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1. 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。

2. 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。

3. 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。

4. 发明申请

WO2009088880A1 IMPLEMENTATION OF VPNS OVER A LINK STATE PROTOCOL CONTROLLED ETHERNET NETWORK 审中-公开
标题翻译：通过链路状态协议控制以太网网络实现VPNS
公开(公告)号：WO2009088880A1
公开(公告)日：2009-07-16
申请号：PCT/US2008/088569
申请日：2008-12-30
申请人： NORTEL NETWORKS LIMITED , UNBEHAGEN, Paul , ALLAN, David , GERMAIN, Bruno , LAPUH, Roger , ANUMALA, Mohnish , BRAGG, Nigel
发明人： UNBEHAGEN, Paul , ALLAN, David , GERMAIN, Bruno , LAPUH, Roger , ANUMALA, Mohnish , BRAGG, Nigel
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L12/4662 , H04L12/462 , H04L12/4645 , H04L12/4683 , H04L45/02 , H04L45/028 , H04L45/04 , H04L45/502 , H04L45/52 , H04L45/54 , H04L45/66
摘要： Nodes on an Ethernet network implement a link state routing protocol. Nodes assign an IP address or I-SID value per VRF and advertise the IP addresses or I-SID values using LSAs. When a packet is to be forwarded on the VPN, the ingress node identifies the VRF for the packet and performs an IP lookup in customer address space in the VRF to determine the next hop and IP address or I-SID value of the VRF on the egress node. The ingress node prepends an I-SID or IP header to identify the VRFs and creates a MAC header to allow the packet to be forwarded to the egress node on the Ethernet network. When the packet is received at the egress node, the MAC header is stripped from the packet and the appended I-SID or IP header is used to identify the egress VRF.
摘要翻译：以太网上的节点实现链路状态路由协议。节点为每个VRF分配IP地址或I-SID值，并使用LSA通告IP地址或I-SID值。当在VPN上转发数据包时，入口节点识别数据包的VRF，并在VRF的客户地址空间中执行IP查找，以确定VRF的下一跳和IP地址或I-SID值出口节点。入口节点添加I-SID或IP头以识别VRF，并创建一个MAC报头，以允许将数据包转发到以太网上的出口节点。当在出口节点处接收到分组时，从分组中剥离MAC报头，并使用附加的I-SID或IP报头来识别出口VRF。

5. 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。

6. 发明申请

WO2011041895A1 METHOD AND APPARATUS FOR EXCHANGING ROUTING INFORMATION AND ESTABLISHING CONNECTIVITY ACROSS MULTIPLE NETWORK AREAS 审中-公开
标题翻译：交换路由信息的方法和装置，并建立多个网络区域的连通性
公开(公告)号：WO2011041895A1
公开(公告)日：2011-04-14
申请号：PCT/CA2010/001587
申请日：2010-10-06
申请人： NORTEL NETWORKS LIMITED , CASEY, Liam M. , ALLAN, David Ian , BRAGG, Nigel Lawrence , CHIABAUT, Jerome
发明人： CASEY, Liam M. , ALLAN, David Ian , BRAGG, Nigel Lawrence , CHIABAUT, Jerome
IPC分类号： H04L12/56 , H04L12/40 , H04L12/46
CPC分类号： H04L12/462 , H04L12/4641 , H04L45/02 , H04L45/026 , H04L45/04 , H04L45/16 , H04L45/18 , H04L45/66
摘要： A method ensures that multicast packets follow the same loop-free path followed by unicast packets in a packet communication network. The communication network includes at least one first area interconnected through at least one area border node ("ABN") to a second area. Each ABN has a first level port connected to each first area and a second level port connected to the second area. Each multicast packet forwarded includes a header having a root-id identifying a root of a multicast tree. A data packet is received at an ABN. Responsive to receiving a multicast packet at a second level port of an area border node, the root-id of the multicast packet is examined and if the multicast packet is to be forwarded over at least one of the first level ports, a different root-id is substituted into the packet before the packet is forwarded over the first level port.
摘要翻译：一种方法可以确保组播数据包遵循相同的无循环路径，随后是分组通信网络中的单播数据包。通信网络包括通过至少一个区域边界节点（“ABN”）互连到第二区域的至少一个第一区域。每个ABN具有连接到每个第一区域的第一级端口和连接到第二区域的第二级端口。转发的每个组播数据包包括一个具有标识多播树根的根ID的报头。在ABN处接收数据分组。响应于在区域边界节点的第二级端口处接收到组播数据包，检查组播数据包的根ID，如果要通过至少一个第一级端口转发组播数据包，在通过第一级端口转发数据包之前，将id替换为数据包。

7. 发明申请

WO2010124367A1 VIRTUAL LINKS IN A ROUTED ETHERNET MESH NETWORK 审中-公开
标题翻译：路由式以太网网络中的虚拟链路
公开(公告)号：WO2010124367A1
公开(公告)日：2010-11-04
申请号：PCT/CA2010/000611
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： H04Q3/64 , H04L12/28 , H04L12/56
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，以便流量可能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。

8. 发明申请

WO2009079771A1 EVOLUTION OF ETHERNET NETWORKS 审中-公开
标题翻译：以太网网络演进
公开(公告)号：WO2009079771A1
公开(公告)日：2009-07-02
申请号：PCT/CA2008/002234
申请日：2008-12-19
申请人： NORTEL NETWORKS LIMITED , BRAGG, Nigel , ALLAN, David , PARRY, Simon , FRISKNEY, Robert , BRUECKHEIMER, Simon
发明人： BRAGG, Nigel , ALLAN, David , PARRY, Simon , FRISKNEY, Robert , BRUECKHEIMER, Simon
IPC分类号： H04L12/40 , H04L12/56
CPC分类号： H04L12/4641 , H04L12/462 , H04L12/4654 , H04L12/4658 , H04L12/4662 , H04L41/12 , H04L43/50 , H04L45/745
摘要： An Ethernet network comprises nodes which support a plurality of different forwarding modes. A range of VLAN Identifiers (VIDs) are allocated to each of the forwarding modes. Connections are configured between a source node and a destination node of the network using different forwarding modes. Packets carrying data traffic are sent to the destination node by selectively setting a VID in a packet to a first value, to transfer a packet via a first connection and a first forwarding mode, and a second value to transfer a packet via the second connection and the second forwarding mode. Packets received from both of the connections and sent on to an end-user. VLAN Identifiers can be allocated to different releases of functionality at nodes (e.g. software releases) such that packets are forwarded via a set of nodes supporting a first release, or via a set of nodes supporting a second release. It is possible to provide a controlled and disruption-free network evolution.
摘要翻译：以太网网络包括支持多个不同转发模式的节点。每个转发模式都分配了一系列VLAN标识符（VID）。使用不同的转发模式在网络的源节点和目的节点之间配置连接。通过选择性地将数据包中的VID设置为第一值，经由第一连接和第一转发模式传送分组，以及经由第二连接传送分组的第二值，将携带数据业务的分组发送到目的地节点，第二转发模式。从两个连接接收到的数据包发送给最终用户。 VLAN标识符可以被分配给节点（例如软件版本）上的不同版本的功能，使得分组经由支持第一版本的一组节点或经由支持第二版本的一组节点转发。可以提供受控和无中断的网络演进。

9. 发明申请

WO2008130620A4 FAILURE NOTIFICATION IN A NETWORK HAVING SERIALLY CONNECTED NODES 审中-公开
标题翻译：在具有串行连接节点的网络中的失败通知
公开(公告)号：WO2008130620A4
公开(公告)日：2008-12-31
申请号：PCT/US2008005004
申请日：2008-04-18
申请人： NORTEL NETWORKS LTD , 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：使用链路状态协议控制的网络的多播能力来加速网络的部分内的拓扑改变通知的泛洪广告。这种泛洪机制在具有大量双连接节点（例如环形网络架构）的网络中可能特别有效。当洪泛式拓扑变化通知时使用控制层面特定的组播组地址，并且诸如反向路径转发检查的处理被用作对通知的转发的附加控制以防止控制面分组的循环。两个连接的节点将转发条目插入到其FIB中，以使得包含控制消息的帧能够经由数据平面被转发到下游节点，使得控制消息沿着两个连接的节点链的传播可以发生在数据平面速度。

10. 发明申请

WO2007129056A3 INTERWORKING POINT TO POINT PROTOCOL FOR DIGITAL SUBSCRIBER LINE ACCESS WITH ETHERNET CONNECTIONS IN THE AGGREGATION NETWORK 审中-公开
标题翻译：与聚合网络中以太网连接的数字订户线访问点协议的交互点
公开(公告)号：WO2007129056A3
公开(公告)日：2008-01-03
申请号：PCT/GB2007001628
申请日：2007-05-03
申请人： NORTEL NETWORKS LTD , ALLAN DAVID , BRAGG NIGEL
发明人： ALLAN DAVID , BRAGG NIGEL
IPC分类号： H04L12/28 , H04L29/12
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。

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