公开(公告)号：US09166807B2

公开(公告)日：2015-10-20

申请号：US12404786

申请日：2009-03-16

申请人： Rahul Aggarwal ,  Yakov Rekhter ,  Kireeti Kompella

发明人： Rahul Aggarwal ,  Yakov Rekhter ,  Kireeti Kompella

IPC分类号： H04L12/28 ,  H04L12/18 ,  H04L12/761 ,  H04L12/723 ,  H04Q11/00

CPC分类号： H04L12/1886 ,  H04L45/16 ,  H04L45/50

摘要： Principles of the invention relate to techniques for transmission of Layer 2 (L2) traffic over a point to multi-point (P2MP) label switched path (LSP) within a multi-protocol Label Switching (MPLS) network. A source or ingress network device may implement the techniques to connect multiple L2 interfaces to a P2MP LSP within an MPLS network via a P2MP Pseudo-Wire (PW) mechanism that emulates delivery of L2 data units over a packet switched network, such as the MPLS network. The ingress network device first establishes the P2MP LSP and then connects two or more L2 interfaces to the P2MP LSP via the P2MP PW mechanism. Egress network devices may also implement the techniques to terminate the P2MP LSP and de-multiplex traffic arriving via multiple P2MP PWs carried over the same P2MP LSP.

摘要翻译： 本发明的原理涉及用于在多协议标签交换（MPLS）网络内的点到多点（P2MP）标签交换路径（LSP）上传输第2层（L2）业务的技术。 源或入口网络设备可以实现通过P2MP伪线（PW）机制将多个L2接口连接到MPLS网络内的P2MP LSP的技术，所述P2MP伪线（PW）机制通过分组交换网络（诸如MPLS）模拟L2数据单元的传送 网络。 入口网络设备首先建立P2MP LSP，然后通过P2MP PW机制将两个或多个L2接口连接到P2MP LSP。 出口网络设备还可以实现终止P2MP LSP的技术，并对通过相同P2MP LSP承载的多个P2MP PW到达的流量进行解复用。

公开(公告)号：US20090175274A1

公开(公告)日：2009-07-09

申请号：US12404786

申请日：2009-03-16

申请人： Rahul Aggarwal ,  Yakov Rekhter ,  Kireeti Kompella

发明人： Rahul Aggarwal ,  Yakov Rekhter ,  Kireeti Kompella

IPC分类号： H04L12/56

CPC分类号： H04L12/1886 ,  H04L45/16 ,  H04L45/50

摘要： Principles of the invention relate to techniques for transmission of Layer 2 (L2) traffic over a point to multi-point (P2MP) label switched path (LSP) within a multi-protocol Label Switching (MPLS) network. A source or ingress network device may implement the techniques to connect multiple L2 interfaces to a P2MP LSP within an MPLS network via a P2MP Pseudo-Wire (PW) mechanism that emulates delivery of L2 data units over a packet switched network, such as the MPLS network. The ingress network device first establishes the P2MP LSP and then connects two or more L2 interfaces to the P2MP LSP via the P2MP PW mechanism. Egress network devices may also implement the techniques to terminate the P2MP LSP and de-multiplex traffic arriving via multiple P2MP PWs carried over the same P2MP LSP.

摘要翻译： 本发明的原理涉及用于在多协议标签交换（MPLS）网络内的点到多点（P2MP）标签交换路径（LSP）上传输第2层（L2）业务的技术。 源或入口网络设备可以实现通过P2MP伪线（PW）机制将多个L2接口连接到MPLS网络内的P2MP LSP的技术，所述P2MP伪线（PW）机制通过分组交换网络（诸如MPLS）模拟L2数据单元的传送 网络。 入口网络设备首先建立P2MP LSP，然后通过P2MP PW机制将两个或多个L2接口连接到P2MP LSP。 出口网络设备还可以实现终止P2MP LSP的技术，并对通过相同P2MP LSP承载的多个P2MP PW到达的流量进行解复用。

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。

公开(公告)号：US07570605B1

公开(公告)日：2009-08-04

申请号：US11212500

申请日：2005-08-26

申请人： Rahul Aggarwal ,  Yakov Rekhter ,  Anil Lohiya

发明人： Rahul Aggarwal ,  Yakov Rekhter ,  Anil Lohiya

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。

公开(公告)号：US07564806B1

公开(公告)日：2009-07-21

申请号：US11212509

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 ,  H04W4/00

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。

公开(公告)号：US07522600B1

公开(公告)日：2009-04-21

申请号：US11213636

申请日：2005-08-26

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。

公开(公告)号：US07522599B1

公开(公告)日：2009-04-21

申请号：US11212475

申请日：2005-08-26

申请人： Rahul Aggarwal ,  Yakov Rekhter ,  Anil Lohiya

发明人： Rahul Aggarwal ,  Yakov Rekhter ,  Anil Lohiya

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04L9/00

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。

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。

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。

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。