公开(公告)号：US07782790B1

公开(公告)日：2010-08-24

申请号：US11638063

申请日：2006-12-12

申请人： Thomas D. Nadeau ,  George Leonard Swallow ,  Danny Prairie ,  David D. Ward

发明人： Thomas D. Nadeau ,  George Leonard Swallow ,  Danny Prairie ,  David D. Ward

IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04L12/28

CPC分类号： H04W40/02 ,  H04W40/12

摘要： To reveal link bundles' component links in an MPLS network, transmit a sequence of request and reply packets. For a router receiving a request packet, the packet identifies that link bundles should be revealed, detect the link bundle links connected to the router, and for each, its component links are added to a downstream mapping field (DMF). A link bundle mapping field (LBMF) is also added to the request packet. Each LBMF specifies the component links of that link bundle by pointing to the component links added to the DMF. For a router responding to a request packet with a reply packet, determine if any links in the DMF are component links, and for each, identify a LBMF containing information regarding that link. Each component link in the DMF is processed. The component links in each LBMF are iterated through to ensure each matches the determined links in the DMF.

摘要翻译： 为了在MPLS网络中显示链路束的组件链路，发送请求和应答数据包的顺序。 对于接收到请求报文的路由器，报文会识别链路捆绑应该被显示出来，检测连接到路由器的链路捆绑链路，并且每个链路捆绑链路都被添加到下游映射域（DMF）。 链路捆绑映射字段（LBMF）也被添加到请求包中。 每个LBMF通过指向添加到DMF的组件链接来指定该链接束的组件链接。 对于响应具有应答分组的请求分组的路由器，确定DMF中的任何链路是否是组件链路，并且对于每个链路，标识包含关于该链路的信息的LBMF。 处理DMF中的每个组件链接。 迭代每个LBMF中的组件链接，以确保每个LBMF与DMF中确定的链接匹配。

公开(公告)号：US08160055B1

公开(公告)日：2012-04-17

申请号：US11361299

申请日：2006-02-24

申请人： Thomas D. Nadeau ,  Monique Jeanne Morrow ,  W. Mark Townsley ,  James N. Guichard ,  George Leonard Swallow

发明人： Thomas D. Nadeau ,  Monique Jeanne Morrow ,  W. Mark Townsley ,  James N. Guichard ,  George Leonard Swallow

IPC分类号： H04L12/28 ,  H04L12/66 ,  H04L12/26 ,  H04L1/00 ,  H04J3/14 ,  H04J1/16

CPC分类号： H04L45/68 ,  H04L12/4633 ,  H04L43/0811 ,  H04L43/10 ,  H04L45/26 ,  H04L45/50 ,  H04L45/70 ,  H04L63/0272

摘要： A pseudowire verification framework gathers and maintains status of individual pseudowires by aggregating the state of the individual node hops defining the pseudowire. The framework provides complete assessment of a network by gathering status feedback from network nodes (forwarding entities) that are inaccessible directly from a requesting node by employing an intermediate forwarding entity as a proxy for inquiring on behalf of the requesting node. Therefore, status regarding inaccessible pseudowires is obtainable indirectly from nodes able to “see” the particular pseudowire. Configurations further assess multihop pseudowires including a plurality of network segments; in which each segment defines a pseudowire hop including forwarding entities along the pseudowire path. In this manner, pseudowire health and status is gathered and interrogated for nodes (forwarding) entities unable to directly query the subject pseudowire via intermediate forwarding entities.

摘要翻译： 伪线验证框架通过聚合定义伪线的单个节点跳跃的状态来收集并维护各个伪线的状态。 该框架通过采用中间转发实体作为用于代表请求节点进行查询的代理而从请求节点直接访问的网络节点（转发实体）收集状态反馈来提供网络的完整评估。 因此，可以从能够“看到”特定伪线的节点间接地获得关于无法访问的伪线的状态。 配置进一步评估包括多个网段的多跳伪线; 其中每个段定义包括沿着伪线路径的转发实体的伪线跳。 以这种方式，对于不能通过中间转发实体直接查询主体伪线的节点（转发）实体，收集并询问伪线健康状态。

公开(公告)号：US09391704B2

公开(公告)日：2016-07-12

申请号：US13769355

申请日：2013-02-17

申请人： Ornan Alexander Gerstel ,  Zafar Ali ,  Clarence Filsfils ,  George Leonard Swallow ,  Matthew Hartley

发明人： Ornan Alexander Gerstel ,  Zafar Ali ,  Clarence Filsfils ,  George Leonard Swallow ,  Matthew Hartley

IPC分类号： H04B10/27 ,  H04L12/729 ,  H04L12/721 ,  H04L12/707 ,  H04L12/717

CPC分类号： H04B10/27 ,  H04L45/12 ,  H04L45/125 ,  H04L45/22 ,  H04L45/42 ,  H04L45/62

摘要： In one embodiment, a replacement network communications path is determined using dedicated resources of an existing path. One or more network elements in a network determines a new communications path between a first network node and a second network node in the network while an existing communications path is currently configured in the network to carry traffic between the first and second network nodes. The existing communications path includes one or more exclusive physical resources dedicated to the existing communications path. The new communications path includes at least one of said exclusive physical resources dedicated to the existing communications path. One embodiment includes: subsequent to said determining the new communications path, removing the existing communications path from service, and then instantiating the new communications path, with the new communications path including said at least one of said exclusive physical resources.

摘要翻译： 在一个实施例中，使用现有路径的专用资源来确定替换网络通信路径。 网络中的一个或多个网络元件确定网络中的第一网络节点和第二网络节点之间的新的通信路径，而现有的通信路径当前被配置在网络中以承载第一和第二网络节点之间的业务。 现有的通信路径包括专用于现有通信路径的一个或多个专用物理资源。 新的通信路径包括专用于现有通信路径的所述独占物理资源中的至少一个。 一个实施例包括：在所述确定新的通信路径之后，从服务中移除现有的通信路径，然后实例化新的通信路径，新的通信路径包括所述独占物理资源中的所述至少一个。

公开(公告)号：US09013985B2

公开(公告)日：2015-04-21

申请号：US13655937

申请日：2012-10-19

申请人： Muthurajah Sivabalan ,  Sami Boutros ,  George Leonard Swallow ,  Show Chung Chin

发明人： Muthurajah Sivabalan ,  Sami Boutros ,  George Leonard Swallow ,  Show Chung Chin

IPC分类号： H04L12/24 ,  H04L12/707 ,  H04L12/703 ,  H04L12/723 ,  H04L12/911

CPC分类号： H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L47/825

摘要： In one embodiment, a primary bidirectional LSP is established between an originating LSP packet switching device and a destination LSP packet switching device through an intermediate packet switching device. A corresponding backup LSP is also established. The originating LSP packet switching device sends a particular label switched packet to the destination LSP packet switching device over the primary bidirectional LSP. An intermediate packet switching device sends the particular label switched packet back to the originating LSP packet switching device over the primary bidirectional LSP in response to an error condition identified as affecting the primary bidirectional LSP towards the destination LSP packet switching device. The originating LSP packet switching device receives the particular label switched packet and sends it to the destination packet switching device over the backup LSP.

摘要翻译： 在一个实施例中，通过中间分组交换设备在始发LSP分组交换设备和目的地LSP分组交换设备之间建立主双向LSP。 也建立了相应的备份LSP。 始发LSP分组交换设备通过主双向LSP向目的LSP分组交换设备发送特定的标签交换分组。 中间分组交换设备响应于被识别为对目的地LSP分组交换设备影响主双向LSP的错误状况，通过主双向LSP将特定标签交换分组发送回始发LSP分组交换设备。 始发LSP分组交换设备接收特定的标签交换分组，并通过备份LSP将其发送到目的分组交换设备。

公开(公告)号：US20140112124A1

公开(公告)日：2014-04-24

申请号：US13655937

申请日：2012-10-19

申请人： Muthurajah Sivabalan ,  Sami Boutros ,  George Leonard Swallow ,  Show Chung Chin

发明人： Muthurajah Sivabalan ,  Sami Boutros ,  George Leonard Swallow ,  Show Chung Chin

IPC分类号： H04L12/56 ,  H04L12/24

CPC分类号： H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L47/825

摘要： In one embodiment, a primary bidirectional LSP is established between an originating LSP packet switching device and a destination LSP packet switching device through an intermediate packet switching device. A corresponding backup LSP is also established. The originating LSP packet switching device sends a particular label switched packet to the destination LSP packet switching device over the primary bidirectional LSP. An intermediate packet switching device sends the particular label switched packet back to the originating LSP packet switching device over the primary bidirectional LSP in response to an error condition identified as affecting the primary bidirectional LSP towards the destination LSP packet switching device. The originating LSP packet switching device receives the particular label switched packet and sends it to the destination packet switching device over the backup LSP.

摘要翻译： 在一个实施例中，通过中间分组交换设备在始发LSP分组交换设备和目的地LSP分组交换设备之间建立主双向LSP。 也建立了相应的备份LSP。 始发LSP分组交换设备通过主双向LSP向目的LSP分组交换设备发送特定的标签交换分组。 中间分组交换设备响应于被识别为对目的地LSP分组交换设备影响主双向LSP的错误状况，通过主双向LSP将特定标签交换分组发送回始发LSP分组交换设备。 始发LSP分组交换设备接收特定的标签交换分组，并通过备份LSP将其发送到目的分组交换设备。

公开(公告)号：US20120275338A1

公开(公告)日：2012-11-01

申请号：US13095846

申请日：2011-04-27

申请人： Clarence Filsfils ,  John H. W. Bettink ,  George Leonard Swallow

发明人： Clarence Filsfils ,  John H. W. Bettink ,  George Leonard Swallow

IPC分类号： H04L12/28

CPC分类号： H04L12/4625 ,  H04L49/252 ,  H04L49/3009 ,  H04L49/552

摘要： In one embodiment, forwarding information bases (FIBs) are selectively populated in a packet switch. A packet switching device determines, based on one or more protocol signaling messages, a subset, which is less than all, on which FIBs a lookup operation may be performed for identifying forwarding information for a received particular packet. The packet switching device populates each of these FIBs, but not all of the FIBs of the packet switching device, with forwarding information corresponding to the particular forwarding value. Thus, FIB resources are consumed for only those FIBs which could actually be used, and not all of the FIBs, for forwarding packets in the data plane of the packet switching device, whether these packets are received on a primary or backup path.

摘要翻译： 在一个实施例中，转发信息库（FIB）被选择性地填充在分组交换机中。 分组交换设备基于一个或多个协议信令消息确定小于全部的子集，FIB可以在哪个FIB上执行查找操作以识别接收到的特定分组的转发信息。 分组交换设备填充分组交换设备中的每个FIB，但不是所有的分组交换设备的FIB，转发信息对应于特定的转发值。 因此，只有那些实际可以使用的FIB，而不是所有的FIB用于在分组交换设备的数据平面中转发分组，是否在主路径或备用路径上接收到FIB资源。

公开(公告)号：US20130070764A1

公开(公告)日：2013-03-21

申请号：US13234331

申请日：2011-09-16

申请人： Sami Boutros ,  George Leonard Swallow ,  Nobushige Akiya

发明人： Sami Boutros ,  George Leonard Swallow ,  Nobushige Akiya

IPC分类号： H04L12/56

CPC分类号： H04L45/66 ,  H04L49/3054 ,  H04L49/351

摘要： In one embodiment, a Bidirectional Forwarding Detection (BFD) asynchronous mode session is established between two packet switching devices interconnected by one or more physical links. Prior to L2 or L3 services being established, each of these packet switching devices does not know the Media Access Control (MAC) nor Internet Protocol (IP) addresses of each interface of the other packet switching device that is connected to one of these link(s). A request to establish a BFD session is sent from one packet switching device to the other, with a MAC frame including the request being addressed to a group, broadcast, or other address that the receiving packet switching device will recognize and thus process the received request. Based on information contained in this received MAC frame, the receiving packet switching device has the information it needs, and sends a BFD control frame to the other packet switching device.

摘要翻译： 在一个实施例中，通过一个或多个物理链路互连的两个分组交换设备之间建立双向转发检测（BFD）异步模式会话。 在建立L2或L3服务之前，这些分组交换设备中的每一个不知道连接到这些链路之一的另一分组交换设备的每个接口的媒体接入控制（MAC）或互联网协议（IP）地址 s）。 将建立BFD会话的请求从一个分组交换设备发送到另一个分组交换设备，其中MAC帧包括寻址到接收分组交换设备将识别的组，广播或其他地址的请求，从而处理接收到的请求 。 根据接收的MAC帧中包含的信息，接收分组交换装置具有需要的信息，向另一个分组交换装置发送BFD控制帧。

公开(公告)号：US09094344B2

公开(公告)日：2015-07-28

申请号：US13234331

申请日：2011-09-16

申请人： Sami Boutros ,  George Leonard Swallow ,  Nobushige Akiya

发明人： Sami Boutros ,  George Leonard Swallow ,  Nobushige Akiya

IPC分类号： H04L12/26 ,  H04L12/721 ,  H04L12/931 ,  H04L12/935

CPC分类号： H04L45/66 ,  H04L49/3054 ,  H04L49/351

摘要： In one embodiment, a Bidirectional Forwarding Detection (BFD) asynchronous mode session is established between two packet switching devices interconnected by one or more physical links. Prior to L2 or L3 services being established, each of these packet switching devices does not know the Media Access Control (MAC) nor Internet Protocol (IP) addresses of each interface of the other packet switching device that is connected to one of these link(s). A request to establish a BFD session is sent from one packet switching device to the other, with a MAC frame including the request being addressed to a group, broadcast, or other address that the receiving packet switching device will recognize and thus process the received request. Based on information contained in this received MAC frame, the receiving packet switching device has the information it needs, and sends a BFD control frame to the other packet switching device.

摘要翻译： 在一个实施例中，通过一个或多个物理链路互连的两个分组交换设备之间建立双向转发检测（BFD）异步模式会话。 在建立L2或L3服务之前，这些分组交换设备中的每一个不知道连接到这些链路之一的另一分组交换设备的每个接口的媒体接入控制（MAC）或互联网协议（IP）地址 s）。 将建立BFD会话的请求从一个分组交换设备发送到另一个分组交换设备，其中MAC帧包括寻址到接收分组交换设备将识别的组，广播或其他地址的请求，从而处理接收到的请求 。 根据接收的MAC帧中包含的信息，接收分组交换装置具有需要的信息，向另一个分组交换装置发送BFD控制帧。

公开(公告)号：US09014049B2

公开(公告)日：2015-04-21

申请号：US13095846

申请日：2011-04-27

申请人： Clarence Filsfils ,  John H. W. Bettink ,  George Leonard Swallow

发明人： Clarence Filsfils ,  John H. W. Bettink ,  George Leonard Swallow

IPC分类号： H04L12/28 ,  H04L12/46 ,  H04L12/947 ,  H04L12/935 ,  H04L12/939

CPC分类号： H04L12/4625 ,  H04L49/252 ,  H04L49/3009 ,  H04L49/552

摘要： In one embodiment, forwarding information bases (FIBs) are selectively populated in a packet switch. A packet switching device determines, based on one or more protocol signaling messages, a subset, which is less than all, on which FIBs a lookup operation may be performed for identifying forwarding information for a received particular packet. The packet switching device populates each of these FIBs, but not all of the FIBs of the packet switching device, with forwarding information corresponding to the particular forwarding value. Thus, FIB resources are consumed for only those FIBs which could actually be used, and not all of the FIBs, for forwarding packets in the data plane of the packet switching device, whether these packets are received on a primary or backup path.

摘要翻译： 在一个实施例中，转发信息库（FIB）被选择性地填充在分组交换机中。 分组交换设备基于一个或多个协议信令消息确定小于全部的子集，FIB可以在哪个FIB上执行查找操作以识别接收到的特定分组的转发信息。 分组交换设备填充分组交换设备中的每个FIB，但不是所有的分组交换设备的FIB，转发信息对应于特定的转发值。 因此，只有那些实际可以使用的FIB，而不是所有的FIB用于在分组交换设备的数据平面中转发分组，是否在主路径或备用路径上接收到FIB资源。

公开(公告)号：US20140233946A1

公开(公告)日：2014-08-21

申请号：US13769355

申请日：2013-02-17

申请人： Ornan Alexander Gerstel ,  Zafar Ali ,  Clarence Filsfils ,  George Leonard Swallow ,  Matthew Hartley

发明人： Ornan Alexander Gerstel ,  Zafar Ali ,  Clarence Filsfils ,  George Leonard Swallow ,  Matthew Hartley

IPC分类号： H04B10/27

CPC分类号： H04B10/27 ,  H04L45/12 ,  H04L45/125 ,  H04L45/22 ,  H04L45/42 ,  H04L45/62

摘要： In one embodiment, a replacement network communications path is determined using dedicated resources of an existing path. One or more network elements in a network determines a new communications path between a first network node and a second network node in the network while an existing communications path is currently configured in the network to carry traffic between the first and second network nodes. The existing communications path includes one or more exclusive physical resources dedicated to the existing communications path. The new communications path includes at least one of said exclusive physical resources dedicated to the existing communications path. One embodiment includes: subsequent to said determining the new communications path, removing the existing communications path from service, and then instantiating the new communications path, with the new communications path including said at least one of said exclusive physical resources.

摘要翻译： 在一个实施例中，使用现有路径的专用资源来确定替换网络通信路径。 网络中的一个或多个网络元件确定网络中的第一网络节点和第二网络节点之间的新的通信路径，而现有的通信路径当前被配置在网络中以承载第一和第二网络节点之间的业务。 现有的通信路径包括专用于现有通信路径的一个或多个专用物理资源。 新的通信路径包括专用于现有通信路径的所述独占物理资源中的至少一个。 一个实施例包括：在所述确定新的通信路径之后，从服务中移除现有的通信路径，然后实例化新的通信路径，新的通信路径包括所述独占物理资源中的所述至少一个。