Connection verification for MPLS label switched paths and pseudowires
    41.
    发明授权
    Connection verification for MPLS label switched paths and pseudowires 有权
    MPLS标签交换路径和伪线的连接验证

    公开(公告)号:US08374095B2

    公开(公告)日:2013-02-12

    申请号:US12383360

    申请日:2009-03-23

    IPC分类号: H04J1/16

    摘要: In one embodiment, a connection verification (CV) message is initiated from an initiating maintenance end point (MEP) for an MPLS LSP, the CV message carried in a packet having a time-to-live (TTL) value of 1. Each maintenance intermediate point (MIP) along the MPLS LSP receives the packet and decrements the TTL, and in response to determining that the TTL equals 0, examines a payload of the packet to determine that the packet carries the CV message. The MIP may then append its MIP ID to a route record field of the payload having any previous MIP IDs of upstream MIPs, and forwards the CV message downstream along the MPLS LSP in a packet having a TTL value of 1. The end MEP receives the CV message, and sends a CV reply having the route record field with MIP IDs and an end MEP ID to the initiating MEP.

    摘要翻译: 在一个实施例中,从针对MPLS LSP的发起维护端点(MEP)发起连接验证(CV)消息,在具有生存时间(TTL)值为1的分组中携带的CV消息。每个维护 沿着MPLS LSP的中间点(MIP)接收分组并递减TTL,并且响应于确定TTL等于0,检查分组的有效载荷以确定分组携带CV消息。 然后,MIP可以将其MIP ID附加到具有上游MIP的任何先前MIP ID的有效载荷的路由记录字段,并且在TTL值为1的分组中沿着MPLS LSP向下游转发CV消息。终端MEP接收 CV消息,并将具有MIP ID和终结MEP ID的路由记录字段的CV回复发送到初始MEP。

    System and method for reporting out-of-resources (OOR) conditions in a data network
    42.
    发明申请
    System and method for reporting out-of-resources (OOR) conditions in a data network 有权
    在数据网络中报告资源不足(OOR)条件的系统和方法

    公开(公告)号:US20060092952A1

    公开(公告)日:2006-05-04

    申请号:US10964184

    申请日:2004-10-13

    IPC分类号: H04L12/56

    摘要: A system and method for advertising out-of-resources (OOR) conditions for entities, such as nodes, line cards and data links, in a manner that does not involve using a maximum cost to indicate the entity is “out-of-resources.” According to the technique, an OOR condition for an entity is advertised in one or more type-length-value (TLV) objects contained in an advertisement message. The advertisement message is flooded to nodes on a data network to inform them of the entity's OOR condition. Head-end nodes that process the advertisement message may use information contained in the TLV object to determine a path for a new label switched path (LSP) that does not include the entity associated with the OOR condition.

    摘要翻译: 用于以不涉及使用最大成本来指示实体的方式向诸如节点,线路卡和数据链路的实体(例如节点,线路卡和数据链路)广告外部资源(OOR)条件的系统和方法是“超出资源 “。 根据该技术,在广告消息中包含的一个或多个类型长度值(TLV)对象中通告实体的OOR条件。 广告消息被洪泛到数据网络上的节点,以通知他们实体的OOR条件。 处理广告消息的头端节点可以使用包含在TLV对象中的信息来确定不包括与OOR条件相关联的实体的新标签交换路径(LSP)的路径。