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1. 发明申请

WO2010069041A1 RESILIENT ATTACHMENT TO PROVIDER LINK STATE BRIDGING (PLSB) NETWORKS 审中-公开
标题翻译：提供链路状态桥梁（PLSB）网络的强制性附件
公开(公告)号：WO2010069041A1
公开(公告)日：2010-06-24
申请号：PCT/CA2009/001674
申请日：2009-11-24
申请人： NORTEL NETWORKS LIMITED , CASEY, Liam , ALLAN, David , BRAGG, Nigel, L. , CHIABAUT, Jerome , ASHWOOD SMITH, Peter
发明人： CASEY, Liam , ALLAN, David , BRAGG, Nigel, L. , CHIABAUT, Jerome , ASHWOOD SMITH, Peter
IPC分类号： H04L12/24 , H04L29/10
CPC分类号： H04L41/0654 , H04L12/66 , H04L45/02 , H04L45/22 , H04L45/245 , H04L45/48 , H04L45/74 , H04L47/41 , H04L2212/00 , Y02D50/30
摘要： A method system for interfacing a client system in a first network domain with a Provider Link State Bridging (PLSB) network domain. At least two Backbone Edge Bridges (BEBs) of the PLSB domain 20 are provided. Each BEB is an end-point of a connection in the first network domain to the client system and an end-point of at least a unicast path defined within the PLSB domain 20. An inter-node trunk is provided in the PLSB domain 20 for interconnecting the at least two BEBs. A phantom node is defined in the PLSB domain 20. The phantom node has a unique address in the PLSB domain 20 and is notionally located on the inter-node trunk one hop from each of the BEBs. Each of the BEBs is configured such that: an ingress packet received from the client system via the connection in the first network domain is forwarded through a path notionally rooted at the phantom node; and an egress subscriber packet destined for the client system is forwarded to the client system through the connection in the first network domain.
摘要翻译：一种用于将第一网络域中的客户端系统与提供商链路状态桥接（PLSB）网络接口的方法系统。提供了PLSB域20的至少两个骨干边缘桥（BEB）。每个BEB是在第一网络域中到客户端系统的连接的端点以及在PLSB域20内定义的至少单播路径的端点。在PLSB域20中提供节点间中继，用于互连所述至少两个BEB。在PLSB域20中定义了虚拟节点。虚拟节点在PLSB域20中具有唯一的地址，并且从每个BEB中概念地位于节点间中继一跳。每个BEB被配置为使得经由第一网络域中的连接从客户端系统接收的入口分组通过一个有意识地根植于虚拟节点的路径转发; 并且去往客户端系统的出口订户分组通过第一网络域中的连接被转发到客户端系统。

2. 发明申请

WO2008076201A1 METHOD AND APPARATUS FOR EXCHANGING ROUTING INFORMATION AND THE ESTABLISHMENT OF CONNECTIVITY ACROSS MULTIPLE NETWORK AREAS 审中-公开
标题翻译：交换路由信息的方法与装置以及多个网络区域建立连通性
公开(公告)号：WO2008076201A1
公开(公告)日：2008-06-26
申请号：PCT/US2007/024227
申请日：2007-11-19
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , BRAGG, Nigel , UNBEHAGEN, Paul , ASHWOOD-SMITH, Peter , GUOLI, Yin
发明人： ALLAN, David , BRAGG, Nigel , UNBEHAGEN, Paul , ASHWOOD-SMITH, Peter , GUOLI, Yin
IPC分类号： H04L12/28 , H04L12/46
CPC分类号： H04L41/12 , H04L12/462 , H04L45/02 , H04L45/04 , H04L45/66
摘要： Routes may be installed across multiple link state protocol controlled Ethernet network areas by causing ABBs to leak I-SID information advertised by BEBs a L1 network area into an L2 network area. ABBs will only leak I-SIDs for BEBs where it is the closest ABB for that BEB. Where another ABB on the L2 network also leaks the same I-SID into the L2 network area from another L1 network area, the I-SID is of multi-area interest. ABBs will advertise I-SIDs that are common to the L1 and L2 networks back into their respective L1 network. Within each L1 and L2 network area, forwarding state will be installed between network elements advertising common interest in an ISID, so that multi-area paths may be created to span the L1/L2/L1 network areas. ABBs may summarize BEB multicast trees such that the set of trees for a given I-SID transiting the ABB is condensed into a common tree. The L2 network may further be implemented as a second layer implemented using a L1/L2/L1 network structure, so that the L1/L2/L1 network structure may recurse an arbitrary number of times.
摘要翻译：路由可以跨多个链路状态协议控制的以太网网络区域安装，使ABB将L1网络区域的BEB发布的I-SID信息泄漏到L2网络区域。 ABB只会泄漏BEB的I-SID，而该BEB是该BEB最接近的ABB。如果L2网络上的另一个ABB也从同一个L1网络区域将相同的I-SID泄漏到L2网络区域，则I-SID具有多方面的兴趣。 ABB将通过将L1和L2网络通用的I-SID广播回各自的L1网络。在每个L1和L2网络区域内，转发状态将安装在对ISID广播共同兴趣的网元之间，从而可以创建多区域路径来跨越L1 / L2 / L1网络区域。 ABB可能会总结BEB组播树，以便将通过ABB的给定I-SID的树组合成一个公共树。 L2网络还可以被实现为使用L1 / L2 / L1网络结构实现的第二层，使得L1 / L2 / L1网络结构可以递归任意次数。

3. 发明申请

WO2008053252A1 TRAFFIC ENGINEERED PATHS IN A LINK STATE PROTOCOL CONTROLLED ETHERNET NETWORK 审中-公开
标题翻译：在链路状态协议控制的以太网网络中的交通工程路线
公开(公告)号：WO2008053252A1
公开(公告)日：2008-05-08
申请号：PCT/GB2007/050671
申请日：2007-11-02
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , BRAGG, Nigel , ASHWOOD-SMITH, Peter
发明人： ALLAN, David , BRAGG, Nigel , ASHWOOD-SMITH, Peter
IPC分类号： H04L12/56
CPC分类号： H04L45/50 , H04L45/02 , H04L45/16 , H04L45/22 , H04L45/24 , H04L45/66
摘要： Traffic Engineered (TE) paths may be created over a link state protocol controlled Ethernet network by causing explicit paths to be installed by network elements on the link state protocol controlled Ethernet network and used to forward traffic on the network. The network elements exchange routing information using link state advertisements to enable each node on the network to build a link state database that may be used to determine shortest paths through the network. The shortest paths are used as a default forwarding state for traffic that is not associated with one of the traffic engineered paths. The link state advertisements 'may also be used to carry the TE path definitions. Where the TE paths are to be used exclusive of other routes, forwarding state for particular service instances may be removed to prevent traffic from traversing the network other than over the TE path.
摘要翻译：可以通过在链路状态协议控制的以太网上的网络元件安装明确的路径，并且用于在网络上转发流量来在链路状态协议控制的以太网上创建流量工程（TE）路径。网络元件使用链路状态通告来交换路由信息，以使网络上的每个节点建立可用于确定通过网络的最短路径的链路状态数据库。最短路径用作与未与某个交通工程路径相关联的流量的默认转发状态。链路状态通告也可用于承载TE路径定义。在TE路径被排除在其他路由之外的情况下，可以去除特定服务实例的转发状态，以防止流经过TE路径以外的网络。

4. 发明申请

WO2010032081A1 TIE-BREAKING IN SHORTEST PATH DETERMINATION 审中-公开
标题翻译：在最短路径确定中进行切割
公开(公告)号：WO2010032081A1
公开(公告)日：2010-03-25
申请号：PCT/IB2008/003940
申请日：2008-12-11
申请人： NORTEL NETWORKS LIMITED , CHIABAUT, Jérome , ALLAN, David , BRAGG, Nigel , ASHWOOD SMITH, Peter
发明人： CHIABAUT, Jérome , ALLAN, David , BRAGG, Nigel , ASHWOOD SMITH, Peter
IPC分类号： H04L12/56
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：通过比较多个端对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。

5. 发明申请

WO2008130620A1 FAILURE NOTIFICATION IN A NETWORK HAVING SERIALLY CONNECTED NODES 审中-公开
标题翻译：具有连续连接的网络的故障通知
公开(公告)号：WO2008130620A1
公开(公告)日：2008-10-30
申请号：PCT/US2008/005004
申请日：2008-04-18
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , BETTS, Malcolm , BRAGG, Nigel , ASHWOOD SMITH, Peter , UNBEHAGEN, Paul
发明人： ALLAN, David , BETTS, Malcolm , BRAGG, Nigel , ASHWOOD SMITH, Peter , UNBEHAGEN, Paul
IPC分类号： H04L12/40 , H04L12/28
CPC分类号： H04L12/437 , H04L45/02 , H04L45/123 , H04L45/16 , H04L45/22 , H04L45/28 , H04L45/32
摘要： Multicast capabilities of a link state protocol controlled network are used to accelerate the flooding advertisement of topology change notifications within portions of the network. This flooding mechanism may be particularly efficient in a network with a large number of two-connected nodes such as a ring network architecture. A control plane specific multicast group address is used when flooding topology change notifications, and a process such as reverse path forwarding check is used as an additional control on forwarding of the notification to prevent looping of control plane packets. Two-connected nodes insert a forwarding entry into their FIB to enable frames containing the control message to be forwarded via the data plane on to the downstream node so that propagation of the control message along a chain of two-connected nodes may occur at data plane speeds.
摘要翻译：链路状态协议控制网络的组播功能用于加速网络部分内的拓扑变化通知的泛洪广告。这种洪泛机制在具有大量双连接节点（例如环网架构）的网络中可能是特别有效的。泛洪拓扑变化通知时使用控制平面特定的组播组地址，并且使用诸如反向路径转发检查之类的过程作为通知转发的附加控制，以防止控制平面分组的循环。双连接节点将转发条目插入到其FIB中，以使包含控制消息的帧能够经由数据平面转发到下游节点，使得控制消息沿双连接节点链的传播可能发生在数据平面速度。

6. 发明公开

EP2227880A1 IP FORWARDING ACROSS A LINK STATE PROTOCOL CONTROLLED ETHERNET NETWORK 审中-公开
标题翻译： IP转发的通链路状态协议控制的以太网
公开(公告)号：EP2227880A1
公开(公告)日：2010-09-15
申请号：EP08870330.1
申请日：2008-12-30
申请人： Nortel Networks Limited , Allan, David , Bragg, Nigel
发明人： UNBEHAGEN, Paul , ALLAN, David , BRAGG, Nigel
IPC分类号： H04L12/28
CPC分类号： H04L12/4625 , H04L12/462 , H04L29/12028 , H04L45/00 , H04L45/02 , H04L45/42 , H04L45/66 , H04L45/742 , H04L61/103
摘要： Nodes on an Ethernet network run a link state protocol on the control plane and install shortest path forwarding state into their FIBs to allow packets to follow shortest paths through the network without requiring MAC header replacement at each hop on the network. When a node learns an IP address, it inserts the IP address into a LSA to advertise reachability of the IP address on the network. Each node will add this IP address to its link state database. If a packet arrives at an ingress node, the ingress node will read the IP address, determine which node on the link state protocol controlled Ethernet network advertised the IP address, and construct a MAC header to forward the packet to the node. The DA/VID of the MAC header is the nodal MAC of the node that advertised the IP address. Unicast and multicast IP forwarding are implemented.

7. 发明申请

WO2010124366A1 PRE-COMPUTING ALTERNATE FORWARDING STATE IN A ROUTED ETHERNET MESH NETWORK 审中-公开
标题翻译：路由式以太网网络中的预先计算转发状态
公开(公告)号：WO2010124366A1
公开(公告)日：2010-11-04
申请号：PCT/CA2010/000609
申请日：2010-04-21
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , ASHWOOD-SMITH, Peter
发明人： ALLAN, David , ASHWOOD-SMITH, Peter
IPC分类号： H04L29/14 , H04L12/28
CPC分类号： H04L12/462 , H04L45/02 , H04L45/021 , H04L45/18 , H04L45/22 , H04L45/28 , H04L45/66 , H04L69/40
摘要： A set of critical nodes or links is identified on the network and alternate forwarding state is pre-computed and disseminated within a node such that, upon failure of one of the critical nodes/links, a minimal trigger will cause the alternate forwarding state to be used to forward traffic on the routed Ethernet mesh network. In one embodiment rather than storing full tables of alternate forwarding state, only the changes to the forwarding state required by an identified failure is stored by the network nodes. Upon occurrence of a failure on the network, the identified failure is used to select the alternate forwarding state.
摘要翻译：在网络上识别一组关键节点或链路，并且在节点内预先计算和传播备用转发状态，使得在关键节点/链路之一发生故障时，最小触发将导致备用转发状态为用于在路由以太网网络上转发流量。在一个实施例中，而不是存储替代转发状态的完整表，只有所识别的故障所需的转发状态的改变才被网络节点存储。在网络发生故障时，使用识别的故障来选择备用转发状态。

8. 发明申请

WO2010145025A1 METHOD AND APPARATUS FOR IMPLEMENTING CONTROL OF MULTIPLE PHYSICALLY DUAL HOMED DEVICES 审中-公开
标题翻译：实现多物理双重设备控制的方法与装置
公开(公告)号：WO2010145025A1
公开(公告)日：2010-12-23
申请号：PCT/CA2010/000935
申请日：2010-06-17
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , ASHWOOD-SMITH, Peter
发明人： ALLAN, David , ASHWOOD-SMITH, Peter
IPC分类号： H04L29/06 , H04L12/66
CPC分类号： H04L12/437 , A61K31/337 , A61K33/00 , A61K47/12 , H04L41/0668 , H04L41/0672 , H04L45/28 , H04L45/66 , H04L49/351 , H04L49/70
摘要： A ring control protocol is used to establish a separate control plane for a plurality of physically dual homed devices to enable collections of dual homed devices to be represented by a single pair of addresses into the attached routed Ethernet network. The gateway devices analyze the passing ring control packets to create direct mappings for data packets to the routed Ethernet network. Thus, although the dual homed devices are treated as a ring from a control perspective, the data path is implemented to be direct so that data packets continue to flow directly from the dual homed devices to each of the attached gateway devices. In one embodiment, each of the gateway devices implements a virtual switch and advertises the MAC address of the virtual switch into the routed Ethernet network rather than the MAC addresses of each of the attached Ethernet Switch Units.
摘要翻译：环控制协议用于为多个物理双重归属设备建立单独的控制平面，以使得双归属设备的集合可以由连接的路由以太网中的单对地址表示。网关设备分析通过的环控制数据包，以创建到路由以太网的数据包的直接映射。因此，虽然从控制角度将双重归属设备视为环，但是数据路径被实现为直接的，使得数据分组继续直接从双归属设备流向每个附接的网关设备。在一个实施例中，每个网关设备实现虚拟交换机并将虚拟交换机的MAC地址通告给路由的以太网，而不是每个连接的以太网交换机单元的MAC地址。

9. 发明申请

WO2010127431A1 METHOD AND APPARATUS FOR MULTICAST IMPLEMENTATION IN A ROUTED ETHERNET MESH NETWORK 审中-公开
标题翻译：在路由以太网网络中进行多播实现的方法和装置
公开(公告)号：WO2010127431A1
公开(公告)日：2010-11-11
申请号：PCT/CA2010/000625
申请日：2010-04-21
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , BRAGG, Nigel , CHIABAUT, Jerome
发明人： ALLAN, David , BRAGG, Nigel , CHIABAUT, Jerome
IPC分类号： H04L12/44
CPC分类号： H04L45/12 , H04L12/185 , H04L12/4641 , H04L45/00 , H04L45/16 , H04L45/66 , H04L67/1044 , H04L67/1046 , H04N1/333
摘要： Interest in multicast group membership may be advertised via a routing system on an Ethernet network along with an indication of an algorithm to be used by the nodes on the network to calculate the distribution tree or trees for the multicast. Each node, upon receipt of the advertisement, will determine the algorithm that is to be used to produce the multicast tree and will use the algorithm to calculate whether it is on a path between nodes advertising common interest in the multicast. Example algorithms may include shortest path algorithms and spanning tree algorithms. This allows multicast membership to be managed via the routing control plane, while enabling spanning tree processes to be used to forward multicast traffic. Since spanning tree is able to install multicast state per service rather than per source per service, this reduces the amount of forwarding state required to implement multicasts on the routed Ethernet mesh network.
摘要翻译：可以通过以太网网络上的路由系统以及由网络上的节点使用的算法的指示来广播对组播组成员的兴趣，以计算组播的分布树或树。每个节点在接收到广告时将确定要用于生成多播树的算法，并且将使用该算法来计算是否在节点之间的路径上，广播广播上的共同兴趣。示例算法可以包括最短路径算法和生成树算法。这允许通过路由控制平面管理多播成员资格，同时使用生成树进程来转发组播流量。由于生成树能够按服务安装多播状态，而不是每个服务的每个源，因此减少了在路由以太网网络上实现组播所需的转发状态量。

10. 发明申请

WO2010121377A1 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：WO2010121377A1
公开(公告)日：2010-10-28
申请号：PCT/CA2010/000610
申请日：2010-04-21
申请人： NORTEL NETWORKS LIMITED , ALLAN, David , BRAGG, Nigel
发明人： ALLAN, David , BRAGG, Nigel
IPC分类号： H04L12/24 , H04L12/56 , H04L29/08
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。

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