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111. 发明授权

US08238338B2 Interior gateway protocol summarization preserving internet protocol reachability information 有权
标题翻译：内部网关协议汇总，保留互联网协议可达性信息
公开(公告)号：US08238338B2
公开(公告)日：2012-08-07
申请号：US12111336
申请日：2008-04-29
申请人： George L. Swallow , Clarence Filsfils , James N. Guichard
发明人： George L. Swallow , Clarence Filsfils , James N. Guichard
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/04 , H04L45/02
摘要： In one example embodiment, a system and method is illustrated that includes receiving connectivity data for at least one network device, the connectivity data describing a connection to the at least one network device within an area. The system and method further includes processing the connectivity data to obtain a routing update for distribution to another network device outside the area. Additionally, the system and method includes a routing summary in the routing update, the routing summary including an address prefix. Further, the system and method includes reachability information in the routing update, the reachability information including an address for the at least one network device.
摘要翻译：在一个示例实施例中，示出了包括为至少一个网络设备接收连接数据的系统和方法，所述连接性数据描述与区域内的至少一个网络设备的连接。该系统和方法还包括处理连通性数据以获得路由更新以分发给该区域外的另一网络设备。此外，系统和方法包括路由更新中的路由摘要，路由摘要包括地址前缀。此外，系统和方法包括路由更新中的可达性信息，可达性信息包括用于至少一个网络设备的地址。

112. 发明申请

US20110228785A1 AUTOMATIC ROUTE TAGGING OF BGP NEXT-HOP ROUTES IN IGP 有权
标题翻译： BGP下一个路由器的自动路由标记
公开(公告)号：US20110228785A1
公开(公告)日：2011-09-22
申请号：US13149535
申请日：2011-05-31
申请人： Clarence Filsfils , Stefano B. Previdi , Jean-Philippe Vasseur
发明人： Clarence Filsfils , Stefano B. Previdi , Jean-Philippe Vasseur
IPC分类号： H04L12/28
CPC分类号： H04L45/04 , H04L45/02 , H04L45/026 , H04L45/28 , H04L45/52
摘要： In one embodiment, a router in a routing domain exchanges routing information with one or more other routers located external to the routing domain using an exterior gateway protocol (EGP). The router exchanges routing information with one or more other routers located internal to the routing domain using an interior gateway protocol (IGP). The router detects a route to be advertised by the IGP is also used as a next-hop attribute of a route advertised by the EGP. In response, the router tags the route advertised by the IGP as an important route for convergence to indicate that the tagged route is to be processed before other routes that have not been tagged during convergence processing. The tagged route is advertised within the routing domain using the IGP.
摘要翻译：在一个实施例中，路由域中的路由器使用外部网关协议（EGP）与位于路由域外部的一个或多个其他路由器交换路由信息。路由器使用内部网关协议（IGP）与位于路由域内部的一个或多个其他路由器交换路由信息。路由器检测到IGP发布的路由也被用作EGP发布的路由的下一跳属性。作为响应，路由器将IGP发布的路由标记为收敛的重要路由，以指示在收敛处理期间未标记的其他路由之前要标记的路由将被处理。使用IGP在路由域内通告标记的路由。

113. 发明授权

US07983153B2 Fast reroute (FRR) protection at the edge of a RFC 2547 network 有权
标题翻译：在RFC 2547网络边缘的快速重路由（FRR）保护
公开(公告)号：US07983153B2
公开(公告)日：2011-07-19
申请号：US12481411
申请日：2009-06-09
申请人： Clarence Filsfils , Stefano B. Previdi , John Galen Scudder , David D. Ward , Jean-Philippe Vasseur , Jim Guichard
发明人： Clarence Filsfils , Stefano B. Previdi , John Galen Scudder , David D. Ward , Jean-Philippe Vasseur , Jim Guichard
IPC分类号： H04J1/16 , H04J3/14 , H04L1/00 , H04L12/26
CPC分类号： H04L45/28 , H04L45/02 , H04L45/04 , H04L45/22 , H04L45/50
摘要： In one embodiment, an edge device in a first routing domain is configured to communicate with a second routing domain via a data link. The edge device receives a data packet containing a destination address that is reachable via the second routing domain and an indication that the data packet is a protected packet that was previously rerouted from another edge device in the first routing domain via a Multi-Protocol Label Switching (MPLS) Fast Reroute (FRR) backup path. The edge device determines if communication with the second routing domain is still available via the data link, and if so, removes the indication that the data packet is a protected packet and forwards the data packet to the second routing domain, and, if not, drops the data packet to prevent the data packet from being rerouted a second time in the first routing domain on another MPLS FRR backup path.
摘要翻译：在一个实施例中，第一路由域中的边缘设备被配置为经由数据链路与第二路由域进行通信。边缘设备接收包含经由第二路由域可到达的目的地地址的数据分组，以及指示数据分组是先前通过多协议标签交换在第一路由域中从另一边缘设备重新路由的受保护分组的指示（MPLS）快速重路由（FRR）备份路径。边缘设备确定与第二路由域的通信是否仍然通过数据链路可用，如果是，则删除数据分组是受保护分组的指示，并将数据分组转发到第二路由域，如果不是，删除数据包，以防止数据包在另一个MPLS FRR备份路径上的第一个路由域再次被重新路由。

114. 发明授权

US07916729B2 Automatic RD rewrite technique to achieve fast convergence in inter-as networks 有权
标题翻译：自动RD重写技术，实现网络间快速收敛
公开(公告)号：US07916729B2
公开(公告)日：2011-03-29
申请号：US12241445
申请日：2008-09-30
申请人： Pradosh Kumar Mohapatra , Clarence Filsfils , James Neil Guichard , Eric Rosen
发明人： Pradosh Kumar Mohapatra , Clarence Filsfils , James Neil Guichard , Eric Rosen
IPC分类号： H04L12/28
CPC分类号： H04L45/22 , H04L12/4641 , H04L45/04
摘要： A virtual private network (VPN) is formed with a pair of autonomous systems (ASes) connected by each having at least two autonomous system border routers (ASBRs) connected to the corresponding ASBRs at the other AS, referred to as an Option B VPN-IPv4 network. Route reflectors (RRs) only reflect the best Border Gateway Protocol (BGP) paths, providing no backup BGP paths for fast convergence. Advantageously, an automatic route distinguisher (RD) rewrite component at the ASBRs creates unique prefixes and advertises the original RD as transitive attribute in an update message to external AS peers. Each RD gets mapped to another unique prefix at the ASBR and also that two ASBRs will create different unique prefixes. Thus, the route reflector sees different prefixes and reflects all of them. The ingress provider edge (PE) router can import the prefixes and correctly obtain the alternate paths for fast convergence.
摘要翻译：虚拟专用网络（VPN）形成有一对自主系统（AS），每个自治系统（AS）连接有至少两个自主系统边界路由器（ASBR），这两个自治系统边界路由器（ASBR）连接到另一个AS的对应ASBR，称为选项B VPN- IPv4网络。路由反射器（RR）仅反映最佳的边界网关协议（BGP）路径，不提供用于快速收敛的备份BGP路径。有利的是，ASBR上的自动路由识别器（RD）重写组件创建唯一的前缀，并将原始RD作为更新消息中的传递属性通告给外部AS对等体。每个RD映射到ASBR的另一个唯一前缀，并且两个ASBR将创建不同的唯一前缀。因此，路由反射器看到不同的前缀并且反映所有前缀。入口提供商边缘（PE）路由器可以导入前缀并正确获取备用路径以实现快速收敛。

115. 发明授权

US07885259B2 Deterministic multiprotocol label switching (MPLS) labels 有权
标题翻译：确定性多协议标签交换（MPLS）标签
公开(公告)号：US07885259B2
公开(公告)日：2011-02-08
申请号：US11948024
申请日：2007-11-30
申请人： Clarence Filsfils
发明人： Clarence Filsfils
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/00 , H04L45/50
摘要： Disclosed are, inter alia, methods, apparatus, computer-readable media, mechanisms, and means for deterministically determining MPLS labels as functions of addresses of Forwarding Equivalence Classes (FECs), and using these determined labels in the forwarding of packets. By each packet switching device in a network deterministically determining the same MPLS label to use for each FEC, each packet switching device knows what label will be used by the other packet switching devices, without running Label Distribution Protocol (LDP) or another label publishing protocol. Additionally, this knowledge extends to all packet switching devices in a network, not merely neighboring packet switching devices, which allows a packet switching device to specify a stack of labels to define a desired path through the network for explicit path routing and/or fast rerouting of traffic without having to previously establish a tunnel or path using Resource Reservation Protocol (RSVP), for example.
摘要翻译：公开了用于将MPLS标签确定性地确定为转发等价类（FEC）的地址的功能的方法，装置，计算机可读介质，机制和装置，并且在转发数据包中使用这些确定的标签。通过网络中的每个分组交换设备确定地确定用于每个FEC的相同的MPLS标签，每个分组交换设备知道其他分组交换设备将使用什么标签，而不运行标签分发协议（LDP）或另一标签发布协议。此外，该知识扩展到网络中的所有分组交换设备，而不仅仅是相邻分组交换设备，其允许分组交换设备指定一组标签，以通过网络定义用于显式路由路由和/或快速重路由的期望路径的流量，而不必例如使用资源预留协议（RSVP）先前建立隧道或路径。

116. 发明授权

US07864669B2 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：US07864669B2
公开(公告)日：2011-01-04
申请号：US11254587
申请日：2005-10-20
申请人： Olivier Bonaventure , Pierre Francois , Clarence Filsfils , Stewart Bryant , David D. Ward , John Galen Scudder , Stefano B. Previdi , Ian Michael Charles Shand , Gargi Nalawade
发明人： Olivier Bonaventure , Pierre Francois , Clarence Filsfils , Stewart Bryant , David D. Ward , John Galen Scudder , Stefano B. Previdi , Ian Michael Charles Shand , Gargi Nalawade
IPC分类号： H04L12/26
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。

117. 发明申请

US20100309919A1 LABEL DISTRIBUTION PROTOCOL LABEL FILTERING 有权
标题翻译：标签分配协议标签过滤
公开(公告)号：US20100309919A1
公开(公告)日：2010-12-09
申请号：US12478388
申请日：2009-06-04
申请人： Clarence Filsfils , Jim Guichard , Eric C. Rosen , Eric W. Osborne
发明人： Clarence Filsfils , Jim Guichard , Eric C. Rosen , Eric W. Osborne
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/00 , H04L45/026 , H04L45/04
摘要： In one embodiment, a device of a particular non-backbone routing domain in a computer network determines whether each of one or more routes is reachable within the particular non-backbone domain. The device may then generate a filtered set of label mappings having only those of the one or more routes reachable within the particular non-backbone domain. Accordingly, the device may advertise label mappings only of the filtered set to one or more neighboring devices.
摘要翻译：在一个实施例中，计算机网络中的特定非骨干路由域的设备确定一个或多个路由中的每一个是否在特定非骨干域内可达。然后，设备可以生成仅具有在特定非骨干域内可达的一个或多个路由的那些过滤的标签映射集合。因此，设备可以将仅滤波集合的标签映射通告给一个或多个相邻设备。

118. 发明申请

US20100215047A1 SUBSETS OF THE FORWARD INFORMATION BASE (FIB) DISTRIBUTED AMONG LINE CARDS IN A SWITCHING DEVICE 有权
标题翻译：在切换设备中的线卡上分配的前向信息库（FIB）的附件
公开(公告)号：US20100215047A1
公开(公告)日：2010-08-26
申请号：US12390391
申请日：2009-02-20
申请人： Clarence Filsfils , Pradosh Mohapatra , Dheerendra Talur , John H. W. Bettink , Pranav Dharwadkar , David Delano Ward
发明人： Clarence Filsfils , Pradosh Mohapatra , Dheerendra Talur , John H. W. Bettink , Pranav Dharwadkar , David Delano Ward
IPC分类号： H04L12/56
CPC分类号： H04L45/00 , H04L45/38 , H04L45/54 , H04L49/3009
摘要： Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with subsets of the Forward Information Base (FIB) distributed among line cards in a switching device; especially wherein one or more of the line cards does not contain the complete FIB, and this line card forwards packets, for which it does not have the forwarding information, to another line card which has the forwarding information for the packet.
摘要翻译：公开了尤其涉及在交换设备中的线路卡之间分配的前向信息库（FIB）的子集的方法，装置，计算机存储介质，机制和装置; 特别是其中一个或多个线路卡不包含完整的FIB，并且该线路卡将不具有转发信息的分组转发到具有用于分组的转发信息的另一线路卡。

119. 发明申请

US20100150020A1 BACKUP ROUTE GENERATION IN BORDER GATEWAY PROTOCOL 有权
标题翻译： BORDER GATEWAY协议中的备份路由生成
公开(公告)号：US20100150020A1
公开(公告)日：2010-06-17
申请号：US12336469
申请日：2008-12-16
申请人： Eric C. Rosen , Clarence Filsfils , James Neil Guichard , Keyur P. Patel , Pradosh Kumar Mohapatra
发明人： Eric C. Rosen , Clarence Filsfils , James Neil Guichard , Keyur P. Patel , Pradosh Kumar Mohapatra
IPC分类号： H04L12/24
CPC分类号： H04L45/22 , H04L45/02 , H04L45/28
摘要： A method is provided for generating a backup route. Here, a route and a route distinguisher type associated with the route are received and a backup route is generated based on attributes of the route. A particular backup route distinguisher type that is associated with the route distinguisher type is assigned to the backup route. The backup route with the backup route distinguisher type are then advertised. Another method is provided that identifies the backup route. When the route and its route distinguisher type are received from the advertisement, an identification is made as to whether the route distinguisher type is assigned to a backup route. The route may then be designated as a backup route based on the identification.
摘要翻译：提供了一种用于生成备份路由的方法。这里，接收与路由相关联的路由和路由识别器类型，并且基于路由的属性生成备份路由。与路由识别器类型相关联的特定备份路由识别器类型被分配给备份路由。然后通告备份路由标识符类型的备份路由。提供了另一种标识备份路由的方法。当从广告接收到路由和路由识别器类型时，确定路由识别器类型是否被分配给备份路由。然后可以基于识别将路由指定为备用路由。

120. 发明授权

US07693047B2 System and method for PE-node protection 有权
标题翻译： PE节点保护的系统和方法
公开(公告)号：US07693047B2
公开(公告)日：2010-04-06
申请号：US11287801
申请日：2005-11-28
申请人： James Guichard , Jean-Philippe Vasseur , Clarence Filsfils , Peter De Vriendt
发明人： James Guichard , Jean-Philippe Vasseur , Clarence Filsfils , Peter De Vriendt
IPC分类号： G01R31/08 , H04L12/28
CPC分类号： H04L45/04 , H04L45/02 , H04L45/22 , H04L45/28 , H04L45/50 , H04L45/54
摘要： A novel fast reroute (FRR) technique is provided for quickly and efficiently rerouting selected types of network traffic in response to a node or link failure at the edge of a computer network. According to the technique, the network includes first and second edge devices that function as “FRR mates,” such that network traffic originally destined for one FRR mate may be quickly rerouted to the other without having to wait for conventional network convergence. When an edge device receives rerouted packets originally destined for its FRR mate, the device responds by forwarding only those rerouted packets matching the selected traffic types; rerouted packets that do not match the selected traffic types are dropped or otherwise discarded. The first and second edge devices may be statically configured as FRR mates, e.g., by a network administrator, or they may be configured to automatically detect their compatibility as FRR mates.
摘要翻译：提供了一种新颖的快速重路由（FRR）技术，用于响应于计算机网络边缘的节点或链路故障，快速有效地重新路由所选类型的网络流量。根据该技术，该网络包括用作“FRR配对”的第一和第二边缘设备，使得最初发往一个FRR配对的网络业务可能被快速重新路由到另一个，而不必等待传统的网络融合。当边缘设备接收到最初发往FRR配置的重新路由的报文时，设备只通过转发与所选流量类型匹配的那些重新路由的报文进行响应; 与所选流量类型不匹配的重路由数据包将被丢弃或以其他方式丢弃。第一和第二边缘设备可以被静态配置为FRR配对，例如由网络管理员，或者它们可以被配置为自动检测它们作为FRR配对的兼容性。

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