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公开(公告)号：US20060206656A1
公开(公告)日：2006-09-14
申请号：US11434471
申请日：2006-05-15
申请人： Marco Di Benedetto , Umesh Mahajan , Silvano Gai
发明人： Marco Di Benedetto , Umesh Mahajan , Silvano Gai
IPC分类号： G06F13/00
摘要： A network device is configured in a manner to prevent connectivity loops such as one way connectivity loops. A user configures a port of the network device to have an associated state. The state indicates that the port is for communication up the spanning tree towards a root network device, or down the spanning tree away from the root network device. The spanning tree protocol is then executed and determines a role for the port. The role determined by the spanning tree protocol is compared to the user selected state, and if there is an inconsistency, for example one that would indicate a one way connectivity loop, the port is blocked.
摘要翻译： 网络设备被配置为防止连接环路，例如单向连接环路。 用户将网络设备的端口配置为具有关联状态。 状态表示该端口用于向生成树向根网络设备进行通信，或者将该生成树从根网络设备远离。 然后执行生成树协议并确定端口的角色。 将生成树协议确定的角色与用户选择的状态进行比较，如果存在不一致，例如指示单向连接环路的端口，则该端口被阻止。
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2.发明授权Apparatus and method for preventing one way connectivity loops in a computer network 失效用于防止计算机网络中的单向连接环路的装置和方法公开(公告)号：US07076594B2
公开(公告)日：2006-07-11
申请号：US09747676
申请日：2000-12-22
申请人： Marco Di Benedetto , Umesh Mahajan , Silvano Gai
发明人： Marco Di Benedetto , Umesh Mahajan , Silvano Gai
IPC分类号： G06F1/00
摘要： Ports of a switch are assigned by a person, for example a network manager, to be for communication up the spanning tree toward the root switch (“up ports”), or down the spanning tree away from the root switch (“down ports”). This assignment is made by enabling “Uplinkguard” status for a desired up port, and by connecting the desired port to a switch which it is desired to place in the higher layer of the spanning tree. A port having Uplinkguard enabled is prevented, for example by software or firmware in its switch, from transitioning to a designated role. Uplinkguard-enabling a port, by preventing the port from transitioning to the designated role, has at least two consequences: preventing the port from being selected by the STP to transmit to lower switches in the spanning tree; and, preventing the port from transmitting when a one way connectivity fault develops on that port. A port with Uplinkguard enabled may transition to root port role. In the event that there is one way connectivity from a port, that port will not receive BPDU messages, and if the port is in blocked state, it will believe that it should take over and become the designated port for the external link to which it is connected. Uplinkguard prevents the port from transitioning to designated role. When the port attempts to transition into designated role, Uplinkguard forces the port to transition into blocked role, thereby eliminating formation of loops caused by one way connectivity faults.
摘要翻译： 交换机的端口由一个人（例如网络管理器）分配，用于向生成树向根交换机（“上行端口”）通信，或者从根交换机（“向下端口”）向下生成树 ）。 通过为所需的上行端口启用“上行链路保护”状态，并将期望的端口连接到希望放置在生成树的较高层中的交换机进行此分配。 启用了启用了Uplinkguard的端口，例如通过其切换中的软件或固件，从转换到指定的角色。 通过防止端口转移到指定角色，上行链路启用端口至少有两个后果：防止端口被STP选择发送到生成树中的下层交换机; 并且在该端口上发生单向连接故障时，防止端口发送。 启用了Uplinkguard的端口可能会转换到根端口角色。 在端口有单向连接的情况下，该端口不会收到BPDU消息，如果该端口处于阻塞状态，则认为该端口将被接管并成为其所在外部链路的指定端口 已连接。 上行链路防止端口转换到指定的角色。 当端口尝试转换为指定角色时，上行链路强制端口转换为阻塞角色，从而消除由单向连接故障引起的环路形成。
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公开(公告)号：US07412557B2
公开(公告)日：2008-08-12
申请号：US11434471
申请日：2006-05-15
申请人： Marco Di Benedetto , Umesh Mahajan , Silvano Gai
发明人： Marco Di Benedetto , Umesh Mahajan , Silvano Gai
IPC分类号： G06F13/00
摘要： A network device is configured in a manner to prevent connectivity loops such as one way connectivity loops. A user configures a port of the network device to have an associated state. The state indicates that the port is for communication up the spanning tree towards a root network device, or down the spanning tree away from the root network device. The spanning tree protocol is then executed and determines a role for the port. The role determined by the spanning tree protocol is compared to the user selected state, and if there is an inconsistency, for example one that would indicate a one way connectivity loop, the port is blocked.
摘要翻译： 网络设备被配置为防止连接环路，例如单向连接环路。 用户将网络设备的端口配置为具有关联状态。 状态表示该端口用于向生成树向根网络设备进行通信，或者将该生成树从根网络设备远离。 然后执行生成树协议并确定端口的角色。 将生成树协议确定的角色与用户选择的状态进行比较，如果存在不一致，例如指示单向连接环路的端口，则该端口被阻止。
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公开(公告)号：US08514856B1
公开(公告)日：2013-08-20
申请号：US12822551
申请日：2010-06-24
申请人： Silvano Gai , Claudio Desanti , Marco Di Benedetto
发明人： Silvano Gai , Claudio Desanti , Marco Di Benedetto
IPC分类号： H04L12/56
CPC分类号： H04L29/08702 , H04L12/462 , H04L49/351 , H04L49/357 , H04L49/602
摘要： In one embodiment, one or more Fiber Channel over Ethernet (FCoE) proxy points (FPPs) communicates control and management information with a separately housed FCoE control and management plane (F-CMP) server in order to direct data plane functionality of the FPPs. Each FPP also proxies control and management protocols between the F-CMP server and one or more FCoE end-point devices for which the FPP is responsible (on FCoE ports). Traffic received by the FPP may then be processed according to the directed data plane functionality, such that FCoE traffic transmitted between first and second FCoE end-point devices separated by the Ethernet network is directed over the Ethernet network end-to-end between correspondingly responsible FPPs without traversing the F-CMP server.
摘要翻译： 在一个实施例中，一个或多个以太网光纤通道（FCoE）代理点（FPP）通过单独容纳的FCoE控制和管理平面（F-CMP）服务器来传送控制和管理信息，以便引导FPP的数据平面功能。 每个FPP还代理F-CMP服务器与FPP负责的一个或多个FCoE端点设备（FCoE端口）之间的控制和管理协议。 然后可以根据定向数据平面功能来处理由FPP接收的业务，使得由以太网网络分离的第一和第二FCoE端点设备之间传输的FCoE流量在相应负责的端到端 FPP不经过F-CMP服务器。
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公开(公告)号：US07599284B1
公开(公告)日：2009-10-06
申请号：US11130286
申请日：2005-05-16
IPC分类号： G01R31/08 , H04L12/28 , G06F15/177
CPC分类号： H04L45/00 , H04L41/00 , H04L45/48 , H04L45/586
摘要： A method and apparatus for continuing the operation of a spanning tree protocol at a network device despite crashes or failures at that device is disclosed. The network device includes a plurality of line cards having ports for receiving and forwarding messages and a plurality of supervisor cards for processing at least some of those messages. Upon start-up, one of the supervisor cards is designated the active supervisor, while all other supervisor cards are designated standby supervisors. The active supervisor runs the spanning tree protocol (STP). The active supervisor informs the standby supervisors of the states of ports set by the STP. When a crash or failure occurs at the active supervisor, one of the standby supervisors is immediately designated to be the new active supervisor, and the new active supervisor uses the states of ports set by the original STP.
摘要翻译： 一种用于在网络设备上继续执行生成树协议的方法和装置，尽管公开了该设备上的故障或故障。 网络设备包括具有用于接收和转发消息的端口的多个线路卡和用于处理这些消息中的至少一些的多个管理卡。 启动时，其中一个主管卡被指定为主管，而所有其他主管卡都被指定为备用主管。 活动主管运行生成树协议（STP）。 主动主管向备用主管通知STP设置的端口状态。 当主动管理员发生故障或故障时，其中一个备用主管立即被指定为新的主动管理员，新的主管主管使用原始STP设置的端口状态。
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公开(公告)号：US07545757B2
公开(公告)日：2009-06-09
申请号：US11292652
申请日：2005-12-02
IPC分类号： H04L12/28 , H04L12/56 , G06F15/177 , G06F15/143 , G06F15/16
摘要： A method of managing a computer network switch is disclosed. The method has the steps of: setting a port of the switch to root guard protected status (RG status); selecting by a spanning tree protocol (STP) the port as a designated port; and setting said port into blocked status, in response to said port being both in root guard protected status and selected by STP as a root port. By setting a port to root guard protected, the port is prevented from becoming a designated port, and so then forcing the root port to remain in a desired core network.
摘要翻译： 公开了一种管理计算机网络交换机的方法。 该方法具有以下步骤：将交换机的端口设置为根保护状态（RG状态）; 通过生成树协议（STP）选择端口作为指定端口; 并将所述端口设置为阻塞状态，以响应所述端口都处于根保护保护状态，并且由STP作为根端口选择。 通过将端口设置为保护保护，防止端口成为指定端口，从而强制根端口保留在所需的核心网络中。
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公开(公告)号：US06987740B1
公开(公告)日：2006-01-17
申请号：US09658880
申请日：2000-09-11
IPC分类号： H04L12/28
摘要： The Spanning Tree Protocol (STP) chooses a root switch. Each of the other switches has a “root” port and one or more “designated ports(s)” chosen by STP. Packets are transmitted upstream toward the root switch through the root port, and packets designated for downstream switches from the root switch are received by the root port and transmitted through the designated ports. In the invention, an administrator of the core network identifies which switch ports in the core network are boundary ports to customer networks. The administrator designates the boundary ports as “root guard protected” ports (RG ports). The STP then executes as required by the ordinary STP protocol, and if a RG port is selected by the STP to be a root portm then the status of the port is set to “blocked,” and no packets are transmitted through the port.
摘要翻译： 生成树协议（STP）选择根交换机。 每个其他交换机具有“根”端口和一个或多个由STP选择的“指定端口”。 数据包通过根端口向根交换机上游传输，根交换机指定用于下游交换机的数据包由根端口接收并通过指定端口传输。 在本发明中，核心网络的管理员识别核心网络中哪些交换机端口是到客户网络的边界端口。 管理员将边界端口指定为“根保护保护”端口（RG端口）。 STP然后根据普通STP协议的要求执行，如果由STP选择RG端口作为根端口，则端口的状态被设置为“阻塞”，并且不会通过端口传输数据包。
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公开(公告)号：US06898189B1
公开(公告)日：2005-05-24
申请号：US09644377
申请日：2000-08-23
CPC分类号： H04L45/00 , H04L41/00 , H04L45/48 , H04L45/586
摘要： A method and apparatus for continuing the operation of a spanning tree protocol at a network device despite crashes or failures at that device. A supervisor card contained in the network device is designated an active supervisor, while all other supervisor cards are designated standby supervisors. The active supervisor runs the spanning tree protocol, and informs the standby supervisors of the states of ports, but not of the identity of the root or designated bridges. When a crash or failure occurs at the active supervisor, one of the standby supervisors is immediately designated to be the new active supervisor. The newly active supervisor reviews the port state, and queries the line cards to determine whether that port state information is still valid. The newly active supervisor adopts the valid port state information, leaving those ports in their current spanning tree port state.
摘要翻译： 一种用于在网络设备上继续执行生成树协议的方法和装置，尽管在该设备上发生故障或故障。 包含在网络设备中的主管卡被指定为主管主管，而所有其他管理卡被指定为备用主管。 主动管理器运行生成树协议，并向备用主管通知端口状态，但不指定根或指定网桥的身份。 当主动主管发生故障或故障时，其中一个备用主管将被立即指定为新的主动主管。 最新的主管审查端口状态，并查询线卡以确定该端口状态信息是否仍然有效。 新主管主管采用有效的端口状态信息，使端口处于当前生成树端口状态。
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9.发明授权Methods and apparatus for implementing a high availability fibre channel switch 有权实现高可用性光纤通道切换的方法和装置公开(公告)号：US07293105B2
公开(公告)日：2007-11-06
申请号：US10026311
申请日：2001-12-21
IPC分类号： G06F15/173
CPC分类号： G06F11/2097 , G06F11/1675 , G06F11/2038 , H04L29/06 , H04L67/1095 , H04L67/1097 , H04L67/2852 , H04L69/329
摘要： High availability for a fibre channel switch in a storage area network can be implemented using redundant supervisors. An active supervisor can identify high availability characteristics associated with a message and determine whether the message should be mirrored onto a redundant supervisor, logged, and/or made persistent. Messages can be logged in a pending transaction buffer and stored using persistent storage services. Mirroring can be performed using synchronization queues that allow messages to be passed asynchronously to a redundant supervisor while maintaining full synchronization between supervisors and causing little delay to operation of the active supervisor.
摘要翻译： 存储区域网络中光纤通道交换机的高可用性可以使用冗余监控器来实现。 活动主管可以识别与消息相关联的高可用性特征，并确定消息是否应该镜像到冗余监控器上，记录和/或持久化。 消息可以记录在待处理的事务缓冲区中，并使用持久存储服务进行存储。 可以使用允许将消息异步传递到冗余管理器的同步队列执行镜像，同时保持主管之间的完全同步，并且对活动主管的操作几乎没有延迟。
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公开(公告)号：US08165043B2
公开(公告)日：2012-04-24
申请号：US11185057
申请日：2005-07-20
IPC分类号： H04L12/28
CPC分类号： H04L12/4641 , H04L12/462 , H04L12/4691 , H04L12/4695 , H04L45/02 , H04L45/48
摘要： A multiple instance spanning tree protocol (MI-STP) creates a plurality of active topologies (i.e., loop-free paths) within a computer network. These active topologies may be established through the exchange and processing of multiple instance spanning tree bridge protocol data unit messages (MI-STP BPDUs) by the intermediate network devices within the network. The active topologies are preferably created independently of any virtual local area network (VLAN) designations defined within the network. Once the active topologies are defined, each VLAN designation is then mapped to a single active topology, although multiple VLAN designations are preferably mapped to the same active topology to provide load balancing.
摘要翻译： 多实例生成树协议（MI-STP）在计算机网络内创建多个活动拓扑（即，无环路径）。 这些活动拓扑可以通过网络中的中间网络设备交换和处理多个实例生成树桥协议数据单元消息（MI-STP BPDU）来建立。 活动拓扑优选地独立于在网络内定义的任何虚拟局域网（VLAN）指定而创建。 一旦定义了活动拓扑，则每个VLAN标识然后映射到单个活动拓扑，尽管多个VLAN名称最好映射到相同的活动拓扑以提供负载平衡。
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