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    LABEL-SWITCHED PACKETS WITH DEVICE-INDEPENDENT LABELS
    72.
    发明公开
    LABEL-SWITCHED PACKETS WITH DEVICE-INDEPENDENT LABELS 审中-公开
    标签 - 开关 - 麻醉麻醉品VORRICHTUNGSUNABHÄNGIGENETIKETTEN

    公开(公告)号：EP3016326A1

    公开(公告)日：2016-05-04

    申请号：EP15189215.5

    申请日：2015-10-09

    Applicant: Cisco Technology, Inc.

    Inventor： CAI, Dezhong ,  FILSFILS, Clarence ,  SPRAGGS, Simon James Trevor

    IPC: H04L12/715 ,  H04L12/723

    CPC classification number: H04L45/50 ,  H04L45/04

    Abstract: In one embodiment, a device-independent label is associated with multiple network devices such that the packet switching devices in a network will forward a packet based on the device-independent label to one of these multiple network devices. In one embodiment, these device-independent labels include, but are not limited to, domain-identifying labels and forwarding-punt labels. In one embodiment, a domain-identifying label is defined as a label that identifies a plurality of network nodes without identifying a single particular network node, single particular interface, nor single particular link. In one embodiment, a first-domain forwarding-punt label is placed at the top of the label stack to identify to forward the label-switched packet to any one of a plurality of designated forwarding nodes corresponding to the first-domain forwarding-punt label (e.g., for sending to a packet switching device which will have forwarding information for the second domain-identifying label.).

    Abstract translation: 在一个实施例中，与设备无关的标签与多个网络设备相关联，使得网络中的分组交换设备将基于与设备无关的标签转发到这些多个网络设备之一的分组。 在一个实施例中，这些与设备无关的标签包括但不限于域标识标签和转发平头标签。 在一个实施例中，域识别标签被定义为标识多个网络节点而不识别单个特定网络节点，单个特定接口，或单个特定链路的标签。 在一个实施例中，第一域转发平头标签被放置在标签堆叠的顶部，以标识将标签交换分组转发到对应于第一域转发平头标签的多个指定转发节点中的任何一个 （例如，用于发送到将具有用于第二域标识标签的转发信息的分组交换设备）。

    DISTRIBUTED CONNECTIVITY VERIFICATION PROTOCOL REDUNDANCY
    73.
    发明公开
    DISTRIBUTED CONNECTIVITY VERIFICATION PROTOCOL REDUNDANCY 有权
    分布式连通性验证协议冗余

    公开(公告)号：EP2604001A1

    公开(公告)日：2013-06-19

    申请号：EP11749271.0

    申请日：2011-07-25

    Applicant: Cisco Technology, Inc.

    Inventor： BOUTROS, Sami ,  MASSE, Sylvain ,  FILSFILS, Clarence

    IPC: H04L12/26 ,  H04L12/56

    CPC classification number: H04L43/0811 ,  H04L41/0663 ,  H04L45/245 ,  H04L45/68 ,  H04L69/16 ,  Y02D50/30

    Abstract: In one embodiment, a connectivity verification protocol (CVP) session for a particular virtual interface (VI) may operate on a particular group of two or more line cards (LCs) on a network device. The group of LCs may then transmit CVP session packets, at a reduced rate that is sufficient to maintain the CVP session based on a negotiated CVP full rate, onto the particular VI through ingress path processing on the network device. Ingress path processing, in particular, takes transmitted CVP session packets and egresses them onto an appropriate LC of the network device currently responsible for the VI egress. Also, in response to receiving CVP session packets for the VI on an LC of the network device currently responsible for the VI ingress, the receiving LC may forward the received CVP session packets to the particular corresponding group of LCs, which may then process the received CVP session packets.

    Abstract translation: 在一个实施例中，用于特定虚拟接口（VI）的连接验证协议（CVP）会话可以在网络设备上的两个或更多个线卡（LC）的特定组上操作。 然后，该组LC可以通过网络设备上的入口路径处理，以足够维持基于协商的CVP全速率的CVP会话的降低的速率，将CVP会话分组发送到特定的VI上。 特别地，入口路径处理需要传送的CVP会话包并将其传送到当前负责VI出口的网络设备的适当LC上。 而且，响应于在当前负责VI入口的网络设备的LC上接收到用于VI的CVP会话分组，接收LC可以将接收到的CVP会话分组转发给特定对应LC组，其然后可以处理接收到的 CVP会话包。

    METHOD AND APPARATUS FOR GENERATING ROUTING INFORMATION IN A DATA COMMUNICATIONS NETWORK
    75.
    发明授权
    METHOD AND APPARATUS FOR GENERATING ROUTING INFORMATION IN A DATA COMMUNICATIONS NETWORK 有权
    方法和设备的数据通信电网发电机ROUTING INFORMATION

    公开(公告)号：EP1673901B1

    公开(公告)日：2012-08-08

    申请号：EP04795045.6

    申请日：2004-10-13

    Applicant: Cisco Technology, Inc.

    Inventor： BRYANT, Stewart Frederick ,  SHAND, Ian Michael Charles ,  PREVIDI, Stefano Benedetto ,  FILSFILS, Clarence

    IPC: H04L12/26 ,  H04L12/56

    CPC classification number: H04L45/123 ,  H04L45/02 ,  H04L45/023

    Abstract: A method and apparatus are disclosed for generating routing information in a data communications network. A first network element (such as a router) receives information relating to a second network element, such as another node or a network link. In response, the first network element determines whether the information relating to the second network element indicates a change in the network. When information relating to a second network element indicates a change in the network, the first network element determines a new shortest path through the network from the first network element for each network element in the network. After a delay, the first network element updates routing information for the first network element based on the new shortest path for the first network element. Preferably the delay is proportional to the distance of the first network element from the second network element.

    LOOP PREVENTION TECHNIQUE FOR MPLS USING SERVICE LABELS
    76.
    发明授权
    LOOP PREVENTION TECHNIQUE FOR MPLS USING SERVICE LABELS 有权
    用于预防磨削使用服务的MPLS标签

    公开(公告)号：EP1859586B1

    公开(公告)日：2012-04-11

    申请号：EP06734608.0

    申请日：2006-02-09

    Applicant: Cisco Technology, Inc.

    Inventor： FILSFILS, Clarence ,  WARD, David, D. ,  PREVIDI, Stefano, B. ,  VASSEUR, Jean, Phillippe ,  GUICHARD, Jim ,  RASZUK, Robert

    IPC: H04L12/56

    CPC classification number: H04L45/18 ,  H04L45/04 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

    Abstract: A local fast reroute (FRR) technique is implemented at the edge of a computer network. In accordance with the technique, if an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes a least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The rerouted packets are designated as being 'protected' data packets before they are forwarded to the backup edge device. The backup edge device identifies protected data packets as those which contain a predetermined 'service' label in their MPLS label stacks. In other words, the service label is used as an identifier for packets that have been FRR rerouted. Upon receiving a data packet containing a service label, the backup edge device is not permitted to reroute the packet a second time.

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