公开(公告)号：US07408941B2

公开(公告)日：2008-08-05

申请号：US11152523

申请日：2005-06-14

申请人： Luca Martini ,  Keyur Patel ,  Thomas D. Nadeau ,  James N. Guichard

发明人： Luca Martini ,  Keyur Patel ,  Thomas D. Nadeau ,  James N. Guichard

IPC分类号： H04L12/28 ,  H04L12/66 ,  G06F15/16 ,  G06F15/173

CPC分类号： H04L45/50 ,  H04L45/04

摘要： A method and computer system for auto-routing of multi-hop pseudowires is presented. A first Provider Edge (PE) device receives an advertisement from a layer 2 (L2) capable network device, the advertisement including routing state for reaching the L2 device. A first Border Gateway Protocol (BGP) table is populated with the routing state for the L2 capable network device which is reachable by way of an address family reserved for L2 end point reachability information. The first PE device advertises the first BGP table information within a first Service Provider (SP) network such that a multi-hop Pseudowire is capable of being established which includes the L2 capable device.

摘要翻译： 提出了一种用于多跳伪线自动路由的方法和计算机系统。 第一提供商边缘（PE）设备从具有层2（L2）的网络设备接收广告，该广告包括到达L2设备的路由状态。 第一个边界网关协议（BGP）表填充有L2能力的网络设备的路由状态，该路由状态可以通过为L2端点可达性信息保留的地址族可达。 第一PE设备在第一服务提供商（SP）网络内通告第一BGP表信息，使得能够建立包括L2能力设备的多跳伪线。

公开(公告)号：US07869436B1

公开(公告)日：2011-01-11

申请号：US11250010

申请日：2005-10-13

申请人： Saul Adler ,  James N. Guichard ,  Luca Martini ,  Venkateswara Rao Yarlagadda ,  W. Scott Wainner

发明人： Saul Adler ,  James N. Guichard ,  Luca Martini ,  Venkateswara Rao Yarlagadda ,  W. Scott Wainner

IPC分类号： H04L12/28

CPC分类号： H04L12/4641 ,  H04L29/12216 ,  H04L61/2007 ,  H04L63/0272 ,  H04L63/08

摘要： A system allows a device to communicate using a virtual network the method by assigning a network address to the device. The network address is selected from a plurality of network addresses that can be assigned to any of a plurality of virtual networks. The system receives a request to authenticate the device, and then determines a virtual network on which to assign the device. The virtual network is selected from the plurality of virtual networks. The system identifies the device as authenticated based on the assigning of the network address and the virtual network.

摘要翻译： 系统允许设备使用虚拟网络通过向设备分配网络地址来进行通信。 从可以分配给多个虚拟网络中的任一个的多个网络地址中选择网络地址。 系统接收到认证设备的请求，然后确定要在其上分配设备的虚拟网络。 从多个虚拟网络中选择虚拟网络。 系统根据网络地址和虚拟网络的分配来识别设备的身份认证。

公开(公告)号：US07787396B1

公开(公告)日：2010-08-31

申请号：US10855769

申请日：2004-05-27

申请人： Gargi Nalawade ,  James N. Guichard ,  Luca Martini

发明人： Gargi Nalawade ,  James N. Guichard ,  Luca Martini

IPC分类号： H04L12/66

CPC分类号： H04L45/04 ,  H04L45/02 ,  H04L45/18 ,  H04L45/20

摘要： A method, apparatus and computer program product for providing Outbound Route Filtering (ORF) is presented. An ORF list is produced and an ORF filter is built from the ORF list. The ORF list is built from received ORF entries. The ORF list is advertised to client and non-client peers. The ORF filter is built from a received ORF list and is directed toward the advertiser of the ORF list.

摘要翻译： 提出了一种用于提供出站路由过滤（ORF）的方法，设备和计算机程序产品。 生成ORF列表，并从ORF列表构建ORF过滤器。 ORF列表是从接收到的ORF条目构建的。 ORF列表被通告给客户端和非客户端对等体。 ORF过滤器是从接收到的ORF列表构建的，并且指向ORF列表的广告客户。

公开(公告)号：US08804496B2

公开(公告)日：2014-08-12

申请号：US13315948

申请日：2011-12-09

申请人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

发明人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

IPC分类号： G01R31/08

CPC分类号： H04L45/04 ,  H04L1/22 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/68

摘要： The protection of multi-segment pseudowires by utilizing backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a backup path is chosen, and reachability information associated with the chosen backup path is signaled across the backup path before reverse traffic is switched to the backup path. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire.

摘要翻译： 本文公开了通过利用备用路径保护多段伪线。 公开的实施例包括为多段伪线建立至少一个备用路径的方法，该建立是在检测到主路径中的故障之前执行的。 在检测到路径故障时，将检测到的故障信号发送到前端，选择备份路径，并且在将反向流量切换到备份路径之前通过备份路径发信号通知所选备份路径的可达性信息。 在其他公开的实施例中，设备被配置为在检测到主路径中的故障之前建立用于多段伪线的至少一个备用路径。

公开(公告)号：US07697439B2

公开(公告)日：2010-04-13

申请号：US11126486

申请日：2005-05-10

申请人： Luca Martini ,  Keyur Patel

发明人： Luca Martini ,  Keyur Patel

IPC分类号： H04L12/26

CPC分类号： H04L45/123 ,  H04L45/04 ,  H04L45/12

摘要： A method for determining a cumulative network layer reachability cost of traversing one or more autonomous network routing systems comprises receiving first network route information from an originating customer edge router, wherein the first network route information identifies a route in a customer network; determining a transit cost from the provider edge router to an endpoint associated with the originating customer edge router based upon a metric value received in a cost community attribute; repeating the determining step for each of one or more autonomous systems that lie in a path from the originating customer edge router to a destination customer edge router, to result in determining an accumulated transit costs across one or more autonomous systems; and determining, based at least in part upon the accumulated transit cost, a best path from the provider edge router to the endpoint associated with the originating customer edge router.

摘要翻译： 用于确定遍历一个或多个自主网络路由系统的累积网络层可达性成本的方法包括从始发客户边缘路由器接收第一网络路由信息，其中所述第一网络路由信息识别客户网络中的路由; 基于在成本共同体属性中接收到的度量值，确定从所述提供者边缘路由器到与所述始发客户边缘路由器相关联的端点的传输成本; 对位于从起始客户边缘路由器到目标客户边缘路由器的路径中的一个或多个自治系统中的每一个重复确定步骤，以导致确定跨越一个或多个自治系统的累积过境成本; 以及至少部分地基于累积的转移成本确定从提供商边缘路由器到与始发客户边缘路由器相关联的端点的最佳路径。

公开(公告)号：US08081563B2

公开(公告)日：2011-12-20

申请号：US11580167

申请日：2006-10-11

申请人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

发明人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

IPC分类号： G01R31/08

CPC分类号： H04L45/04 ,  H04L1/22 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/68

摘要： The protection of multi-segment pseudowires by utilizing pre-computed backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a pre-computed backup path is chosen, and the chosen backup path is signaled to the tail-end. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire. Networks can be configured to signal a detected failure to the head-end; choose a pre-computed backup path; and signal the backup path to the tail-end.

摘要翻译： 本文公开了通过利用预先计算的备用路径来保护多段伪线。 公开的实施例包括为多段伪线建立至少一个备用路径的方法，该建立是在检测到主路径中的故障之前执行的。 在检测到路径故障时，将检测到的故障信号发送到前端，选择预先计算的备份路径，并将选定的备份路径发送到尾端。 在其他公开的实施例中，设备被配置为在检测到主路径中的故障之前建立用于多段伪线的至少一个备用路径。 网络可以配置为将检测到的故障信号发送到前端; 选择预先计算的备份路径; 并将后备路径指示给尾端。

公开(公告)号：US07668178B2

公开(公告)日：2010-02-23

申请号：US11214521

申请日：2005-08-30

申请人： Luca Martini ,  Keyur Patel ,  W. Mark Townsley

发明人： Luca Martini ,  Keyur Patel ,  W. Mark Townsley

IPC分类号： H04L12/28

CPC分类号： H04L12/4691 ,  H04L12/4641 ,  H04L45/00 ,  H04L45/50

摘要： Implementation of a VPN service such as a VPLS (Virtual Private Local area network Service) is performed utilizing a two-stage process. A first stage of the two-stage process involves providing notification of whether a PE (Provider Edge) router in a label-switching network has VPLS capability. Notification can include broadcasting a message from a PE router to remote PE routers in the label-switching network to indicate whether the broadcasting PE router is VPLS enabled. A second stage of the two-stage process involves, based on receiving a notification that a PE router is VPLS enabled, generating a query message to discover a set of VPLS instances to which the broadcasting PE router belongs. In this way, a given PE router generating the query message can identify other PE routers in the label-switching network associated with the same VPLS for purposes of setting up the VPLS in the label-switching network.

摘要翻译： 使用两阶段处理来执行诸如VPLS（虚拟专用局域网服务）之类的VPN服务的实现。 两级流程的第一阶段涉及提供标签交换网络中的PE（Provider Edge）路由器是否具有VPLS能力的通知。 通知可以包括从PE路由器向标签交换网络中的远程PE路由器广播消息，以指示广播PE路由器是否启用VPLS。 两级处理的第二阶段是基于接收到PE路由器启用VPLS的通知，生成查询消息以发现广播PE路由器所属的一组VPLS实例。 以这种方式，生成查询消息的给定PE路由器可以识别与相同VPLS相关联的标签交换网络中的其他PE路由器，以便在标签交换网络中建立VPLS。

公开(公告)号：US20060291445A1

公开(公告)日：2006-12-28

申请号：US11152523

申请日：2005-06-14

申请人： Luca Martini ,  Keyur Patel ,  Thomas Nadeau ,  James Guichard

发明人： Luca Martini ,  Keyur Patel ,  Thomas Nadeau ,  James Guichard

IPC分类号： H04L12/28

CPC分类号： H04L45/50 ,  H04L45/04

摘要： A method and computer system for auto-routing of multi-hop pseudowires is presented. A first Provider Edge (PE) device receives an advertisement from a layer 2 (L2) capable network device, the advertisement including routing state for reaching the L2 device. A first Border Gateway Protocol (BGP) table is populated with the routing state for said L2 capable network device which is reachable by way of an address family reserved for L2 end point reachability information. The first PE device advertises the first BGP table information within a first Service Provider (SP) network such that a multi-hop Pseudowire is capable of being established which includes the L2 capable device.

摘要翻译： 提出了一种用于多跳伪线自动路由的方法和计算机系统。 第一提供商边缘（PE）设备从具有层2（L2）的网络设备接收广告，该广告包括到达L2设备的路由状态。 第一个边界网关协议（BGP）表填充有可通过为L2端点可达性信息保留的地址族可达的所述L2能力网络设备的路由状态。 第一PE设备在第一服务提供商（SP）网络内通告第一BGP表信息，使得能够建立包括L2能力设备的多跳伪线。

公开(公告)号：US20120082025A1

公开(公告)日：2012-04-05

申请号：US13315948

申请日：2011-12-09

申请人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

发明人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

IPC分类号： H04L12/26

CPC分类号： H04L45/04 ,  H04L1/22 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/68

摘要： The protection of multi-segment pseudowires by utilizing backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a backup path is chosen, and reachability information associated with the chosen backup path is signaled across the backup path before reverse traffic is switched to the backup path. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire.

摘要翻译： 本文公开了通过利用备用路径保护多段伪线。 公开的实施例包括为多段伪线建立至少一个备用路径的方法，该建立是在检测到主路径中的故障之前执行的。 在检测到路径故障时，将检测到的故障信号发送到前端，选择备份路径，并且在将反向流量切换到备份路径之前通过备份路径发信号通知所选备份路径的可达性信息。 在其他公开的实施例中，设备被配置为在检测到主路径中的故障之前建立用于多段伪线的至少一个备用路径。

公开(公告)号：US20080285466A1

公开(公告)日：2008-11-20

申请号：US11804615

申请日：2007-05-19

申请人： Samer M. Salam ,  Thomas D. Nadeau ,  Luca Martini ,  Ali Sajassi

发明人： Samer M. Salam ,  Thomas D. Nadeau ,  Luca Martini ,  Ali Sajassi

IPC分类号： H04L12/26 ,  H04L12/24

CPC分类号： H04L41/06 ,  H04L41/0226 ,  H04L45/50 ,  H04L67/28 ,  H04L67/2861 ,  H04L69/40

摘要： In one embodiment, a method includes receiving, by a provider edge (PE) device, a transport layer status message indicative of a defect on a pseudowire (PW) running across a core of a service provider (SP) network. The status message is translated to a service layer message indicative of the defect. The service layer message is then transmitted across an access domain of the SP network. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

摘要翻译： 在一个实施例中，一种方法包括由提供商边缘（PE）设备接收指示在跨服务提供商（SP）网络的核心运行的伪线（PW）上的缺陷的传输层状态消息。 状态消息被转换为指示缺陷的服务层消息。 服务层消息然后通过SP网络的接入域传输。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。