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1. 发明授权

US07496650B1 Identifying and suppressing transient routing updates 有权
标题翻译：识别和抑制瞬态路由更新
公开(公告)号：US07496650B1
公开(公告)日：2009-02-24
申请号：US10811626
申请日：2004-03-29
申请人： Stefano Benedetto Previdi , John Galen Scudder , Clarence Filsfils , David Delano Ward
发明人： Stefano Benedetto Previdi , John Galen Scudder , Clarence Filsfils , David Delano Ward
IPC分类号： G06F15/173 , G01R31/08 , H04L12/28
CPC分类号： H04L45/028 , H04L45/22 , H04L45/28 , H04L45/48 , H04L69/14 , H04L69/40
摘要： One or more sets of routing information are maintained. A network topology change indication of a progressive series of network changes is received, with at least one more associated network topology change indication of the progressive series of network changes expected to be received in the future. An updated set of routing information is computed based on the network topology change indication, and a determination is made as to whether or not the updated set of routing information changes nexthop information for one or more routes. In response to determining that the new set of routing information does not change nexthop information for said one or more routes and given the expectation of at least one more associated network topology change indication of the progressive series of network changes is expected to be received in the future, the routing information is not updated based on the updated set of routing information.
摘要翻译：维护一组或多组路由信息。接收到逐渐的一系列网络改变的网络拓扑变化指示，其中至少一个更多关联的网络拓扑改变预期在将来接收的渐进的一系列网络变化的指示。基于网络拓扑变化指示计算更新的路由信息集合，并且确定更新的路由信息集合是否改变一个或多个路由的下一跳信息。响应于确定新的路由信息集合不会改变用于所述一个或多个路由的下一跳信息，并且给出期望至少一个更相关联的网络拓扑结构的变化指示逐渐的一系列网络改变将在未来，路由信息不会根据更新的路由信息集进行更新。

2. 发明授权

US07860115B1 Withdrawing multiple advertised routes based on a single tag which may be of particular use in border gateway protocol 有权
标题翻译：根据可能在边界网关协议中特别使用的单个标签提取多个通告的路由
公开(公告)号：US07860115B1
公开(公告)日：2010-12-28
申请号：US10739238
申请日：2003-12-18
申请人： John Galen Scudder , David Delano Ward
发明人： John Galen Scudder , David Delano Ward
IPC分类号： H04L12/28 , G06F15/173
CPC分类号： H04L45/04 , H04L45/00 , H04L45/02 , H04L45/026 , H04L45/46
摘要： Disclosed are, inter alia, methods, apparatus, data structures, computer-readable medium, mechanisms, and means for withdrawing routes based on a tag. One implementation receives one or more messages identifying multiple routes and a tag associated with the multiple routes. A routing database is updated to include the routes. A particular message associated with a route withdraw operation is received, with the particular message including an indication of the tag. The multiple routes are removed from the routing database in response to receiving the tag. For example, the tag may be a Border Gateway Protocol attribute, a Border Gateway Protocol communities attribute, or some other indication. When some devices do not support this feature, before other nodes will typically send to a particular device a message to withdraw multiple routes based on a tag, the particular device must first advertise that it has this capability and/or it will withdraw multiple routes based on a tag.
摘要翻译：公开的方法，装置，数据结构，计算机可读介质，机构和用于基于标签撤回路线的装置。一个实现接收一个或多个标识多个路由的消息和与多个路由相关联的标签。更新路由数据库以包括路由。接收与路由提取操作相关联的特定消息，其中特定消息包括标签的指示。响应于接收到标签，多个路由从路由数据库中删除。例如，标签可以是边界网关协议属性，边界网关协议社区属性或其他一些指示。当某些设备不支持此功能时，在其他节点通常将特定设备发送基于标签撤销多个路由的消息之前，特定设备必须首先通告其具有此功能和/或将撤销多个路由在标签上。

3. 发明授权

US07499459B1 Partitioned routing information base 有权
标题翻译：分区路由信息库
公开(公告)号：US07499459B1
公开(公告)日：2009-03-03
申请号：US10772484
申请日：2004-02-05
申请人： John Galen Scudder , David Delano Ward , Paul A. Jensen
发明人： John Galen Scudder , David Delano Ward , Paul A. Jensen
IPC分类号： H04L12/56
CPC分类号： H04L45/60 , H04L45/02 , H04L45/52
摘要： A system and method for routing in a network according to a routing protocol. In a router having a plurality of route processors, a routing information base (RIB) is partitioned so that it executes as processes on two or more of the plurality of route processors. A first routing protocol process executing on one or more of the route processes determines a route to a destination in a given network and stores the route in a routing information base (RIB) associated with the first routing protocol process. The first routing protocol process updates a global routing information base (gRIB) with the new route. A gRIB process associated with the gRIB then writes the route from the gRIB to the routing information base (RIB) associated with the second routing protocol process.
摘要翻译：一种根据路由协议在网络中路由的系统和方法。在具有多个路由处理器的路由器中，分配路由信息库（RIB），使得其作为多个路由处理器中的两个或更多个处理器执行。在一个或多个路由进程上执行的第一路由协议进程确定到给定网络中的目的地的路由，并将路由存储在与第一路由协议进程相关联的路由信息库（RIB）中。第一个路由协议进程使用新路由更新全局路由信息库（gRIB）。与gRIB相关联的gRIB过程然后将路由从gRIB写入与第二路由协议进程相关联的路由信息库（RIB）。

4. 发明授权

US07286468B2 Routing system and method for synchronizing a routing system with peers after failover 有权
标题翻译：故障转移后路由系统与对等体同步的路由系统和方法
公开(公告)号：US07286468B2
公开(公告)日：2007-10-23
申请号：US10293162
申请日：2002-11-12
申请人： John Galen Scudder , David Delano Ward
发明人： John Galen Scudder , David Delano Ward
IPC分类号： G01R31/08
CPC分类号： H04L45/28 , G06F11/1471 , G06F11/1658 , H04L45/02 , H04L45/22 , H04L45/54 , H04L45/58
摘要： A routing system provides for transparent routing system failover by checkpointing route prefixes during normal operation by maintaining a route prefix table. After failure of a primary routing processor, routing with peer routing systems is synchronized through the use of this prefix table. The prefix table is managed by the primary routing processor and is accessible by a backup routing processor at least after failure of the primary routing processor. Upon the detection of a failure, a backup routing processor solicits routes from peer routing systems in response to the failure and generates a backup routing database from the routes received from peer routing systems. The backup routing processor also compares prefixes of routes in the backup routing database with prefixes in the prefix table, and sends route withdraw messages to the peer routing systems for routes having prefixes listed in the prefix table and not identified in the backup routing database.
摘要翻译：路由系统通过维护路由前缀表，在正常操作期间通过检查点路由前缀来提供透明路由系统故障切换。在主路由处理器发生故障之后，通过使用该前缀表来同步与对等路由系统的路由。前缀表由主路由处理器管理，并且至少在主路由处理器故障之后可由备份路由处理器访问。在检测到故障时，备份路由处理器响应于故障从对等路由系统请求路由，并从从对等路由系统接收的路由生成备份路由数据库。备份路由处理器还将备份路由数据库中的路由前缀与前缀表中的前缀进行比较，并将路由撤回消息发送到对等路由系统，以获取前缀表中列出的前缀并且未在备份路由数据库中标识的路由。

5. 发明申请

US20110069639A1 Withdrawing Multiple Advertised Routes Based On A Single Tag Which May Be Of Particular Use In Border Gateway Protocol 有权
标题翻译：基于可能在边界网关协议中特别使用的单个标签提取多个广播路由
公开(公告)号：US20110069639A1
公开(公告)日：2011-03-24
申请号：US12957050
申请日：2010-11-30
申请人： John Galen Scudder , David Delano Ward
发明人： John Galen Scudder , David Delano Ward
IPC分类号： H04L12/28
CPC分类号： H04L45/04 , H04L45/00 , H04L45/02 , H04L45/026 , H04L45/46
摘要： Advertised routes are associated with a particular tag in a routing database in a second router. A first router subsequently sends one or more messages associated with a route withdraw operation that specifies the particular tag, such that second router can identify, based on the particular tag, a set including multiple routes, and remove those multiple routes from its routing database. For example, the tag may be a Border Gateway Protocol attribute, a Border Gateway Protocol communities attribute, or some other indication, numeric quantity, or opaque value.
摘要翻译：广告路由与第二路由器中的路由数据库中的特定标签相关联。随后，第一路由器发送与指定特定标签的路由提取操作相关联的一个或多个消息，使得第二路由器可以基于特定标签识别包括多个路由的集合，并且从其路由数据库中去除那些多个路由。例如，标签可以是边界网关协议属性，边界网关协议社区属性或其他指示，数字数量或不透明值。

6. 发明申请

US20080304426A1 LOGICAL ROUTERS 有权
标题翻译：逻辑路由器
公开(公告)号：US20080304426A1
公开(公告)日：2008-12-11
申请号：US12192745
申请日：2008-08-15
申请人： David Delano Ward , George Suwala , Natarajan Shankar , John Galen Scudder , Andrew Lunstad
发明人： David Delano Ward , George Suwala , Natarajan Shankar , John Galen Scudder , Andrew Lunstad
IPC分类号： H04L12/28
CPC分类号： H04L45/00 , H04L41/0213 , H04L41/0233 , H04L45/586 , H04L49/70
摘要： Systems and methods include providing a router that may be deployed as multiple logical routers that share a common fast interconnect. These logical routers may functionally serve as core routers, peering routers, aggregation routers, etc. A further aspect of the system and methods is that the resources assigned to a logical router are allocated from a pool potentially including multitude of hardware cards. A further aspect of the system and methods is that a logical router may be independently managed by the owner of the router or by an owner of the logical router.
摘要翻译：系统和方法包括提供可以部署为共享公共快速互连的多个逻辑路由器的路由器。这些逻辑路由器可以在功能上用作核心路由器，对等路由器，聚合路由器等。系统和方法的另一方面是分配给逻辑路由器的资源从可能包括大量硬件卡的池中分配。系统和方法的另一方面是逻辑路由器可以由路由器的所有者或逻辑路由器的所有者独立地管理。

7. 发明授权

US08488470B2 Withdrawing multiple advertised routes based on a single tag which may be of particular use in border gateway protocol 有权
标题翻译：根据可能在边界网关协议中特别使用的单个标签提取多个通告的路由
公开(公告)号：US08488470B2
公开(公告)日：2013-07-16
申请号：US12957050
申请日：2010-11-30
申请人： John Galen Scudder , David Delano Ward
发明人： John Galen Scudder , David Delano Ward
IPC分类号： H04L12/26
CPC分类号： H04L45/04 , H04L45/00 , H04L45/02 , H04L45/026 , H04L45/46
摘要： Advertised routes are associated with a particular tag in a routing database in a second router. A first router subsequently sends one or more messages associated with a route withdraw operation that specifies the particular tag, such that second router can identify, based on the particular tag, a set including multiple routes, and remove those multiple routes from its routing database. For example, the tag may be a Border Gateway Protocol attribute, a Border Gateway Protocol communities attribute, or some other indication, numeric quantity, or opaque value.
摘要翻译：广告路由与第二路由器中的路由数据库中的特定标签相关联。随后，第一路由器发送与指定特定标签的路由提取操作相关联的一个或多个消息，使得第二路由器可以基于特定标签识别包括多个路由的集合，并且从其路由数据库中去除那些多个路由。例如，标签可以是边界网关协议属性，边界网关协议社区属性或其他指示，数字数量或不透明值。

8. 发明授权

US07415507B1 Logical routers 有权
标题翻译：逻辑路由器
公开(公告)号：US07415507B1
公开(公告)日：2008-08-19
申请号：US10772827
申请日：2004-02-05
申请人： David Delano Ward , George Suwala , Natarajan Shankar , John Galen Scudder , Andrew Lunstad
发明人： David Delano Ward , George Suwala , Natarajan Shankar , John Galen Scudder , Andrew Lunstad
IPC分类号： G06F15/173
CPC分类号： H04L45/00 , H04L41/0213 , H04L41/0233 , H04L45/586 , H04L49/70
摘要： Systems and methods include providing a router that may be deployed as multiple logical routers that share a common fast interconnect. These logical routers may functionally serve as core routers, peering routers, aggregation routers, etc. A further aspect of the system and methods is that the resources assigned to a logical router are allocated from a pool potentially including multitude of hardware cards. A further aspect of the system and methods is that a logical router may be independently managed by the owner of the router or by an owner of the logical router.
摘要翻译：系统和方法包括提供可以部署为共享公共快速互连的多个逻辑路由器的路由器。这些逻辑路由器可以在功能上用作核心路由器，对等路由器，聚合路由器等。系统和方法的另一方面是分配给逻辑路由器的资源从可能包括大量硬件卡的池中分配。系统和方法的另一方面是逻辑路由器可以由路由器的所有者或逻辑路由器的所有者独立地管理。

9. 发明授权

US07852772B2 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：US07852772B2
公开(公告)日：2010-12-14
申请号：US11254609
申请日：2005-10-20
申请人： Clarence Filsfils , Stewart Bryant , Ian Michael Charles Shand , David D. Ward , John Galen Scudder
发明人： Clarence Filsfils , Stewart Bryant , Ian Michael Charles Shand , David D. Ward , John Galen Scudder
IPC分类号： H04L12/26
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。

10. 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。

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