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1. 发明授权

US08902730B2 Redundant pseudowires for border gateway patrol-based virtual private local area network service multi-homing environments 有权
标题翻译：用于边界网关巡检的虚拟专用局域网服务多归属环境的冗余伪线
公开(公告)号：US08902730B2
公开(公告)日：2014-12-02
申请号：US13354136
申请日：2012-01-19
申请人： Bhupesh Kothari , Rahul Aggarwal
发明人： Bhupesh Kothari , Rahul Aggarwal
IPC分类号： G01R31/08 , H04L12/721 , H04L12/761 , H04L12/703 , H04L12/701 , H04L12/46 , H04L12/723 , H04L12/709 , H04L12/707 , H04L12/741 , H04L12/24 , H04L12/715
CPC分类号： H04L41/0663 , H04L12/4633 , H04L45/00 , H04L45/04 , H04L45/16 , H04L45/22 , H04L45/245 , H04L45/28 , H04L45/507 , H04L45/54 , H04L45/66 , H04L45/68
摘要： A method performed by a provider edge device includes generating pseudo-wire tables based on virtual private local area network service advertisements from other provider edge devices, where the provider edge device services customer edge devices, and establishing pseudo-wires with respect to the other provider edge devices, based on the pseudo-wire tables, where the pseudo-wires include an active pseudo-wire and at least one standby pseudo-wire with respect to each of the other provider edge devices. The method also includes generating and advertising VPLS advertisement to the other provider edge devices, detecting a communication link failure associated with one of the customer edge devices in which the provider edge device services, and determining whether the at least one standby pseudo-wire needs to be utilized because of the communication link failure.
摘要翻译：由提供商边缘设备执行的方法包括：基于来自其他提供商边缘设备的虚拟专用局域网服务广告生成伪线表，其中提供商边缘设备服务于客户边缘设备，以及针对另一个提供商建立伪线基于伪线表，其中伪线包括相对于其他提供商边缘设备中的每一个的活动伪线和至少一个备用伪线。该方法还包括向其他提供商边缘设备生成和广告VPLS广告，检测与提供者边缘设备服务的其中一个客户边缘设备相关联的通信链路故障，以及确定至少一个备用伪线需要由于通信链路故障而被利用。

2. 发明授权

US08804736B1 Network tunneling using a label stack delimiter 有权
标题翻译：使用标签栈分隔符进行网络隧道
公开(公告)号：US08804736B1
公开(公告)日：2014-08-12
申请号：US13243450
申请日：2011-09-23
申请人： John E. Drake , Rahul Aggarwal , Nitin Bahadur , Nischal Sheth
发明人： John E. Drake , Rahul Aggarwal , Nitin Bahadur , Nischal Sheth
IPC分类号： H04L12/28
CPC分类号： H04L12/4633 , H04L12/462 , H04L12/465
摘要： An ingress router of a provider network receives a packet from a customer network, determines that the packet includes a customer network label and that the packet is to be tunneled through the provider network, based on the determination, adds a delimiter label to the packet indicative of a bottom of a provider network label stack and one or more provider network labels to the packet, and forwards the packet to a next routing device along the provider network tunnel. An egress routing device of the provider network receives a packet comprising a provider network label stack, removes the provider network label stack from the packet, determines whether the packet comprises a delimiter label following the provider network label stack, and, when the packet comprises the delimiter label, forwards the packet to a customer network interface device.
摘要翻译：供应商网络的入口路由器从客户网络接收分组，基于该确定，确定分组包括客户网络标签并且分组将被穿过提供商网络，将分隔符标签添加到分组指示提供商网络标签堆叠的底部和一个或多个提供商网络标签，并且将分组沿着提供商网络隧道转发到下一个路由设备。提供商网络的出口路由设备接收包括提供商网络标签堆栈的分组，从分组中移除提供商网络标签栈，确定分组是否包括在提供商网络标签栈之后的分隔符标签，并且当分组包括分隔符标签，将数据包转发到客户网络接口设备。

3. 发明授权

US08339973B1 Multicast traceroute over MPLS/BGP IP multicast VPN 有权
标题翻译： MPLS / BGP组播VPN组播跟踪路由
公开(公告)号：US08339973B1
公开(公告)日：2012-12-25
申请号：US12876871
申请日：2010-09-07
申请人： Swaminathan Pichumani , Rahul Aggarwal
发明人： Swaminathan Pichumani , Rahul Aggarwal
IPC分类号： H04L12/26
CPC分类号： H04L43/10 , H04L12/1863 , H04L12/4641
摘要： The subject matter of this specification can be implemented in, among other things, a method that includes receiving, at a first network device that is associated with an MVPN, an mtrace message that identifies a source device that is associated with the MVPN and that is separated from the first network device by an MPLS network. The method further includes determining an LSP from the first network device to a second network device that is associated with the MVPN and that is separated from the first network device by the MPLS network. The method further includes adding an IP header to the mtrace message, the IP header including a destination address set to a localhost loopback IP address. The method further includes encapsulating the mtrace message with an MPLS label stack that causes the encapsulated mtrace message to reach an instance of the MVPN on the second network device.
摘要翻译：本说明书的主题可以包括在与MVPN关联的第一网络设备处接收识别与MVPN相关联的源设备的mtrace消息的方法，并且是通过MPLS网络与第一个网络设备分离。该方法还包括确定从第一网络设备到与MVPN相关联并且由MPLS网络与第一网络设备分离的第二网络设备的LSP。该方法还包括向mtrace消息添加IP报头，该IP报头包括设置为本地主机回送IP地址的目的地址。该方法还包括使用MPLS标签堆叠来封装mtrace消息，使得封装的mtrace消息到达第二网络设备上的MVPN的实例。

4. 发明授权

US08170026B2 Method and apparatus for virtual circuit routes 有权
标题翻译：虚拟电路路由的方法和装置
公开(公告)号：US08170026B2
公开(公告)日：2012-05-01
申请号：US12368003
申请日：2009-02-09
申请人： Rahul Aggarwal , Ajay M. Patel
发明人： Rahul Aggarwal , Ajay M. Patel
IPC分类号： H04L12/28 , H04J3/16
CPC分类号： H04L49/602 , H04L45/7457 , H04L49/3009
摘要： A method and apparatus for virtual circuit routes is described. A method in a network element comprises associating a virtual circuit to a layer 3 next hop, the virtual circuit being associated with a layer 2 protocol specific logical circuit, receiving a packet on the logical circuit, processing the packet with configuration information indicated by the virtual circuit, and forwarding the packet to the layer 3 next hop associated with the virtual circuit without processing the packet's layer 3 header.
摘要翻译：描述了虚拟电路路由的方法和装置。网络元件中的一种方法包括将虚拟电路与第3层下一跳相关联，虚拟电路与第2层协议专用逻辑电路相关联，在逻辑电路上接收分组，用由虚拟并且将分组转发到与虚拟电路相关联的第3层下一跳，而不处理分组的第3层报头。

5. 发明授权

US08068492B1 Transport of control and data traffic for multicast virtual private networks 有权
标题翻译：组播虚拟专用网络的控制和数据流量传输
公开(公告)号：US08068492B1
公开(公告)日：2011-11-29
申请号：US12427542
申请日：2009-04-21
申请人： Rahul Aggarwal , Yakov Rekhter , Anil Lohiya
发明人： Rahul Aggarwal , Yakov Rekhter , Anil Lohiya
IPC分类号： G06F15/16
CPC分类号： H04L12/4641 , H04L12/18 , H04L12/1886
摘要： Principles of the invention are described for providing multicast virtual private networks (MVPNs) across a public network that are capable of carrying high-bandwidth multicast traffic with increased scalability. In particular, the MVPNs may transport layer three (L3) multicast traffic, such as Internet Protocol (IP) packets, between remote sites via the public network. The principles described herein may reduce the overhead of protocol independent multicast (PIM) neighbor adjacencies and customer control information maintained for MVPNs. The principles may also reduce the state and the overhead of maintaining the state in the network by removing the need to maintain at least one dedicated multicast tree per each MVPN.
摘要翻译：描述了本发明的原理，用于提供跨越公共网络的多播虚拟专用网络（MVPN），所述组播虚拟专用网络能够承载具有增加的可扩展性的高带宽组播流量。特别地，MVPN可以经由公共网络在远程站点之间传输第三层（L3）组播流量，例如因特网协议（IP）分组。本文所描述的原理可以减少维护MVPN的协议无关组播（PIM）邻居邻居和客户控制信息的开销。这些原理还可以通过消除维护每个MVPN至少一个专用多播树的需要来减少维护网络状态的状态和开销。

6. 发明授权

US07933267B1 Shared multicast trees for multicast virtual private networks 有权
标题翻译：用于组播虚拟专用网络的共享组播树
公开(公告)号：US07933267B1
公开(公告)日：2011-04-26
申请号：US11213638
申请日：2005-08-26
申请人： Rahul Aggarwal , Yakov Rekhter
发明人： Rahul Aggarwal , Yakov Rekhter
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L12/4641 , H04L12/18 , H04L12/1886
摘要： Principles of the invention are described for providing multicast virtual private networks (MVPNs) across a public network that are capable of carrying high-bandwidth multicast traffic with increased scalability. In particular, the MVPNs may transport layer three (L3) multicast traffic, such as Internet Protocol (IP) packets, between remote sites via the public network. The principles described herein may reduce the overhead of protocol independent multicast (PIM) neighbor adjacencies and customer control information maintained for MVPNs. The principles may also reduce the state and the overhead of maintaining the state in the network by removing the need to maintain at least one dedicated multicast tree per each MVPN.
摘要翻译：描述了本发明的原理，用于提供跨越公共网络的多播虚拟专用网络（MVPN），所述组播虚拟专用网络能够承载具有增加的可扩展性的高带宽组播流量。特别地，MVPN可以经由公共网络在远程站点之间传输第三层（L3）组播流量，例如因特网协议（IP）分组。本文所描述的原理可以减少维护MVPN的协议无关组播（PIM）邻居邻居和客户控制信息的开销。这些原理还可以通过消除维护每个MVPN至少一个专用多播树的需要来减少维护网络状态的状态和开销。

7. 发明授权

US07787380B1 Resource reservation protocol with traffic engineering point to multi-point label switched path hierarchy 有权
标题翻译：具有流量工程的资源预留协议指向多点标签交换路径层次
公开(公告)号：US07787380B1
公开(公告)日：2010-08-31
申请号：US11508096
申请日：2006-08-22
申请人： Rahul Aggarwal , Yakov Rekhter
发明人： Rahul Aggarwal , Yakov Rekhter
IPC分类号： G01R31/08 , G06F11/00 , G08C15/00 , H04J1/16 , H04J3/14 , H04L1/00 , H04L12/26
CPC分类号： H04L45/16 , H04L41/12 , H04L45/10 , H04L45/507 , H04L2001/0093
摘要： The invention is directed toward techniques for Multi-Protocol Label Switching (MPLS) upstream label assignment for the Resource Reservation Protocol with Traffic Engineering (RSVP-TE). The techniques include extensions to the RSVP-TE that enable distribution of upstream assigned labels in Path messages from an upstream router to two or more downstream routers of tunnel established over a network. The tunnel may comprise a RSVP-TE P2MP Label Switched Path (LSP) or an Internet Protocol (IP) multicast tunnel. The techniques also include extensions to the RSVP-TE that enable a router to advertise upstream label assignment capability to neighboring routers in the network. The MPLS upstream label assignment using RSVP-TE described herein enables a branch router to avoid traffic replication on a Local Area Network (LAN) for RSVP-TE P2MP LSPs.
摘要翻译：本发明涉及用于具有流量工程（RSVP-TE）的资源预留协议的多协议标签交换（MPLS）上游标签分配技术。这些技术包括对RSVP-TE的扩展，使得能够在从上游路由器到网络中建立的隧道的两个或更多个下游路由器的路径消息中分配上游分配的标签。隧道可以包括RSVP-TE P2MP标签交换路径（LSP）或因特网协议（IP）组播隧道。这些技术还包括RSVP-TE的扩展，使得路由器能够向网络中的相邻路由器通告上游标签分配能力。使用本文描述的RSVP-TE的MPLS上行标签分配能够使分支路由器避免在局域网（LAN）上进行RSVP-TE P2MP LSP的业务复制。

8. 发明申请

US20090141724A1 METHOD AND APPARATUS FOR VITUAL CIRCUIT ROUTES 有权
标题翻译：用于虚拟电路的方法和装置
公开(公告)号：US20090141724A1
公开(公告)日：2009-06-04
申请号：US12368003
申请日：2009-02-09
申请人： Rahul Aggarwal , Ajay M. Patel
发明人： Rahul Aggarwal , Ajay M. Patel
IPC分类号： H04L12/28
CPC分类号： H04L49/602 , H04L45/7457 , H04L49/3009
摘要： A method and apparatus for virtual circuit routes is described. A method in a network element comprises associating a virtual circuit to a layer 3 next hop, the virtual circuit being associated with a layer 2 protocol specific logical circuit, receiving a packet on the logical circuit, processing the packet with configuration information indicated by the virtual circuit, and forwarding the packet to the layer 3 next hop associated with the virtual circuit without processing the packet's layer 3 header.
摘要翻译：描述了虚拟电路路由的方法和装置。网络元件中的一种方法包括将虚拟电路与第3层下一跳相关联，虚拟电路与第2层协议专用逻辑电路相关联，在逻辑电路上接收分组，用由虚拟并且将分组转发到与虚拟电路相关联的第3层下一跳，而不处理分组的第3层报头。

9. 发明授权

US08953590B1 Layer two virtual private network having control plane address learning supporting multi-homed customer networks 有权
标题翻译：具有支持多归属客户网络的控制平面地址学习的第二层虚拟专用网络
公开(公告)号：US08953590B1
公开(公告)日：2015-02-10
申请号：US13427698
申请日：2012-03-22
申请人： Rahul Aggarwal , Ravi Shekhar
发明人： Rahul Aggarwal , Ravi Shekhar
IPC分类号： H04L12/46
CPC分类号： H04L12/4675 , H04L12/1886 , H04L45/50 , H04L45/66 , H04L45/74 , H04L47/32
摘要： This disclosure describes techniques for supporting an and Multi-Protocol Label Switching (MPLS)-based Virutal Private Network (VPN) service that provides layer two (L2) connectivity between the customer edge device. In particular, the techniques support a Border Gateway (BGP) MPLS-based MAC VPNs (“MAC-VPN” or “MAC VPN”). The techniques provide a MAC VPN in which L2 MAC address learning occurs in the control plane via inter-device BGP signaling in the control plane rather than the data plane, in response to VPN traffic, as may be typical with other VPN technologies.
摘要翻译：本公开描述了用于支持基于多协议标签交换（MPLS）的维特鲁特私人网络（VPN）服务的技术，其在客户边缘设备之间提供第二层（L2）连接。特别地，这些技术支持基于边界网关（BGP）的基于MPLS的MAC VPN（“MAC-VPN”或“MAC VPN”）。这些技术提供了MAC VPN，其中通过控制平面中的设备间BGP信令而不是数据平面，在控制平面中响应于VPN流量而发生L2 MAC地址学习，如其他VPN技术的典型代表。

10. 发明授权

US08953446B1 Load balancing multicast join requests over interior and exterior BGP paths in a MVPN 有权
标题翻译：通过MVPN中的内部和外部BGP路径负载平衡组播加入请求
公开(公告)号：US08953446B1
公开(公告)日：2015-02-10
申请号：US13332214
申请日：2011-12-20
申请人： Lili Wang , Rahul Aggarwal , Yakov Rekhter
发明人： Lili Wang , Rahul Aggarwal , Yakov Rekhter
IPC分类号： H04J3/14 , H04L12/28 , H04J3/26 , G06F15/16 , G06F15/173
CPC分类号： H04L12/4641
摘要： A network device receives a join request on a downstream interface, wherein the join request specifies a source device and multicast group, wherein the network device is positioned within a core network of a multicast virtual private network (MVPN) that transmits multicast traffic between the source device and a plurality of receivers associated with customer sites. The network device selects an upstream router to which to send the join request from among a plurality of upstream routers on paths leading to the source device, so as to avoid creating a join request loop in the core network. At least one of the upstream routers is positioned on an Exterior Border Gateway Protocol (EBGP) path toward the source device, and at least one of the upstream routers is positioned on an Interior BGP (IBGP) path toward the source device. The network device sends the join request to the selected upstream device.
摘要翻译：网络设备在下游接口上接收加入请求，其中所述连接请求指定源设备和多播组，其中所述网络设备位于组播虚拟专用网（MVPN）的核心网内，所述多播虚拟专用网（MVPN）在所述源设备和与客户站点相关联的多个接收器。网络设备从通往源设备的路径上从多个上游路由器中选择向其发送加入请求的上游路由器，以避免在核心网络中建立加入请求循环。至少一个上游路由器位于朝向源设备的外部边界网关协议（EBGP）路径上，并且至少一个上游路由器位于朝向源设备的内部BGP（IBGP）路径上。网络设备向所选择的上游设备发送加入请求。

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