公开(公告)号：US09253084B2

公开(公告)日：2016-02-02

申请号：US14188148

申请日：2014-02-24

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale

IPC: H04L12/723 ,  H04L12/705 ,  H04L12/707

CPC classification number: H04L45/507 ,  H04L45/18 ,  H04L45/22

Abstract: Label Distribution Protocol (LDP) extensions are described that enable distribution of neighbor-label mappings for directly connected neighbor routers. A router capable of supporting the LDP extensions distributes neighbor-labels to be used by the router to label switch traffic destined for the directly connected neighbor router irrespective of a hop-by-hop Interior Gateway Protocol (IGP) path determined based on link metrics. In some examples, the neighbor-labels may increase backup coverage, e.g., link protection and/or node protection, in a network that, due to link metrics, does not have a viable loop-free alternate (LFA) path between an ingress router and an egress router of a label switched path (LSP). In other examples, the neighbor-labels may improve load balancing by enabling an ingress router in a first autonomous system (AS) to select a particular remote link on which to send traffic destined for remote routers in a second AS.

Abstract translation: 描述了标签分发协议（LDP）扩展，其使得能够分发用于直接连接的邻居路由器的邻居标签映射。 能够支持LDP扩展的路由器分配路由器使用的邻居标签，用于标记直接连接的邻居路由器的交换机流量，而不管基于链路度量确定的逐跳内部网关协议（IGP）路径。 在一些示例中，邻居标签可以增加网络中的备份覆盖范围，例如链路保护和/或节点保护，由于链路指标，入口路由器之间不具有可行的无环路交替（LFA）路径 和标签交换路径（LSP）的出口路由器。 在其他示例中，相邻标签可以通过使第一自治系统（AS）中的入口路由器能够选择在其中发送去往第二AS中的远程路由器的流量的特定远程链路来改善负载平衡。

公开(公告)号：US09590845B1

公开(公告)日：2017-03-07

申请号：US14586829

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale ,  Raveendra Torvi ,  Yakov Rekhter

IPC: G01R31/08 ,  H04L12/24 ,  H04L12/723

CPC classification number: H04L41/0668 ,  H04L41/24 ,  H04L45/20 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L45/507

Abstract: Techniques are described for providing fast reroute inter-area node protection for label switched paths (LSPs) using label distribution protocol (LDP). In one example, a network device may be configured to determine that a protected node is an area border router, and use network topology information, obtained by an Interior Gateway Protocol (IGP) executing on the network device, to identify a second area border router in the same IGP area as the protected node, to which to automatically establish a bypass LSP and a targeted LDP session.

Abstract translation: 描述了使用标签分发协议（LDP）为标签交换路径（LSP）提供快速重路由区域间节点保护的技术。 在一个示例中，网络设备可以被配置为确定受保护节点是区域边界路由器，并且使用通过在网络设备上执行的内部网关协议（IGP）获得的网络拓扑信息来识别第二区域边界路由器 与受保护节点相同的IGP区域，自动建立旁路LSP和目标LDP会话。

公开(公告)号：US09590844B1

公开(公告)日：2017-03-07

申请号：US14586809

申请日：2014-12-30

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale ,  Raveendra Torvi ,  Yakov Rekhter

IPC: H04L12/28 ,  H04L12/24 ,  H04L12/751 ,  H04L12/723 ,  H04L12/733

CPC classification number: H04L41/0668 ,  H04L45/20 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L45/507

Abstract: Techniques are described for providing fast reroute intra-area node protection for label switched paths (LSPs) using label distribution protocol (LDP). In one example, a network device may be configured to use network topology information, obtained by an Interior Gateway Protocol (IGP) executing on the network device, to identify a next next hop merge point to which to automatically establish a bypass LSP, and to which to establish a targeted LDP session for obtaining a label advertised by the next next hop merge point.

Abstract translation: 描述了使用标签分发协议（LDP）为标签交换路径（LSP）提供快速重路由区域内节点保护的技术。 在一个示例中，网络设备可以被配置为使用由网络设备上执行的内部网关协议（IGP）获得的网络拓扑信息来识别自动建立旁路LSP的下一个下一跳合并点，并且 其建立目标LDP会话，以获得由下一个下一跳合并点通告的标签。

公开(公告)号：US10291522B1

公开(公告)日：2019-05-14

申请号：US15463106

申请日：2017-03-20

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale ,  Manish Gupta ,  Raveendra Torvi ,  Christopher Bowers

IPC: H04L12/741 ,  H04L29/08

Abstract: In general, the disclosure relates to techniques for initiating a targeted LDP session in a manner that includes information specifying one or more application for which a targeted LDP session is being initiated. In one example, a method includes receiving, by a network device, a LDP initialization message to initiate an Label Distribution Protocol (LDP) session with a peer network device, the LDP initialization message including a Targeted Applications Capability (TAC) field specifying one or more applications for which the LDP session is to be used for advertising forwarding equivalence class (FEC)-label bindings between the network device and the peer network device, and determining, by the network device, whether to allow the LDP session to be established based on the one or more applications specified in the TAC field.

公开(公告)号：US09602354B1

公开(公告)日：2017-03-21

申请号：US14320242

申请日：2014-06-30

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale ,  Manish Gupta ,  Raveendra Torvi ,  Christopher Bowers

IPC: H04L12/28 ,  H04L12/24 ,  H04L12/723

CPC classification number: H04L41/0893 ,  H04L45/507

Abstract: In general, the disclosure relates to techniques for initiating a targeted LDP session in a manner that includes information specifying one or more application for which a targeted LDP session is being initiated. In one example, a method includes receiving, by a network device, a LDP initialization message to initiate an Label Distribution Protocol (LDP) session with a peer network device, the LDP initialization message including a Targeted Applications Capability (TAC) field specifying one or more applications for which the LDP session is to be used for advertising forwarding equivalence class (FEC)-label bindings between the network device and the peer network device, and determining, by the network device, whether to allow the LDP session to be established based on the one or more applications specified in the TAC field.

公开(公告)号：US20150244615A1

公开(公告)日：2015-08-27

申请号：US14188148

申请日：2014-02-24

Applicant: Juniper Networks, Inc.

Inventor： Santosh Esale

IPC: H04L12/723

CPC classification number: H04L45/507 ,  H04L45/18 ,  H04L45/22

Abstract: Label Distribution Protocol (LDP) extensions are described that enable distribution of neighbor-label mappings for directly connected neighbor routers. A router capable of supporting the LDP extensions distributes neighbor-labels to be used by the router to label switch traffic destined for the directly connected neighbor router irrespective of a hop-by-hop Interior Gateway Protocol (IGP) path determined based on link metrics. In some examples, the neighbor-labels may increase backup coverage, e.g., link protection and/or node protection, in a network that, due to link metrics, does not have a viable loop-free alternate (LFA) path between an ingress router and an egress router of a label switched path (LSP). In other examples, the neighbor-labels may improve load balancing by enabling an ingress router in a first autonomous system (AS) to select a particular remote link on which to send traffic destined for remote routers in a second AS.

Abstract translation: 描述了标签分发协议（LDP）扩展，其使得能够分发用于直接连接的邻居路由器的邻居标签映射。 能够支持LDP扩展的路由器分配路由器使用的邻居标签，用于标记直接连接的邻居路由器的交换机流量，而不管基于链路度量确定的逐跳内部网关协议（IGP）路径。 在一些示例中，邻居标签可以增加网络中的备份覆盖范围，例如链路保护和/或节点保护，由于链路指标，入口路由器之间不具有可行的无环路交替（LFA）路径 和标签交换路径（LSP）的出口路由器。 在其他示例中，相邻标签可以通过使第一自治系统（AS）中的入口路由器能够选择在其中发送去往第二AS中的远程路由器的流量的特定远程链路来改善负载平衡。