Method and apparatus for updating provider domain due to customer TCNs
    31.
    发明授权
    Method and apparatus for updating provider domain due to customer TCNs 有权
    用于客户TCN更新提供商域的方法和装置

    公开(公告)号:US08031630B2

    公开(公告)日:2011-10-04

    申请号:US10737219

    申请日:2003-12-16

    IPC分类号: H04L12/28

    CPC分类号: H04L12/4625 H04L12/4641

    摘要: Customer virtual local area networks (C-VLANs) connecting multiple LAN segments are set up through a provider network (12). Provider edge bridges (PEs) are coupled to customer edge bridges (CEs) to provide a transparent link between LAN segments. To determine whether a backdoor link is used in the C-VLAN topology, PEs monitor MAC address from a predetermined time after a TCN is received to determine if there are contradictory addresses or new addresses relative to the existing MAC address tables (or forwarding databases) that are indicative of a backdoor link. If so, an unlearning message is sent to bridges in the provider domain. In another embodiment, CEs set a snoop bit to indicate which TCNs must be snooped.

    摘要翻译: 通过提供商网络(12)设置连接多个LAN段的客户虚拟局域网(C-VLAN)。 提供商边缘网桥(PE)耦合到客户边缘网桥(CE),以提供LAN段之间的透明链路。 为了确定在C-VLAN拓扑中是否使用后门链路,PE在接收到TCN之后的预定时间内监视MAC地址,以确定相对于现有MAC地址表(或转发数据库)是否存在矛盾地址或新地址, 这表示后门链接。 如果是这样,将向提供商域中的网桥发送一个不学习的消息。 在另一个实施例中,CE设置窥探位以指示哪个TCN必须被窥探。

    Method for reconvergence after failure in a dual-homing network environment
    33.
    发明申请
    Method for reconvergence after failure in a dual-homing network environment 有权
    双归网络环境故障后重新收敛的方法

    公开(公告)号:US20100329110A1

    公开(公告)日:2010-12-30

    申请号:US12459349

    申请日:2009-06-30

    IPC分类号: G06F11/00

    摘要: A manner of providing for re-convergence in a dual homing network following the failure of one of the dual homing links. When such a failure is detected, the port roles are recomputed using an xSTP protocol. Prior to the completion of the computation, the operEdge variable is set to true, typically resulting in a more rapid re-convergence that may achieve sub 50 ms performance. When the computation is complete, the operEdge variable is reset to “false. The xSTP protocol may be, for example, RSTP or MSTP. The invention may be implemented in a CE device attached to a VPLS core or other network, and may be used in a LAG environment.

    摘要翻译: 在双归属链路中的一个故障之后,在双归属网络中提供再收敛的方式。 当检测到这种故障时,使用xSTP协议重新计算端口角色。 在完成计算之前,operEdge变量设置为true,通常会导致更快速的重新收敛,从而可以实现低于50 ms的性能。 当计算完成时,operEdge变量将重置为“false”。 xSTP协议可以是例如RSTP或MSTP。 本发明可以在连接到VPLS核心或其他网络的CE设备中实现,并且可以在LAG环境中使用。

    Printer discovery protocol system and method
    34.
    发明授权
    Printer discovery protocol system and method 有权
    打印机发现协议系统和方法

    公开(公告)号:US07707312B2

    公开(公告)日:2010-04-27

    申请号:US10749993

    申请日:2003-12-31

    IPC分类号: G06F15/16

    摘要: A protocol for discovering a silent device, such as a printer, attached to a mobile port of a switching node. A command is transmitted to the switching node for associating an IP address for the silent device to a particular virtual local area network (VLAN). Entry of the command causes the switching node to start searching for the silent device on the mobile ports. As part of the searching process, an ARP request with the IP address provided in the command is sent to each mobile port of the switching node. When the silent device responds with its MAC address in an ARP reply message, the MAC address is learned in a layer 2 table used for making forwarding decisions of data units received by the switching node. Furthermore, the port where the silent device was discovered, that is, the port receiving the ARP reply message, is associated with the VLAN of the silent device.

    摘要翻译: 用于发现附接到交换节点的移动端口的诸如打印机的无声设备的协议。 将命令发送到交换节点,用于将静默设备的IP地址与特定的虚拟局域网(VLAN)相关联。 输入命令使交换节点开始搜索移动端口上的静音设备。 作为搜索过程的一部分,将在命令中提供的IP地址的ARP请求发送到交换节点的每个移动端口。 当静默设备在ARP应答消息中以其MAC地址进行响应时,在用于进行由交换节点接收的数据单元的转发决定的层2表中学习MAC地址。 此外,发现无声设备的端口,即接收ARP应答消息的端口与无声设备的VLAN相关联。

    Ring rapid spanning tree protocol
    35.
    发明授权
    Ring rapid spanning tree protocol 有权
    环快速生成树协议

    公开(公告)号:US07564779B2

    公开(公告)日:2009-07-21

    申请号:US11176874

    申请日:2005-07-07

    IPC分类号: H04L12/42

    CPC分类号: H04L12/66

    摘要: In a method for enabling facilitation of re-convergence, designation information for a first port of each one of a plurality of bridges in a multi-bridge ring is received and designation information for a second port of each one of a plurality of bridges in a multi-bridge ring is received. The first port of each one of a plurality of bridges is a first direction Ring Rapid Spanning Tree Protocol (RRSTP) port and the second port of each one of a plurality of bridges is a second direction RRSTP port. The first direction around the ring (e.g., a forward direction) is opposite the second direction around said ring (e.g., a backward direction). A first reserved MAC address is associated with the first direction port of each one of the bridges and a second reserved MAC address is associated with the second direction port of each one of the bridges.

    摘要翻译: 在能够促进再收敛的方法中,接收多桥环中的多个桥中的每一个的第一端口的指定信息,并且接收多个桥中的每一个桥的第二端口的指定信息 多桥环接收。 多个桥中的每一个的第一端口是第一方向环快速生成树协议(RRSTP)端口,并且多个桥中的每一个的第二端口是第二方向RRSTP端口。 围绕环的第一方向(例如,向前方向)与围绕所述环的第二方向(例如,向后方向)相反。 第一保留MAC地址与每个桥接器的第一方向端口相关联,并且第二保留MAC地址与每个桥接器的第二方向端口相关联。

    "> Deterministic operation of rapid spanning tree protocols for proper propagation of a
    36.
    发明申请
    Deterministic operation of rapid spanning tree protocols for proper propagation of a "cut" 有权
    快速生成树协议的确定性操作适当地传播“剪切”

    公开(公告)号:US20070226485A1

    公开(公告)日:2007-09-27

    申请号:US11389700

    申请日:2006-03-27

    IPC分类号: H04L9/00

    摘要: A bridge (e.g., IEEE 802.1 bridge) and a method are described herein which ensure the proper propagation of a “cut” within a bridged network (e.g., Ethernet-based bridged network). In one embodiment, the bridge has a port role transitions (PRT) state machine which uses a first condition represented as (proposed && !agree) to transit to an X_PROPOSED state and a second condition represented as (! proposed && allSynced && !agree) ∥ (proposed && agree) to transit to an X_AGREED state (where X represents “ROOT”, “ALTERNATE” and “MASTER”). The first condition and the second condition are both defined such that the X_PROPOSED state is always entered before the X_AGREED state which ensures the proper propagation of a “cut” within the bridged network.

    摘要翻译: 这里描述了一种桥接器(例如,IEEE802.1桥)和方法,其确保桥接网络(例如,基于以太网的桥接网络)内的“切断”的适当传播。 在一个实施例中,桥具有端口角色转换(PRT)状态机,其使用表示为(建议&&!同意)的第一条件转移到X_PROPOSED状态,第二条件表示为(!建议&& allSynced &&!同意) ∥(建议&&同意)转入X_AGREED状态(其中X表示“ROOT”,“ALTERNATE”和“MASTER”)。 第一条件和第二条件都被定义为使X_PROPOSED状态始终在X_AGREED状态之前输入,以确保桥接网络中“切断”的正确传播。

    Method and Network Element Configured for Limiting the Number of Virtual Local Area Networks Creatable by GVRP
    37.
    发明申请
    Method and Network Element Configured for Limiting the Number of Virtual Local Area Networks Creatable by GVRP 审中-公开
    配置了限制GVRP创建的虚拟局域网数量的方法和网元

    公开(公告)号:US20070036165A1

    公开(公告)日:2007-02-15

    申请号:US11459572

    申请日:2006-07-24

    IPC分类号: H04L12/56 H04L12/28

    摘要: A Layer 2 device configured for providing at least one of bridging and switching functionality in a local area network comprising computer readable instructions for providing GVRP functionality and computer-readable instructions for limiting the number of dynamic VLANs that the GVRP functionality creates on a Layer 2 device of a local area network and on all ports of a data plane card of the Layer 2 device.

    摘要翻译: 第二层设备,被配置为在局域网中提供桥接和交换功能中的至少一个,包括用于提供GVRP功能的计算机可读指令和用于限制GVRP功能在第2层设备上创建的动态VLAN的数量的计算机可读指令 的局域网和二层设备的数据平面卡的所有端口。