公开(公告)号：US08953500B1

公开(公告)日：2015-02-10

申请号：US13853966

申请日：2013-03-29

Applicant: Juniper Networks, Inc.

Inventor： Yimin Shen ,  Ina Minei ,  Raveendra Torvi

IPC: H04L12/28 ,  H04L12/761 ,  H04L1/00

CPC classification number: H04L45/16 ,  H04L45/46

Abstract: Techniques are described for establishing a point-to-multipoint (P2MP) label switched path (LSP) using a branch node-initiated signaling model in which branch node to leaf (B2L) sub-LSPs are signaled and utilized to form a P2MP LSP. The techniques described herein provides a scalable solution in which the number of sub-LSPs for which the source node or any given branch node need maintain state is equal to the number of physical data flows output from that node to downstream nodes, i.e., the number of output interfaces used for the P2MP LSP by that node to output data flows to downstream nodes. As such, unlike the conventional source node-initiated model in which each node maintains state for sub-LSPs that service each of the leaf nodes downstream from the device, the size and scalability of a P2MP LSP is no longer bound to the number of leaves that are downstream from that node.

Abstract translation: 描述了使用分支节点发起的信令模型来建立点对多点（P2MP）标签交换路径（LSP）的技术，其中分支节点到叶（B2L）子LSP被用信号通知并用于形成P2MP LSP。 本文描述的技术提供了可扩展解决方案，其中源节点或任何给定分支节点需要维护状态的子LSP的数量等于从该节点输出到下游节点的物理数据流的数量，即数量 由该节点用于P2MP LSP的输出接口输出到下游节点的数据流。 因此，与传统的源节点发起的模式不同，其中每个节点维护为设备下游的每个叶节点提供服务的子LSP的状态，P2MP LSP的大小和可扩展性不再限于叶数 这是该节点的下游。

公开(公告)号：US11777847B1

公开(公告)日：2023-10-03

申请号：US17100602

申请日：2020-11-20

Applicant: Juniper Networks, Inc.

Inventor： Yimin Shen ,  Zhaohui Zhang ,  Alexander Arseniev ,  Ronald Bonica

IPC: H04L45/00 ,  H04L45/16 ,  H04L69/22 ,  H04L45/50 ,  H04L101/659

CPC classification number: H04L45/566 ,  H04L45/16 ,  H04L45/50 ,  H04L69/22 ,  H04L2101/659

Abstract: A network node may receive a packet that originated from a root network node and may process the packet to determine segment identifier (SID) information associated with a point-to-multipoint transport chain. The network node may determine, based on the SID information, that the network node is a transit leaf node in the point-to-multipoint transport chain. The network node may generate, based on determining that the network node is a transit leaf node in the point-to-multipoint transport chain, a copy of the packet and may process the copy of the packet to perform one or more actions. The network node may update, based on determining that the network node is a transit leaf node in the point-to-multipoint transport chain, the SID information and may send, after updating the SID information, the packet, with the updated SID information, to another network node.

公开(公告)号：US09838306B2

公开(公告)日：2017-12-05

申请号：US14675338

申请日：2015-03-31

Applicant: Juniper Networks, Inc.

Inventor： Yimin Shen ,  Raveendra Torvi ,  Ross W. Callon

IPC: H04L12/00 ,  H04L12/723 ,  H04L12/707 ,  H04L12/703 ,  H04L12/913

CPC classification number: H04L45/50 ,  H04L45/22 ,  H04L45/24 ,  H04L45/28 ,  H04L47/724

Abstract: Techniques are described for establishing a second label switched path (LSP) instance of an LSP having a first LSP instance. In one example, for each downstream router designated for the second LSP instance of the LSP, the router determines whether the router is part of the first instance of the LSP and, if so, whether the first and second LSP instances for that downstream router share a common link to a nexthop router. If the first and second LSP instances share a common link to a nexthop router, the downstream router transmits a first message to the nexthop router, wherein the first message includes a suggested label. The downstream router receives, from the nexthop router, a second message, wherein the second message includes the suggested label. In another example, a label reuse indicator flag in a message from the ingress router causes routers on the second LSP instance to reuse the label of the first LSP instance when the same link is used to the upstream router for both LSP instances.

公开(公告)号：US20160261494A1

公开(公告)日：2016-09-08

申请号：US14682799

申请日：2015-04-09

Applicant: Juniper Networks, Inc.

Inventor： Minjie Dai ,  Yimin Shen ,  Raveendra Torvi ,  Markus Jork ,  Yakov Rekhter ,  Natrajan Venkataraman

IPC: H04L12/723

CPC classification number: H04L45/507 ,  H04L45/128 ,  H04L45/50

Abstract: Techniques are described for reusing downstream-assigned labels when establishing a new instance of a label switched path (LSP) prior to tearing down an existing instance of the LSP using make-before-break (MBB) procedures for RSVP. The techniques enable a routing engine of any non-ingress router along a path of the new LSP instance to reuse a previously allocated label for the existing LSP instance as the downstream assigned label for the new LSP instance when the paths of the existing LSP instance and the new LSP instance overlap. In this way, the non-ingress router does not need to update a label route in its forwarding plane for the reused label. When the new LSP instance completely overlaps the existing LSP instance, an ingress router of the LSP may avoid updating an ingress route in its forwarding plane for applications that use the LSP.

Abstract translation: 描述了在使用RSVP的使用前置中断（MBB）过程拆除LSP的现有实例之前，在建立标签交换路径（LSP）的新实例时，重用技术来重用下行分配的标签。 这些技术使得沿着新LSP实例的路径的任何非入口路由器的路由引擎可以使用现有LSP实例的先前分配的标签作为新LSP实例的下行分配标签，当现有LSP实例的路径和 新的LSP实例重叠。 以这种方式，非入口路由器不需要在其转发平面中更新重用标签的标签路由。 当新LSP实例与现有LSP实例完全重叠时，LSP的入口路由器可以避免在其转发平面中更新使用LSP的应用的入口路由。

公开(公告)号：US09253097B1

公开(公告)日：2016-02-02

申请号：US14042642

申请日：2013-09-30

Applicant: Juniper Networks, Inc.

Inventor： Dhiman Barman ,  Ina Minei ,  Minjie Dai ,  Yimin Shen ,  Raveendra Torvi ,  Nitin Bahadur

IPC: H04L12/24 ,  H04L12/803

CPC classification number: H04L47/122 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

Abstract: In one example, a method includes establishing a plurality of label switched paths (LSPs) having a common transit network device other than an ingress network device or an egress network device of any of the plurality of LSPs, and, by the transit network device along the plurality of LSPs, detecting a congestion condition on a link along the plurality of LSPs and coupled to the transit network device. The method also includes, responsive to detecting the congestion condition, and by the transit network device, selecting a subset of the plurality of LSPs to evict from the link, wherein the subset comprises less than all of the plurality of LSPs, and updating a forwarding plane of the transit network device to reroute network traffic received for the selected subset of the plurality of the LSPs for forwarding to a next hop on a bypass LSP that avoids the link.

Abstract translation: 在一个示例中，一种方法包括建立多个标签交换路径（LSP），其具有除了多个LSP中的任一个的入口网络设备或出口网络设备之外的公共中继网络设备，并且通过所述中转网络设备 所述多个LSP检测沿着所述多个LSP的链路上的拥塞状况并耦合到所述中转网络设备。 该方法还包括响应于检测到拥塞状况，以及由转接网络设备选择要从链路中逐出的多个LSP的子集，其中该子集包括小于所有多个LSP，并更新转发 转发网络设备的平面，重新路由接收到的多个LSP的所选子集的网络流量，以转发到避免链路的旁路LSP上的下一跳。