公开(公告)号：US08504727B2

公开(公告)日：2013-08-06

申请号：US12016190

申请日：2008-01-17

申请人： Dinesh Mohan ,  Gerald Smallegange ,  Paul Unbehagen ,  Nigel Bragg

发明人： Dinesh Mohan ,  Gerald Smallegange ,  Paul Unbehagen ,  Nigel Bragg

IPC分类号： G06F15/16 ,  H04J3/16

CPC分类号： H04L12/66 ,  H04L12/4616 ,  H04L12/4633 ,  H04L12/4658 ,  H04L12/4662 ,  H04L45/502 ,  H04L2212/00

摘要： MPLS networks offering PW or VPLS services may be interconnected with Ethernet networks implemented according to 802.1ah or 802.1Qay. The MPLS network may be a core and offer services to the Ethernet access networks, or vise-versa. Additionally, a mixture of different types of access networks may be interconnected by an MPLS core or an Ethernet core. Both network interworking and service interworking are provided. OAM fault detection may be implemented via maintenance entities extending across the network or end to end depending on the combination of networks and services offered by the networks.

摘要翻译： 提供PW或VPLS服务的MPLS网络可以与根据802.1ah或802.1Qay实现的以太网互连。 MPLS网络可能是核心，并向以太网接入网提供服务，反之亦然。 此外，不同类型的接入网络的混合可以由MPLS核心或以太网核心互连。 提供网络互通和服务互通。 OAM故障检测可以通过基于由网络提供的网络和服务的组合而跨越网络或端对端的维护实体来实现。

公开(公告)号：US08144715B2

公开(公告)日：2012-03-27

申请号：US12104598

申请日：2008-04-17

申请人： Hamid Ould Brahim ,  David Allan ,  Dinesh Mohan

发明人： Hamid Ould Brahim ,  David Allan ,  Dinesh Mohan

IPC分类号： H04L12/28

CPC分类号： H04L12/66 ,  H04L12/4633 ,  H04L12/465 ,  H04L12/4654 ,  H04L12/4658

摘要： To allow seamless interworking between an 802.1ah service instance (ISID) and a VPLS service instance, the AGI value used to signal the setup of the pseudowire portion of the VPLS may carry the ISID value of an associated 802.1ah service instance. This allows the service instance to be identified end-to-end across the Ethernet and VPLS networks using the same value without modifying how the MPLS network operates. The VPLS network will use AGI/AII signaling to set up pseudowires on the MPLS network, but instead of using an AGI value assigned by the MPLS network, the AGI value that is assigned will be taken from the ISID value of the Ethernet frame or from ISIDs registered by the Ethernet network. The AGI message may be given a new type value indicating that the AGI message carries a value that corresponds to the ISID value on an attached Ethernet network. Alternatively, an existing AGI message type may be used to carry the ISID value, and a second type field may be used to indicate that the AGI contains an ISID value.

摘要翻译： 为了允许802.1ah服务实例（ISID）和VPLS服务实例之间的无缝互通，用于发信号通知VPLS伪线部分的AGI值可以携带相关的802.1ah服务实例的ISID值。 这允许使用相同的值在跨越以太网和VPLS网络的端到端地识别服务实例，而无需修改MPLS网络如何工作。 VPLS网络将使用AGI / AII信令在MPLS网络上建立伪线，而不是使用由MPLS网络分配的AGI值，所分配的AGI值将取自以太网帧的ISID值或从 以太网注册的ISID。 AGI消息可以被给予新的类型值，指示AGI消息携带对应于所连接的以太网上的ISID值的值。 或者，可以使用现有的AGI消息类型来携带ISID值，并且可以使用第二类型字段来指示AGI包含ISID值。

公开(公告)号：US20110255417A1

公开(公告)日：2011-10-20

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： H04L12/26

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：US20090175176A1

公开(公告)日：2009-07-09

申请号：US12250266

申请日：2008-10-13

申请人： Dinesh Mohan

发明人： Dinesh Mohan

IPC分类号： H04J1/16 ,  H04L12/28

CPC分类号： H04L12/4641 ,  H04L45/04 ,  H04L45/16 ,  H04L45/22 ,  H04L45/28 ,  H04L45/48 ,  H04L45/66

摘要： The present invention relates to techniques for allowing one or more edge nodes in a backbone network to quickly and efficiently switch traffic delivery from a first virtual network to a second virtual network in response to a failure occurring in association with the first virtual network. In certain embodiments, an edge node is capable of independently detecting that a failure has occurred on the first virtual network and quickly transitioning from the first virtual network to the second virtual network for receiving or delivering traffic. Upon detecting the failure in the first virtual network, the edge node will begin delivering traffic over the second virtual network. If control messages are not already being provided over the second network, the edge node may begin providing the control messages over the second virtual network.

摘要翻译： 本发明涉及用于允许骨干网络中的一个或多个边缘节点响应于与第一虚拟网络相关联的故障而快速有效地切换从第一虚拟网络到第二虚拟网络的业务传送的技术。 在某些实施例中，边缘节点能够独立地检测在第一虚拟网络上发生故障并且从第一虚拟网络快速转换到用于接收或传送业务的第二虚拟网络。 在检测到第一虚拟网络中的故障时，边缘节点将开始通过第二虚拟网络传送流量。 如果控制消息尚未在第二网络上提供，则边缘节点可以开始通过第二虚拟网络提供控制消息。

公开(公告)号：US07152115B2

公开(公告)日：2006-12-19

申请号：US10191660

申请日：2002-07-09

申请人： Hamid H. Ould Brahim ,  Dinesh Mohan ,  Vasile Radoaca ,  Michael Chen

发明人： Hamid H. Ould Brahim ,  Dinesh Mohan ,  Vasile Radoaca ,  Michael Chen

IPC分类号： G06F15/173 ,  H04L12/66 ,  G01R31/08

CPC分类号： H04L45/00 ,  H04L12/4675 ,  H04L45/50 ,  Y02D30/32

摘要： A network can be organized for providing virtual private network services to customers into two regions. A network core for providing layer 2 transport and an associated number of logical provider edges. Each logical provider edge is partitioned into first and second portions. The first portion provides virtual private network services to customers. The second portion works with the core network to communicate with any other logical provider edge within the network. The first portion designated as the PE-Edge includes a group of functions such as a function for configuring optical Ethernet layer 2 virtual private network service, a function for service labeling, a function for ingress traffic management, and a function for information exchange between local VPN and core VPN. The second portion designated as PE-Core includes a group of functions such as a function for distributing service labels, a function for distributing information on transport tunnels, a function for information exchange between local and core VPN. Within the logical provider edge or Logical PE, the PE-Edge and PE-Core communicate via a layer 2 network.

公开(公告)号：US08854982B2

公开(公告)日：2014-10-07

申请号：US12006291

申请日：2007-12-31

申请人： Dinesh Mohan

发明人： Dinesh Mohan

IPC分类号： H04J3/12 ,  H04L12/753 ,  H04L12/46 ,  H04L12/707 ,  H04L12/24

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：US08483229B2

公开(公告)日：2013-07-09

申请号：US13110380

申请日：2011-05-18

申请人： Dinesh Mohan ,  Florin Balus

发明人： Dinesh Mohan ,  Florin Balus

IPC分类号： H04L12/28

CPC分类号： H04L45/68 ,  H04L12/462 ,  H04L12/4633 ,  H04L12/465 ,  H04L45/50 ,  H04L45/74

摘要： Described are methods and communications network for carrying pseudowires over packet-switched network. A communication network includes a packet-switched network (PSN), a first provider edge (PE) device in communication with a second PE device through the PSN, and a pseudowire (PW) established between the PE devices for emulating a service across the PSN. The PW has a Virtual Circuit Connection Verification (VCCV) control channel that carries an Ethernet Operations, Administration, and Maintenance (OAM) message. In some embodiments, various data plane encapsulation formats enable a PW to emulate an Ethernet or a non-Ethernet service over an Ethernet PSN. Each encapsulation format includes an Ethernet tunnel header and a PW header that encapsulates an Ethernet or non-Ethernet payload.

公开(公告)号：US08422500B2

公开(公告)日：2013-04-16

申请号：US11169718

申请日：2005-06-30

申请人： Sameh Rabie ,  Osama Aboul-Magd ,  Dinesh Mohan

发明人： Sameh Rabie ,  Osama Aboul-Magd ,  Dinesh Mohan

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/30 ,  H04L12/4645 ,  H04L45/04 ,  H04L45/50 ,  H04L47/10 ,  H04L47/2408 ,  H04L47/2433 ,  H04L47/2491 ,  H04L47/32

摘要： The two types of virtual local area networks (VLANs) may be defined: p-bits-Inferred-scheduling class VLAN (p-VLAN); and VLAN-ID-Only-Inferred-scheduling class VLANs (v-VLAN). As such, upon receipt of an Ethernet frame, the type of VLAN associated with the Ethernet frame may be determined. The type of VLAN provides the receiving node with an indication of a method of determining a scheduling class. A p-VLAN supports multiple scheduling classes. For a p-VLAN, the scheduling class and drop precedence for the received Ethernet frame may be determined based on a “service map” that describes the relationship between the p-bits and forwarding treatment. A v-VLAN supports a single scheduling class. As such, the scheduling class for a received Ethernet frame may be determined based on the VLAN-ID of the received Ethernet frame. The described VLAN QoS information may be configured or signaled across the network. Advantageously, the methods may be applied in connectionless, connection-oriented and path-oriented Ethernet networks.

摘要翻译： 可以定义两种类型的虚拟局域网（VLAN）：p-bits-Inferred-scheduling class VLAN（p-VLAN）; 和VLAN-ID-Only-Inferred-scheduling类VLAN（v-VLAN）。 因此，在接收到以太网帧时，可以确定与以太网帧相关联的VLAN的类型。 VLAN的类型为接收节点提供了确定调度类的方法的指示。 p-VLAN支持多个调度类。 对于p-VLAN，可以基于描述p位和转发处理之间的关系的服务映射来确定所接收的以太网帧的调度类别和丢弃优先级。 v-VLAN支持单个调度类。 因此，可以基于接收的以太网帧的VLAN-ID来确定接收到的以太网帧的调度类。 所描述的VLAN QoS信息可以通过网络配置或发信号通知。 有利地，该方法可以应用于无连接，面向连接和面向路由的以太网。

公开(公告)号：US20090234969A1

公开(公告)日：2009-09-17

申请号：US12249944

申请日：2008-10-12

申请人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

发明人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

IPC分类号： G06F15/173

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：US20090232006A1

公开(公告)日：2009-09-17

申请号：US12249946

申请日：2008-10-12

申请人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

发明人： Dinesh Mohan ,  Paul Unbehagen ,  Srikanth Keesara

IPC分类号： H04L12/26

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 using 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. A method of 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. It then executes one or more Ethernet OAM commands from the node 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。 使用802.1ag格式的链路跟踪消息，除了目的地址之外，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。 在链路状态协议控制的以太网中网络拓扑验证的方法检查节点处的链路状态协议数据库，以确定网络的至少一部分的控制平面拓扑视图。 然后从节点执行一个或多个以太网OAM命令，以确定网络的同一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。