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公开(公告)号：US20050259597A1
公开(公告)日：2005-11-24
申请号：US11185057
申请日：2005-07-20
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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公开(公告)号：US06628624B1
公开(公告)日：2003-09-30
申请号：US09208175
申请日：1998-12-09
申请人： Umesh Mahajan , Ramana Mellacheruvu , Praveen Jain
发明人： Umesh Mahajan , Ramana Mellacheruvu , Praveen Jain
IPC分类号： H04L1242
CPC分类号： H04L45/48 , H04L12/462 , H04L45/02 , H04L45/18
摘要： A method and apparatus facilitates and enhances the operation of the spanning tree protocol in bridged computer networks. An intermediate network device in accordance with the present invention includes an enhanced spanning tree engine that is configured to perform certain novel functions. First, the enhanced spanning tree engine is configured to identify and block ports at which messages are looped-back to the transmitting port, thereby avoiding the creation of network loops. In second aspect, the enhanced spanning tree engine rapidly transitions certain ports to a forwarding state to prevent associated applications from timing out and shutting down. Rather than moving the ports through blocking, listening and learning states before reaching the forwarding state, selected ports may be transitioned directly to the forwarding state.
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13.发明授权Method of selectively and seamlessly segregating san traffic in I/O consolidated networks 有权在I / O综合网络中选择性和无缝地隔离SAN流量的方法公开(公告)号：US08917732B2
公开(公告)日：2014-12-23
申请号：US12551387
申请日：2009-08-31
CPC分类号： H04L47/803 , H04L12/46 , H04L12/4645 , H04L63/0236 , H04L63/0876 , H04L67/1097
摘要： Methods and apparatus for segregating traffic are disclosed. In accordance with one embodiment, a traffic splitter identifies a set of links coupled to the traffic splitter, where the set of links includes two or more uplinks, wherein each of the two or more uplinks are implemented in a common physical media. The two or more uplinks include a LAN uplink coupled to a LAN and a SAN uplink coupled to a SAN. The traffic splitter prevents SAN traffic from reaching the LAN via the LAN uplink. In addition, the traffic splitter prevents LAN traffic from reaching the SAN via the SAN uplink.
摘要翻译： 公开了用于隔离业务的方法和装置。 根据一个实施例，业务分配器识别耦合到业务分路器的一组链路，其中该组链路包括两个或更多个上行链路，其中两个或更多个上行链路中的每一个在公共物理介质中实现。 两个或更多个上行链路包括耦合到LAN的LAN上行链路和耦合到SAN的SAN上行链路。 流量分配器防止SAN流量通过LAN上行链路到达LAN。 此外，流量分配器防止LAN流量通过SAN上行链路到达SAN。
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公开(公告)号：US07756066B2
公开(公告)日：2010-07-13
申请号：US11329681
申请日：2006-01-10
IPC分类号： H04L12/28
摘要： Disclosed are methods and apparatus for restarting a first network device having a plurality of ports for receiving and transmitting layer 2 data. The first network device belongs to a network of network devices. When a restart of at least a portion of the first network device is imminent whereby STP is no longer functioning for the first network device during the restart and can no longer alter a spanning tree protocol (STP) state of one or more of the ports and such ports that remain in a fixed state during the restart are referred to as restarting ports, a current state (such as forwarding) of each restarting port is maintained during the restart under predefined conditions. During the restart, each of the restarting ports of the restarting network device portion cooperate with its peer port of a second non-restarting network device that is a neighbor of the first network device so as to prevent layer 2 loops in the network.
摘要翻译： 公开了用于重新启动具有用于接收和发送第二层数据的多个端口的第一网络设备的方法和装置。 第一个网络设备属于网络设备网络。 当第一网络设备的至少一部分的重新启动迫在眉睫，由此在重新启动期间STP不再对第一网络设备起作用，并且不能再改变一个或多个端口的生成树协议（STP）状态，并且 在重新启动期间保持在固定状态的端口被称为重新启动端口，在预定义条件下在重新启动期间维护每个重新启动端口的当前状态（例如转发）。 在重新启动期间，重新启动网络设备部分的每个重新启动端口与作为第一网络设备的邻居的第二非重新启动网络设备的对等端口协作，以防止网络中的第二层环路。
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15.发明申请METHOD OF SELECTIVELY AND SEAMLESSLY SEGREGATING SAN TRAFFIC IN I/O CONSOLIDATED NETWORKS 有权在I / O综合网络中选择性和无缝分隔SAN交通的方法公开(公告)号：US20100165994A1
公开(公告)日：2010-07-01
申请号：US12551387
申请日：2009-08-31
IPC分类号： H04L12/28 , G06F15/173
CPC分类号： H04L47/803 , H04L12/46 , H04L12/4645 , H04L63/0236 , H04L63/0876 , H04L67/1097
摘要： Methods and apparatus for segregating traffic are disclosed. In accordance with one embodiment, a traffic splitter identifies a set of links coupled to the traffic splitter, where the set of links includes two or more uplinks, wherein each of the two or more uplinks are implemented in a common physical media. The two or more uplinks include a LAN uplink coupled to a LAN and a SAN uplink coupled to a SAN. The traffic splitter prevents SAN traffic from reaching the LAN via the LAN uplink. In addition, the traffic splitter prevents LAN traffic from reaching the SAN via the SAN uplink.
摘要翻译： 公开了用于隔离业务的方法和装置。 根据一个实施例，业务分配器识别耦合到业务分路器的一组链路，其中该组链路包括两个或更多个上行链路，其中两个或更多个上行链路中的每一个在公共物理介质中实现。 两个或更多个上行链路包括耦合到LAN的LAN上行链路和耦合到SAN的SAN上行链路。 流量分配器防止SAN流量通过LAN上行链路到达LAN。 此外，流量分配器防止LAN流量通过SAN上行链路到达SAN。
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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：US20060092862A1
公开(公告)日：2006-05-04
申请号：US11292652
申请日：2005-12-02
IPC分类号： H04L12/28
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.
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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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公开(公告)号：US06804236B1
公开(公告)日：2004-10-12
申请号：US10266043
申请日：2002-10-07
IPC分类号： H04L1228
CPC分类号： H04L12/4641 , H04L12/467
摘要： Efficient switched network multicasting techniques are provided. Incoming multicast packets are processed by a central forwarding engine (CFE) in a network switch to generate forwarding indices used to make forwarding decisions for the packets based upon whether the packets are special multicast control packets or data packets. Forwarding of the special multicast control packets is determined by the switch's network management processor (NMP), while data packets are forwarded based upon conventional bridge forwarding techniques.
摘要翻译： 提供高效的交换网络组播技术。 来自组播数据包由网络交换机中的中央转发引擎（CFE）进行处理，以生成用于根据分组是特殊组播控制分组还是数据分组对分组进行转发决定的转发索引。 特殊组播控制包的转发由交换机的网络管理处理器（NMP）决定，而数据包则根据传统的桥接转发技术进行转发。
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