公开(公告)号：US08130637B2

公开(公告)日：2012-03-06

申请号：US11962406

申请日：2007-12-21

申请人： Kenneth R. Owens ,  Srinivas V. Makam ,  Changcheng Huang ,  Vishal Sharma

发明人： Kenneth R. Owens ,  Srinivas V. Makam ,  Changcheng Huang ,  Vishal Sharma

IPC分类号： G01R31/08 ,  G06F11/00 ,  H04L1/00 ,  H04L12/40

CPC分类号： H04L12/462 ,  H04L12/4641 ,  H04L43/0817 ,  H04L45/00 ,  H04L45/02 ,  H04L45/22 ,  H04L45/28 ,  H04L45/502

摘要： Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to upstream switching system that the downstream traffic arrived in tact and was properly handled. Upon this loss or failure of the upstream status message to an upstream switching system, an upstream switching system can reroute data traffic around a failed link or failed switch with a minimal amount of lost data. The upstream status message is conveyed from a downstream switching system to an upstream switching system via a reverse notification tree data pathway.

摘要翻译： 如果下游数据交换机向上游交换系统提供指示下游流量到达并正确处理的上行消息，则可以最小化异步数据网络中的链路或交换系统故障时的恢复时间。 在向上游交换系统发生上游状态消息的丢失或失败时，上游交换系统可以以最小量的丢失数据重新路由出现故障链路或故障交换机周围的数据流量。 上游状态消息经由反向通知树数据路径从下游交换系统传送到上游交换系统。

公开(公告)号：US07957375B2

公开(公告)日：2011-06-07

申请号：US12256892

申请日：2008-10-23

申请人： Yongle Sun ,  Xia Chen ,  Wen Zhou

发明人： Yongle Sun ,  Xia Chen ,  Wen Zhou

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04L12/66 ,  G06F15/173

CPC分类号： H04L45/00 ,  H04L45/50 ,  H04L45/502

摘要： An apparatus and method for policy routing is provided. The method includes: A. configuring a policy routing to a label switching path and obtaining and saving forwarding information; and B. performing packet forwarding based on the forwarding information. The apparatus includes: a label switching path managing unit, for saving first forwarding information of the label switching path; a route managing unit, for saving second forwarding information of the label switching path; a configuring unit, for transmitting configuration parameters to the label switching path managing unit, and obtaining the first and/or second forwarding information of the label switching path from the label switching path managing unit and/or route managing unit; a forwarding information maintenance unit, for maintaining the first and second forwarding information of the label switching path saved in a node of policy; and a packet forwarding unit, together with the forwarding information maintenance unit, for forwarding the packet, which solves the problem that the prior art couldn't well support strategic route for a MPLS packet.

摘要翻译： 提供了一种策略路由的设备和方法。 该方法包括：A.配置策略路由到标签交换路径，获取并保存转发信息; 和B.根据转发信息进行包转发。 该设备包括：标签交换路径管理单元，用于保存标签交换路径的第一转发信息; 路由管理单元，用于保存所述标签交换路径的第二转发信息; 配置单元，用于将配置参数发送到标签交换路径管理单元，以及从标签交换路径管理单元和/或路由管理单元获取标签交换路径的第一和/或第二转发信息; 转发信息维护单元，用于维护保存在策略节点中的标签交换路径的第一和第二转发信息; 以及与转发信息维护单元一起转发分组的分组转发单元，其解决了现有技术不能很好地支持MPLS分组的策略路由的问题。

公开(公告)号：US20110029602A1

公开(公告)日：2011-02-03

申请号：US12891167

申请日：2010-09-27

申请人： Andrew James Barker

发明人： Andrew James Barker

IPC分类号： G06F15/16 ,  H04J14/00

CPC分类号： H04B10/271 ,  H04L12/46 ,  H04L45/04 ,  H04L45/502 ,  H04Q11/0062 ,  H04Q11/0066 ,  H04Q11/0071 ,  H04Q2011/0077 ,  H04Q2011/0088 ,  H04Q2213/1301 ,  H04Q2213/13204 ,  H04Q2213/13348 ,  H04Q2213/13349 ,  H04Q2213/1338 ,  H04Q2213/13389 ,  Y10S370/902

摘要： A first Multi Protocol Label Switching (MPLS) Internet Protocol (IP) data network transmits data to a second MPLS IP network via a legacy network, which would not otherwise be able to handle the required user network interface (UNI) protocol by configuring the legacy network and its network management system (TNMS) so that they emulate an MPLS network. When a first network element (NE) receives a connection (UNI) request from the MPLS network under a UNI protocol, the UNI request is passed to the TNMS, which then sets the required connection across the legacy network via a second edge NE to an NE of the second network. Once the connection has been set, the TNMS instructs the edge NE to send a return signal to the requesting network indicating that the connection has been successfully set. Data packets may then be transmitted across the network.

摘要翻译： 第一个多协议标签交换（MPLS）因特网协议（IP）数据网络通过传统网络将数据传输到第二个MPLS IP网络，传统网络将无法通过配置遗留物来处理所需的用户网络接口（UNI）协议 网络及其网络管理系统（TNMS），从而模拟MPLS网络。 当第一网元（NE）在UNI协议下从MPLS网络接收到连接（UNI）请求时，UNI请求被传递给TNMS，TNMS通过第二边缘NE将所需的连接跨越传统网络， NE的第二个网络。 一旦连接被设置，TNMS指示边缘网元向请求网络发送一个返回信号，指示连接已成功设置。 然后可以在网络上传输数据分组。

公开(公告)号：US07873053B2

公开(公告)日：2011-01-18

申请号：US12103528

申请日：2008-04-15

申请人： Dimitri Papadimitriou

发明人： Dimitri Papadimitriou

IPC分类号： H04L12/56

CPC分类号： H04L47/827 ,  H04L45/245 ,  H04L45/502 ,  H04L47/70 ,  Y02D50/30

摘要： An embodiment includes encoding, into a resource reservation signaling message, (i) a group identifier assigned to a group of pseudo point-to-point connections established between a root node and at least one leaf node and (ii) a sub-group identifier assigned to a sub-group of pseudo point-to-point connections out of the group of pseudo point-to-point connections. The sub-group of pseudo point-to-point connections share a common network tunnel established between a previous signaling hop and a next signaling hop. The method further includes aggregating, into the resource reservation signaling message, resource reservation signaling related to the sub-group of pseudo point-to-point connections based on the group identifier and the sub-group identifier. The resource reservation signaling message is then exchanged between the previous signaling hop and the next signaling hop.

摘要翻译： 实施例包括编码到资源预留信令消息中，（i）分配给在根节点和至少一个叶节点之间建立的一组伪点对点连接的组标识符和（ii）子组标识符 分配给伪点对点连接组之间的伪点对点连接的子组。 伪点对点连接的子组共享在先前的信令跳和下一个信令跳之间建立的公共网络隧道。 该方法还包括基于组标识符和子组标识符向资源预留信令消息中聚合与伪点对点连接子组相关的资源预留信令。 然后在先前的信令跳跃和下一个信令跳跃之间交换资源预留信令消息。

公开(公告)号：US07796504B1

公开(公告)日：2010-09-14

申请号：US09692884

申请日：2000-10-20

申请人： Kenneth R. Owens ,  Srinivas V. Makam ,  Changcheng Huang ,  Vishal Sharma

发明人： Kenneth R. Owens ,  Srinivas V. Makam ,  Changcheng Huang ,  Vishal Sharma

IPC分类号： G01R31/08

CPC分类号： H04L45/28 ,  H04L29/06 ,  H04L45/02 ,  H04L45/22 ,  H04L45/502 ,  H04L69/40 ,  H04Q11/0478

摘要： Recovery time upon the failure of a link or switching system in an asynchronous data network can be minimized if downstream data switches provide upstream messages indicating to upstream switching system that the downstream traffic arrived in tact and was properly handled. Upon this loss or failure of the upstream status message to an upstream switching system, an upstream switching system can reroute data traffic around a failed link or failed switch with a minimal amount of lost data. The upstream status message is conveyed from a downstream switching system to an upstream switching system via a reverse notification tree data pathway. The reverse notification pathway is established by using a messaging protocol between network switches by which the working and protection paths, among other things, are established.

摘要翻译： 如果下游数据交换机向上游交换系统提供指示下游流量到达并正确处理的上行消息，则可以最小化异步数据网络中的链路或交换系统故障时的恢复时间。 在向上游交换系统发生上游状态消息的丢失或失败时，上游交换系统可以以最小量的丢失数据重新路由出现故障链路或故障交换机周围的数据流量。 上游状态消息经由反向通知树数据路径从下游交换系统传送到上游交换系统。 通过在网络交换机之间使用消息传递协议来建立反向通知路径，通过该路由，建立工作和保护路径。

公开(公告)号：US07782764B2

公开(公告)日：2010-08-24

申请号：US11989385

申请日：2006-05-26

申请人： Kang Zi

发明人： Kang Zi

IPC分类号： H04J3/14 ,  G06F11/00 ,  H04L12/26 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04L12/4641 ,  H04L12/2878 ,  H04L43/0817 ,  H04L45/00 ,  H04L45/22 ,  H04L45/28 ,  H04L45/502 ,  H04L45/68

摘要： A method and system for switching the serving services of virtual private LAN is provided. When a fault occurs on a normal service transmission path, a PE device on the secondary path transmits a message including an information of the failure device on the normal service transmission path to the other PE devices on the path to indicate the path switching; the other PE devices replace the faulty PE device corresponding to the transmission path item in VPLS transmission table as the PE device on the secondary path according to the received message for indicating the path switching. Using the present invention, when an access device detects a fault, the VPLS service can switch to the secondary path immediately without affecting other services; because the VPLS messages do not need to be broadcasted during path switching, the network bandwidth will not be wasted.

摘要翻译： 提供了一种用于切换虚拟专用LAN的服务的方法和系统。 当正常业务传输路径发生故障时，辅路径上的PE设备将正常业务传输路径上的故障设备信息的消息发送到路径上的其他PE设备，以指示路径切换; 其他PE设备根据接收到的指示路径切换的消息，将VPLS传输表中的传输路径项对应的故障PE设备替换为辅路径上的PE设备。 使用本发明，当接入设备检测到故障时，VPLS业务可以立即切换到辅助路径而不影响其他业务; 因为在路径切换期间不需要广播VPLS消息，所以不会浪费网络带宽。

公开(公告)号：US20100166005A1

公开(公告)日：2010-07-01

申请号：US12669719

申请日：2008-07-18

申请人： Frederic Jounay ,  Philippe Niger

发明人： Frederic Jounay ,  Philippe Niger

IPC分类号： H04L12/56

CPC分类号： H04L45/00 ,  H04L45/502

摘要： A method is provided for communicating between first and second routers, the routers being part of a packet-switched network. The method includes a stage of transmitting data over a pseudowire set up between the first and second routers, the data being transmitted in accordance with a parameter of the pseudowire. The method includes at least one step of sending a modification request message of the parameter at the initiative of one of the two routers, to the other router, and during the stage of transmission over the pseudowire. Also, a method is provided for processing data transmitted over such a pseudowire. The method includes a stage of transmission of data over the pseudowire, the data being transmitted in accordance with a parameter of the pseudowire. The method includes, during the transmission stage, at least one of the routers receiving a modification request message of the parameter of the pseudowire.

摘要翻译： 提供了用于在第一和第二路由器之间通信的方法，路由器是分组交换网络的一部分。 该方法包括通过在第一和第二路由器之间建立的伪线传输数据的阶段，数据是根据伪线的参数发送的。 该方法包括至少一个步骤，在两个路由器之一的主动下将参数的修改请求消息发送到另一个路由器，并且在伪线传输阶段期间。 此外，提供了一种用于处理通过这样的伪线传送的数据的方法。 该方法包括在伪线上传输数据的阶段，数据根据伪线的参数传输。 该方法包括在传输阶段期间，至少一个路由器接收伪线参数的修改请求消息。

公开(公告)号：US20100158014A1

公开(公告)日：2010-06-24

申请号：US12717371

申请日：2010-03-04

申请人： Masaya Arai ,  Manabu Fujita

发明人： Masaya Arai ,  Manabu Fujita

IPC分类号： H04L12/56

CPC分类号： H04L12/2856 ,  H04L12/2898 ,  H04L12/4641 ,  H04L45/245 ,  H04L45/502 ,  Y02D50/30

摘要： When a network apparatus of this invention receives an IEEE 802.3ad link application control packet from a subscriber line with a VPWS function, it processes the packet in a control unit without relaying the packet by VPWS. More specifically, the network apparatus receives an IEEE802.3ad link aggregation control packet along with receiving an IEEE802.3x flow control packet. The network apparatus transmits a link aggregation control packet. The network apparatus also relays other layer 2 control protocol packets without receiving them, and does not transmit the other layer 2 control protocol packets.

摘要翻译： 当本发明的网络装置从具有VPWS功能的用户线路接收到IEEE 802.3ad链路应用控制分组时，处理控制单元中的分组，而不用VPWS中继分组。 更具体地，网络装置接收IEEE802.3ad链路聚合控制分组以及接收IEEE802.3x流量控制分组。 网络装置发送链路聚合控制分组。 网络设备也不接收其他层2控制协议报文，不发送其他层2控制协议报文。

公开(公告)号：US07620712B1

公开(公告)日：2009-11-17

申请号：US10385995

申请日：2003-03-11

申请人： David Allan

发明人： David Allan

IPC分类号： G06F15/173

CPC分类号： H04L43/50 ,  H04L41/0873 ,  H04L43/00 ,  H04L43/0811 ,  H04L43/10 ,  H04L43/12 ,  H04L45/00 ,  H04L45/502 ,  H04L45/507 ,  H04L67/1095

摘要： Mechanisms for measuring network availability are described. A first network element produces a first knowledge digest encoding the first set of forwarding policy indicators associated with a set of packets into a fixed length bit array. The first network element periodically sends probe messages containing the knowledge digest to a second network element. The second network element produces a second knowledge digest encoding a second set of forwarding policy indicators into a fixed length bit array. The second network element compares the first knowledge digest to the second knowledge digest to determine whether the first set of forwarding policy indicators is a subset of the second set of forwarding policy indicators. The second network element indicates the availability of the path as long as probe messages are received from the first network element.

摘要翻译： 描述了测量网络可用性的机制。 第一网络元件产生将与一组分组相关联的第一组转发策略指示符编码为固定长度位阵列的第一知识摘要。 第一网络元件周期性地将包含知识摘要的探测消息发送到第二网络元件。 第二网络元件产生将第二组转发策略指示符编码为固定长度位阵列的第二知识摘要。 第二网络元件将第一知识摘要与第二知识摘要进行比较，以确定第一组转发策略指示符是否是第二组转发策略指示符的子集。 只要从第一个网络元件接收到探测消息，第二个网络元素就指示路径的可用性。

公开(公告)号：US07529243B2

公开(公告)日：2009-05-05

申请号：US10621849

申请日：2003-07-16

申请人： Arnold Sodder ,  Timothy Mancour ,  Louis Didiodato

发明人： Arnold Sodder ,  Timothy Mancour ,  Louis Didiodato

IPC分类号： H04L12/56 ,  H04L12/66

CPC分类号： H04L12/4641 ,  A61B6/488 ,  H04L12/4625 ,  H04L45/04 ,  H04L45/502

摘要： A method and apparatus are provided for creating a virtual hierarchical local area network. The method and apparatus provide a hierarchical framing technique that allows a network architecture to realize a local area network hierarchy within the network. In this manner, a first local area network hierarchy is defined by communication in a first frame format between a first set of network devices and a second set of network devices. A second local area network hierarchy is defined by communication in a second frame format between members of the second set of network devices. The second frame format includes the fields of a frame in the first frame format that is used to communicate between the first set of communication devices and the second set of communication devices.

摘要翻译： 提供了一种用于创建虚拟分层局域网的方法和装置。 该方法和装置提供了允许网络架构实现网络内的局域网层次结构的分级成帧技术。 以这种方式，通过在第一组网络设备和第二组网络设备之间的第一帧格式的通信来定义第一局域网层级。 第二局域网层级由第二组网络设备的成员之间以第二帧格式的通信来定义。 第二帧格式包括用于在第一组通信设备和第二组通信设备之间进行通信的第一帧格式的帧的字段。