公开(公告)号：US08787147B2

公开(公告)日：2014-07-22

申请号：US12907165

申请日：2010-10-19

申请人： Ross Caird ,  Michael Watford ,  Onder Yazar ,  Marc Holness

发明人： Ross Caird ,  Michael Watford ,  Onder Yazar ,  Marc Holness

IPC分类号： H04L12/437

CPC分类号： H04L45/22 ,  H04L41/0213 ,  H04L41/0663 ,  H04L43/0811 ,  H04L45/245 ,  H04L45/28 ,  Y02D50/30

摘要： The present disclosure provides protection systems and methods for Ethernet ports. In particular, the present invention may provide a form of facility protection for any two facilities, located on any two cards. The facilities are provisioned as a protected pair and using automatic ITU-T Y.1731 control frames for control. In an exemplary embodiment, provisioning includes creation of an L2 protection service and associating it to a pair of facilities. One facility is identified as a working facility and the other as a protection facility. Under normal conditions (i.e., no facility fault), the working facility is in an active state and not conditioning while the protection facility is in a standby state and transmitting conditioning to subtending equipment. If a facility fault is detected at the working facility, then the working facility transmits condition Remote Fault (RF) and the protection facility removes it's transmit conditioning and becomes the active facility.

摘要翻译： 本公开提供了用于以太网端口的保护系统和方法。 特别地，本发明可以为位于任何两张卡上的任何两个设施提供一种设施保护形式。 这些设施被配置为受保护对，并使用自动的ITU-T Y.1731控制帧进行控制。 在示例性实施例中，供应包括创建L2保护服务并将其与一对设施相关联。 一个设施被确定为工作设施，另一个设施被确定为保护设施。 在正常情况下（即没有设备故障），工作设备处于活动状态，而不是在保护设备处于待机状态时进行调理，并且将调理传送到对准设备。 如果在工作场所检测到设备故障，则工作设备传送条件远程故障（RF），保护设备将其发送调理移除，成为主动设备。

公开(公告)号：US08369330B2

公开(公告)日：2013-02-05

申请号：US11479694

申请日：2006-06-30

申请人： David Allan ,  Nigel Bragg ,  Marc Holness ,  Robert Friskney ,  Simon Parry

发明人： David Allan ,  Nigel Bragg ,  Marc Holness ,  Robert Friskney ,  Simon Parry

IPC分类号： H04L12/28

CPC分类号： H04L49/604 ,  H04L12/4662 ,  H04L12/66 ,  H04L45/22 ,  H04L45/28

摘要： An Ethernet virtual switched sub-network (VSS) is implemented as a virtual hub and spoke architecture overlaid on hub and spoke connectivity built of a combination of Provider Backbone Transport (spokes) and a provider backbone bridged sub-network (hub). Multiple VSS instances are multiplexed over top of the PBT/PBB infrastructure. A loop free resilient Ethernet carrier network is provided by interconnecting Provider Edge nodes through access sub-networks to Provider Tandems to form Provider Backbone Transports spokes with a distributed switch architecture of the Provider Backbone Bridged hub sub-network. Provider Backbone transport protection groups may be formed from the Provider Edge to diversely homed Provider Tandems by defining working and protection trunks through the access sub-network. The Provider Backbone Transport trunks are Media Access Control (MAC) addressable by the associated Provider Edge address or by a unique address associated with the protection group in the Provider Backbone Bridged network domain.

公开(公告)号：US08243743B2

公开(公告)日：2012-08-14

申请号：US12421227

申请日：2009-04-09

申请人： David Wright Martin ,  Marc Holness

发明人： David Wright Martin ,  Marc Holness

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/28 ,  H04L12/4625 ,  H04L45/16 ,  H04L45/22

摘要： A method and system provide in-band protection switch signaling in a communication system arranged as a point-to-multipoint tree. The point-to-multipoint tree includes a root node communicatively coupled to a plurality of leaf nodes through both a working link and a protection link. Data is transferred through a current link of the point-to-multipoint tree. The current link is either the working link or the protection link. A fault is detected in the current link in the point-to-multipoint tree. Each leaf node in the point-to-multipoint tree is notified of the fault using the current link. Upon receiving the notification, the root node and each leaf node switch to the other link of the working link and the protection link.

摘要翻译： 一种方法和系统在布置为点对多点树的通信系统中提供带内保护交换机信令。 点对多点树包括通过工作链路和保护链路通信地耦合到多个叶节点的根节点。 数据通过点对多点树的当前链路传输。 当前链接是工作链路或保护链路。 在点对多点树中的当前链路中检测到故障。 点对多点树中的每个叶节点都使用当前链接通知故障。 收到通知后，根节点和每个叶节点切换到工作链路​​和保护链路的另一个链路。

公开(公告)号：US08149692B2

公开(公告)日：2012-04-03

申请号：US12347362

申请日：2008-12-31

申请人： Marc Holness ,  Bashar Abdullah ,  Marc Andre Rochon

发明人： Marc Holness ,  Bashar Abdullah ,  Marc Andre Rochon

IPC分类号： H04J3/14 ,  G01R31/08 ,  H04L12/28

CPC分类号： H04L12/437 ,  H04L45/28

摘要： A method automatically discovers a topology of a communication network ring. The ring includes a plurality of nodes. Each node includes a first port and a second port. A ring topology request or a response to the ring topology request is received from at least one node on the ring. The ring topology request or the response to the ring topology request includes an identification of the at least one node and an indication of a hop count needed to reach the at least one node. The ring topology request or the response to the ring topology request is forwarded to at least one neighboring node on the ring through the first port. The topology is determined based on the identification of the at least one node, the hop count, and an identification of the first port.

摘要翻译： 一种方法自动发现通信网络环的拓扑。 该环包括多个节点。 每个节点包括第一端口和第二端口。 从环上的至少一个节点接收到环形拓扑请求或对环形拓扑请求的响应。 环形拓扑请求或对环形拓扑请求的响应包括至少一个节点的标识和到达至少一个节点所需的跳数的指示。 环形拓扑请求或对环形拓扑请求的响应通过第一个端口转发到环上的至少一个相邻节点。 基于至少一个节点的标识，跳数和第一端口的标识来确定拓扑。

公开(公告)号：US08018841B2

公开(公告)日：2011-09-13

申请号：US12344362

申请日：2008-12-26

申请人： Marc Holness ,  Abdullah Bashar

发明人： Marc Holness ,  Abdullah Bashar

IPC分类号： G06F11/22

CPC分类号： H04L12/437

摘要： Interworking an Ethernet Ring network with an Ethernet network with traffic engineered trunks (PBT network) enables traffic engineered trunks to be dual homed to the Ethernet ring network to enable for protection switching between active and backup trunk paths in the PBT network. In one embodiment, the active path will terminate at a first bridge node on the Ethernet ring network and the backup path will terminate at a second bridge node on the Ethernet ring network. Trunk state information is exchanged between the bridge nodes to enable the bridge nodes to determine which of the active and backup paths should be used to forward data on the trunk. Upon a change in trunk state, a flush message is transmitted on the Ethernet ring network to enable the nodes on the Ethernet ring network to relearn the path to the new responsible bridge node.

摘要翻译： 将以太网环网与具有流量工程中继线（PBT网络）的以太网环网互通使得流量工程中继线能够双重归属到以太网环网，以实现PBT网络中主备和中继路径之间的保护倒换。 在一个实施例中，活动路径将终止在以太网环网上的第一网桥节点处，并且备用路径将终止在以太网环网上的第二网桥节点处。 中继线状态信息在网桥节点之间进行交换，以使桥接节点能够确定哪个主动和备用路径应用于在中继线上转发数据。 在中继状态发生变化时，以太网环网上会发送刷新消息，使以太网环网上的节点重新获取新负责的桥接节点的路径。

公开(公告)号：US20050099955A1

公开(公告)日：2005-05-12

申请号：US10880867

申请日：2004-06-30

申请人： Dinesh Mohan ,  Timothy Mancour ,  Marc Holness

发明人： Dinesh Mohan ,  Timothy Mancour ,  Marc Holness

IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

CPC分类号： H04L43/0811 ,  H04L1/24 ,  H04L12/462 ,  H04L41/0677 ,  H04L43/10

摘要： Ethernet OAM may be used to trace a path on an Ethernet network. If the path reaches the destination, there is no fault. If the path doesn't reach the destination, the network element farthest along the path is adjacent the fault. The path trace may be used from both ends of a given path to confirm the presence of a single fault or to determine the likelihood of multiple faults on the path. A path trace Ethernet OAM frame may be issued on the network with instructions that network elements with knowledge of a destination address should respond. If a network element knows the destination address, the receiving network element responds to the initiating network element with a unicast OAM frame and forwards the OAM frame if possible. The sequence of unicast response frames allows the initiating network element to build a path through the network toward the destination element and identify where the path stops.

摘要翻译： 以太网OAM可用于跟踪以太网上的路径。 如果路径到达目的地，则没有故障。 如果路径没有到达目的地，则沿路径最远的网络元素与故障相邻。 可以从给定路径的两端使用路径跟踪，以确认单个故障的存在或确定路径上多个故障的可能性。 可以在网络上发出路径跟踪以太网OAM帧，其指令是具有目的地地址知识的网络元素应该响应。 如果网元知道目的地址，则接收网络单元用单播OAM帧对发起的网元进行响应，如果可能，转发OAM帧。 单播响应帧的顺序允许发起网络元件通过网络向目的地元素建立路径，并且识别路径停止的位置。

公开(公告)号：US20050099949A1

公开(公告)日：2005-05-12

申请号：US10880876

申请日：2004-06-30

申请人： Dinesh Mohan ,  Timothy Mancour ,  Marc Holness

发明人： Dinesh Mohan ,  Timothy Mancour ,  Marc Holness

IPC分类号： G01R31/08 ,  H04L12/56

CPC分类号： H04L47/10

摘要： Ethernet OAM domains may be defined by defining reference points on the Ethernet network and using the reference points to insert and extract Ethernet OAM flows. The reference points may be network elements at the edge of a provider's domain, customer elements, or network elements configured to perform OAM flow handoffs between domains. By defining OAM multicast addresses and OAM flow identifiers, and allowing the reference points to be addressed by the multicast address and filtering to be performed by the reference points based on the OAM flow identifiers, OAM flows may be defined on the network. For example, customer-customer OAM flows may be defined, intra-provider and inter-provider OAM flows may be defined, and various segment OAM flows may be defined. An OAM frame format is provided to enable the OAM flows to be carried in a conventional Ethernet network.

摘要翻译： 可以通过在以太网上定义参考点并使用参考点插入和提取以太网OAM流来定义以太网OAM域。 参考点可以是提供商域的边缘处的网络元件，客户元素或被配置为在域之间执行OAM流切换的网络元件。 通过定义OAM多播地址和OAM流标识符，并且允许基于OAM流标识符的多播地址和由参考点执行的过滤来引用参考点，可以在网络上定义OAM流。 例如，可以定义客户 - 客户OAM流，可以定义内部提供商和提供商之间的OAM流，并且可以定义各种分段OAM流。 提供OAM帧格式以使得OAM流能够在传统的以太网中承载。

公开(公告)号：US08862943B2

公开(公告)日：2014-10-14

申请号：US11137015

申请日：2005-05-25

申请人： Dinesh Mohan ,  Marc Holness

发明人： Dinesh Mohan ,  Marc Holness

IPC分类号： G06F11/00 ,  H04L12/46 ,  H04L12/24

CPC分类号： G06F11/0772 ,  H04L12/4641 ,  H04L41/0631 ,  H04L41/0663 ,  H04L41/0677 ,  H04L41/0686 ,  Y02D30/30

摘要： Connectivity fault notification is provided by generating an alarm indication signal at a device that is logically adjacent to the fault, and forwarding the alarm indication signal upward through various levels to at least one client level entity. The alarm indication signal may be suppressed at any level for a service instance if service is restored at that level, or if a protection path prevents disruption of the service instance at that level, or auto-suppressed at an originating node based on number of times transmitted or elapsed time. The alarm indication signal may include a point of failure indicator such as the MAC address of the device that generates the alarm indication signal, or a failed resource identity such as an IEEE 802.1AB LLDP MAC Service Access Point (“MSAP”). Further, the alarm indication signal may be employed to trigger use of the protection path.

摘要翻译： 通过在与故障逻辑上相邻的设备处产生报警指示信号，并将报警指示信号向上通过各种级别转发到至少一个客户端级实体来提供连接故障通知。 如果服务在该级别被恢复，或者如果保护路径防止在该级别的服务实例的中断或者在始发节点处基于次数自动抑制，则可以在服务实例的任何级别上抑制警报指示信号 传送或消逝时间。 报警指示信号可以包括诸如生成报警指示信号的设备的MAC地址或诸如IEEE 802.1AB LLDP MAC服务接入点（“MSAP”）之类的故障资源标识的故障点指示器。 此外，可以采用报警指示信号来触发保护路径的使用。

公开(公告)号：US08797845B2

公开(公告)日：2014-08-05

申请号：US12743107

申请日：2008-11-17

申请人： Jeong-Dong Ryoo ,  June-Koo Rhee ,  Bheom-Soon Joo ,  Jin-Sung Im ,  Zahir Uddin Ahmad ,  Yang Yang ,  Marc Holness

发明人： Jeong-Dong Ryoo ,  June-Koo Rhee ,  Bheom-Soon Joo ,  Jin-Sung Im ,  Zahir Uddin Ahmad ,  Yang Yang ,  Marc Holness

IPC分类号： H04J1/16 ,  H04L1/00 ,  H04L12/26 ,  H04L12/28 ,  H04L12/16 ,  H04L12/437

CPC分类号： H04L12/437 ,  H04L12/18 ,  H04L12/423 ,  H04L41/0659 ,  H04L41/26 ,  H04L45/22 ,  H04L45/28

摘要： Provided is a failure recovery method in a non-revertive mode of an Ethernet ring network. In an Ethernet ring network, link priorities between nodes or node priorities are determined based on media access control (MAC) addresses and the nodes having blocked ports are determined after failures are recovered from based on the priorities so that the blocked ports can be distributed.

摘要翻译： 提供以太网环网的非回复模式的故障恢复方法。 在以太网环网中，基于媒体访问控制（MAC）地址确定节点或节点优先级之间的链路优先级，并根据优先级从故障恢复后确定具有阻塞端口的节点，从而可以分发阻塞端口。

公开(公告)号：US08792509B2

公开(公告)日：2014-07-29

申请号：US13549627

申请日：2012-07-16

申请人： David Wright Martin ,  Marc Holness

发明人： David Wright Martin ,  Marc Holness

IPC分类号： H04L12/28

CPC分类号： H04L45/28 ,  H04L12/4625 ,  H04L45/16 ,  H04L45/22

摘要： A method and system provide in-band protection switch signaling in a communication system arranged as a point-to-multipoint tree. The point-to-multipoint tree includes a root node communicatively coupled to a plurality of leaf nodes through both a working link and a protection link. Data is transferred through a current link of the point-to-multipoint tree. The current link is either the working link or the protection link. A fault is detected in the current link in the point-to-multipoint tree. Each leaf node in the point-to-multipoint tree is notified of the fault using the current link. Upon receiving the notification, the root node and each leaf node switch to the other link of the working link and the protection link.

摘要翻译： 一种方法和系统在布置为点对多点树的通信系统中提供带内保护交换机信令。 点对多点树包括通过工作链路和保护链路通信地耦合到多个叶节点的根节点。 数据通过点对多点树的当前链路传输。 当前链接是工作链路或保护链路。 在点对多点树中的当前链路中检测到故障。 点对多点树中的每个叶节点都使用当前链接通知故障。 收到通知后，根节点和每个叶节点切换到工作链路​​和保护链路的另一个链路。