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1.发明授权Global state resynchronization for path computation element failure during a reoptimization process 有权重新优化过程中路径计算元素故障的全局状态重新同步公开(公告)号：US09077615B2
公开(公告)日：2015-07-07
申请号：US13524632
申请日：2012-06-15
IPC分类号： H04L1/02 , H04J3/14 , H04L12/24 , H04L12/46 , H04L12/751 , H04L12/707 , H04L12/703 , H04L12/717 , H04L12/723 , H04L12/26
CPC分类号： H04L41/0663 , H04L12/4633 , H04L43/10 , H04L45/02 , H04L45/22 , H04L45/28 , H04L45/42 , H04L45/50
摘要： In one embodiment, a router initiates reroutes of one or more tunnels at the router as part of optimization of a plurality of tunnels in a computer network, and stores an original state of the one or more tunnels at the router prior to the optimization. By detecting whether path computation element (PCE) failure occurs prior to completion of the optimization, the router may revert to the original state of the one or more tunnels in response to PCE failure prior to completion of the optimization.
摘要翻译： 在一个实施例中，路由器发起路由器处的一个或多个隧道的路由器作为计算机网络中的多个隧道的优化的一部分，并且在优化之前在路由器处存储一个或多个隧道的原始状态。 通过检测在优化完成之前是否发生路径计算元件（PCE）故障，路由器可以在完成优化之前响应于PCE故障而恢复到一个或多个隧道的原始状态。
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2.发明申请公开(公告)号：US20130336108A1
公开(公告)日：2013-12-19
申请号：US13524632
申请日：2012-06-15
IPC分类号： H04L12/26
CPC分类号： H04L41/0663 , H04L12/4633 , H04L43/10 , H04L45/02 , H04L45/22 , H04L45/28 , H04L45/42 , H04L45/50
摘要： In one embodiment, a router initiates reroutes of one or more tunnels at the router as part of optimization of a plurality of tunnels in a computer network, and stores an original state of the one or more tunnels at the router prior to the optimization. By detecting whether path computation element (PCE) failure occurs prior to completion of the optimization, the router may revert to the original state of the one or more tunnels in response to PCE failure prior to completion of the optimization.
摘要翻译： 在一个实施例中，路由器发起路由器处的一个或多个隧道的路由器作为计算机网络中的多个隧道的优化的一部分，并且在优化之前在路由器处存储一个或多个隧道的原始状态。 通过检测在优化完成之前是否发生路径计算元件（PCE）故障，路由器可以在完成优化之前响应于PCE故障而恢复到一个或多个隧道的原始状态。
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3.发明授权Time-based scheduling for tunnels computed by a stateful path computation element 有权由状态路径计算元素计算的隧道的基于时间的调度公开(公告)号：US09197508B2
公开(公告)日：2015-11-24
申请号：US13524751
申请日：2012-06-15
IPC分类号： H04L12/24 , H04L12/26 , H04L12/911
CPC分类号： H04L41/0896 , H04L41/147 , H04L47/823 , H04L47/825 , H04L47/826
摘要： In one embodiment, a path computation element (PCE) in a computer network receives one or more path computation requests (PCReqs), and records a time of each PCReq and the corresponding requested bandwidth. Based on this information, the PCE may determine a traffic profile of the computer network, and may augment a traffic engineering database (TED) with requested bandwidth according to time based on the traffic profile. As such, prior to a particular time, the PCE may determine placement of tunnels within the traffic profile for the particular time.
摘要翻译： 在一个实施例中，计算机网络中的路径计算元件（PCE）接收一个或多个路径计算请求（PCReq），并记录每个PCReq的时间和相应的请求带宽。 基于该信息，PCE可以确定计算机网络的流量简档，并且可以基于流量简档来根据时间来增加具有所请求带宽的流量工程数据库（TED）。 因此，在特定时间之前，PCE可以在特定时间内确定隧道在业务简档内的布置。
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4.发明申请TIME-BASED SCHEDULING FOR TUNNELS COMPUTED BY A STATEFUL PATH COMPUTATION ELEMENT 有权一个稳定的路径计算元素计算的隧道的基于时间的调度公开(公告)号：US20130336126A1
公开(公告)日：2013-12-19
申请号：US13524751
申请日：2012-06-15
CPC分类号： H04L41/0896 , H04L41/147 , H04L47/823 , H04L47/825 , H04L47/826
摘要： In one embodiment, a path computation element (PCE) in a computer network receives one or more path computation requests (PCReqs), and records a time of each PCReq and the corresponding requested bandwidth. Based on this information, the PCE may determine a traffic profile of the computer network, and may augment a traffic engineering database (TED) with requested bandwidth according to time based on the traffic profile. As such, prior to a particular time, the PCE may determine placement of tunnels within the traffic profile for the particular time.
摘要翻译： 在一个实施例中，计算机网络中的路径计算元件（PCE）接收一个或多个路径计算请求（PCReq），并记录每个PCReq的时间和相应的请求带宽。 基于该信息，PCE可以确定计算机网络的流量简档，并且可以基于流量简档来根据时间来增加具有所请求带宽的流量工程数据库（TED）。 因此，在特定时间之前，PCE可以在特定时间内确定隧道在业务简档内的布置。
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5.发明授权Optimal automated exploration of hierarchical multiprotocol label switching label switch paths 有权分层多协议标签交换标签交换路径的最佳自动化探索公开(公告)号：US08116227B1
公开(公告)日：2012-02-14
申请号：US11642473
申请日：2006-12-20
申请人： Danny Prairie , Yufei Shi , George Swallow , Thomas D. Nadeau , Vanson Lim , Jean-Philippe Vasseur
发明人： Danny Prairie , Yufei Shi , George Swallow , Thomas D. Nadeau , Vanson Lim , Jean-Philippe Vasseur
摘要： Optimal automated exploration of hierarchical MPLS LSPs is disclosed. A path verification message (PVM) is transmitted from an initial router. Each label in the PVM's label stack corresponds to a hierarchy layer and is associated with a time-to-live (TTL) field. The TTL field for the label of a current layer is set so the PVM travels one hop from the initial router. In response, a reply message indicating that the PVM reached its destination is received. These steps are then repeated. For each successive PVM transmitted, the TTL field associated with a label corresponding to the current hierarchy layer is incremented. For any reply message including information describing a non-current layer, modify the next PVM's label stack and increment the TTL field of the label for the described different layer; any other TTL fields are unchanged. If any received reply message indicates a destination router was reached, the process terminates.
摘要翻译： 公开了分层MPLS LSP的最佳自动化探索。 从初始路由器发送路径验证消息（PVM）。 PVM标签堆栈中的每个标签对应于层次结构层，并与生存时间（TTL）字段相关联。 当前层的标签的TTL字段设置为使PVM从初始路由器传播一跳。 作为响应，接收到指示PVM到达其目的地的应答消息。 然后重复这些步骤。 对于发送的每个连续的PVM，与当前层级层相对应的标签相关联的TTL字段递增。 对于包含描述非当前层的信息的任何回复消息，修改下一个PVM的标签栈，并增加描述的不同层的标签的TTL字段; 任何其他TTL字段都不变。 如果任何接收到的回复消息指示到达目的地路由器，则该过程终止。
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6.发明申请Technique for dynamically restoring original TE-LSP attributes for interdomain TE-LSPs 有权用于动态恢复域间TE-LSP的原始TE-LSP属性的技术公开(公告)号：US20070208871A1
公开(公告)日：2007-09-06
申请号：US11368160
申请日：2006-03-03
IPC分类号： G06F15/16
摘要： A technique dynamically restores original attributes of a Traffic Engineering La-bel Switched Path (TE-LSP) that are provided in a source domain for a destination domain when traversing one or more intermediate domains that may translate the TE-LSP attributes in a computer network. According to the novel technique, a head-end node requests an interdomain TE-LSP having one or more original TE-LSP attributes (e.g., priority, bandwidth, etc.) using a signaling exchange. The head-end node may also request restoration of the original TE-LSP attributes upon entrance into the destination domain. Intermediate domains (e.g., border routers of the domains) receiving the request may translate the original TE-LSP attributes into corresponding intermediate domain TE-LSP attributes. When the request reaches the destination domain, the intermediate domain TE-LSP attributes of the requested TE-LSP are restored into the original TE-LSP attributes.
摘要翻译： 一种技术动态地恢复在遍历可能转换计算机网络中的TE-LSP属性的一个或多个中间域时为目的地域提供的源域中提供的流量工程La-bel交换路径（TE-LSP）的原始属性 。 根据该新技术，前端节点使用信令交换请求具有一个或多个原始TE-LSP属性（例如，优先级，带宽等）的域间TE-LSP。 前端节点还可以在进入目的地域时请求恢复原始TE-LSP属性。 接收请求的中间域（例如，域的边界路由器）可以将原始TE-LSP属性转换为相应的中间域TE-LSP属性。 当请求到达目的域时，请求的TE-LSP的中间域TE-LSP属性恢复为原始TE-LSP属性。
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7.发明授权Technique for dynamically restoring original TE-LSP attributes for interdomain TE-LSPs 有权用于动态恢复域间TE-LSP的原始TE-LSP属性的技术公开(公告)号：US08966113B2
公开(公告)日：2015-02-24
申请号：US11368160
申请日：2006-03-03
IPC分类号： G06F15/173 , H04L12/723 , H04L12/715 , G06F15/16
摘要： A technique dynamically restores original attributes of a Traffic Engineering Label Switched Path (TE-LSP) that are provided in a source domain for a destination domain when traversing one or more intermediate domains that may translate the TE-LSP attributes in a computer network. According to the novel technique, a head-end node requests an interdomain TE-LSP having one or more original TE-LSP attributes (e.g., priority, bandwidth, etc.) using a signaling exchange. The head-end node may also request restoration of the original TE-LSP attributes upon entrance into the destination domain. Intermediate domains (e.g., border routers of the domains) receiving the request may translate the original TE-LSP attributes into corresponding intermediate domain TE-LSP attributes. When the request reaches the destination domain, the intermediate domain TE-LSP attributes of the requested TE-LSP are restored into the original TE-LSP attributes.
摘要翻译： 当遍历可能转换计算机网络中的TE-LSP属性的一个或多个中间域时，技术动态地恢复在目的地域的源域中提供的流量工程标签交换路径（TE LSP）的原始属性。 根据该新技术，前端节点使用信令交换请求具有一个或多个原始TE-LSP属性（例如，优先级，带宽等）的域间TE-LSP。 前端节点还可以在进入目的地域时请求恢复原始TE-LSP属性。 接收请求的中间域（例如，域的边界路由器）可以将原始TE-LSP属性转换为相应的中间域TE-LSP属性。 当请求到达目的域时，请求的TE-LSP的中间域TE-LSP属性恢复为原始TE-LSP属性。
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8.发明授权Optimal automated exploration of hierarchical multiprotocol label switching label switch paths 有权分层多协议标签交换标签交换路径的最佳自动化探索公开(公告)号：US08717936B1
公开(公告)日：2014-05-06
申请号：US13358290
申请日：2012-01-25
申请人： Danny Prairie , Yufei Shi , George Swallow , Thomas D. Nadeau , Vanson Lim , Jean-Philippe Vasseur
发明人： Danny Prairie , Yufei Shi , George Swallow , Thomas D. Nadeau , Vanson Lim , Jean-Philippe Vasseur
IPC分类号： H04L12/28
摘要： Optimal automated exploration of hierarchical Multiprotocol Label Switching Label Switch Paths (MPLS LSPs) is disclosed. A path verification message (PVM) is transmitted from an initial router. Each label in the PVM's label stack corresponds to a hierarchy layer and is associated with a time-to-live (TTL) field. The TTL field for the label of a current layer is set so the PVM travels one hop from the initial router. In response, a reply message indicating that the PVM reached its destination is received.
摘要翻译： 披露了分层多协议标签交换标签交换路径（MPLS LSP）的最佳自动化探索。 从初始路由器发送路径验证消息（PVM）。 PVM标签堆栈中的每个标签对应于层次结构层，并与生存时间（TTL）字段相关联。 当前层的标签的TTL字段设置为使PVM从初始路由器传播一跳。 作为响应，接收到指示PVM到达其目的地的应答消息。
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9.发明申请Methods and apparatus for providing optimal identification and processing of layer 3 control channels 审中-公开提供第3层控制通道的最佳识别和处理的方法和装置公开(公告)号：US20080008168A1
公开(公告)日：2008-01-10
申请号：US11482920
申请日：2006-07-07
IPC分类号： H04L12/56
CPC分类号： H04L69/22 , H04L69/325 , H04W80/04
摘要： A method for processing token identifiers for Layer 3 (L3) control channels when encapsulated in a tunneling protocol. Rather than encapsulating an L3 control channel with a secondary L3 (or Layer 4 ‘L4 ’) header, a generic (non-Layer 3 header) identifier, or token identifier, is used to encapsulate the control channel. For example, the token identifier may be a simple bit pattern that does not require a complex, confusing or redundant IP/UDP routing table lookup. Instead, the token identifier simply alerts the forwarding entity that local processing of the packet's data is required (e.g., that the packet contains control channel data).
摘要翻译： 一种用于在封装在隧道协议中时处理第3层（L3）控制信道的令牌标识符的方法。 使用辅助L3（或层4'L4'）报头封装L3控制信道，而不是使用通用（非第3层报头）标识符或令牌标识符来封装控制信道。 例如，令牌标识符可以是不需要复杂，混淆或冗余的IP / UDP路由表查找的简单位模式。 相反，令牌标识符简单地提醒转发实体，需要对分组的数据进行本地处理（例如，该分组包含控制信道数据）。
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公开(公告)号：US08619598B2
公开(公告)日：2013-12-31
申请号：US12657676
申请日：2010-01-25
申请人： Luca Martini , George Swallow
发明人： Luca Martini , George Swallow
IPC分类号： H04B7/212 , H04L12/50 , G06F15/177
CPC分类号： H04L45/50 , H04L45/245 , H04L45/68 , Y02D50/30
摘要： In one embodiment, a method includes generating an aggregated pseudowire status message at a first network device in a Multi-Protocol Label Switching (MPLS) network, transmitting the aggregated pseudowire status message to a second network device on a Label Switched Path (LSP) extending between the first and second network devices in the MPLS network, and establishing at the first network device, an aggregated pseudowire status session with the second network device upon receiving a response to the aggregated pseudowire status message on the LSP. The aggregated pseudowire status message configured to verify a current status of pseudowires on the LSP. An apparatus is also disclosed.
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