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公开(公告)号：US07292535B2
公开(公告)日：2007-11-06
申请号：US10153500
申请日：2002-05-23
IPC分类号： H04L1/00
CPC分类号： H04L45/28 , H04L45/02 , H04L45/586 , H04L45/60
摘要： In highly-available Open Shortest Path First (OSPF) routing in a network, the dynamic state of a backup OSPF instance in a router is synchronized with the dynamic state of an active OSPF instance using explicit message transmission from the active instance to the backup instance. After this, the dynamic state synchronization of the backup OSPF instance is maintained using a combination of explicit message updates from the active OSPF instance together with a message flow-through mechanism. In the event of fail-over of the active OSPF instance, then the router recovers seamlessly without reconfiguring or interrupting traffic among peer routers in the network, by functionally substituting the synchronized backup OSPF instance for the active OSPF instance, such that the backup OSPF instance establishes itself as the new active OSPF instance.
摘要翻译： 在网络中高度可用的开放最短路径优先（OSPF）路由中，路由器中的备份OSPF实例的动态状态与活动OSPF实例的动态状态同步，使用从活动实例到备份实例的显式消息传输 。 此后，使用来自活动OSPF实例的显式消息更新与消息流通机制的组合来维护备份OSPF实例的动态状态同步。 在活动OSPF实例故障切换的情况下，路由器在网络中的对等路由器之间无需重新配置或中断流量，通过功能替代活动OSPF实例的同步备份OSPF实例，可以无缝恢复，从而备份OSPF实例 建立自己作为新的活动OSPF实例。
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公开(公告)号：US07269133B2
公开(公告)日：2007-09-11
申请号：US10233704
申请日：2002-09-03
申请人： Xiaomei Lu , Ronald P. Folkes , Lance A. Visser
发明人： Xiaomei Lu , Ronald P. Folkes , Lance A. Visser
CPC分类号： H04L45/00 , H04L45/245 , H04L45/28 , H04L45/56 , H04L45/60
摘要： The HA IS-IS system provides a redundant backup IS-IS protocol instance that can seamlessly assume the function of the active IS-IS instance in the event of active MCP failure. Once the backup is online, the active synchronizes its global, interface, adjacency, neighbor, and LSP system state information. In the ongoing synchronization phase, the active and the backup maintain synchronization using a combination of explicit message updates from active to backup together with message flow-through. In the recovery phase, the operating system detects the failure of the active and notifies the backup, which assumes the active function as a standalone system without reconfiguring or interrupting traffic among peer network routers, and starts computing forwarding tables and updating routing tables.
摘要翻译： HA IS-IS系统提供冗余备份IS-IS协议实例，可以在发生主动MCP故障的情况下无缝地承担活动IS-IS实例的功能。 备份在线后，主动同步其全局，接口，邻接，邻居和LSP系统状态信息。 在正在进行的同步阶段，活动和备份使用从活动到备用的显式消息更新与消息流通的组合来保持同步。 在恢复阶段，操作系统检测到活动的故障，并通知备份，该备份将主动功能视为独立系统，而不会在对等网络路由器之间重新配置或中断流量，并启动计算转发表和更新路由表。
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3.发明授权Protocol communication and transit packet forwarding routed between multiple virtual routers within a single physical router 失效在单个物理路由器内的多个虚拟路由器之间路由协议通信和传输分组转发公开(公告)号：US07209976B2
公开(公告)日：2007-04-24
申请号：US10196393
申请日：2002-07-16
申请人： Ronald P. Folkes , Lance A. Visser
发明人： Ronald P. Folkes , Lance A. Visser
IPC分类号： G06F15/173
CPC分类号： H04L45/586 , H04L45/00 , H04L45/40 , H04L45/54 , H04L45/7457
摘要： Virtual routers within a single physical router share a centralized data plane containing a centralized switch fabric and a plurality of physical network interfaces, each assigned to only one virtual router. Using a logical cut-through device between a pair of virtual routers designated respectively client and server, packet forwarding information from the server is imported into the client, which creates, allocates, and maintains a data structure for the imported information, which then resides on the client interfaces. This imported forwarding information is then integrated into a single forwarding table that is used to recognize an incoming packet at the client and forward it appropriately out through a server interface with a single packet forwarding decision in a single transit through the switch fabric. Within a physical router, a client virtual router can communicate with multiple servers and can concurrently function as a server to multiple clients.
摘要翻译： 单个物理路由器中的虚拟路由器共享包含集中式交换结构和多个物理网络接口的集中式数据平面，每个物理网络接口仅分配给一个虚拟路由器。 在分配给客户端和服务器的一对虚拟路由器之间使用逻辑切换设备，来自服务器的数据包转发信息被导入到客户端，客户端创建，分配和维护导入信息的数据结构， 客户端接口。 然后，将此导入的转发信息集成到单个转发表中，该转发表用于在客户端识别传入的数据包，并通过交换结构在单个传输中通过单个数据包转发决定通过服务器接口正确转发。 在物理路由器中，客户端虚拟路由器可以与多个服务器进行通信，并可以同时作为多个客户端的服务器。
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公开(公告)号：US07499394B2
公开(公告)日：2009-03-03
申请号：US11819034
申请日：2007-06-25
申请人： Lance A. Visser , Qi Ning
发明人： Lance A. Visser , Qi Ning
IPC分类号： H04L12/56
摘要： High availability BGP4 is based on redundant hardware as well as redundant software that replicates the RUN state of BGP4. There are two copies, respectively active and backup, of BGP4 running on two separate redundant hardware platforms. All BGP4 internal implementations apply various methods to replicate the running state of BGP4 independently of peer network routers. When this hardware or software fails on one redundant hardware platform, peer routers are unaware of the failure. Internally, based on duplicative states, the local router recovers from the failure and keeps the protocol running. During the recovery period, the local router can bring up a backup again. In the HA architecture, these activities are not detected by peer routers, such that there is no instability to the Internet backbone caused by BGP4 failure.
摘要翻译： 高可用性BGP4基于冗余硬件以及复制BGP4运行状态的冗余软件。 在两个独立的冗余硬件平台上运行的BGP4分别有两个副本，分别为活动和备份。 所有BGP4内部实现都采用各种方法来独立于对等网络路由器复制BGP4的运行状态。 当这个硬件或软件在一个冗余硬件平台上发生故障时，对等路由器不知道该故障。 在内部，基于重复状态，本地路由器从故障中恢复并保持协议的运行。 在恢复期间，本地路由器可以再次启动备份。 在HA架构中，对等体路由器没有检测到这些活动，使BGP4故障引起的互联网骨干网不会发生不稳定。
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公开(公告)号：US20090129261A1
公开(公告)日：2009-05-21
申请号：US12260719
申请日：2008-10-29
申请人： Lance A. Visser , Qi Ning
发明人： Lance A. Visser , Qi Ning
IPC分类号： G06F11/00
摘要： High availability BGP4 is based on redundant hardware as well as redundant software that replicates the RUN state of BGP4. There are two copies, respectively active and backup, of BGP4 running on two separate redundant hardware platforms. All BGP4 internal implementations apply various methods to replicate the running state of BGP4 independently of peer network routers. When this hardware or software fails on one redundant hardware platform, peer routers are unaware of the failure. Internally, based on duplicative states, the local router recovers from the failure and keeps the protocol running. During the recovery period, the local router can bring up a backup again. In the HA architecture, these activities are not detected by peer routers, such that there is no instability to the Internet backbone caused by BGP4 failure.
摘要翻译： 高可用性BGP4基于冗余硬件以及复制BGP4运行状态的冗余软件。 在两个独立的冗余硬件平台上运行的BGP4分别有两个副本，分别为活动和备份。 所有BGP4内部实现都采用各种方法来独立于对等网络路由器复制BGP4的运行状态。 当这个硬件或软件在一个冗余硬件平台上发生故障时，对等路由器不知道该故障。 在内部，基于重复状态，本地路由器从故障中恢复并保持协议的运行。 在恢复期间，本地路由器可以再次启动备份。 在HA架构中，对等体路由器没有检测到这些活动，使BGP4故障引起的互联网骨干网不会发生不稳定。
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公开(公告)号：US07307979B2
公开(公告)日：2007-12-11
申请号：US10210414
申请日：2002-07-31
申请人： Lance A. Visser
发明人： Lance A. Visser
IPC分类号： H04L12/28 , G06F9/44 , G06F15/177 , G06F17/30
CPC分类号： H04L45/00 , H04L45/563 , Y10S707/99953 , Y10S707/99954
摘要： A router rolls back a current running configuration to a selected prior running configuration without requiring interruption or reinitialization of the router or of its network connections. The router retrieves command line interface control settings associated with the selected prior running configuration and those associated with the current running configuration. The router then generates and executes a rollback script based on the difference between the prior control settings and the current control settings.
摘要翻译： 路由器将当前运行的配置回滚到所选的先前运行的配置，而不需要中断或重新初始化路由器或其网络连接。 路由器检索与所选的以前运行的配置相关联的命令行界面控制设置以及与当前运行的配置相关联的命令行界面控制设置。 然后路由器基于现有控制设置和当前控制设置之间的差异生成并执行回滚脚本。
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公开(公告)号：US07236453B2
公开(公告)日：2007-06-26
申请号：US10185809
申请日：2002-06-27
申请人： Lance A. Visser , Qi Ning
发明人： Lance A. Visser , Qi Ning
IPC分类号： G01R31/08 , G06F15/173 , G06F11/00
摘要： High availability BGP4 is based on redundant hardware as well as redundant software that replicates the RUN state of BGP4. There are two copies, respectively active and backup, of BGP4 running on two separate redundant hardware platforms. All BGP4 internal implementations apply various methods to replicate the running state of BGP4 independently of peer network routers. When this hardware or software fails on one redundant hardware platform, peer routers are unaware of the failure. Internally, based on duplicative states, the local router recovers from the failure and keeps the protocol running. During the recovery period, the local router can bring up a backup again. In the HA architecture, these activities are not detected by peer routers, such that there is no instability to the Internet backbone caused by BGP4 failure.
摘要翻译： 高可用性BGP4基于冗余硬件以及复制BGP4运行状态的冗余软件。 在两个独立的冗余硬件平台上运行的BGP4分别有两个副本，分别为活动和备份。 所有BGP4内部实现都采用各种方法来独立于对等网络路由器复制BGP4的运行状态。 当这个硬件或软件在一个冗余硬件平台上发生故障时，对等路由器不知道该故障。 在内部，基于重复状态，本地路由器从故障中恢复并保持协议的运行。 在恢复期间，本地路由器可以再次启动备份。 在HA架构中，对等体路由器没有检测到这些活动，使BGP4故障引起的互联网骨干网不会发生不稳定。
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