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    TECHNIQUE FOR EFFICIENTLY AND DYNAMICALLY MAINTAINING BIDIRECTIONAL FORWARDING DETECTION ON A BUNDLE OF LINKS
    1.
    发明申请
    TECHNIQUE FOR EFFICIENTLY AND DYNAMICALLY MAINTAINING BIDIRECTIONAL FORWARDING DETECTION ON A BUNDLE OF LINKS 审中-公开
    有效和动态维护链路上的双向前向检测技术

    公开(公告)号：US20140019614A1

    公开(公告)日：2014-01-16

    申请号：US14028026

    申请日：2013-09-16

    Applicant: Cisco Technology, Inc.

    Inventor： Reshad A. Rahman ,  David P. Toscano ,  Sylvain Masse ,  David D. Ward ,  Neil R. Ketley

    IPC: H04L12/26

    CPC classification number: H04L43/10 ,  H04L41/0663 ,  H04L45/00 ,  H04L45/22 ,  H04L45/24 ,  H04L45/245 ,  H04L45/28 ,  H04L45/58 ,  H04L45/60 ,  H04Q2011/0081 ,  H04Q2213/13162 ,  Y02D50/30

    Abstract: In one embodiment, a plurality of links between a network node and another network node are configured as a link bundle. The network node establishes one or more standby bidirectional forwarding detection (BFD) sessions. Each standby BFD session is associated with one or more links of the link bundle. The network node establishes an active BFD session. The active BFD session is associated with one or more links of the link bundle. In response to non-receipt of returned BFD messages for the active BFD session, one or more new active BFD sessions are selected from the one or more standby BFD sessions. In response to non-receipt of returned BFD messages for the one or more new active BFD sessions, it is determined that the link bundle has failed.

    Abstract translation: 在一个实施例中，网络节点和另一个网络节点之间的多个链路被配置为链路束。 网络节点建立一个或多个备用双向转发检测（BFD）会话。 每个备用BFD会话与链路束的一个或多个链路相关联。 网络节点建立活动的BFD会话。 活动BFD会话与链路束的一个或多个链路相关联。 响应未接收到活动BFD会话的返回BFD报文，从一个或多个备用BFD会话中选择一个或多个新的活动BFD会话。 响应未收到一个或多个新的活动BFD会话的返回BFD消息，确定链路束已失败。

    DISTINGUISHING BETWEEN CONNECTIVITY VERIFICATION AVAILABILITY AND FORWARDING PROTOCOL FUNCTIONALITY IN A COMPUTER NETWORK
    2.
    发明申请
    DISTINGUISHING BETWEEN CONNECTIVITY VERIFICATION AVAILABILITY AND FORWARDING PROTOCOL FUNCTIONALITY IN A COMPUTER NETWORK 审中-公开
    连接验证可用性和计算机网络中的前向协议功能之间的差异

    公开(公告)号：US20130229909A1

    公开(公告)日：2013-09-05

    申请号：US13861939

    申请日：2013-04-12

    Applicant: CISCO TECHNOLOGY, INC.

    Inventor： Reshad A. Rahman ,  David P. Toscano ,  Sylvain Masse ,  Jonathan Parker ,  David D. Ward

    IPC: H04L12/24

    CPC classification number: H04L41/0695 ,  H04L69/16

    Abstract: In one embodiment, a local network device transmits a connectivity verification protocol control message over a link to a remote network device to attempt to establish a connectivity verification protocol session with the remote network device. In response to non-receipt of a returned connectivity verification protocol control message from the remote network device, the local network device determines that there is an inability to establish a connectivity verification protocol session with the remote network device. The local network device then sends a connectivity verification protocol echo message over the link to the remote network device without establishment of a connectivity verification protocol session. The echo message is sent using a forwarding protocol. In response to receipt of a reply to the connectivity verification protocol echo message from the remote network device, the local network device determines that the forwarding protocol is functioning and uses the link to forward data traffic to the remote network device.

    Abstract translation: 在一个实施例中，本地网络设备通过到远程网络设备的链路发送连接性验证协议控制消息，以尝试与远程网络设备建立连接性验证协议会话。 响应于从远程网络设备未收到返回的连接性验证协议控制消息，本地网络设备确定无法与远程网络设备建立连接性验证协议会话。 然后，本地网络设备通过链路向远程网络设备发送连接验证协议回传消息，而不建立连接性验证协议会话。 使用转发协议发送回发消息。 响应于从远程网络设备接收到对连接性验证协议回传消息的回复，本地网络设备确定转发协议正在工作，并使用链路将数据业务转发到远程网络设备。

    Distinguishing between connectivity verification availability and forwarding protocol functionality in a computer network
    4.
    发明授权
    Distinguishing between connectivity verification availability and forwarding protocol functionality in a computer network 有权
    区分计算机网络中的连接性验证可用性和转发协议功能

    公开(公告)号：US09166877B2

    公开(公告)日：2015-10-20

    申请号：US13861939

    申请日：2013-04-12

    Applicant: Cisco Technology, Inc.

    Inventor： Reshad A. Rahman ,  David P. Toscano ,  Sylvain Masse ,  Jonathan Parker ,  David D. Ward

    IPC: G01R31/08 ,  H04L12/24 ,  H04L29/06

    CPC classification number: H04L41/0695 ,  H04L69/16

    Abstract: In one embodiment, a local network device transmits a connectivity verification protocol control message over a link to a remote network device to attempt to establish a connectivity verification protocol session with the remote network device. In response to non-receipt of a returned connectivity verification protocol control message from the remote network device, the local network device determines that there is an inability to establish a connectivity verification protocol session with the remote network device. The local network device then sends a connectivity verification protocol echo message over the link to the remote network device without establishment of a connectivity verification protocol session. The echo message is sent using a forwarding protocol. In response to receipt of a reply to the connectivity verification protocol echo message from the remote network device, the local network device determines that the forwarding protocol is functioning and uses the link to forward data traffic to the remote network device.

    Abstract translation: 在一个实施例中，本地网络设备通过到远程网络设备的链路发送连接性验证协议控制消息，以尝试与远程网络设备建立连接性验证协议会话。 响应于从远程网络设备未收到返回的连接性验证协议控制消息，本地网络设备确定无法与远程网络设备建立连接性验证协议会话。 然后，本地网络设备通过链路向远程网络设备发送连接验证协议回传消息，而不建立连接性验证协议会话。 使用转发协议发送回发消息。 响应于从远程网络设备接收到对连接性验证协议回传消息的回复，本地网络设备确定转发协议正在工作，并使用链路将数据业务转发到远程网络设备。

    DISTRIBUTED CONNECTIVITY VERIFICATION PROTOCOL REDUNDANCY
    5.
    发明申请
    DISTRIBUTED CONNECTIVITY VERIFICATION PROTOCOL REDUNDANCY 审中-公开
    分布式连接验证协议冗余

    公开(公告)号：US20150085860A1

    公开(公告)日：2015-03-26

    申请号：US14500046

    申请日：2014-09-29

    Applicant: Cisco Technology, Inc.

    Inventor： Sami Boutros ,  Sylvain Masse ,  Clarence Filsfils

    IPC: H04L12/26 ,  H04L29/06 ,  H04L12/709

    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）的连接性验证协议（CVP）会话可以在网络设备上的两个或多个线路卡（LC）的特定组上操作。 然后，LC组可以以足够的速率传输CVP会话分组，该速率足以通过协商的CVP全速率将CVP会话维持在通过网络设备上的入口路径处理的特定VI上。 入口路径处理特别是将传输的CVP会话数据包发送到当前负责VI出口的网络设备的适当LC上。 此外，响应于在当前负责VI入口的网络设备的LC上接收到针对VI的CVP会话分组，接收LC可以将接收的CVP会话分组转发到特定对应的LC组，然后可以处理接收的 CVP会话数据包。

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