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1. 发明授权

US07697416B2 Constructing a repair path in the event of non-availability of a routing domain 有权
标题翻译：在路由域不可用的情况下构建修复路径
公开(公告)号：US07697416B2
公开(公告)日：2010-04-13
申请号：US11518382
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
IPC分类号： H04L1/00 , H04L12/26 , H04L12/28 , H04L12/56
CPC分类号： H04L45/04 , H04L45/02 , H04L45/28
摘要： In one embodiment, an apparatus and method are described for constructing a repair path in the event of non-availability of a routing domain component of a routing domain comprising, as components, links and nodes. The apparatus is arranged to receive respective network repair addresses from each of the far-side and near-side advertising node for use in the event of non-availability of a routing domain component between the advertising node. The apparatus is further arranged to advertise the near-side advertising node network repair address to one or more far-side nodes via a path external to the routing domain.
摘要翻译：在一个实施例中，描述了在路由域的路由域组件的不可用性的情况下构建修复路径的装置和方法，该路由域组件包括作为组件的链路和节点。该装置被安排为从广播节点和广播节点之间的路由域组件不可用的情况下接收来自远侧和近侧广告节点的相应网络修复地址。该装置还被布置成经由路由域外部的路径将近侧广告节点网络修复地址通告给一个或多个远侧节点。

2. 发明申请

US20080219153A1 Constructing a repair path in the event of failure of an inter-routing domain system link 有权
标题翻译：在路由间域网系统链路故障的情况下构建修复路径
公开(公告)号：US20080219153A1
公开(公告)日：2008-09-11
申请号：US11518405
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Stefano B. Previdi , Robert Raszuk
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Stefano B. Previdi , Robert Raszuk
IPC分类号： G01R31/08
CPC分类号： H04L45/22 , H04L45/04 , H04L45/28
摘要： An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.
摘要翻译：描述的用于构建修复路径的装置和方法，用于在数据通信网络的第一和第二路由域中的各个组件之间的路由间域间连接发生故障的情况下使用。该装置被配置为分配可传播的修复地址，用于在路由间连接域连接失败的情况下使用，并且经由除了路由间连接之外的数据通信网络组件来传播修复地址。

3. 发明申请

US20080062861A1 Constructing a repair path in the event of non-availability of a routing domain 有权
标题翻译：在路由域不可用的情况下构建修复路径
公开(公告)号：US20080062861A1
公开(公告)日：2008-03-13
申请号：US11518382
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Robert Raszuk , Keyur Patel , Clarence Filsfils , Stefano B. Previdi
IPC分类号： H04J3/14
CPC分类号： H04L45/04 , H04L45/02 , H04L45/28
摘要： In one embodiment, an apparatus and method are described for constructing a repair path in the event of non-availability of a routing domain component of a routing domain comprising, as components, links and nodes. The apparatus is arranged to receive respective network repair addresses from each of the far-side and near-side advertising node for use in the event of non-availability of a routing domain component between the advertising node. The apparatus is further arranged to advertise the near-side advertising node network repair address to one or more far-side nodes via a path external to the routing domain.
摘要翻译：在一个实施例中，描述了在路由域的路由域组件的不可用性的情况下构建修复路径的装置和方法，该路由域组件包括作为组件的链路和节点。该装置被安排为从广播节点和广播节点之间的路由域组件不可用的情况下接收来自远侧和近侧广告节点的相应网络修复地址。该装置还被布置成经由路由域外部的路径将近侧广告节点网络修复地址通告给一个或多个远侧节点。

4. 发明授权

US08111616B2 Constructing a repair path in the event of failure of an inter-routing domain system link 有权
标题翻译：在路由间域网系统链路故障的情况下构建修复路径
公开(公告)号：US08111616B2
公开(公告)日：2012-02-07
申请号：US11518405
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , Gargi Nalawade , Robert Raszuk , Keyur Patel , Stefano B. Previdi , David D. Ward
发明人： Mike Shand , Stewart F. Bryant , Gargi Nalawade , Robert Raszuk , Keyur Patel , Stefano B. Previdi , David D. Ward
IPC分类号： G01R31/08 , G06F11/00
CPC分类号： H04L45/22 , H04L45/04 , H04L45/28
摘要： An apparatus and method as described for constructing a repair path for use in the event of failure of an inter-routing domain connection between respective components in first and second routing domains of a data communications network. The apparatus is arranged to assign a propagatable repair address for use in the event of failure of the inter-routing domain connection and to propagate the repair address via data communications network components other than the inter-routing domain connection.
摘要翻译：描述的用于构建修复路径的装置和方法，用于在数据通信网络的第一和第二路由域中的各个组件之间的路由间域间连接发生故障的情况下使用。该装置被配置为分配可传播的修复地址，用于在路由间连接域连接失败的情况下使用，并且经由除了路由间连接之外的数据通信网络组件来传播修复地址。

5. 发明授权

US07957306B2 Providing reachability information in a routing domain of an external destination address in a data communications network 有权
标题翻译：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
IPC分类号： H04L12/26 , H04L12/66 , G06F15/16
CPC分类号： H04L45/22 , H04L45/02 , H04L45/04 , H04L45/28
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。

6. 发明申请

US20080062986A1 Providing reachability information in a routing domain of an external destination address in a data communications network 有权
标题翻译：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：US20080062986A1
公开(公告)日：2008-03-13
申请号：US11518383
申请日：2006-09-08
申请人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Clarence Filsfils , Stefano B. Previdi , Robert Raszuk
发明人： Mike Shand , Stewart F. Bryant , David D. Ward , Gargi Nalawade , Keyur Patel , Clarence Filsfils , Stefano B. Previdi , Robert Raszuk
IPC分类号： H04L12/56
CPC分类号： H04L45/22 , H04L45/02 , H04L45/04 , H04L45/28
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 described. The apparatus is arranged to advertise destination address reachability internally to nodes in the routing domain and associate a reachability category with said internal advertisement of said destination address reachability.
摘要翻译：描述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 - 外部目的地地址之间的节点和链路之间的组件。该装置被布置为在内部向路由域中的节点通告目的地址可达性，并将可达性类别与所述目的地址可达性的所述内部广告相关联。

7. 发明申请

US20060203819A1 Small group multicast in a computer network 有权
标题翻译：计算机网络中的小组多播
公开(公告)号：US20060203819A1
公开(公告)日：2006-09-14
申请号：US11429699
申请日：2006-05-07
申请人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
发明人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L45/16 , H04L45/26 , H04L45/48
摘要： A data structure is stored in a memory of a router, the router located along a path between a source end station and a plurality of destination end stations in a multicast distribution tree. In response to receipt of trace packets containing a listing of network devices in the multicast distribution tree, the data structure is updated. When the source end station desires to send a multicast packet, it transmits a packet to the router. The router then writes the path information stored in the data structure into the packet. Such path information may include a tree list that specifies the arrangement of network devices along the multicast distribution tree and an address list that specifies the Internet Protocol (IP) addresses of these network devices along the multicast distribution tree. By storing the complete description of the network devices of the multicast distribution tree in the packet, routing demands on the devices along the multicast path are minimized.
摘要翻译：数据结构被存储在路由器的存储器中，路由器沿着源端站和多播分发树中的多个目的端站之间的路径定位。响应于在组播分发树中收到包含网络设备列表的跟踪包，更新数据结构。当源端站希望发送组播数据包时，会向路由器发送一个数据包。然后路由器将存储在数据结构中的路径信息写入分组。这种路径信息可以包括指定沿着多播分发树的网络设备的布置的树列表以及指定沿多播分发树的这些网络设备的因特网协议（IP）地址的地址列表。通过将组播分发树的网络设备的完整描述存储在分组中，对组播路径上的设备的路由需求最小化。

8. 发明授权

US07978718B2 Small group multicast in a computer network 有权
标题翻译：计算机网络中的小组多播
公开(公告)号：US07978718B2
公开(公告)日：2011-07-12
申请号：US11429699
申请日：2006-05-07
申请人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
发明人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L45/16 , H04L45/26 , H04L45/48
摘要： A data structure is stored in a memory of a router, the router located along a path between a source end station and a plurality of destination end stations in a multicast distribution tree. In response to receipt of trace packets containing a listing of network devices in the multicast distribution tree, the data structure is updated. When the source end station desires to send a multicast packet, it transmits a packet to the router. The router then writes the path information stored in the data structure into the packet. Such path information may include a tree list that specifies the arrangement of network devices along the multicast distribution tree and an address list that specifies the Internet Protocol (IP) addresses of these network devices along the multicast distribution tree. By storing the complete description of the network devices of the multicast distribution tree in the packet, routing demands on the devices along the multicast path are minimized.
摘要翻译：数据结构被存储在路由器的存储器中，路由器沿着源端站和多播分发树中的多个目的端站之间的路径定位。响应于在组播分发树中收到包含网络设备列表的跟踪包，更新数据结构。当源端站希望发送组播数据包时，会向路由器发送一个数据包。然后路由器将存储在数据结构中的路径信息写入分组。这种路径信息可以包括指定沿着多播分发树的网络设备的布置的树列表以及指定沿多播分发树的这些网络设备的因特网协议（IP）地址的地址列表。通过将组播分发树的网络设备的完整描述存储在分组中，对组播路径上的设备的路由需求最小化。

9. 发明授权

US07720019B1 Small group multicast in a computer network 有权
标题翻译：计算机网络中的小组多播
公开(公告)号：US07720019B1
公开(公告)日：2010-05-18
申请号：US11342388
申请日：2006-01-27
申请人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
发明人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
IPC分类号： H04H20/71 , H04L12/56 , H04J3/26
CPC分类号： H04L45/00 , H04L45/16 , H04L45/26 , H04L45/48
摘要： A network packet is encapsulated and has at least one field in the header of the encapsulation. A multicast delivery tree is written into a field of the encapsulating header. A method for operating a router to use the multicast delivery tree encapsulated in the header of the network packet has the following steps. The router receives a packet from a computer network, the packet having an encapsulated field. The router then reads a multicast delivery tree from the encapsulated field, the multicast delivery tree having a route to each of a plurality of destination stations. Then, the router forwards the packet to an address selected in response to the multicast delivery tree.
摘要翻译：网络数据包被封装，并且在封装的头部中至少有一个字段。多播递送树被写入封装头部的一个字段中。一种用于操作路由器以使用封装在网络分组报头中的多播递送树的方法具有以下步骤。路由器从计算机网络接收分组，该分组具有封装的字段。然后，路由器从封装字段读取多播递送树，该多播递送树具有到多个目的地站中的每一个的路由。然后，路由器将数据包转发到响应多播传递树选择的地址。

10. 发明授权

US07016351B1 Small group multicast in a computer network 有权
标题翻译：计算机网络中的小组多播
公开(公告)号：US07016351B1
公开(公告)日：2006-03-21
申请号：US09515295
申请日：2000-02-29
申请人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
发明人： Dino Farinacci , Joel Bion , Alex Tweedly , Mike Shand
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L45/16 , H04L45/26 , H04L45/48
摘要： The invention solves the problem of overloading intermediate routers with state information as the number of multicast groups increases to millions of groups. The invention places multicast delivery tree information in the header of an encapsulated multicast packet, thereby relieving the routers from maintaining any state information about the multicast groups. The encapsulated packet is referred to as a small group multicast packet, or SGM packet. Routers which are neither branch points of the delivery tree nor destination routers will also need to do no additional forwarding processing other than that needed for standard unicast forwarding. A protocol designation field in the Layer 3 header informs the router that the packet is a SGM packet, and that the router is therefore instructed to parse the packet for route information. The router parses the SGM packet header and determines the next hop address of routers in the multicast delivery tree. The standard unicast forwarding tables are then consulted to determine the next packet destination addresses, and the router then rewrites the SGM packet and routes it to the next hop router. The routing tables also instruct the router as to which outbound port to route the packet.
摘要翻译：本发明解决了随着组播组数量增加到数百万组的状态信息，中继路由器过载的问题。本发明将组播传递树信息放在封装的组播数据包的报头中，从而减轻了路由器维护关于组播组的任何状态信息。被封装的数据包称为小组组播数据包或SGM数据包。既不是传送树的分支点也不是目标路由器的路由器也不需要除了标准单播转发所需的以外的其他转发处理。三层头部中的协议指定字段通知路由器该分组是SGM分组，并且因此指示路由器分析路由信息的分组。路由器解析SGM报文头，并确定组播传递树中路由器的下一跳地址。然后查询标准单播转发表以确定下一个分组目的地址，然后路由器重写SGM分组并将其路由到下一跳路由器。路由表还指示路由器对哪个出站端口进行路由。

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