公开(公告)号：US20090196298A1

公开(公告)日：2009-08-06

申请号：US12025998

申请日：2008-02-05

申请人： Ali Sajassi ,  Samer M. Salam ,  Christopher Y. Metz

发明人： Ali Sajassi ,  Samer M. Salam ,  Christopher Y. Metz

IPC分类号： H04L12/56

CPC分类号： H04L12/4658 ,  H04L12/4662 ,  H04L45/50 ,  H04L45/68

摘要： Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means for transportation of IEEE 802.1ah frames over Multiprotocol Label Switching (MPLS) pseudowires for Virtual Private LAN Services (VPLS). The IEEE 802.1ah frames include a corresponding B-VLAN tag, while the MPLS packets including these frames do not include the corresponding B-VLAN tag, and disclosed are methods and apparatus for performing such translation.

摘要翻译： 公开了用于通过用于虚拟专用LAN服务（VPLS）的多协议标签交换（MPLS）伪线传输IEEE 802.1ah帧的方法，装置，计算机存储介质，机制和装置。 IEEE 802.1ah帧包括对应的B-VLAN标签，而包括这些帧的MPLS分组不包括相应的B-VLAN标签，并且公开了用于执行这种转换的方法和装置。

公开(公告)号：US20130121150A1

公开(公告)日：2013-05-16

申请号：US13294164

申请日：2011-11-10

申请人： Ali Sajassi ,  Samer M. Salam

发明人： Ali Sajassi ,  Samer M. Salam

IPC分类号： H04L12/56 ,  H04L12/26

CPC分类号： H04L12/4633 ,  H04L12/462 ,  H04L12/4662 ,  H04L47/24 ,  H04L47/2483

摘要： In one embodiment, backbone service instance identifiers (I-SIDs) of backbone frames are modified based on flow identification of frames encapsulated therein to induce entropy into the headers of the backbone frames. Backbone packet switching devices use the modified service instance identifier to load balance the corresponding frame through the backbone network. At an exit point of the backbone network, the original backbone service instance identifier (I-SID) associated with a frame encapsulated in a backbone frame is recovered from the modified service instance identifier, with this recovery typically including determining the flow identification of the frame encapsulated in the backbone frame.

摘要翻译： 在一个实施例中，骨干帧的骨干服务实例标识符（I-SID）基于其中封装的帧的流标识被修改，以将熵引入到主干帧的报头中。 骨干分组交换设备使用经过修改的业务实例标识符通过骨干网对相应帧进行负载均衡。 在骨干网的出口处，从被修改的服务实例标识符中恢复与被封装在骨干帧中的帧相关联的原始骨干服务实例标识符（I-SID），该恢复通常包括确定帧的流标识 封装在骨干框架中。

公开(公告)号：US20120213222A1

公开(公告)日：2012-08-23

申请号：US13031909

申请日：2011-02-22

申请人： Clarence Filsfils ,  Sami Boutros ,  Samer M. Salam ,  Ali Sajassi

发明人： Clarence Filsfils ,  Sami Boutros ,  Samer M. Salam ,  Ali Sajassi

IPC分类号： H04L12/28

CPC分类号： H04L12/4641 ,  H04L45/16 ,  H04L45/50 ,  H04L45/68

摘要： In one embodiment, single-homing and active-active multi-homing is provided in a Virtual Private LAN Service (VPLS). A customer edge node actively communicates frames of a same Virtual Private Network (VPN) instance with two or more VPLS nodes of a VPLS network. The VPLS nodes are configured to appropriately forward frames throughout the VPLS network: without looping of a frame sent by the same external node back to the same external node, without flooding multiple copies of a frame to the same external node, and while performing learning of addresses in forwarding tables of said VPLS nodes such that said forwarding tables of said VPLS nodes converge despite frames of the same LAN service being received by said at least two of said VPLS nodes from the same external node.

摘要翻译： 在一个实施例中，在虚拟专用LAN服务（VPLS）中提供单归属和主动主动多归位。 客户边缘节点主动将相同虚拟专用网（VPN）实例的帧与VPLS网络的两个或多个VPLS节点进行通信。 VPLS节点被配置为在整个VPLS网络中适当地转发帧：不将相同外部节点发送的帧循环回相同的外部节点，而不会将帧的多个拷贝淹没到同一个外部节点，同时执行学习 在所述VPLS节点的转发表中的地址，使得所述VPLS节点的所述转发表收敛，尽管所述至少两个所述VPLS节点从相同外部节点接收到相同LAN服务的帧。

公开(公告)号：US08503329B2

公开(公告)日：2013-08-06

申请号：US12536427

申请日：2009-08-05

申请人： John J. Mullooly ,  Ali Sajassi ,  Pradosh K. Mohapatra ,  Samer M. Salam

发明人： John J. Mullooly ,  Ali Sajassi ,  Pradosh K. Mohapatra ,  Samer M. Salam

IPC分类号： H04L12/28

CPC分类号： H04L49/15 ,  H04L45/04 ,  H04L45/58

摘要： In an embodiment, a method of signaling status at a routing device is provided. In this method, the routing device establishes an inter-chassis control plane channel session with a remote routing device. Here, the routing device and the remote routing device are linked to a multi-homed routing device. The routing device then synchronizes with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device. The state of the link is thereafter advertised by way of Border Gateway Protocol (BGP). Additionally, a method of discovering inter-chassis communication peers via BGP between the first and remote routing devices is provided.

公开(公告)号：US20120106360A1

公开(公告)日：2012-05-03

申请号：US12914722

申请日：2010-10-28

申请人： ALI SAJASSI ,  Samer M. Salam

发明人： ALI SAJASSI ,  Samer M. Salam

IPC分类号： H04L12/26

CPC分类号： H04L12/437 ,  H04L45/22 ,  H04L45/28 ,  H04L45/68

摘要： Techniques are described which provide mechanisms for dual-homing an access ring for virtual private wire service (VPWS) Ethernet line (E-Line) services. The mechanism may provide resiliency against access ring failures and offer a restoration time of 50 msec upon failure. A method to provide such resiliency may generally include determining, at a first ring port of an access node, a ring failure in an Ethernet ring. Upon determining the first ring port of the access node is not situated on a same side of the Ethernet ring as a node designated as a ring protection link (RPL) owner, a message is transmitted on a second ring port of the access node towards a provider edge (PE) node. The message is used to activate pseudowires (PWs) at the PE node for virtual local area networks (VLANs) of the access node.

摘要翻译： 描述了提供用于虚拟专线服务（VPWS）以太网线路（E-Line）服务的双归属接入环的机制的技术。 该机制可以提供针对接入环故障的弹性，并且在故障时提供恢复时间为50毫秒。 提供这种弹性的方法通常可以包括在接入节点的第一环形端口处确定以太环中的环路故障。 在确定接入节点的第一环形端口不与作为指定为环形保护链路（RPL）所有者的节点位于以太网环的同一侧上时，消息在接入节点的第二环形端口上朝向 提供商边缘（PE）节点。 该消息用于在接入节点的虚拟局域网（VLAN）的PE节点处激活伪线（PW）。

公开(公告)号：US20110032945A1

公开(公告)日：2011-02-10

申请号：US12536427

申请日：2009-08-05

申请人： John Joseph Mullooly ,  Ali Sajassi ,  Pradosh Kumar Mohapatra ,  Samer M. Salam

发明人： John Joseph Mullooly ,  Ali Sajassi ,  Pradosh Kumar Mohapatra ,  Samer M. Salam

IPC分类号： H04L12/56

CPC分类号： H04L49/15 ,  H04L45/04 ,  H04L45/58

摘要： In an embodiment, a method of signaling status at a routing device is provided. In this method, the routing device establishes an inter-chassis control plane channel session with a remote routing device. Here, the routing device and the remote routing device are linked to a multi-homed routing device. The routing device then synchronizes with the remote routing device by way of the inter-chassis control plane channel session to identify a state of a link from the routing device to the multi-homed routing device. The state of the link is thereafter advertised by way of Border Gateway Protocol (BGP). Additionally, a method of discovering inter-chassis communication peers via BGP between the first and remote routing devices is provided.

摘要翻译： 在一个实施例中，提供了一种在路由设备处发信号通知状态的方法。 在该方法中，路由设备与远程路由设备建立机柜间控制平面信道会话。 这里，路由设备和远程路由设备链接到多宿主路由设备。 然后，路由设备通过机架间控制平面信道会话与远程路由设备同步，以识别从路由设备到多归属路由设备的链路的状态。 之后通过边界网关协议（BGP）通告链路的状态。 另外，提供了一种通过第一和远程路由设备之间的BGP发现机架间通信对等体的方法。

公开(公告)号：US08644134B2

公开(公告)日：2014-02-04

申请号：US12914722

申请日：2010-10-28

申请人： Ali Sajassi ,  Samer M. Salam

发明人： Ali Sajassi ,  Samer M. Salam

IPC分类号： G01R31/08

CPC分类号： H04L12/437 ,  H04L45/22 ,  H04L45/28 ,  H04L45/68

摘要： Techniques are described which provide mechanisms for dual-homing an access ring for virtual private wire service (VPWS) Ethernet line (E-Line) services. The mechanism may provide resiliency against access ring failures and offer a restoration time of 50 msec upon failure. A method to provide such resiliency may generally include determining, at a first ring port of an access node, a ring failure in an Ethernet ring. Upon determining the first ring port of the access node is not situated on a same side of the Ethernet ring as a node designated as a ring protection link (RPL) owner, a message is transmitted on a second ring port of the access node towards a provider edge (PE) node. The message is used to activate pseudowires (PWs) at the PE node for virtual local area networks (VLANs) of the access node.

摘要翻译： 描述了提供用于虚拟专线服务（VPWS）以太网线路（E-Line）服务的双归属接入环的机制的技术。 该机制可以提供针对接入环故障的弹性，并且在故障时提供恢复时间为50毫秒。 提供这种弹性的方法通常可以包括在接入节点的第一环形端口处确定以太网环中的环路故障。 在确定接入节点的第一环形端口不与作为指定为环形保护链路（RPL）所有者的节点位于以太网环的同一侧上时，消息在接入节点的第二环形端口上朝向 提供商边缘（PE）节点。 该消息用于在接入节点的虚拟局域网（VLAN）的PE节点处激活伪线（PW）。

公开(公告)号：US08385353B2

公开(公告)日：2013-02-26

申请号：US12409314

申请日：2009-03-23

申请人： Samer M. Salam ,  Ali Sajassi ,  Samuel Henderson

发明人： Samer M. Salam ,  Ali Sajassi ,  Samuel Henderson

IPC分类号： H04L12/28

CPC分类号： H04L41/0659 ,  H04L12/4641 ,  H04L12/4675 ,  H04L43/0811

摘要： Connectivity Fault Management (CFM) auto-provisioning using Virtual Private LAN Service (VPLS) auto-discovery is described. In one embodiment, an apparatus comprises VPLS logic and configuration logic. The VPLS logic is operable at least to receive and send configuration information for a VPLS instance, where the configuration information comprises: a first value that uniquely identifies the VPLS instance; and a plurality of second values that respectively and uniquely identify a plurality of network elements that are operable to provide the VPLS instance. The configuration logic is operable at least to automatically configure, based on the first value and on the plurality of second values, a CFM association and a local maintenance endpoint (MEP) for the VPLS instance on the apparatus.

摘要翻译： 描述了使用虚拟专用LAN服务（VPLS）自动发现的连接故障管理（CFM）自动配置。 在一个实施例中，一种装置包括VPLS逻辑和配置逻辑。 所述VPLS逻辑至少可操作地接收和发送VPLS实例的配置信息，其中所述配置信息包括：唯一地标识所述VPLS实例的第一值; 以及分别唯一地识别可操作以提供VPLS实例的多个网络元件的多个第二值。 所述配置逻辑至少可操作地基于所述第一值和所述多个第二值自动配置所述设备上的VPLS实例的CFM关联和本地维护端点（MEP）。

公开(公告)号：US08300523B2

公开(公告)日：2012-10-30

申请号：US12180934

申请日：2008-07-28

申请人： Samer M. Salam ,  Ali Sajassi

发明人： Samer M. Salam ,  Ali Sajassi

IPC分类号： G01R31/08

CPC分类号： H04L43/0811 ,  H04L41/0677

摘要： In one embodiment a method is provided for forwarding traffic through a standby device in the event of an uplink connection failure. The method generally includes forwarding traffic received on a first downlink connection with a dual-homed device to an uplink connection with a network core, detecting a failure on the uplink connection with the network core, and in response to detecting the failure, notifying a standby device of the failure and sending a message to the dual-homed device to trigger the dual-homed device to begin forwarding traffic to the network core via a second downlink connection between the standby device and the dual-homed device.

摘要翻译： 在一个实施例中，提供了在上行链路连接失败的情况下通过备用设备转发业务的方法。 该方法通常包括将在第一下行链路连接上接收的业务与双归属设备转发到与网络核心的上行链路连接，检测与网络核心的上行链路连接的故障，并且响应于检测到故障，通知备用 设备故障并向双归属设备发送消息以触发双归属设备，以通过备用设备和双归属设备之间的第二下行链路连接向网络核心转发流量。

公开(公告)号：US07886080B2

公开(公告)日：2011-02-08

申请号：US11948405

申请日：2007-11-30

申请人： Ali Sajassi ,  Samer M. Salam

发明人： Ali Sajassi ,  Samer M. Salam

IPC分类号： G06F15/16 ,  G06F15/177

CPC分类号： H04L12/4625 ,  H04L12/4633 ,  H04L45/48 ,  H04L45/66

摘要： In one embodiment, a method for managing topology changes in a Layer 2 network is provided. The method may comprise receiving a change notification at a provider edge bridging device and associating the change notification with a customer service. The method may further comprise identifying at least one destination provider edge bridging device associated with the customer service, encapsulating the change notification in a data frame and tunnelling the data frame over a tunnel comprising at least one core device to the at least one destination provider edge bridging device associated with the customer service, the at least one core bridging device tunnelling the data frame based on information relating to the destination provider edge bridging device.

摘要翻译： 在一个实施例中，提供了一种用于管理第2层网络中的拓扑变化的方法。 该方法可以包括在提供商边缘桥接设备处接收改变通知并将该改变通知与客户服务相关联。 所述方法还可以包括：识别与所述客户服务相关联的至少一个目的地提供者边缘桥接设备，将所述改变通知封装在数据帧中，并且将所述数据帧通过包括至少一个核心设备的隧道进行隧道传送到所述至少一个目的地提供商边缘 与所述客户服务相关联的桥接设备，所述至少一个核心桥接设备基于与所述目的地提供商边缘桥接设备相关的信息来隧道化所述数据帧。