公开(公告)号：US20150334667A1

公开(公告)日：2015-11-19

申请号：US14808469

申请日：2015-07-24

Applicant: Cisco Technology, Inc.

Inventor： Bin Mo ,  David Ojemann ,  George Swallow

IPC: H04W56/00 ,  H04L12/723

CPC classification number: H04W56/002 ,  H04L45/02 ,  H04L45/507

Abstract: A technique may improve LDP-IGP synchronization in a MPLS network when an interface of a router coupled to a communications link along a shortest path between a source router and a destination router becomes newly active. Specifically, an IGP adjacency may be held down over the newly active link while a LDP adjacency is established over the link. The router may inject a temporary, non-redistributable route having a large administrative weight into its routing table utilizing addresses learned during establishment of the LDP adjacency. The injected route ensures that there is a reachable route to a peer router so that LDP may converge. After LDP has converged and all needed label bindings have been distributed in the MPLS network utilizing the injected route, IGP executing on the router may advertise a normal cost metric for the link associated with the newly active interface, and IGP convergence may be completed.

Abstract translation: 当沿着源路由器和目的地路由器之间的最短路径的通信链路的路由器的接口变为新活动时，技术可以改善MPLS网络中的LDP-IGP同步。 具体地说，可以通过链路建立LDP邻接关系，在新活动链路上保持IGP邻接关系。 路由器可以利用在建立LDP邻接过程中学习到的地址，向其路由表中注入具有较大管理权限的临时的，不可重新分发的路由。 注入的路由确保存在到对等路由器的可达路由，以便LDP可以收敛。 LDP已经融合，所有需要的标签绑定都使用注入的路由分布在MPLS网络中，路由器上执行的IGP可以为与新活动接口相关联的链路通告正常的成本指标，并且可以完成IGP收敛。

公开(公告)号：US09160567B2

公开(公告)日：2015-10-13

申请号：US13116801

申请日：2011-05-26

Applicant: Hao Long

Inventor： Hao Long

IPC: H04L12/28 ,  H04L12/46 ,  H04L12/723 ,  H04L12/725 ,  H04L12/913

CPC classification number: H04L12/4633 ,  H04L12/4641 ,  H04L45/302 ,  H04L45/507 ,  H04L47/724

Abstract: A method for establishing a Virtual Local Area Network (VLAN) connection is provided, which includes: receiving a first signaling message, in which the first signaling message includes an unused VLAN ID and explicit routing information; registering the VLAN ID by using the at least one unused VLAN ID; and sending the first signaling message according to the explicit routing information. Several node apparatuses and several systems are also provided in the present invention. Therefore, automatic VLAN configuration is performed in an environment without a spanning tree protocol, and traffic engineering is supported simultaneously.

Abstract translation: 提供一种用于建立虚拟局域网（VLAN）连接的方法，包括：接收第一信令消息，其中第一信令消息包括未使用的VLAN ID和显式路由信息; 通过使用至少一个未使用的VLAN ID注册VLAN ID; 并根据显式路由信息发送第一信令消息。 在本发明中还提供了几个节点装置和几个系统。 因此，在没有生成树协议的环境中执行自动VLAN配置，同时支持流量工程。

公开(公告)号：US09124484B2

公开(公告)日：2015-09-01

申请号：US13349302

申请日：2012-01-12

Applicant: Bin Mo ,  David Ojemann ,  George Swallow

Inventor： Bin Mo ,  David Ojemann ,  George Swallow

IPC: H04L12/28 ,  H04J3/06 ,  H04L12/751 ,  H04L12/723

CPC classification number: H04W56/002 ,  H04L45/02 ,  H04L45/507

Abstract: A technique may improve LDP-IGP synchronization in a MPLS network when an interface of a router coupled to a communications link along a shortest path between a source router and a destination router becomes newly active. Specifically, an IGP adjacency may be held down over the newly active link while a LDP adjacency is established over the link. The router may inject a temporary, non-redistributable route having a large administrative weight into its routing table utilizing addresses learned during establishment of the LDP adjacency. The injected route ensures that there is a reachable route to a peer router so that LDP may converge. After LDP has converged and all needed label bindings have been distributed in the MPLS network utilizing the injected route, IGP executing on the router may advertise a normal cost metric for the link associated with the newly active interface, and IGP convergence may be completed.

Abstract translation: 当沿着源路由器和目的地路由器之间的最短路径的通信链路的路由器的接口变为新活动时，技术可以改善MPLS网络中的LDP-IGP同步。 具体地说，可以通过链路建立LDP邻接关系，在新活动链路上保持IGP邻接关系。 路由器可以利用在建立LDP邻接过程中学习到的地址，向其路由表中注入具有较大管理权限的临时的，不可重新分发的路由。 注入的路由确保存在到对等路由器的可达路由，以便LDP可以收敛。 LDP已经融合，所有需要的标签绑定都使用注入的路由分布在MPLS网络中，路由器上执行的IGP可以为与新活动接口相关联的链路通告正常的成本指标，并且可以完成IGP收敛。

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。

公开(公告)号：US20150215198A1

公开(公告)日：2015-07-30

申请号：US14164113

申请日：2014-01-24

Applicant: Cisco Technologies, Inc.

Inventor： Ijsbrand WIJNANDS ,  Greg Shepherd ,  Christian MARTIN ,  Rajiv ASATI

IPC: H04L12/709 ,  H04L12/721 ,  H04L12/723

CPC classification number: H04L45/245 ,  H04L45/507 ,  H04L45/566 ,  Y02D50/30

Abstract: Techniques are disclosed for aggregating label-switched paths (LPSs). One method for aggregating LSPs may include a first node comparing forwarding equivalence classes (FECs) associated with respective label-switched paths (LSPs). The first node identifies FECs that differ by a given number of bits, such as one or two bits based on the comparison. The first node generates an aggregate FEC that masks out the differing bits, thereby reducing the number of LSPs. The first node transmits the aggregate FEC to an ingress node.

Abstract translation: 公开了用于聚合标签交换路径（LPS）的技术。 用于聚合LSP的一种方法可以包括比较与相应标签交换路径（LSP）相关联的转发等价类（FEC）的第一节点。 第一节点识别出差分给定​​位数的FEC，例如基于比较的一位或两位。 第一个节点生成一个聚合FEC，用于掩蔽不同的比特，从而减少了LSP的数量。 第一节点将聚合FEC发送到入节点。

公开(公告)号：US20150207675A1

公开(公告)日：2015-07-23

申请号：US14424431

申请日：2013-08-27

Applicant: NEC CORPORATION

Inventor： Takeo Hayashi

IPC: H04L12/24 ,  H04L12/723 ,  H04L12/741 ,  H04L12/703

CPC classification number: H04L41/0668 ,  H04L45/28 ,  H04L45/38 ,  H04L45/50 ,  H04L45/507 ,  H04L45/74

Abstract: A path control system, includes: a forwarding network in which each forwarding node belongs to a group and forwards a packet based on a sub-label corresponding to the group; an edge node that adds a label including a plurality of sub-labels based on information contained in a received packet; and a control apparatus that performs path control of the forwarding network by controlling a combination of sub-labels added by the edge node and by controlling forwarding processing performed based on the sub-labels by the forwarding node(s). When a failure has occurred in a communication path, the control apparatus causes the edge node to change a sub-label corresponding to a failure section of the communication path in which a failure has occurred out of sub-labels added to a packet received after the failure, and causes the forwarding node(s) to forward a packet along a path that does not go through the failure section.

Abstract translation: 路径控制系统包括：转发网络，其中每个转发节点属于一个组，并且基于与该组对应的子标签转发分组; 边缘节点，其基于包含在接收到的分组中的信息添加包括多个子标签的标签; 以及控制装置，其通过控制由边缘节点添加的子标签的组合并且通过控制由转发节点基于子标签执行的转发处理来执行转发网络的路径控制。 当在通信路径中发生故障时，控制装置使边缘节点改变对应于已经发生故障的通信路径的故障部分的子标签，该子标签被添加到在 并导致转发节点沿着不通过故障部分的路径转发数据包。

公开(公告)号：US09049098B2

公开(公告)日：2015-06-02

申请号：US12850841

申请日：2010-08-05

Applicant: Jim Guichard ,  David Delano Ward ,  Cedell Adam Alexander, Jr. ,  Carlos M. Pignataro

Inventor： Jim Guichard ,  David Delano Ward ,  Cedell Adam Alexander, Jr. ,  Carlos M. Pignataro

IPC: H04L12/751 ,  H04L12/723 ,  H04L12/725 ,  H04L12/46

CPC classification number: H04L45/02 ,  H04L12/4633 ,  H04L45/306 ,  H04L45/507

Abstract: An application node advertises service(s), using a routing protocol, that it offers to other network nodes. For example, the routing protocol used to advertise service(s) in a Service Provider Network is typically an link-state, Interior Gateway Protocol (IGP), such as, but not limited to, Intermediate System to Intermediate System (IS-IS) or Open Shortest Path First (OSPF). Packets are encapsulated and sent from a service node (e.g., packet switching device) using one or more advertised services applied to a packet by an application node (e.g., a packet switching device and/or computing platform such as a Cisco ASR 1000).

Abstract translation: 应用程序节点使用其提供给其他网络节点的路由协议来通告服务。 例如，用于在服务提供商网络中通告服务的路由协议通常是链路状态内部网关协议（IGP），例如但不限于中间系统到中间系统（IS-IS） 或开放最短路径优先（OSPF）。 使用由应用节点（例如，分组交换设备和/或诸如Cisco ASR 1000的计算平台）应用于分组的一个或多个通告的服务，将分组封装并从服务节点（例如，分组交换设备）发送。

公开(公告)号：US20150131675A1

公开(公告)日：2015-05-14

申请号：US14076952

申请日：2013-11-11

Applicant: Futurewei Technologies, Inc.

Inventor： Huaimo Chen ,  Renwei Li

IPC: H04L12/26 ,  H04L12/723

CPC classification number: H04L45/507 ,  H04L45/50 ,  H04L47/125 ,  H04L47/781 ,  H04L47/822

Abstract: In a central controller, a method for managing resources comprising sending a request to a node in a domain controlled by the central controller, wherein the request requests at least a portion of a resource of the node, receiving a response from the node, wherein the response contains information on the availability of the portion of the resource, and storing the information on the availability of the portion of the resource for use in establishing a multiprotocol label switching (MPLS) label switched path (LSP).

Abstract translation: 在中央控制器中，用于管理资源的方法包括向由所述中央控制器控制的域中的节点发送请求，其中所述请求请求所述节点的资源的至少一部分，从所述节点接收响应，其中， 响应包含关于资源部分的可用性的信息，并且存储关于用于建立多协议标签交换（MPLS）标签交换路径（LSP）的部分资源的可用性的信息。

公开(公告)号：US20150131653A1

公开(公告)日：2015-05-14

申请号：US14080177

申请日：2013-11-14

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Arthur L. Zaifman ,  John M. Mocenigo ,  Donald Barry Mellen

IPC: H04L29/06 ,  H04L12/723 ,  H04L12/46

CPC classification number: H04L45/507 ,  H04L63/306

Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media, such as storage devices and/or storage disks) to implement label stack identification for lawful interception of virtual private network traffic are disclosed. Example methods disclosed herein can include detecting a trigger that is to cause synchronization of label stack data associated with first virtual private network traffic to be intercepted, the label stack data used to route the first virtual private network traffic in a network. Such example methods can also include, in response to detecting the trigger, initiating execution of a first command on a first router in the network to determine a first label used to route the first virtual private network traffic in the network. Such example methods can further include determining a current label stack for the first virtual private network traffic based on the first label.

Abstract translation: 公开了实现用于合法拦截虚拟专用网络业务的标签栈标识的方法，装置，系统和制品（例如物理存储介质，诸如存储设备和/或存储盘）。 本文公开的示例性方法可以包括检测将导致与要拦截的第一虚拟专用网络业务相关联的标签堆栈数据的同步的触发，所述标签堆栈数据用于将网络中的第一虚拟专用网络业务路由。 这种示例性方法还可以包括响应于检测到触发器，在网络中的第一路由器上开始执行第一命令，以确定用于路由网络中的第一虚拟专用网络业务的第一标签。 这样的示例方法还可以包括基于第一标签来确定第一虚拟专用网业务的当前标签堆栈。

公开(公告)号：US08995304B2

公开(公告)日：2015-03-31

申请号：US13711265

申请日：2012-12-11

Applicant: Futurewei Technologies, Inc.

Inventor： Qianglin Quintin Zhao ,  Katherine Zhao ,  Tao Zhou ,  Ying Chen

IPC: H04L12/723 ,  H04L12/761

CPC classification number: H04L45/507 ,  H04L45/16

Abstract: A computer program product comprising computer executable instructions stored on a non-transitory medium of an upstream node in a network system comprising a plurality of nodes that when executed by a processor cause the node to advertise an upstream assigned label to a downstream node, receive a message from the downstream node, and if the received message confirms that no conflict with the upstream assigned label exists at the downstream node, assign the upstream-assigned label, or if the received message confirms that a conflict with the upstream-assigned label exists at the downstream node, either select a new upstream-assigned label or wait until indication is received that the label resource has become available.

Abstract translation: 一种计算机程序产品，其包括存储在网络系统中的上游节点的非暂时介质上的计算机可执行指令，所述计算机可执行指令包括多个节点，当由处理器执行时，所述多个节点使所述节点向下游节点通告上游分配的标签， 消息，并且如果接收到的消息确认在下游节点不存在与上游分配标签的冲突，则分配上行分配的标签，或者如果接收到的消息确认与上游分配标签的冲突存在于 下游节点选择新的上游分配标签，或者等待直到收到标签资源已经可用的指示。