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公开(公告)号：US07978708B2
公开(公告)日：2011-07-12
申请号：US11025203
申请日：2004-12-29
CPC分类号： H04L45/04 , H04L45/02 , H04L45/026 , H04L45/28 , H04L45/52
摘要： A technique configures an intermediate network node to automatically determine whether a route advertised by a routing protocol is important for fast convergence in a computer network. As used herein, an important route needed for fast convergence is a route advertised by the routing protocol, such as an exterior gateway routing protocol (EGP) process executing on the node, as a next-hop address, since external connectivity relies on such a route. Notably, the EGP process interacts with an interior gateway routing protocol (IGP) process executing on the node to identify the route as an important route. Identification of an important route, in turn, allows IGP to process the route in a high priority fashion, thereby facilitating fast convergence.
摘要翻译： 一种技术配置中间网络节点，以自动确定路由协议发布的路由是否对计算机网络中的快速收敛很重要。 如本文所使用的，快速收敛所需的重要路由是路由协议所通告的路由，例如在节点上执行的外部网关路由协议（EGP）过程作为下一跳地址，因为外部连接依赖于 路线。 值得注意的是，EGP进程与在节点上执行的内部网关路由协议（IGP）进程交互，以将路由标识为重要路由。 识别重要的路由又反过来允许IGP以高优先级的方式处理路由，从而促进快速收敛。
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72.发明授权Providing reachability information in a routing domain of an external destination address in a data communications network 有权在数据通信网络中的外部目的地地址的路由域中提供可达性信息公开(公告)号：US07957306B2
公开(公告)日：2011-06-07
申请号：US11518383
申请日：2006-09-08
申请人： Stewart F. Bryant , Mike Shand , Gargi Nalawade , Robert Raszuk , Keyur Patel , David D. Ward , Clarence Filsfils , Stefano B. Previdi
发明人： Stewart F. Bryant , Mike Shand , Gargi Nalawade , Robert Raszuk , Keyur Patel , David D. Ward , Clarence Filsfils , Stefano B. Previdi
摘要： An apparatus for providing reachability in a routing domain of a data communications network having as components nodes and links therebetween for a routing domain external destination address is provided. The apparatus is arranged to advertise destination address reachability internally to nodes in the routing domain and associate a reachability category with the internal advertisement of the destination address reachability.
摘要翻译： 提供了一种用于在数据通信网络的路由域中提供可达性的装置，其具有用于路由域外部目的地地址的节点和链路之间的组件。 该设备被布置为在路由域中的节点内部向目的地址可达性通告，并将可达性类别与目的地址可达性的内部广告相关联。
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73.发明授权公开(公告)号：US07948910B2
公开(公告)日：2011-05-24
申请号：US12043203
申请日：2008-03-06
申请人： Yuki Arbel , Michael Keohane , Ravid Sagy , Oren Shemesh , Clarence Filsfils
发明人： Yuki Arbel , Michael Keohane , Ravid Sagy , Oren Shemesh , Clarence Filsfils
IPC分类号： H04L12/56
CPC分类号： H04L43/00 , H04L43/0829 , H04L43/0852 , H04L43/12
摘要： A communication system includes multiple routers interconnected by a packet-based communication network. Each of the routers includes a monitoring application that monitors quality of one or more packet flows during each of multiple successive monitoring periods. For each of the packet flows, the monitoring application determines quality metrics based on information obtained from transport headers of packets.
摘要翻译： 通信系统包括通过基于分组的通信网络互连的多个路由器。 每个路由器包括监视应用程序，其监视在多个连续监视周期期间的每一个期间一个或多个分组流的质量。 对于每个分组流，监视应用基于从分组的传输报头获得的信息来确定质量度量。
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74.发明申请Forwarding of Packets to a Same Location Having a Same Internet Protocol (IP) Address Embedded in a Different Advertised Route 审中-公开将数据包转发到具有嵌入在不同广告路由中的相同互联网协议（IP）地址的相同位置公开(公告)号：US20110080911A1
公开(公告)日：2011-04-07
申请号：US12573088
申请日：2009-10-02
IPC分类号： H04L12/56
摘要： Routes advertised in a network may include an Internet Protocol (IP) address and one or more values to distinguish the route from other route(s) including the same IP address. Routes in a same context (e.g., within a same Virtual Private Network or for an entire network) with a same IP address are considered to refer to a same destination. When these routes are associated with different paths through a network, these different paths can be used to forward traffic for packets associated with routes including a same IP address (in a same context), particularly in response to a network problem.
摘要翻译： 在网络中通告的路由可以包括因特网协议（IP）地址和一个或多个值以区分路由与包括相同IP地址的其他路由。 具有相同IP地址的相同上下文（例如，在相同的虚拟专用网络或整个网络内）的路由被认为是指相同的目的地。 当这些路由与通过网络的不同路径相关联时，这些不同的路径可以用于转发与包括相同IP地址（在相同上下文中）的路由相关联的分组的流量，特别是响应于网络问题。
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75.发明授权Method and apparatus for managing forwarding of data in an autonomous system 有权用于管理自主系统中的数据转发的方法和装置公开(公告)号：US07855953B2
公开(公告)日：2010-12-21
申请号：US11254468
申请日：2005-10-20
IPC分类号： H04L12/26
CPC分类号： H04L45/22 , H04L12/4633 , H04L45/04 , H04L45/28 , H04L45/50
摘要： A method of managing forwarding of data in a first autonomous system (AS) is described. The first AS includes a plurality of border routers having inter-domain links to one or more remote AS's and an associated exterior communications protocol. The border routers use an interior communications protocol with other border routers in the first AS using primary tunnels. The method comprises the steps, performed at a first border router having a primary route via an inter-domain link to a remote AS, of constructing an alternate route to the remote AS via second border router in the first AS, instigating a backup tunnel to the second border router upon failure of the primary route and sending a failure message to the other border routers.
摘要翻译： 描述了在第一自治系统（AS）中管理数据转发的方法。 第一AS包括具有到一个或多个远程AS的域间链接和相关联的外部通信协议的多个边界路由器。 边界路由器使用内部通信协议与第一AS中的其他边界路由器使用主隧道。 该方法包括以下步骤：在具有通过到远程AS的域间链路的主路由的第一边界路由器上执行的步骤，通过第一AS中的第二边界路由器构建到远程AS的备用路由，将备用隧道引导到 主路由器故障时的第二个边界路由器，并向其他边界路由器发送故障消息。
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76.发明授权公开(公告)号：US07848240B2
公开(公告)日：2010-12-07
申请号：US10858920
申请日：2004-06-01
IPC分类号： G01R31/08
CPC分类号： H04L45/24 , H04L45/02 , H04L45/123 , H04L45/125 , H04L45/48 , H04L47/10 , H04L47/125
摘要： A method is disclosed of forwarding data in a data communications network comprising a plurality of nodes and links therebetween, each link having an associated usage cost and a load capacity. A forwarding node identifies a lowest cost route, comprising one or more links, to a destination node. If a plurality of lowest cost routes is identified, then the forwarding node allocates data for forwarding along each of the lowest cost routes dependent on a relative load capacity of that route.
摘要翻译： 公开了一种在数据通信网络中转发数据的方法，其中包括多个节点和链路之间的链路，每个链路具有相关联的使用成本和负载能力。 转发节点向目的地节点标识包括一个或多个链路的最低成本路由。 如果识别出多个最低成本路由，则转发节点根据该路由的相对负载能力分配用于沿每个最低成本路由转发的数据。
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77.发明授权Receiver-based construction of point-to-multipoint trees using path computation elements in a computer network 有权在计算机网络中使用路径计算元素的基于接收器的点对多点树的构造公开(公告)号：US07801137B2
公开(公告)日：2010-09-21
申请号：US12045749
申请日：2008-03-11
IPC分类号： H04L12/28
摘要： In one embodiment, a trigger to add a leaf node to a multicast group of a computer network is detected, and the leaf node may determine a root node of the multicast group to request a path between a tunnel tree and the leaf node of the multicast group. In response to the multicast group having an existing tree, a reply is received from the root node with a computed path to add the leaf node to the tree at a selected node of the tree. The leaf node may then be added to the multicast group tunnel tree over the computed path at the selected node.
摘要翻译： 在一个实施例中，检测到向计算机网络的多播组添加叶节点的触发器，并且叶节点可以确定多播组的根节点以请求隧道树和多播的叶节点之间的路径 组。 响应于具有现有树的多播组，使用计算的路径从根节点接收回复，以将叶节点添加到树的所选节点处的树。 然后可以通过所选节点处的计算路径将叶节点添加到多播组隧道树中。
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公开(公告)号：US07684316B2
公开(公告)日：2010-03-23
申请号：US12069709
申请日：2008-02-12
CPC分类号： H04L45/00 , H04L12/185 , H04L12/1868 , H04L12/1886 , H04L45/16 , H04L45/22 , H04L45/28
摘要： In one embodiment, a method includes receiving a multicast join message at a node having a plurality of interfaces, identifying the interface at which the join message was received, and selecting one or more of the interfaces to transmit the join message based on whether the join message was received on a ring interface. If the join message was received on one of the ring interfaces, the join message is transmitted on another of the interfaces. If the join message was not received on one of the ring interfaces, the join message is transmitted on both of the ring interfaces. The method further includes receiving multicast data and transmitting the multicast data on the interface at which the join message was received.
摘要翻译： 在一个实施例中，一种方法包括在具有多个接口的节点处接收多播加入消息，识别接收到加入消息的接口，以及基于该连接是否选择一个或多个接口来发送加入消息 在一个环形接口上收到消息。 如果在其中一个环形接口上收到加入消息，则在另一个接口上传输加入消息。 如果其中一个环接口没有收到加入消息，则在两个环形接口上都会发送加入消息。 该方法还包括接收组播数据，并在接收到加入消息的接口上发送组播数据。
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公开(公告)号：US20090296579A1
公开(公告)日：2009-12-03
申请号：US12130345
申请日：2008-05-30
IPC分类号： H04L12/56
CPC分类号： H04L12/4641
摘要： In one embodiment, one or more virtual private network (VPN) prefixes may be grouped at a network node into sets having shared network border node next-hop options, where each border node has a defined index value associated therewith. Also, a list of VPN labels associated with each VPN prefix may be maintained by the network node, where each VPN label is associated with a border node of a particular set by a corresponding index value. Further, the network node may determine a particular border node for traffic to be forwarded, along with the defined index value. The network node may then apply the index value to select an associated VPN label, and may affix the selected VPN label to the traffic for forwarding.
摘要翻译： 在一个实施例中，一个或多个虚拟专用网络（VPN）前缀可以在网络节点处被分组成具有共享网络边界节点下一跳选项的集合，其中每个边界节点具有与其相关联的定义的索引值。 此外，与每个VPN前缀相关联的VPN标签的列表可以由网络节点维护，其中每个VPN标签通过相应的索引值与特定集合的边界节点相关联。 此外，网络节点可以确定要转发的流量的特定边界节点以及所定义的索引值。 然后，网络节点可以应用索引值来选择相关联的VPN标签，并且可以将所选择的VPN标签附加到流量进行转发。
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公开(公告)号：US20090201803A1
公开(公告)日：2009-08-13
申请号：US12069709
申请日：2008-02-12
IPC分类号： G06F11/07
CPC分类号： H04L45/00 , H04L12/185 , H04L12/1868 , H04L12/1886 , H04L45/16 , H04L45/22 , H04L45/28
摘要： In one embodiment, a method includes receiving a multicast join message at a node having a plurality of interfaces, identifying the interface at which the join message was received, and selecting one or more of the interfaces to transmit the join message based on whether the join message was received on a ring interface. If the join message was received on one of the ring interfaces, the join message is transmitted on another of the interfaces. If the join message was not received on one of the ring interfaces, the join message is transmitted on both of the ring interfaces. The method further includes receiving multicast data and transmitting the multicast data on the interface at which the join message was received.
摘要翻译： 在一个实施例中，一种方法包括在具有多个接口的节点处接收多播加入消息，识别接收到加入消息的接口，以及基于该连接是否选择一个或多个接口来发送加入消息 在一个环形接口上收到消息。 如果在其中一个环形接口上收到加入消息，则在另一个接口上传输加入消息。 如果其中一个环接口没有收到加入消息，则在两个环形接口上都会发送加入消息。 该方法还包括接收组播数据，并在接收到加入消息的接口上发送组播数据。
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