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。

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：US20080172497A1

公开(公告)日：2008-07-17

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

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实现的以太网相互连接。 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：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：US20060031482A1

公开(公告)日：2006-02-09

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： G06F15/173 ,  G06F11/00

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。