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    Avoiding Micro-loops in a Ring Topology of a Network
    4.
    发明申请
    Avoiding Micro-loops in a Ring Topology of a Network 审中-公开
    避免网络环形拓扑中的微环路

    公开(公告)号：US20150288536A1

    公开(公告)日：2015-10-08

    申请号：US14743715

    申请日：2015-06-18

    申请人： Stewart Frederick Bryant ,  Clarence Filsfils ,  Ian Michael Charles Shand

    发明人： Stewart Frederick Bryant ,  Clarence Filsfils ,  Ian Michael Charles Shand

    IPC分类号： H04L12/437 ,  H04L12/703 ,  H04L12/427 ,  H04L12/26

    CPC分类号： H04L12/437 ,  H04L12/427 ,  H04L43/0811 ,  H04L45/18 ,  H04L45/28

    摘要： In one embodiment, micro-loops are avoided in ring topologies of packet switching devices by changing the order of propagation of link state information concerning failed communications between a particular packet switching device and a neighbor packet switching device. In one embodiment, the particular packet switching device communicates link state information of a high cost of the particular communications (e.g., in the direction from particular to neighbor packet switching devices) such that this link state information will propagate towards the particular packet switching device from at least from the furthest packet switching device in the ring topology that is currently configured to forward packets having a destination address of the neighbor packet switching device through the particular packet switching device.

    摘要翻译： 在一个实施例中，通过改变关于特定分组交换设备和相邻分组交换设备之间的故障通信的链路状态信息的传播顺序来避免分组交换设备的环形拓扑中的微环路。 在一个实施例中，特定分组交换设备传送特定通信的高成本（例如，从特定到相邻分组交换设备的方向）的链路状态信息，使得该链路状态信息将向特定分组交换设备传播 至少来自当前配置为通过特定分组交换设备转发具有相邻分组交换设备的目的地地址的分组的环形拓扑中的最远分组交换设备。

    Constructing a transition route in a data communication network
    5.
    发明授权
    Constructing a transition route in a data communication network 有权
    在数据通信网络中构建转换路由

    公开(公告)号：US08238232B2

    公开(公告)日：2012-08-07

    申请号：US11968499

    申请日：2008-01-02

    申请人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

    发明人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

    IPC分类号： H04J1/16 ,  H04J3/14

    CPC分类号： H04L45/18 ,  H04L45/00 ,  H04L45/02 ,  H04L45/22 ,  H04L45/28 ,  H04L45/48 ,  H04L2212/00

    摘要： A method is described of constructing a transition route in a data communication network having as components nodes and links. Upon receipt of a transition notification identifying a first component a non-neighboring node constructs a transition route around the first component. In an embodiment, a node performs detecting the first component transition; issuing a transition notification identifying the first component and recognizable by nodes configured to construct a transition route around the first component; and upon expiry of a notification transition period, issuing a transition advertisement recognizable by all nodes on the network.

    摘要翻译： 描述了在具有节点和链路的组件的数据通信网络中构建转换路由的方法。 当接收到标识第一组件的转换通知时，非相邻节点构成围绕第一组件的转换路径。 在一个实施例中，节点执行检测第一分量转换; 发出标识所述第一组件的转换通知，并且可被被配置为围绕所述第一组件构建转换路径的节点识别; 并且在通知转换期限届满时，发布由网络上的所有节点可识别的转换广告。

    Forwarding data in a data communication network
    6.
    发明授权
    Forwarding data in a data communication network 有权
    在数据通信网络中转发数据

    公开(公告)号：US07920566B2

    公开(公告)日：2011-04-05

    申请号：US11788106

    申请日：2007-04-18

    申请人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

    发明人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

    IPC分类号： H04L12/28

    CPC分类号： H04L45/22 ,  H04L45/02 ,  H04L45/28 ,  H04L45/50 ,  H04L45/507

    摘要： An apparatus for forwarding data in a data communications network having as components nodes and links therebetween is described. The apparatus is arranged to forward data towards a destination on a label switched path and advertise in a label advertisement to nodes in the network in a label advertisement its label for the label switched path and its label for a repair label switched path for use in the event of non availability of a component in the network. The apparatus is further arranged to advertise to a remote node in the network in a label advertisement additional information for deriving repair label switched path information at the remote node.

    摘要翻译： 描述了一种用于在数据通信网络中转发数据的装置，其具有作为其间的节点和链路的组件。 该设备被布置为在标签交换路径上向目的地转发数据，并且在标签广告中向标签广告中的节点通告标签公告其标签交换路径的标签及其用于维护标签交换路径的标签 网络中组件不可用的事件。 所述装置还被布置为在标签广告中向网络中的远程节点通告用于在远程节点处导出修复标签交换路径信息的附加信息。

    Constructing repair paths around multiple non-available links in a data communications network
    7.
    发明授权
    Constructing repair paths around multiple non-available links in a data communications network 有权
    围绕数据通信网络中的多个不可用链路构建修复路径

    公开(公告)号：US07852751B2

    公开(公告)日：2010-12-14

    申请号：US12032274

    申请日：2008-02-15

    申请人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

    发明人： Stewart Frederick Bryant ,  Ian Michael Charles Shand

    IPC分类号： H04L12/26

    CPC分类号： H04L45/18 ,  H04L45/02 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

    摘要： A data processing apparatus is configured for initiating a not-via approach for creating repair path information for a first link between the first network node and a second network node; creating a list of other network nodes that the not-via repair path traverses; creating and storing entries in the FIB identifying repair addresses for the network nodes and that cause (a) packets directed to all addresses normally reachable through the first link to be encapsulated to the second node not via the first node, (b) packets directed to a not-via address that is normally reachable through the first link to be encapsulated to the second node not via the first node, and (c) dropping packets directed to a not-via address that is normally reachable through the first link when the not-via address is in the list; repeating the preceding steps for all other links of the first network node.

    摘要翻译： 数据处理装置被配置为启动用于为第一网络节点和第二网络节点之间的第一链路创建修复路径信息的非通路方法; 创建非通路修复路径穿过的其他网络节点的列表; 创建和存储FIB中的条目，以识别网络节点的修复地址，并导致（a）指向通过第一链路正常可到达的所有地址的分组，而不是经由第一节点封装到第二节点;（b）指向 通常可通过第一链路到达不通过第一节点封装到第二节点的非通过地址，以及（c）丢弃通过第一链路正常可到达的非通过地址的分组， -via地址在列表中; 对第一网络节点的所有其他链路重复前述步骤。

    Forwarding data in a data communications network
    9.
    发明授权
    Forwarding data in a data communications network 有权
    在数据通信网络中转发数据

    公开(公告)号：US09350639B2

    公开(公告)日：2016-05-24

    申请号：US11851255

    申请日：2007-09-06

    申请人： Ian Michael Charles Shand ,  Stewart Frederick Bryant

    发明人： Ian Michael Charles Shand ,  Stewart Frederick Bryant

    IPC分类号： H04L12/26 ,  H04L12/70 ,  H04L12/24 ,  H04L12/701 ,  H04L12/707 ,  H04L12/703 ,  H04L12/723

    CPC分类号： H04L45/00 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

    摘要： In an embodiment, an apparatus for forwarding data in a data communications network having as components nodes and links therebetween comprises a network interface configured to couple to a data communications network having as components nodes and links therebetween; first logic which when executed is operable to receive a repair address; second logic which when executed is operable to compute a repair path from a repairing node to the repair address around a failure component on a primary forwarding path between the apparatus and a repairing node; and third logic which when executed is operable to propagate the repair address along a label switched path (LSP), comprising the repair path, to the repairing node. The apparatus offers improved efficiency in computing a repair path in a network around a failed component because unnecessary computations are not performed with the disclosed apparatus and approach.

    摘要翻译： 在一个实施例中，一种用于在数据通信网络中转发数据的装置，具有作为其组件的节点和链路之间的组件，包括被配置为耦合到数据通信网络的网络接口，所述数据通信网络具有作为其间的 第一逻辑，当执行时可操作以接收修复地址; 第二逻辑，其被执行时可操作以计算从修复节点到设备与修复节点之间的主转发路径上的故障组件周围的修复地址的修复路径; 以及第三逻辑，其在执行时可操作以沿着包括修复路径的标签交换路径（LSP）将修复地址传播到修复节点。 该设备提高了在故障组件周围的网络中计算修复路径的效率，因为不会用所公开的设备和方法进行不必要的计算。