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1. 发明申请

US20070097973A1 Method and apparatus for prioritized processing of routing information 有权
标题翻译：优先处理路由信息的方法和装置
公开(公告)号：US20070097973A1
公开(公告)日：2007-05-03
申请号：US11262060
申请日：2005-10-28
申请人： John Scudder , David Ward , Paul Jensen
发明人： John Scudder , David Ward , Paul Jensen
IPC分类号： H04L12/56 , H04J3/22 , H04L12/28 , H04J3/16
CPC分类号： H04L45/00 , H04L45/54
摘要： A method is disclosed for prioritized processing of routing information in a network element. A priority is assigned to routing information received at the network element. The priority and the routing information are stored in a Routing Information Base (RIB) of the network element. The routing information is transferred from the RIB to a Forwarding Information Base (FIB) of the network element according to the priority assigned to the network element.
摘要翻译：公开了一种用于在网络元件中优先处理路由信息的方法。优先级被分配给在网元接收的路由信息。优先级和路由信息存储在网元的路由信息库（RIB）中。路由信息根据分配给网元的优先级从RIB传送到网元的转发信息库（FIB）。

2. 发明申请

US20070091796A1 Method of implementing a backup path in an autonomous system 有权
标题翻译：在自治系统中实现备份路径的方法
公开(公告)号：US20070091796A1
公开(公告)日：2007-04-26
申请号：US11254609
申请日：2005-10-20
申请人： Clarence Filsfils , Stewart Bryant , Ian Shand , David Ward , John Scudder
发明人： Clarence Filsfils , Stewart Bryant , Ian Shand , David Ward , John Scudder
IPC分类号： H04J3/14
CPC分类号： H04L45/00 , H04L45/18 , H04L45/22 , H04L45/28
摘要： A method of implementing a backup path in an autonomous system (AS) for failure of an inter-AS link is described. The method comprises forwarding data elements destined for the failed link via a backup path and including a loop prevention attribute in the packet.
摘要翻译：描述了在自治系统（AS）中实现AS间链路故障的备用路径的方法。该方法包括经由备份路径转发去往故障链路的数据元素，并在分组中包括环路防止属性。

3. 发明申请

US20070091795A1 Method of constructing a backup path in an autonomous system 有权
标题翻译：在自治系统中构建备份路径的方法
公开(公告)号：US20070091795A1
公开(公告)日：2007-04-26
申请号：US11254587
申请日：2005-10-20
申请人： Olivier Bonaventure , Pierre Francois , Clarence Filsfils , Stewart Bryant , David Ward , John Scudder , Stefano Previdi , Ian Shand , Gargi Nalawade
发明人： Olivier Bonaventure , Pierre Francois , Clarence Filsfils , Stewart Bryant , David Ward , John Scudder , Stefano Previdi , Ian Shand , Gargi Nalawade
IPC分类号： H04J3/14 , H04L12/56
CPC分类号： H04L45/22 , H04L45/04 , H04L45/28 , H04L2212/00
摘要： A method of constructing a backup path in an autonomous system (AS) for failure of an inter-AS link is described. The method comprises identifying an alternate inter-AS path and constructing a tunnel to an end point on the alternate path.
摘要翻译：描述了在自治系统（AS）中构建用于AS间链路故障的备用路径的方法。该方法包括识别替代的AS间路径并构建到备用路径上的终点的隧道。

4. 发明申请

US20070091794A1 Method of constructing a backup path in an autonomous system 审中-公开
标题翻译：在自治系统中构建备份路径的方法
公开(公告)号：US20070091794A1
公开(公告)日：2007-04-26
申请号：US11254469
申请日：2005-10-20
申请人： Clarence Filsfils , Stewart Bryant , David Ward , John Scudder , Stefano Previdi , Ian Charles Shand , Gargi Nalawade
发明人： Clarence Filsfils , Stewart Bryant , David Ward , John Scudder , Stefano Previdi , Ian Charles Shand , Gargi Nalawade
IPC分类号： H04J3/14 , H04L12/56
CPC分类号： H04L45/22 , H04L12/66 , H04L45/04 , H04L45/28 , H04L45/50
摘要： A method of constructing a backup path in an autonomous system (AS) for failure of a first inter-AS link serving a first set of prefixes is described. The method comprises identifying an alternate inter-AS link serving said plurality of prefixes and constructing a tunnel thereto.
摘要翻译：描述了在自治系统（AS）中构建用于服务于第一组前缀的第一AS间链路故障的备用路径的方法。该方法包括：识别服务于所述多个前缀的替代的AS间链路，并构建一个隧道。

5. 发明申请

US20060221813A1 Loop prevention techniques using encapsulation manipulation of IP/MPLS field 有权
标题翻译：使用IP / MPLS领域的封装处理的环路预防技术
公开(公告)号：US20060221813A1
公开(公告)日：2006-10-05
申请号：US11098173
申请日：2005-04-04
申请人： John Scudder , David Ward , Clarence Filsfils
发明人： John Scudder , David Ward , Clarence Filsfils
IPC分类号： H04L12/56 , H04J1/16 , H04J3/14 , G08C15/00 , H04L12/28
CPC分类号： H04L45/22 , H04L45/02 , H04L45/28 , H04L45/50 , H04L47/2408
摘要： A fast reroute (FRR) technique is implemented at the edge of a computer network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being “protected” (i.e., rerouted) data packets before they are forwarded to the backup edge device. To that end, the edge device incorporates an identifier into the rerouted data packets to indicate that the packets are being FRR rerouted. The identifier may be a predetermined value stored at a known location in the rerouted packets'encapsulation headers, such as in their MPLS or IP headers. Upon receiving a data packet containing the identifier, the backup edge device is not permitted to reroute the packet a second time.
摘要翻译：在计算机网络的边缘实现快速重路由（FRR）技术。根据该技术，如果边缘设备检测到阻止其与相邻路由域通信的节点或链路故障，则边缘设备将至少一些寻址到该域的数据分组重新路由到备用边缘设备，将数据包转发到相邻域。重新路由的数据包在被转发到备份边缘设备之前被指定为“保护”（即重新路由）数据分组。为此，边缘设备将重新路由的数据分组中的标识符合并，以指示分组正在被FRR重新路由。标识符可以是存储在重新路由的分组的封装报头中的已知位置的预定值，例如在其MPLS或IP报头中。在接收到包含标识符的数据分组时，不允许备份边缘设备再次重新路由该分组。

6. 发明申请

US20060209851A1 Method and apparatus for border gateway protocol route management and routing policy modeling 有权
公开(公告)号：US20060209851A1
公开(公告)日：2006-09-21
申请号：US11073351
申请日：2005-03-04
申请人： John Scudder , David Ward , Thomas Barron
发明人： John Scudder , David Ward , Thomas Barron
IPC分类号： H04L12/56 , H04L12/28
CPC分类号： H04L45/22 , H04L45/02 , H04L45/04 , H04L45/308 , H04L45/54
摘要： A method and apparatus is described for Border Gateway Protocol (BGP) route management and routing policy modeling. In one aspect, the performance of one or more actions associated with one or more routes is disallowed. One or more routing policies associated with the one or more routes are configured. The performance of the one or more actions is then allowed. In one feature of the aspect, the one or more actions comprise forwarding packets on the one or more routes. The one or more actions may also comprise advertising the one or more routes to BGP peers.

7. 发明申请

US20060106934A1 Communication arrangement between virtual routers of a physical router 有权
标题翻译：物理路由器的虚拟路由器之间的通信安排
公开(公告)号：US20060106934A1
公开(公告)日：2006-05-18
申请号：US10992499
申请日：2004-11-18
申请人： Rodolphe Figaro , David Ward , Anca Zamfir , John Scudder
发明人： Rodolphe Figaro , David Ward , Anca Zamfir , John Scudder
IPC分类号： G06F15/16 , G06F15/173
CPC分类号： H04L45/00 , H04L45/586
摘要： A virtual router (VR) communication arrangement enables services on different VRs executing on the same physical router to communicate without utilizing or substantially consuming communication resources, such as a network protocol stack and physical interfaces, of the physical router. The services are illustratively implemented as separately-scheduled VR processes executing on the physical router. A virtual router forwarding information base (vrFIB) is provided within a client socket library of each VR process and is used to determine whether the services are on the same physical router. If so, a lightweight interconnection is created between the services and a message (“packet”) is forwarded over that interconnection to effectuate communication. If the services are not on the same physical router, the packet is sent over the network protocol stack and communication is established using the communication resources of the router.
摘要翻译：虚拟路由器（VR）通信布置使得在相同物理路由器上执行的不同VR上的服务能够在不利用或基本上消耗物理路由器的诸如网络协议栈和物理接口的通信资源的情况下进行通信。这些服务被说明性地实现为在物理路由器上执行的单独调度的VR进程。虚拟路由器转发信息库（vrFIB）在每个VR进程的客户机套接字库中提供，用于确定服务是否在同一物理路由器上。如果是这样，则在服务之间创建轻量级互连，并且通过该互连转发消息（“分组”）以实现通信。如果业务不在同一物理路由器上，则通过网络协议栈发送数据包，并使用路由器的通信资源建立通信。

8. 发明申请

US20070086461A1 Method for recovery of a controlled failover of a border gateway protocol speaker 有权
标题翻译：恢复边界网关协议扬声器受控故障转移的方法
公开(公告)号：US20070086461A1
公开(公告)日：2007-04-19
申请号：US11253119
申请日：2005-10-17
申请人： David Ward , John Scudder
发明人： David Ward , John Scudder
IPC分类号： H04L12/56
CPC分类号： H04L45/28 , H04L45/04 , H04L45/58 , H04L45/60 , H04L69/16 , H04L69/163 , H04L69/40
摘要： A method and apparatus for recovering from a controlled failover of a BGP speaker is provided. A user sends, to a network element, a request to switch a designation of an active Border Gateway Protocol (BGP) speaker of the network element from a first BGP speaker to a second BGP speaker. After receiving the request, the network element pauses operation of a transport for BGP. Routing data, which describes a state of a first routing information base (RIB) maintained by the active BGP speaker, is transferred from the first BGP speaker to the second BGP speaker. Thereafter, the first BGP speaker may instruct the second BGP speaker to become the active BGP speaker. After the second BGP speaker becomes the active BGP speaker, the second BGP speaker resumes operation of the BGP transport.
摘要翻译：提供了一种用于从BGP扬声器的受控故障转移中恢复的方法和装置。用户向网络单元发送将网元的主动边界网关协议（BGP）扬声器的指定从第一BGP扬声器切换到第二BGP扬声器的请求。接收到请求后，网元暂停运行BGP。描述由主动BGP扬声器维护的第一路由信息库（RIB）的状态的路由数据从第一BGP发言者传送到第二BGP发言者。此后，第一个BGP扬声器可以指示第二个BGP扬声器成为主动的BGP扬声器。第二个BGP扬声器成为主动BGP扬声器后，第二个BGP扬声器恢复BGP传输的运行。

9. 发明申请

US20060126496A1 Fast reroute (FRR) protection at the edge of a RFC 2547 network 有权
公开(公告)号：US20060126496A1
公开(公告)日：2006-06-15
申请号：US11010225
申请日：2004-12-10
申请人： Clarence Filsfils , Stefano Previdi , John Scudder , David Ward , Jean-Philippe Vasseur , Jim Guichard
发明人： Clarence Filsfils , Stefano Previdi , John Scudder , David Ward , Jean-Philippe Vasseur , Jim Guichard
IPC分类号： H04L12/26
CPC分类号： H04L45/28 , H04L45/02 , H04L45/04 , H04L45/22 , H04L45/50
摘要： A fast reroute (FRR) technique that may be deployed at the edge of a network having first and second edge devices coupled to a neighboring routing domain. If the first edge device detects a node or link failure that prevents it from communicating with the neighboring domain, the first edge device reroutes at least some data packets addressed to the neighboring domain to the second edge device. The second edge device receives the rerouted packets and then forwards the packets to the neighboring domain. Notably, the second edge device is not permitted to reroute the received packets a second time, e.g., upon identifying another inter-domain node or link failure. As such, loops are avoided at the edge of the network and packets are rerouted to the neighboring routing domain faster and more efficiently than in prior implementations.

10. 发明申请

US20050177634A1 Technique for graceful shutdown of a routing protocol in a network 有权
标题翻译：网络中路由协议正常关闭的技术
公开(公告)号：US20050177634A1
公开(公告)日：2005-08-11
申请号：US10775877
申请日：2004-02-10
申请人： John Scudder , Muthurajah Sivabalan , David Ward
发明人： John Scudder , Muthurajah Sivabalan , David Ward
IPC分类号： G06F15/16 , G06F15/173 , H04L12/56
CPC分类号： H04L45/02 , H04L45/22
摘要： A graceful shutdown technique modifies a routing protocol to allow an intermediate node, such as a router, to announce to its peer routers (peers) its intention to be gracefully shutdown and removed from service in a network. By announcing its intention to be removed from service, the shutdown router closes (terminates) all connections with its peers and all original routes advertised on those connections are removed (withdrawn) from service. According to the inventive technique, the shutdown router may continue forwarding packets over the network for a “grace” period of time, i.e., the router maintains the validity of those original routes so that packets mapped to the routes are not dropped (at least during the grace period). The grace period also allows backup paths to be propagated to each peer and put into service prior to a final withdrawal of the shutdown router's paths from a forwarding information base of the peer. Thus, the grace period enables the network to continue using the shutdown router as a next hop as it re-converges to use the alternate, backup paths.
摘要翻译：优雅的关机技术修改路由协议，允许诸如路由器之类的中间节点向其对等路由器（对等体）通告其意图被正常关闭并从网络中的服务中删除。关闭路由器通过宣布将其从服务中删除，关闭（终止）与对等体的所有连接，并将从这些连接发布的所有原始路由从服务中删除（撤销）。根据本发明的技术，关闭路由器可以在“宽限”时间段内继续通过网络转发分组，即，路由器保持那些原始路由的有效性，使得映射到路由的分组不被丢弃（至少在宽限期）。宽限期还允许将备份路径传播到每个对等体，并在关闭路由器的路径从对等体的转发信息库最后提取之前投入使用。因此，宽限期允许网络在重新收敛以使用备用路径时继续使用关闭路由器作为下一跳。

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