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51. 发明申请

US20100274924A1 Method and Apparatus for Accommodating Duplicate MAC Addresses 失效
标题翻译：用于容纳重复MAC地址的方法和装置
公开(公告)号：US20100274924A1
公开(公告)日：2010-10-28
申请号：US12429210
申请日：2009-04-24
申请人： David Allan , Nigel Bragg
发明人： David Allan , Nigel Bragg
IPC分类号： G06F15/16 , G06F15/173
CPC分类号： H04L61/2015 , H04L12/2881 , H04L29/12264 , H04L29/12839 , H04L29/12933 , H04L61/2046 , H04L61/6022 , H04L61/6068
摘要： Each access node is associated with one or more IP subnets with a preferred default subnet. Each subnet is instantiated as a unique virtual Ethernet broadcast domain. As client nodes register on the communication network, they will dynamically try to obtain an IP address for use on the communication network. As part of this process, the MAC address of the client node will be checked to ensure that it is not a duplicate of another MAC address associated with another client node that has already been assigned an IP address from the default subnet. When duplicate MAC addresses are detected, the device with the duplicate MAC address will be assigned an IP address from a different subnet so that more than one client device with the same MAC address are not associated with the same subnet. In one embodiment, a DHCP server may implement the process of checking for duplicate MAC addresses. In an Ethernet context, different IP subnet prefixes may be mapped to different S-VID values so that the different subnets are implemented as different VLANs within the Ethernet network.
摘要翻译：每个访问节点与一个或多个具有优选默认子网的IP子网相关联。每个子网被实例化为唯一的虚拟以太网广播域。随着客户端节点在通信网络中的注册，他们将动态地尝试获取在通信网络上使用的IP地址。作为此过程的一部分，将检查客户端节点的MAC地址，以确保它不是与已从默认子网分配了IP地址的另一个客户端节点关联的另一个MAC地址重复。当检测到重复的MAC地址时，具有重复MAC地址的设备将被分配来自不同子网的IP地址，以便具有相同MAC地址的多个客户端设备不与同一个子网相关联。在一个实施例中，DHCP服务器可以实现检查重复的MAC地址的过程。在以太网上下文中，不同的IP子网前缀可以被映射到不同的S-VID值，使得不同的子网被实现为以太网中不同的VLAN。

52. 发明授权

US07688756B2 Provider link state bridging 失效
标题翻译：提供商链接状态桥接
公开(公告)号：US07688756B2
公开(公告)日：2010-03-30
申请号：US11537775
申请日：2006-10-02
申请人： David Allan , Nigel Bragg
发明人： David Allan , Nigel Bragg
IPC分类号： H04L12/28
CPC分类号： H04L12/18 , H04L12/462 , H04L12/4625 , H04L12/4641 , H04L12/4675 , H04L41/0816 , H04L45/00 , H04L45/02 , H04L45/12 , H04L45/16 , H04L45/18 , H04L45/48 , H04L45/66 , H04L49/3009 , H04L49/354
摘要： Provider Link State Bridging (PLSB) expands static configuration of Ethernet MAC forwarding tables by the control plane and utilizes direct manipulation of Ethernet forwarding by a link state routing system. At least one media-access-control (MAC) address for unicast forwarding to the bridge and at least one MAC address for multicast forwarding from the bridge are assigned. Bridges exchange state information by a link state bridging protocol so that a synchronized configured view of the network is shared between nodes. Each node can calculate shortest path connective between peer bridging nodes and populated the appropriate forwarding tables. A reverse path forwarding check is performed on incoming packets to provide loop suppression. During times of network instability the loop suppression can be disabled for unicast packets as identified by the destination MAC address to buffer packets and minimize the impact on traffic flow.
摘要翻译：提供商链路状态桥接（PLSB）通过控制平面扩展以太网MAC转发表的静态配置，并利用链路状态路由系统直接操作以太网转发。至少一个媒体访问控制（MAC）地址，用于单播转发到网桥和至少一个MAC地址，用于从网桥进行组播转发。桥接器通过链路状态桥接协议来交换状态信息，使得节点之间共享网络的同步配置视图。每个节点可以计算对等桥接节点之间的最短路径连接，并填充适当的转发表。对传入的数据包进行反向路径转发检查，以提供环路抑制。在网络不稳定的时期，可以通过目的MAC地址标识的单播报文禁止环路抑制，以缓冲数据包，并尽量减少对流量的影响。

53. 发明申请

US20090073998A1 Interworking Point to Point Protocol for Digital Subscriber Line Access w/Ethernet Connections in the Aggregation Network 审中-公开
标题翻译：用于数字用户线路接入的互操作点对点协议与聚合网络中的以太网连接
公开(公告)号：US20090073998A1
公开(公告)日：2009-03-19
申请号：US12299719
申请日：2007-05-06
申请人： David Allan , Nigel Bragg
发明人： David Allan , Nigel Bragg
IPC分类号： H04L12/56
CPC分类号： H04L29/1233 , H04L12/4625 , H04L29/12839 , H04L61/25 , H04L61/6022
摘要： Methods and apparatus for enabling the establishment of a Point to Point Protocol (PPP) session to a broadband network gateway through an access node of a packet-switched wireline aggregation network and methods and apparatus for enabling Ethernet frame data to be transported through an access node of packet-switched wireline aggregation network between a remote gateway a broadband network gateway are provided. In one aspect conventional PPP over Ethernet (PPPoE) BNG discovery using broadcast PADI messages is replaced by configured unicast PADI messages to specified BNGs over Ethernet Connections. In other aspects Ethernet data is transported through the access node by swapping the upstream source MAC address with the MAC address of the access node to shield the provider network from customer MAC addresses, and swapping the downstream destination MAC address to the MAC address of the remote gateway by looking up the MAC address of the remote gateway in a mapping of PPPoE Session ID to MAC address of the remote gateway.
摘要翻译：能够通过分组交换有线聚合网络的接入节点建立到宽带网络网关的点到点协议（PPP）会话的方法和装置，以及用于使以太网帧数据能够通过接入节点传输的方法和装置在远程网关提供宽带网关之间的分组交换有线聚合网络。在一个方面，使用广播PADI消息的常规PPP over Ethernet（PPPoE）BNG发现被配置的通过以太网连接指定的BNG的单播PADI消息替换。在其他方面，以太网数据通过接入节点通过交换上游源MAC地址与接入节点的MAC地址进行传输，以将提供商网络与客户MAC地址隔离，并将下游目的MAC地址交换到远端的MAC地址网关通过在PPPoE会话ID映射到远程网关的MAC地址的映射中查找远程网关的MAC地址。

54. 发明申请

US20060029032A1 System and method for hub and spoke virtual private network 失效
标题翻译：集线器和分支虚拟专用网络的系统和方法
公开(公告)号：US20060029032A1
公开(公告)日：2006-02-09
申请号：US10910685
申请日：2004-08-03
申请人： David Allan , Nigel Bragg , Liam Casey , Jerome Chiabaut
发明人： David Allan , Nigel Bragg , Liam Casey , Jerome Chiabaut
IPC分类号： H04L12/28
CPC分类号： H04L47/825 , H04L12/4679 , H04L45/04 , H04L45/50 , H04L47/15 , H04L47/20 , H04L47/70 , H04L47/724 , H04L47/762 , H04L47/781 , H04L47/822
摘要： A method and system for providing a virtual private communication network to transport customer data between a set of customer devices coupled to a provider network. A committed information rate is advertised to a provider tandem. The provider tandem determines whether sufficient network resources exist to successfully transport to a destination customer device all offered data from the set of customer devices.
摘要翻译：一种用于提供虚拟专用通信网络以在耦合到提供商网络的一组客户设备之间传送客户数据的方法和系统。承诺的信息速率被通告给提供商。提供商串联确定是否存在足够的网络资源以成功地将目标客户设备传送到来自该组客户设备的所有提供的数据。

55. 发明申请

US20050220096A1 Traffic engineering in frame-based carrier networks 审中-公开
标题翻译：基于帧的运营商网络中的流量工程
公开(公告)号：US20050220096A1
公开(公告)日：2005-10-06
申请号：US10818685
申请日：2004-04-06
申请人： Robert Friskney , Nigel Bragg , Simon Parry , Peter Ashwood-Smith , David Allan
发明人： Robert Friskney , Nigel Bragg , Simon Parry , Peter Ashwood-Smith , David Allan
IPC分类号： H04L12/46 , H04L12/56
CPC分类号： H04L45/74 , H04L12/4641 , H04L12/4645 , H04L45/54 , H04L45/64 , H04L45/66 , H04L47/122 , H04L49/205 , H04L49/253 , H04L49/254 , H04L49/351 , H04L49/354
摘要： The invention relates to enabling traffic engineering in frame-based networks such as Ethernet networks. There is described a method of and connection controller for establishing connections (76, 77) in a frame-based communications network comprising nodes (71-75 and 78) such as Ethernet switches. The connections are established by configuring, in various of the nodes, mappings for forwarding data frames, such as Ethernet frames. The mappings are from a combination of a) a destination address corresponding to a destination node (73) of the connection and b) an identifier, such as a VLAN tag. The mappings are to selected output ports of the various nodes. By using the combination of destination address AND identifier, the mappings enable data frames belonging to different connections (76, 77) to be forwarded differentially (ie forwarded on different output ports) at a node (75) despite the different connections having the same destination node. This enables flexibility in routing connections—ie the ability to perform traffic engineering.
摘要翻译：本发明涉及在诸如以太网的基于帧的网络中启用流量工程。描述了在包括诸如以太网交换机的节点（71-75和78）的基于帧的通信网络中建立连接（76,77）的方法和连接控制器。通过在各种节点中配置用于转发数据帧（例如以太网帧）的映射来建立连接。所述映射来自a）与所述连接的目的地节点（73）对应的目的地地址的组合，以及b）诸如VLAN标签的标识符。映射到各个节点的选定输出端口。通过使用目的地地址和标识符的组合，映射使得属于不同连接（76,77）的数据帧在节点（75）处被差分地转发（即，在不同输出端口上转发），尽管具有相同目的地的不同连接节点。这使路由连接具有灵活性，即执行流量工程的能力。

56. 发明授权

US08750820B2 Method and apparatus for selecting between multiple equal cost paths 失效
标题翻译：用于在多个等成本路径之间进行选择的方法和装置
公开(公告)号：US08750820B2
公开(公告)日：2014-06-10
申请号：US13589372
申请日：2012-08-20
申请人： David Allan , Nigel Bragg , Jerome Chiabaut
发明人： David Allan , Nigel Bragg , Jerome Chiabaut
IPC分类号： H04M11/00
CPC分类号： H04L45/24 , H04L12/66 , H04L45/00 , H04L45/12 , H04L45/66
摘要： Each equal cost path is assigned a path ID created by concatenating an ordered set of link IDs which form the path through the network. The link IDs are created from the node IDs on either set of the link. The link IDs are sorted from lowest to highest to facilitate ranking of the paths. The low and high ranked paths are selected from this ranked list as the first set of diverse paths through the network. Each of the link IDs on each of the paths is then renamed, for example by inverting either all of the high node IDs or low node IDs. After re-naming the links, new path IDs are created by concatenating an ordered set of renamed link IDs. The paths are then re-ranked and the low and high re-ranked paths are selected from this re-ranked list as the second set of diverse paths.
摘要翻译：为每个相等的成本路径指定了通过连接形成通过网络的路径的有序的链路ID组创建的路径ID。链接ID是从链路的任一组上的节点ID创建的。链接ID从最低到最高排列，以便于路径的排名。从这个排名列表中选择低和高排名的路径作为通过网络的第一组不同路径。然后，每个路径上的每个链路ID被重命名，例如通过反转所有高节点ID或低节点ID。在链接重新命名之后，通过连接重命名的链接ID的有序集来创建新的路径ID。然后将路径重新排列，并且从该重新排列的列表中选择低和高重新排序的路径作为第二组不同路径。

57. 发明授权

US08711863B2 Virtual links in a routed ethernet mesh network 有权
标题翻译：路由以太网网状网络中的虚拟链路
公开(公告)号：US08711863B2
公开(公告)日：2014-04-29
申请号：US12430671
申请日：2009-04-27
申请人： David Allan , Nigel Bragg
发明人： David Allan , Nigel Bragg
IPC分类号： H04L12/28
CPC分类号： H04L45/24 , H04L45/02 , H04L45/66
摘要： Virtual links may be used to divert traffic within an Ethernet network without affecting overall traffic patterns on the Ethernet network. In one embodiment, the virtual link may be established on the network via a routing system in use on the network. Nodes on a defined path for the virtual link will install forwarding state for the virtual link so that traffic may follow the defined path through the network. The logical view of the virtual link, from a routing perspective however, has the same cost as the shortest path between the endpoints of the virtual link and, accordingly, does not affect other traffic patterns on the network. Once established, the end nodes on the virtual path will have two equal cost paths through the network—one following the shortest path tree and one along the path for the virtual link. The end nodes may use a tie breaking process in an Equal Cost Multi Path (ECMP) selection process to preferentially select the virtual link over the shortest path.
摘要翻译：可以使用虚拟链路来转移以太网中的流量，而不会影响以太网上的总体流量模式。在一个实施例中，可以经由在网络上使用的路由系统在网络上建立虚拟链路。用于虚拟链路的定义路径上的节点将为虚拟链路安装转发状态，以便流量可以遵循通过网络定义的路径。然而，从路由角度看，虚拟链路的逻辑视图与虚拟链路的端点之间的最短路径具有相同的成本，因此不会影响网络上的其他流量模式。一旦建立，虚拟路径上的终端节点将具有通过网络的两条相同的成本路径，一个在最短路径树之后，一个沿着虚拟链路的路径。终端节点可以使用等价成本多路径（ECMP）选择过程中的中断过程优先选择最短路径上的虚拟链路。

58. 发明授权

US08699329B2 Tie-breaking in shortest path determination 失效
标题翻译：在最短路径确定中断断
公开(公告)号：US08699329B2
公开(公告)日：2014-04-15
申请号：US13023823
申请日：2011-02-09
申请人： Jerome Chiabaut , David Allan , Nigel Bragg , Peter Ashwood Smith
发明人： Jerome Chiabaut , David Allan , Nigel Bragg , Peter Ashwood Smith
IPC分类号： G01R31/08
CPC分类号： H04L45/12 , H04L45/00 , H04L45/22 , H04L45/24
摘要： A consistent tie-breaking decision between equal-cost shortest (lowest cost) paths is achieved by comparing an ordered set of node identifiers for each of a plurality of end-to-end paths. Alternatively, the same results can be achieved, on-the-fly, as a shortest path tree is constructed, by making a selection of an equal-cost path using the node identifiers of the diverging branches of the tree. Both variants allow a consistent selection to be made of equal-cost paths, regardless of where in the network the shortest paths are calculated. This ensures that traffic flow between any two nodes, in both the forward and reverse directions, will always follow the same path through the network.
摘要翻译：通过比较多个端到端路径中的每一个的有序节点标识符集来实现等成本最短（最低成本）路径之间的一致的打破决定。或者，通过使用树的分支分支的节点标识符选择等价路径，可以实时地实现与最短路径树相同的结果。这两种变体允许对等成本路径进行一致的选择，而不管网络中哪些地方计算最短路径。这确保任何两个节点之间在正向和反向方向上的业务流量将始终遵循通过网络的相同路径。

59. 发明授权

US08514878B1 Point-to-multipoint (P2MP) resilience for GMPLS control of ethernet 失效
标题翻译：以太网GMPLS控制的点对多点（P2MP）弹性
公开(公告)号：US08514878B1
公开(公告)日：2013-08-20
申请号：US13594247
申请日：2012-08-24
申请人： David Allan , Nigel Bragg
发明人： David Allan , Nigel Bragg
IPC分类号： H04J3/26
CPC分类号： H04L45/16 , H04L45/22 , H04L45/28 , H04L45/48 , H04L45/50
摘要： In an Ethernet network multiple point-to-multipoint (P2MP) trees are constructed to provide a P2MP service. Each tree provides service from a common root node to common leaves via different paths through the network. GMPLS signaling is utilized for configuring and maintaining the P2MP trees at each of the nodes in the network forming the respective tree. Each tree is constructed using a unique VID/MAC combination wherein the VID is unique to the tree and the MAC is associated with the multicast group identifying the P2MP membership. Traffic is forwarded through the network by the designated tree(s) by the VID/MAC DA combination by the common root node. The varying paths of each tree improves fault tolerance and enables redundancy and protection switching to be provided. Each tree of the service can be modified or repaired while traffic is still being routed through the remaining working tree(s), thus service impact is minimized.
摘要翻译：在以太网网络中，构建了多个点对多点（P2MP）树来提供P2MP服务。每个树通过网络通过不同的路径提供从公共根节点到公共叶的服务。 GMPLS信令用于在形成相应树的网络中的每个节点处配置和维护P2MP树。每个树使用独特的VID / MAC组合构建，其中VID对于树是唯一的，并且MAC与识别P2MP成员资格的多播组相关联。通过由公共根节点的VID / MAC DA组合由指定的树通过网络转发流量。每棵树的不同路径提高了容错能力，并提供了冗余和保护切换。服务的每个树可以被修改或修复，同时流量仍然通过剩余的工作树进行路由，从而最大程度地降低了服务的影响。

60. 发明申请

US20130013810A1 METHOD AND APPARATUS FOR ACCOMMODATING DUPLICATE MAC ADDRESSES 审中-公开
标题翻译：用于存储双重MAC地址的方法和装置
公开(公告)号：US20130013810A1
公开(公告)日：2013-01-10
申请号：US13547326
申请日：2012-07-12
申请人： David Allan , Nigel Bragg
发明人： David Allan , Nigel Bragg
IPC分类号： G06F15/16
CPC分类号： H04L61/2015 , H04L12/2881 , H04L29/12264 , H04L29/12839 , H04L29/12933 , H04L61/2046 , H04L61/6022 , H04L61/6068
摘要： Each access node is associated with one or more IP subnets with a preferred default subnet. Each subnet is instantiated as a unique virtual Ethernet broadcast domain. As client nodes register on the communication network, they will dynamically try to obtain an IP address for use on the communication network. As part of this process, the MAC address of the client node will be checked to ensure that it is not a duplicate of another MAC address associated with another client node that has already been assigned an IP address from the default subnet. When duplicate MAC addresses are detected, the device with the duplicate MAC address will be assigned an IP address from a different subnet so that more than one client device with the same MAC address are not associated with the same subnet.
摘要翻译：每个访问节点与一个或多个具有优选默认子网的IP子网相关联。每个子网被实例化为唯一的虚拟以太网广播域。随着客户端节点在通信网络中的注册，他们将动态地尝试获取在通信网络上使用的IP地址。作为此过程的一部分，将检查客户端节点的MAC地址，以确保它不是与已从默认子网分配了IP地址的另一个客户端节点关联的另一个MAC地址重复。当检测到重复的MAC地址时，具有重复MAC地址的设备将被分配来自不同子网的IP地址，以便具有相同MAC地址的多个客户端设备不与同一个子网相关联。

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