical name shared by the server's network adapters in association with the network address of one of the network adapters. By reference to the name cache, the name caching entity is able to convert broadcast frames to unicast frames, thereby advantageously reducing broadcast frames in the network. The name caching entity will disassociate the logical name and the network address in the name cache in response to a failure to detect a frame indicating the establishment of a session with the network server within a selected interval of transmission of a frame requesting establishment of a session with the network server. In this manner, the network client can establish a session with the network server through another network adapter in cases in which the network adapter whose network address is stored in the name cache cannot support an additional session.

摘要翻译： 数据通信网络包括位于网络客户端和网络服务器之间的网络客户端，网络服务器和名称缓存实体。 网络服务器通过多个网络适配器耦合到数据通信网络，每个网络适配器各自具有不同的网络（例如，媒体访问控制（MAC））地址，但共享公共的逻辑名称。 名称缓存实体包括名称缓存，其存储由服务器的网络适配器共享的公共逻辑名与网络适配器之一的网络地址相关联。 通过参考名称缓存，名称缓存实体能够将广播帧转换为单播帧，从而有利地减少网络中的广播帧。 响应于在请求建立会话的帧的传输的所选择的间隔内检测到指示与网络服务器建立会话的帧的故障，名称缓存实体将解除名称高速缓存中的逻辑名称和网络地址的关联。 与网络服务器。 以这种方式，网络客户端可以在其网络地址存储在名称高速缓存中的网络适配器不能支持附加会话的情况下通过另一网络适配器与网络服务器建立会话。

公开(公告)号：US6104870A

公开(公告)日：2000-08-15

申请号：US109143

申请日：1998-07-02

申请人： John Kevin Frick ,  John Edward Dickey ,  John Lloyd ,  Deepak Vig ,  Edward Joel Rovner

发明人： John Kevin Frick ,  John Edward Dickey ,  John Lloyd ,  Deepak Vig ,  Edward Joel Rovner

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04Q11/04 ,  G06F9/455

CPC分类号： H04Q11/0478 ,  H04L2012/5617 ,  H04L2012/5618 ,  H04L2012/5626 ,  H04L2012/5667

摘要： A method and system for improving communications in data communications networks which provide network emulation. The method and system accomplish their objects via communications equipment adapted to do the following: implant a number of distributed-redundant gateways in an emulated network; and dynamically assign access to operational distributed-redundant gateways. In one embodiment, the network emulation is an Asynchronous Transfer Mode Emulation Local Area Network (ATM ELAN), and the distributed-redundant gateways operate as default Internet Protocol (IP) gateway utilized by LAN Emulation Clients (LE Clients) of the ATM ELAN. Also in one embodiment, the dynamic assignment of access is done such that the data communications loading associated with the default IP gateway is distributed throughout a data communications network.

摘要翻译： 一种用于改善提供网络仿真的数据通信网络中的通信的方法和系统。 该方法和系统通过适于执行以下操作的通信设备完成其对象：在仿真网络中注入多个分布式冗余网关; 并动态分配对操作分布式冗余网关的访问。 在一个实施例中，网络仿真是异步传输模式仿真局域网（ATM ELAN），并且分布式冗余网关作为ATM ELAN的LAN仿真客户端（LE客户端）利用的默认互联网协议（IP）网关。 同样在一个实施例中，进行访问的动态分配，使得与默认IP网关相关联的数据通信负载分布在整个数据通信网络中。