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1. 发明申请

US20160241463A1 METHOD AND APPARATUS FOR FAST REROUTE, CONTROL PLANE AND FORWARDING PLANE SYNCHRONIZATION 有权
标题翻译：快速REROUTE，控制平面和前向平面同步的方法和装置
公开(公告)号：US20160241463A1
公开(公告)日：2016-08-18
申请号：US14624454
申请日：2015-02-17
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Pramodh D'Souza , Lars Ernstrom , Antoni Przygienda
IPC分类号： H04L12/703 , H04L12/755 , H04L12/707
CPC分类号： H04L45/28 , H04L45/021 , H04L45/22
摘要： Exemplary methods include generating a first fast reroute (FRR) next hop (NH) comprising of a first primary next hop (PNH), a first secondary next hop (SNH), and a first attribute, wherein the first PNH and first SNH include forwarding information that causes traffic to be forwarded towards a second and third network device, respectively. The methods include sending a first request to a forwarding plane to generate a second FRR NH comprising of a second PNH, a second SNH, and a second attribute. The methods include updating contents of the first FRR NH, and sending a second request to the forwarding plane to update the second FRR NH, wherein the second request causes the forwarding plane to determine whether to revert back to using the second PNH based on whether the first attribute included in the second request is different from the second attribute of the second FRR NH.
摘要翻译：示例性方法包括生成包括第一主要下一跳（PNH），第一次级下一跳（SNH）和第一属性的第一快速重新路由（FRR）下一跳（NH），其中第一PNH和第一SNH包括转发分别将流量转发到第二和第三网络设备的信息。所述方法包括向转发平面发送第一请求以生成包括第二PNH，第二SNH和第二属性的第二FRR NH。所述方法包括更新第一FRR NH的内容，以及向转发平面发送第二请求以更新第二FRR NH，其中第二请求导致转发平面基于是否还原到转发平面来确定是否还原回使用第二PNH 包括在第二请求中的第一属性不同于第二FRR NH的第二属性。

2. 发明申请

US20150103671A1 High Performance LFA Path Algorithms 有权
标题翻译：高性能LFA路径算法
公开(公告)号：US20150103671A1
公开(公告)日：2015-04-16
申请号：US14052414
申请日：2013-10-11
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Lars Ernström , Alfred C. Lindem, III , Pramodh D'Souza , Evgeny Tantsura
IPC分类号： H04L12/705 , H04L12/703 , H04L12/733
CPC分类号： H04L45/18 , H04L41/0659 , H04L45/122 , H04L45/28
摘要： A method is implemented by a network element to improve efficiency of loop free alternative (LFA) path computation by caching data from a shortest path first calculation for use in the LFA path calculation. The shortest path first calculation determines a shortest path from a source vertex to each vertex in a network topology graph representing the network in which the network element operates, where an endpoint for each shortest path is the shortest path vertex, and where each shortest path determined by the shortest path first calculation is stored.
摘要翻译：网络元件实现一种方法，通过从LFA路径计算中使用的最短路径优先计算缓存数据来提高无循环替代（LFA）路径计算的效率。最短路径第一计算确定在表示网元运行的网络的网络拓扑图中从源顶点到每个顶点的最短路径，其中每个最短路径的端点是最短路径顶点，并且其中每个最短路径被确定通过最短路径先计算存储。

3. 发明申请

US20160218968A1 METHOD AND APPARATUS FOR OPTIMAL, SCALE INDEPENDENT FAILOVER REDUNDANCY INFRASTRUCTURE 有权
标题翻译：方法和设备优化，规模独立的冗余基础设施
公开(公告)号：US20160218968A1
公开(公告)日：2016-07-28
申请号：US14618132
申请日：2015-02-10
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Pramodh D'Souza , Antoni Przygienda , Zoltan Toth , Lars Ernstrom
IPC分类号： H04L12/703 , H04L29/08 , H04L12/707 , H04L29/06
CPC分类号： H04L45/28 , H04L41/0659 , H04L41/0668 , H04L45/22 , H04L45/245 , H04L67/28 , H04L69/22
摘要： Exemplary methods performed by a first network device (ND) include generating first and second prefix entries associating incoming Internet Protocol (IP) traffic to first and second data structures (DSs), respectively. Generating the first DS includes generating a first proxy including forwarding information causing incoming IP traffic to be forwarded to a second ND, and generating a second proxy referencing a third DS. Generating the second DS includes generating a first proxy including forwarding information causing incoming IP traffic to be forwarded to the second ND, and generating a second proxy referencing the third DS. The methods include generating the third DS including forwarding information causing the incoming IP traffic to be forwarded to a third ND, the third DS further including first state information indicating whether the forwarding information included in the first proxies of the first and second DSs should be used for forwarding the incoming IP traffic.
摘要翻译：由第一网络设备（ND）执行的示例性方法包括分别产生将传入的因特网协议（IP）流量与第一和第二数据结构（DS）相关联的第一和第二前缀条目。生成第一DS包括生成包括转发信息的第一代理，所述转发信息导致进入的IP业务被转发到第二ND，以及生成参考第三DS的第二代理。生成第二DS包括生成包括转发信息的第一代理，所述转发信息导致传入的IP流量被转发到第二ND，以及生成参考第三DS的第二代理。所述方法包括生成包括转发信息的第三DS，所述转发信息导致所述进入的IP业务被转发到第三ND，所述第三DS还包括指示是否应当使用包括在所述第一和第二DS的所述第一代理中的转发信息的第一状态信息用于转发传入的IP流量。

4. 发明申请

US20160182362A1 INTER-DOMAIN FAST REROUTE METHODS AND NETWORK DEVICES 有权
标题翻译：域内快速REROUTE方法和网络设备
公开(公告)号：US20160182362A1
公开(公告)日：2016-06-23
申请号：US15055405
申请日：2016-02-26
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Lars Ernstrom , Pramodh D'Souza , Zoltan Toth
IPC分类号： H04L12/707 , H04L12/715 , H04L12/24 , H04L12/931
CPC分类号： H04L45/22 , H04L41/0668 , H04L45/04 , H04L45/28 , H04L45/50 , H04L49/65
摘要： A network device, is to be deployed in a network between a first network domain and a second network domain, and is to be configured for fast reroute. The network device includes a first traffic forwarder control module, corresponding to the first network domain, which is to determine a primary next hop in the first network domain. The control plane includes a second traffic forwarder control module, corresponding to the second network domain, which is to determine a backup next hop in the second network domain. The backup next hop is to be used as a fast reroute for the primary next hop in response to a failure associated with the primary next hop. The control plane includes a controller module, in communication with the first and second traffic forwarder control modules, which is to configure a forwarding structure of the forwarding plane with the primary and backup next hops.
摘要翻译：网络设备将部署在第一网络域和第二网络域之间的网络中，并被配置为快速重新路由。网络设备包括与第一网络域相对应的第一业务转发器控制模块，其用于确定第一网络域中的主要下一跳。控制平面包括对应于第二网络域的第二业务转发器控制模块，其用于确定第二网络域中的备份下一跳。备份下一跳将被用作主下一跳的快速重路由，以响应与主要下一跳相关联的故障。控制平面包括与第一和第二流量转发器控制模块通信的控制器模块，其用于配置转发平面与主要和备用下一跳的转发结构。

5. 发明申请

US20140334286A1 INTER-DOMAIN FAST REROUTE METHODS AND NETWORK DEVICES 有权
标题翻译：域内快速REROUTE方法和网络设备
公开(公告)号：US20140334286A1
公开(公告)日：2014-11-13
申请号：US13891969
申请日：2013-05-10
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Lars Ernström , Pramodh D'Souza , Zoltán Tóth
IPC分类号： H04L12/24
CPC分类号： H04L45/22 , H04L41/0668 , H04L45/04 , H04L45/28 , H04L45/50 , H04L49/65
摘要： A network device, is to be deployed in a network between a first network domain and a second network domain, and is to be configured for fast reroute. The network device includes a first traffic forwarder control module, corresponding to the first network domain, which is to determine a primary next hop in the first network domain. The control plane includes a second traffic forwarder control module, corresponding to the second network domain, which is to determine a backup next hop in the second network domain. The backup next hop is to be used as a fast reroute for the primary next hop in response to a failure associated with the primary next hop. The control plane includes a controller module, in communication with the first and second traffic forwarder control modules, which is to configure a forwarding structure of the forwarding plane with the primary and backup next hops.
摘要翻译：网络设备将部署在第一网络域和第二网络域之间的网络中，并被配置为快速重新路由。网络设备包括与第一网络域相对应的第一业务转发器控制模块，其用于确定第一网络域中的主要下一跳。控制平面包括对应于第二网络域的第二业务转发器控制模块，其用于确定第二网络域中的备份下一跳。备份下一跳将被用作主下一跳的快速重路由，以响应与主要下一跳相关联的故障。控制平面包括与第一和第二流量转发器控制模块通信的控制器模块，其用于配置转发平面与主要和备用下一跳的转发结构。

6. 发明授权

US09954769B2 Inter-domain fast reroute methods and network devices 有权
公开(公告)号：US09954769B2
公开(公告)日：2018-04-24
申请号：US15055405
申请日：2016-02-26
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Lars Ernstrom , Pramodh D'Souza , Zoltan Toth
IPC分类号： H04J1/16 , H04L12/707 , H04L12/24 , H04L12/715 , H04L12/703 , H04L12/723 , H04L12/931
CPC分类号： H04L45/22 , H04L41/0668 , H04L45/04 , H04L45/28 , H04L45/50 , H04L49/65
摘要： A network device, is to be deployed in a network between a first network domain and a second network domain, and is to be configured for fast reroute. The network device includes a first traffic forwarder control module, corresponding to the first network domain, which is to determine a primary next hop in the first network domain. The control plane includes a second traffic forwarder control module, corresponding to the second network domain, which is to determine a backup next hop in the second network domain. The backup next hop is to be used as a fast reroute for the primary next hop in response to a failure associated with the primary next hop. The control plane includes a controller module, in communication with the first and second traffic forwarder control modules, which is to configure a forwarding structure of the forwarding plane with the primary and backup next hops.

7. 发明授权

US09787577B2 Method and apparatus for optimal, scale independent failover redundancy infrastructure 有权
公开(公告)号：US09787577B2
公开(公告)日：2017-10-10
申请号：US14618132
申请日：2015-02-10
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Pramodh D'Souza , Antoni Przygienda , Zoltan Toth , Lars Ernstrom
IPC分类号： H04L12/703 , H04L29/06 , H04L29/08 , H04L12/707 , H04L12/709 , H04L12/24
CPC分类号： H04L45/28 , H04L41/0659 , H04L41/0668 , H04L45/22 , H04L45/245 , H04L67/28 , H04L69/22
摘要： Exemplary methods performed by a first network device (ND) include generating first and second prefix entries associating incoming Internet Protocol (IP) traffic to first and second data structures (DSs), respectively. Generating the first DS includes generating a first proxy including forwarding information causing incoming IP traffic to be forwarded to a second ND, and generating a second proxy referencing a third DS. Generating the second DS includes generating a first proxy including forwarding information causing incoming IP traffic to be forwarded to the second ND, and generating a second proxy referencing the third DS. The methods include generating the third DS including forwarding information causing the incoming IP traffic to be forwarded to a third ND, the third DS further including first state information indicating whether the forwarding information included in the first proxies of the first and second DSs should be used for forwarding the incoming IP traffic.

8. 发明授权

US09774524B2 Method and apparatus for fast reroute, control plane and forwarding plane synchronization 有权
公开(公告)号：US09774524B2
公开(公告)日：2017-09-26
申请号：US14624454
申请日：2015-02-17
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Pramodh D'Souza , Lars Ernstrom , Antoni Przygienda
IPC分类号： H04L12/703 , H04L12/755 , H04L12/707
CPC分类号： H04L45/28 , H04L45/021 , H04L45/22
摘要： Exemplary methods include generating a first fast reroute (FRR) next hop (NH) comprising of a first primary next hop (PNH), a first secondary next hop (SNH), and a first attribute, wherein the first PNH and first SNH include forwarding information that causes traffic to be forwarded towards a second and third network device, respectively. The methods include sending a first request to a forwarding plane to generate a second FRR NH comprising of a second PNH, a second SNH, and a second attribute. The methods include updating contents of the first FRR NH, and sending a second request to the forwarding plane to update the second FRR NH, wherein the second request causes the forwarding plane to determine whether to revert back to using the second PNH based on whether the first attribute included in the second request is different from the second attribute of the second FRR NH.

9. 发明授权

US09306800B2 Inter-domain fast reroute methods and network devices 有权
标题翻译：域间快速重路由方法和网络设备
公开(公告)号：US09306800B2
公开(公告)日：2016-04-05
申请号：US13891969
申请日：2013-05-10
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Lars Ernström , Pramodh D'Souza , Zoltán Tóth
IPC分类号： G01R31/08 , H04L12/24 , H04L12/715 , H04L12/703 , H04L12/723
CPC分类号： H04L45/22 , H04L41/0668 , H04L45/04 , H04L45/28 , H04L45/50 , H04L49/65
摘要： A network device, is to be deployed in a network between a first network domain and a second network domain, and is to be configured for fast reroute. The network device includes a first traffic forwarder control module, corresponding to the first network domain, which is to determine a primary next hop in the first network domain. The control plane includes a second traffic forwarder control module, corresponding to the second network domain, which is to determine a backup next hop in the second network domain. The backup next hop is to be used as a fast reroute for the primary next hop in response to a failure associated with the primary next hop. The control plane includes a controller module, in communication with the first and second traffic forwarder control modules, which is to configure a forwarding structure of the forwarding plane with the primary and backup next hops.
摘要翻译：网络设备将部署在第一网络域和第二网络域之间的网络中，并被配置为快速重新路由。网络设备包括与第一网络域相对应的第一业务转发器控制模块，其用于确定第一网络域中的主要下一跳。控制平面包括对应于第二网络域的第二业务转发器控制模块，其用于确定第二网络域中的备份下一跳。备份下一跳将被用作主下一跳的快速重路由，以响应与主要下一跳相关联的故障。控制平面包括与第一和第二流量转发器控制模块通信的控制器模块，其用于配置转发平面与主要和备用下一跳的转发结构。

10. 发明授权

US09577874B2 Method and apparatus for IP/MPLS fast reroute 有权
标题翻译：用于IP / MPLS快速重路由的方法和装置
公开(公告)号：US09577874B2
公开(公告)日：2017-02-21
申请号：US13902583
申请日：2013-05-24
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Pramodh D'Souza , Lars Ernström , Reda Haddad , Evgeny Tantsura , Jakob Heitz
IPC分类号： H04L12/24 , H04L12/703 , H04L12/707 , H04L12/723 , H04L12/715
CPC分类号： H04L41/0668 , H04L45/22 , H04L45/28 , H04L45/50 , H04L45/64
摘要： A method is disclosed that is implemented by a router for executing an internet protocol fast reroute process in response to a network event invalidating a current route to a destination node without degrading forwarding plane functionality or performance caused by indirect forwarding information base lookups. The method comprises a set steps including receiving or generating the network event by the router, the network event associated with a network event identifier and looking up the network event identifier in an event table to determine routes that are affected by the network event. The method further includes determining whether a route with a fast reroute forwarding object is affected by the network event in the routing information base and overwriting a current next hop forwarding object using a backup next hop forwarding object in the forwarding information base.
摘要翻译：公开了一种由路由器实现的方法，用于响应于网络事件使目前路由到达目的节点无效，而不会降低由间接转发信息库查找引起的转发平面功能或性能，执行因特网协议快速重路由进程。该方法包括一组设置步骤，包括路由器接收或生成网络事件，与网络事件标识符相关联的网络事件，并在事件表中查找网络事件标识符，以确定受网络事件影响的路由。该方法还包括确定具有快速重路由转发对象的路由是否受路由信息库中的网络事件的影响，并使用转发信息库中的备份下一跳转发对象来覆盖当前的下一跳转发对象。

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