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    Loop mitigation mechanism for ethernet networks
    3.
    发明授权
    Loop mitigation mechanism for ethernet networks 有权
    以太网络环路缓解机制

    公开(公告)号：US08681641B1

    公开(公告)日：2014-03-25

    申请号：US12146345

    申请日：2008-06-25

    申请人： Ali Sajassi ,  Norman Finn ,  Francois Tallet

    发明人： Ali Sajassi ,  Norman Finn ,  Francois Tallet

    IPC分类号： H04J1/16 ,  H04L12/28 ,  H04L12/56 ,  H04J3/14 ,  H04L1/00

    CPC分类号： H04L45/745 ,  H04L1/00 ,  H04L12/462 ,  H04L12/4641 ,  H04L45/18

    摘要： A technique is provided for mitigating loops in Ethernet networks. A first port in an Ethernet device receives an Ethernet frame. The frame includes a source identifier, a destination identifier, and a Virtual Local Area Network Identifier (VLAN ID). According to various embodiments, the VLAN ID (VID) has the encoding of both a community group as well as a source bridge ID. A VID database is accessed using the destination identifier and the VID to determine whether the first port has ingress enabled. A filtering database is accessed to determine an egress port for forwarding the Ethernet frame.

    摘要翻译： 提供了一种减轻以太网网络环路的技术。 以太网设备中的第一个端口接收以太网帧。 该帧包括源标识符，目的地标识符和虚拟局域网标识符（VLAN ID）。 根据各种实施例，VLAN ID（VID）具有社区组以及源网桥ID的编码。 使用目标标识符和VID访问VID数据库，以确定第一个端口是否启用了入口。 访问过滤数据库以确定用于转发以太网帧的出口端口。

    Methods and devices for improving the multiple spanning tree protocol
    4.
    发明授权
    Methods and devices for improving the multiple spanning tree protocol 有权
    改进多生成树协议的方法和设备

    公开(公告)号：US07889681B2

    公开(公告)日：2011-02-15

    申请号：US11182564

    申请日：2005-07-14

    申请人： Norman Finn

    发明人： Norman Finn

    IPC分类号： H04L12/28

    CPC分类号： H04L12/462 ,  H04L12/4633 ,  H04L12/4645 ,  H04L45/00 ,  H04L45/16 ,  H04L45/48

    摘要： The present invention provides improved unicast routing, multicast routing and unicast load sharing as compared with conventional methods. Preferred implementations of the invention provide improvements to IEEE 802.1Q. According to preferred aspects of the invention, each bridge is the root of its own multiple spanning tree instance (“MSTI”). Preferred implementations of the invention require no learning of media access control (“MAC”) addresses on the backbone of a network. Some methods of the invention can resolve spanning tree asymmetries. Preferred implementations of the invention require a very low computational load for control protocols.

    摘要翻译： 与常规方法相比，本发明提供了改进的单播路由，组播路由和单播负载共享。 本发明的优选实现提供了对IEEE 802.1Q的改进。 根据本发明的优选方面，每个桥是其自己的多生成树实例（“MSTI”）的根。 本发明的优选实现不需要在网络的骨干网上学习媒体访问控制（“MAC”）地址。 本发明的一些方法可以解决生成树不对称。 对于控制协议，本发明的优选实现需要非常低的计算负荷。

    Broadband access node with a virtual maintenance end point
    6.
    发明申请
    Broadband access node with a virtual maintenance end point 有权
    具有虚拟维护端点的宽带接入节点

    公开(公告)号：US20070025256A1

    公开(公告)日：2007-02-01

    申请号：US11180003

    申请日：2005-07-12

    申请人： Yves Hertoghs ,  Ali Sajassi ,  Norman Finn ,  Wojciech Dec

    发明人： Yves Hertoghs ,  Ali Sajassi ,  Norman Finn ,  Wojciech Dec

    IPC分类号： H04L12/26

    CPC分类号： H04L12/4633

    摘要： A broadband access node includes a port for connection with a Digital Subscriber Line and a processor to run code that implements a virtual maintenance end point (vMEP). The vMEP translates an IEEE 802.1ag Loopback Message (LBM) received from a device on an Ethernet access network into a legacy operations and maintenance (OAM) message that is transmitted to a residential gateway (RG) device. The legacy OAM message determines a link-level connectivity status between broadband access node and the RG device. The vMEP also transmits a reply message back to the device on an Ethernet access network in compliance with the IEEE 802.1ag specification. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

    摘要翻译： 宽带接入节点包括用于与数字用户线路连接的端口和用于运行实现虚拟维护终点（vMEP）的代码的处理器。 vMEP将从以太网接入网络上的设备接收的IEEE 802.1ag环回消息（LBM）转换为传输到住宅网关（RG）设备的传统操作和维护（OAM）消息。 传统的OAM消息确定宽带接入节点和RG设备之间的链路级连接状态。 vMEP还根据IEEE 802.1ag规范在以太网接入网络上发送回应消息给设备。 要强调的是，该摘要被提供以符合要求抽象的规则，允许搜索者或其他读者快速确定技术公开内容的主题。 提交它的理解是，它不会用于解释或限制权利要求的范围或含义。 37 CFR 1.72（b）。

    Method and system for transporting data using pseudowire circuits over a bridged network
    7.
    发明申请
    Method and system for transporting data using pseudowire circuits over a bridged network 有权
    在桥接网络上使用伪线路传输数据的方法和系统

    公开(公告)号：US20060146832A1

    公开(公告)日：2006-07-06

    申请号：US11029708

    申请日：2005-01-05

    申请人： Sanjeev Rampal ,  Jimmy Ervin ,  Norman Finn ,  Michael Smith

    发明人： Sanjeev Rampal ,  Jimmy Ervin ,  Norman Finn ,  Michael Smith

    IPC分类号： H04L12/56

    CPC分类号： H04L12/46

    摘要： A method for data communication across a layer 2 bridged network having two or more edge nodes configured for receiving and transmitting multiprotocol data packets. The method includes creating a pseudowire circuit across the bridged network, receiving data packets at one of the edge nodes, encapsulating data packets into pseudowire frames, encapsulating the pseudowire frames inside MAC frames, and transmitting the encapsulated frames over the carrier bridged network.

    摘要翻译： 一种用于跨第二层桥接网络进行数据通信的方法，该网络具有被配置用于接收和发送多协议数据分组的两个或多个边缘节点。 该方法包括跨越桥接网络创建伪线电路，在边缘节点之一处接收数据分组，将数据分组封装成伪线帧，将伪线帧封装在MAC帧内，以及通过载波桥接网络传输封装帧。

    Interswitch link mechanism for connecting high-performance network switches
    8.
    发明授权
    Interswitch link mechanism for connecting high-performance network switches 失效
    用于连接高性能网络交换机的交换机连接机制

    公开(公告)号：US5742604A

    公开(公告)日：1998-04-21

    申请号：US623142

    申请日：1996-03-28

    申请人： Tom Edsall ,  Norman Finn

    发明人： Tom Edsall ,  Norman Finn

    IPC分类号： H04L12/46 ,  H04L12/56 ,  H04L12/66

    CPC分类号： H04L12/46 ,  H04L12/467 ,  H04L49/354 ,  H04L2212/00 ,  H04L49/351

    摘要： An encapsulation mechanism efficiently transports packets between ports of different switches in a network on the basis of, inter alia, virtual local area network (VLAN) associations among those ports. The switches are preferably interconnected by a novel interswitch link (ISL) mechanism that appends ISL destination and source information, along with ISL error detection information, to VLAN-modified packets. The ISL mechanism keeps the VLAN associations of the packets intact during transfer between the switches in accordance with a high-performance switching bus architecture.

    摘要翻译： 基于这些端口之间的虚拟局域网（VLAN）关联，封装机制在网络中的不同交换机的端口之间有效地传输分组。 交换机最好通过将ISL目的地和源信息连同ISL错误检测信息一起附加到VLAN修改的分组的新颖的交换机间链路（ISL）机制来互连。 ISL机制根据高性能交换总线架构，在交换机之间传输过程中保持数据包的VLAN关联。

    DETECTING VLAN REGISTRATION PROTOCOL CAPABILITY OF A SWITCH IN A COMPUTER NETWORK
    9.
    发明申请
    DETECTING VLAN REGISTRATION PROTOCOL CAPABILITY OF A SWITCH IN A COMPUTER NETWORK 有权
    检测计算机网络中的交换机的VLAN注册协议能力

    公开(公告)号：US20140064286A1

    公开(公告)日：2014-03-06

    申请号：US13596997

    申请日：2012-08-28

    申请人： Sudarshana K.S. ,  Vinutha Mohan Rao ,  M. Radhakrishna Rao ,  Norman Finn

    发明人： Sudarshana K.S. ,  Vinutha Mohan Rao ,  M. Radhakrishna Rao ,  Norman Finn

    IPC分类号： H04L12/28

    CPC分类号： H04L12/4679 ,  H04L12/4687 ,  H04L12/4695 ,  Y02D30/30

    摘要： In particular embodiments, a first switch implementing a first virtual local area network (VLAN) registration protocol and connected to a first end of the trunk detects whether a second switch connected to a second end of the trunk implements the first VLAN registration protocol. In an embodiment, the second switch may send an unsolicited message to the first switch indicating the VLAN registration protocol implemented by the second switch. The first switch may then determine the VLAN registration protocol implemented by the second switch. Alternatively, the first switch may send a solicited message to the second switch. By receiving a response to the solicited message, the first switch can determine that the second switch implements the first VLAN registration protocol. In response to determining that the second switch implements the first VLAN registration protocol, the first switch may enable a pruning technique in accordance with the first VLAN registration protocol.

    摘要翻译： 在特定实施例中，实现第一虚拟局域网（VLAN）注册协议并连接到中继的第一端的第一交换机检测连接到中继的第二端的第二交换机是否实现第一VLAN注册协议。 在一个实施例中，第二交换机可以向第一交换机发送指示由第二交换机实现的VLAN注册协议的非请求消息。 第一交换机然后可以确定由第二交换机实现的VLAN注册协议。 或者，第一交换机可以向第二交换机发送请求消息。 通过接收对请求消息的响应，第一交换机可以确定第二交换机实现第一VLAN注册协议。 响应于确定第二交换机实现第一VLAN注册协议，第一交换机可以根据第一VLAN注册协议启用修剪技术。

    Technique for efficiently managing bandwidth registration for multiple spanning tree options
    10.
    发明申请
    Technique for efficiently managing bandwidth registration for multiple spanning tree options 有权
    用于有效管理多个生成树选项的带宽注册的技术

    公开(公告)号：US20070263554A1

    公开(公告)日：2007-11-15

    申请号：US11431428

    申请日：2006-05-10

    申请人： Norman Finn

    发明人： Norman Finn

    IPC分类号： H04L12/28

    CPC分类号： H04L12/4691 ,  H04L12/462 ,  H04L12/4641 ,  H04L45/12 ,  H04L45/48

    摘要： A technique efficiently manages bandwidth (BW) registration for multiple spanning tree options in a computer network. According to the novel technique, an entry bridge determines multiple spanning tree paths to other bridges of the network (namely, one or more available spanning trees rooted at one or more bridges of the network) and determines a utilized (registered) BW on each of those paths. Upon receiving a request to initiate BW registration for a data flow to a destination end point, e.g., from an application source end point, the entry bridge selects one of the spanning tree paths to utilize for the data flow. Selection of the spanning tree path from among the multiple available paths may be based on (i) available bandwidth of the paths, (ii) a shortest of the paths, and (iii) a lowest bridge identifier ID for the bridge root for the path. The entry bridge sends a registration message for the data flow towards the destination end point along the selected spanning tree path. If successful, the data flow is transmitted on the selected path. If not, the entry bridge attempts to register the data flow on a next best alternate spanning tree, e.g., until a successful registration or until a determination that no further alternate spanning trees exist.

    摘要翻译： 技术有效地管理计算机网络中的多个生成树选项的带宽（BW）注册。 根据新颖的技术，入口桥接器确定到网络的其他网桥的多个生成树路径（即，一个或多个根据网络的一个或多个网桥的可用生成树），并确定每个 那些路径。 在接收到针对目的地端点（例如从应用源端点）的数据流发起BW注册的请求时，入口网桥选择用于数据流的生成树路径之一。 从多个可用路径中选择生成树路径可以基于（i）路径的可用带宽，（ii）最短路径，以及（iii）用于路径的桥根的最低桥标识符ID 。 入口桥沿着所选择的生成树路径向目的地端点发送数据流的注册消息。 如果成功，数据流将在所选路径上传输。 如果不是，入口桥将尝试将数据流注册在下一个最佳备用生成树上，例如，直到成功注册或直到确定不存在另外的备用生成树为止。