公开(公告)号：US20070268817A1

公开(公告)日：2007-11-22

申请号：US11546170

申请日：2006-10-11

申请人： Gerald Smallegange ,  Dinesh Mohan ,  Marc Holness ,  Martin Charbonneau ,  Donald Ellis ,  Adrian Bashford

发明人： Gerald Smallegange ,  Dinesh Mohan ,  Marc Holness ,  Martin Charbonneau ,  Donald Ellis ,  Adrian Bashford

IPC分类号： H04J1/16 ,  H04L12/26

CPC分类号： H04L12/4641 ,  H04L12/1863 ,  H04L41/0677

摘要： A method and system for protecting a service available on a broadcast domain. A sub-domain is established within the broadcast domain. The sub-domain includes a group of nodes used to provide a communication path to the service. A primary sub-domain maintenance association and a back-up sub-domain maintenance association are monitored. The primary and sub-domain maintenance associations are a set of primary and back-up paths, respectively, representing connectivity between nodes acting as edge nodes in the sub-domain. A fault is detected within the primary sub-domain maintenance association and a switch to the back-up sub-domain maintenance association occurs.

摘要翻译： 一种用于保护广播域上可用服务的方法和系统。 在广播域内建立一个子域。 子域包括用于提供到服务的通信路径的一组节点。 监控主域维护关联和备份子域维护关联。 主域维护关联和子域维护关联是分别表示作为子域中的边缘节点的节点之间的连接的一组主和备用路径。 在主子域维护关联中检测到故障，并发生切换到备份子域维护关联。

公开(公告)号：US20050099952A1

公开(公告)日：2005-05-12

申请号：US10881296

申请日：2004-06-30

申请人： Dinesh Mohan ,  Marc Holness

发明人： Dinesh Mohan ,  Marc Holness

IPC分类号： H04L12/26

CPC分类号： H04L43/08 ,  H04L41/04 ,  H04L43/0852

摘要： Maintenance entities may be defined between customer and provider flow points to allow performance management to take place on an Ethernet network. The maintenance entities may be defined for access link, intra-domain, and inter-domain, and may be defined on a link or service basis. The maintenance entities may be used to monitor performance within a network or across networks, and may be used to monitor various performance parameters, such as frame loss, frame delay, frame delay variation, availability, errored frame seconds, service status, frame throughput, the number of frames transmitted, received or dropped, the status of a loopback interface, the amount of time a service has been unavailable, and many other parameters. Several management mechanisms may be used, and the measurements may be collected using a solicited collection method, in which a responses are required and collected, or an unsolicited collection method in which a response is not required.

摘要翻译： 可以在客户和供应商流量点之间定义维护实体，以允许在以太网上进行性能管理。 维护实体可以被定义用于接入链路，域内和域间，并且可以基于链路或服务来定义。 维护实体可以用于监视网络内或跨网络的性能，并且可以用于监视各种性能参数，例如帧丢失，帧延迟，帧延迟变化，可用性，错误帧秒，服务状态，帧吞吐量， 发送，接收或丢弃的帧数，环回接口的状态，服务不可用的时间量以及许多其他参数。 可以使用几种管理机制，并且可以使用其中需要和收集响应的请求收集方法或者不需要响应的非请求收集方法来收集测量结果。

公开(公告)号：US09059918B2

公开(公告)日：2015-06-16

申请号：US13561040

申请日：2012-07-29

申请人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

发明人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

IPC分类号： H04L12/26 ,  H04L29/06 ,  H04L12/24 ,  H04L12/751

CPC分类号： H04L43/10 ,  H04L41/12 ,  H04L45/02 ,  H04L63/00 ,  H04L69/00

摘要： An OAM link trace message is sent from a source node to a target node in a link state protocol controlled Ethernet network. The link trace message uses an 802.1ag format except, as a destination address, it uses either the unicast Ethernet MAC node ID of the target node or the multicast destination address of the service instance. Network topology verification in a link state protocol controlled Ethernet network checks the link state protocol database at a node to ascertain the control plane topology view of at least part of the network. One or more Ethernet OAM commands from the node are executed to ascertain the data plane topology view of the same part of the network. The control plane topology view of the network is compared to the data plane topology view of the network to see if they match. An error is flagged if they do not match.

摘要翻译： OAM链路跟踪消息从源节点发送到链路状态协议控制的以太网中的目标节点。 链路跟踪消息使用802.1ag格式，除了作为目的地址，它使用目标节点的单播以太网MAC节点ID或服务实例的组播目的地址。 链路状态协议控制的以太网网络中的网络拓扑验证检查节点处的链路状态协议数据库，以确定至少部分网络的控制平面拓扑视图。 执行来自节点的一个或多个以太网OAM命令以确定网络的相同部分的数据平面拓扑视图。 将网络的控制平面拓扑视图与网络的数据平面拓扑视图进行比较，看它们是否匹配。 如果错误不匹配，则会被标记。

公开(公告)号：US20110058483A1

公开(公告)日：2011-03-10

申请号：US12886630

申请日：2010-09-21

申请人： Dinesh Mohan ,  David Allan

发明人： Dinesh Mohan ,  David Allan

IPC分类号： H04L12/26

CPC分类号： H04L43/00 ,  H04L12/4625 ,  H04L41/046 ,  H04L41/0893 ,  H04L43/0811

摘要： Described is a process and system for providing an extensible forwarding plane data communications channel adapted to selectively support operations, administration and maintenance (OAM) activity within one or more different domains of an Ethernet transport network. The data communication channel is established using Ethernet protocol data units forwarded within the forwarding plane, between network elements. The Ethernet protocol data units can be Ethernet OAM frames modified to include an OpCode indicative of a maintenance communication channel. The OAM frames are generated at a selected one of the network elements (source), forwarded along the same network path as the Ethernet frames, and terminate at another network element (destination) associated with a maintenance level identified within the OAM frame. The source and destination network elements can reside on a domain boundary using the Ethernet OAM frames flowing therebetween to relay maintenance communications channel messages.

摘要翻译： 描述了用于提供可扩展的转发平面数据通信信道的过程和系统，其适于选择性地支持以太网传输网络的一个或多个不同域内的操作，管理和维护（OAM）活动。 使用在转发平面内转发的以太网协议数据单元在网元之间建立数据通信信道。 以太网协议数据单元可以是修改为包括指示维护通信信道的OpCode的以太网OAM帧。 在所选网络元件（源）中生成OAM帧，其沿着与以太网帧相同的网络路径转发，并终止于与OAM帧内识别的维护级别相关联的另一网络元件（目的地）。 源和目标网元可以使用在其间流动的以太网OAM帧来驻留在域边界上，以中继维护通信信道消息。

公开(公告)号：US07821949B2

公开(公告)日：2010-10-26

申请号：US11996561

申请日：2006-09-12

申请人： Dinesh Mohan ,  David Allan

发明人： Dinesh Mohan ,  David Allan

IPC分类号： G06F11/00

CPC分类号： H04L43/00 ,  H04L12/4625 ,  H04L41/046 ,  H04L41/0893 ,  H04L43/0811

摘要： Described is a process and system for providing an extensible forwarding plane data communications channel adapted to selectively support operations, administration and maintenance (OAM) activity within one or more different domains of an Ethernet transport network. The data communication channel is established using Ethernet protocol data units forwarded within the forwarding plane, between network elements. The Ethernet protocol data units can be Ethernet OAM frames modified to include an OpCode indicative of a maintenance communication channel. The OAM frames are generated at a selected one of the network elements (source), forwarded along the same network path as the Ethernet frames, and terminate at another network element (destination) associated with a maintenance level identified within the OAM frame. The source and destination network elements can reside on a domain boundary using the Ethernet OAM frames flowing therebetween to relay maintenance communications channel messages.

摘要翻译： 描述了用于提供可扩展的转发平面数据通信信道的过程和系统，其适于选择性地支持以太网传输网络的一个或多个不同域内的操作，管理和维护（OAM）活动。 使用在转发平面内转发的以太网协议数据单元在网元之间建立数据通信信道。 以太网协议数据单元可以是修改为包括指示维护通信信道的OpCode的以太网OAM帧。 在所选网络元件（源）中生成OAM帧，其沿着与以太网帧相同的网络路径转发，并终止于与OAM帧内识别的维护级别相关联的另一网络元件（目的地）。 源和目标网元可以使用在其间流动的以太网OAM帧来驻留在域边界上，以中继维护通信信道消息。

公开(公告)号：US20100226376A1

公开(公告)日：2010-09-09

申请号：US12785527

申请日：2010-05-24

申请人： Dinesh Mohan ,  Hamid Ould Brahim

发明人： Dinesh Mohan ,  Hamid Ould Brahim

IPC分类号： H04L12/56

CPC分类号： H04L45/50 ,  H04L12/2856 ,  H04L12/2859 ,  H04L12/4633 ,  H04L12/4658 ,  H04L12/4662

摘要： Frames of customer traffic may be encapsulated by adding Mac-in-Mac (MiM) encapsulation fields for transportation of the frames over a portion of provider network. The MiM encapsulated traffic may be further encapsulated using VPLS by adding VPLS encapsulation fields for transportation of the frames over another portion of the provider network. The MiM encapsulations use provider network MAC addresses which enables VPLS MAC learning to occur using provider network MAC address space. MiM tunnels are mapped to VPLS service instances which are assigned pseudowire tags for transportation over the VPLS portion of provider network. The MiM header is retained when the MiM encapsulated frames are transported over the VPLS portion of the provider network. As VPLS frames exit the core network, the VPLS encapsulation fields are removed to extract the original MiM encapsulated frames for further transportation over the MiM portion of the provider network.

摘要翻译： 客户流量的框架可以通过添加Mac-in-Mac（MiM）封装字段来封装，用于在提供商网络的一部分上传输帧。 可以通过添加用于在提供商网络的另一部分上传送帧的VPLS封装字段来使用VPLS进一步封装MiM封装的流量。 MiM封装使用提供商网络MAC地址，使得可以使用提供商网络MAC地址空间进行VPLS MAC学习。 MiM隧道映射到VPLS服务实例，VPLS服务实例被分配伪线标签，用于通过供应商网络的VPLS部分进行传输。 当MiM封装的帧通过提供商网络的VPLS部分传输时，MiM头部被保留。 由于VPLS帧离开核心网络，VPLS封装字段被删除，以提取原始的MiM封装帧，以便在提供商网络的MiM部分进一步传输。

公开(公告)号：US20090059800A1

公开(公告)日：2009-03-05

申请号：US12006291

申请日：2007-12-31

申请人： Dinesh Mohan

发明人： Dinesh Mohan

IPC分类号： G06F11/00

CPC分类号： H04L41/0659 ,  H04L12/462 ,  H04L41/00 ,  H04L41/06 ,  H04L41/0668 ,  H04L41/0893 ,  H04L43/0811 ,  H04L45/122 ,  H04L45/22 ,  H04L45/48

摘要： A control protocol is run in the interconnect region between network domains so that the interconnect region may be managed using a separate control plane. According to an embodiment of the invention, a spanning tree protocol is used to establish a separate spanning tree within the interconnect region. To avoid loop formation within the interconnect region, links interconnecting adjacent edge nodes that are part of the interconnect region and which belong to a given domain are allowed to pass control frames but not data frames. OAM may be used detect link failure of a link between adjacent nodes on a given domain.

摘要翻译： 控制协议在网络域之间的互连区域中运行，使得可以使用单独的控制平面来管理互连区域。 根据本发明的实施例，生成树协议用于在互连区域内建立单独的生成树。 为了避免互连区域内的环路形成，互连作为互连区域一部分并且属于给定域的相邻边缘节点的链路被允许传递控制帧而不是数据帧。 可以使用OAM在给定域上的相邻节点之间的链路的检测链路故障。

公开(公告)号：US08918538B2

公开(公告)日：2014-12-23

申请号：US13173807

申请日：2011-06-30

申请人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

发明人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

IPC分类号： G06F15/173 ,  H04L12/26 ,  H04L29/06

CPC分类号： H04L43/10 ,  H04L41/12 ,  H04L45/02 ,  H04L63/00 ,  H04L69/00

摘要： Ethernet OAM MEPs are automatically configured in a link state protocol controlled Ethernet network. A node operating in the link state protocol controlled Ethernet network receives a Link State PDU (LSP) containing a TLV having a MEP associated with the Ethernet MAC node ID of a second node in the link state protocol controlled Ethernet network, where the path between the first and second node includes a plurality of links. The node updates a forwarding table to indicate an association between the MEP ID and a Ethernet MAC node ID of the second node. An Ethernet OAM maintenance endpoint is produced in a link state protocol controlled Ethernet network by hashing a Sys-ID to produce a MEP; storing the MEP in a TLV; and forwarding the TLV over the link state protocol controlled Ethernet network in an LSP.

摘要翻译： 以太网OAM MEP自动配置在链路状态协议控制的以太网中。 在链路状态协议控制的以太网中操作的节点接收链路状态PDU（LSP），链路状态PDU（LSP）包含具有与链路状态协议控制的以太网中的第二节点的以太网MAC节点ID相关联的MEP的TLV， 第一和第二节点包括多个链接。 节点更新转发表以指示MEP ID与第二节点的以太网MAC节点ID之间的关联。 在链路状态协议控制的以太网网络中产生以太网OAM维护端点，通过散列Sys-ID产生MEP; 将MEP存储在TLV中; 并通过链路状态协议控制的以太网在LSP中转发TLV。

公开(公告)号：US08588237B2

公开(公告)日：2013-11-19

申请号：US13287181

申请日：2011-11-02

申请人： Dinesh Mohan ,  Hamid Ould Brahim

发明人： Dinesh Mohan ,  Hamid Ould Brahim

IPC分类号： H04L12/28

CPC分类号： H04L45/50 ,  H04L12/2856 ,  H04L12/2859 ,  H04L12/4633 ,  H04L12/4658 ,  H04L12/4662

摘要： Frames of customer traffic may be encapsulated by adding Mac-in-Mac (MiM) encapsulation fields for transportation of the frames over a portion of provider network. The MiM encapsulated traffic may be further encapsulated using VPLS by adding VPLS encapsulation fields for transportation of the frames over another portion of the provider network. The MiM encapsulations use provider network MAC addresses which enables VPLS MAC learning to occur using provider network MAC address space. MiM tunnels are mapped to VPLS service instances which are assigned pseudowire tags for transportation over the VPLS portion of provider network. The MiM header is retained when the MiM encapsulated frames are transported over the VPLS portion of the provider network. As VPLS frames exit the core network, the VPLS encapsulation fields are removed to extract the original MiM encapsulated frames for further transportation over the MiM portion of the provider network.

摘要翻译： 客户流量的框架可以通过添加Mac-in-Mac（MiM）封装字段来封装，用于在提供商网络的一部分上传输帧。 可以使用VPLS进一步封装MiM封装的流量，通过添加用于在提供商网络的另一部分上传输帧的VPLS封装字段。 MiM封装使用提供商网络MAC地址，使得可以使用提供商网络MAC地址空间进行VPLS MAC学习。 MiM隧道映射到VPLS服务实例，VPLS服务实例被分配伪线标签，用于通过供应商网络的VPLS部分进行传输。 当MiM封装的帧通过提供商网络的VPLS部分传输时，MiM头部被保留。 由于VPLS帧离开核心网络，VPLS封装字段被删除，以提取原始的MiM封装帧，以便在提供商网络的MiM部分进一步传输。

公开(公告)号：US08520530B2

公开(公告)日：2013-08-27

申请号：US13269724

申请日：2011-10-10

申请人： Dinesh Mohan

发明人： Dinesh Mohan

IPC分类号： H04J1/16

CPC分类号： H04L43/0829 ,  H04L41/5003 ,  H04L41/5012 ,  H04L43/00 ,  H04L43/0847 ,  H04L43/0852 ,  H04L43/0864 ,  H04L43/087 ,  H04L43/106 ,  H04L43/16

摘要： Maintenance entities may be defined between customer and provider flow points to allow performance management to take place on an Ethernet network. The maintenance entities may be defined for access link, intra-domain, and inter-domain, and may be defined on a link or service basis. Performance parameters, including availability metrics, may be collected for the maintenance entities. The provision of such availability metrics in an Ethernet based solution to facilitate consistency of service management and operations for carriers transitioning to the Ethernet solution.

摘要翻译： 可以在客户和供应商流量点之间定义维护实体，以允许在以太网上进行性能管理。 维护实体可以被定义用于接入链路，域内和域间，并且可以基于链路或服务来定义。 可以为维护实体收集性能参数，包括可用性度量。 在基于以太网的解决方案中提供这种可用性度量，以便于服务管理的一致性和运营商过渡到以太网解决方案的操作。