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公开(公告)号：US07801061B2
公开(公告)日：2010-09-21
申请号：US11329863
申请日：2006-01-10
IPC分类号： H04L12/28
CPC分类号： H04L12/4625 , H04L45/18 , H04L45/563
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 the restarting network device portion 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即将来临时，由此重新启动的网络设备部分不再可以改变一个或多个端口和这些端口的生成树协议（STP）状态，这些端口和这些端口在该固定状态期间保持在固定状态 重新启动被称为重新启动端口，在预定义条件下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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公开(公告)号：US20090219836A1
公开(公告)日：2009-09-03
申请号：US12040603
申请日：2008-02-29
申请人： TAMEEN KHAN , Ronak Desai
发明人： TAMEEN KHAN , Ronak Desai
IPC分类号： H04L12/28
CPC分类号： H04L12/462 , H04L45/245 , H04L49/552 , Y02D50/30
摘要： In one embodiment, a technique for routing traffic in networks represented by logical topologies, such as Multi Chassis Port Channel (MCPC) or Multi Chassis Ether Channel (MCEC) topologies, is provided. By modifying a port priority vector (PPV) to include an additional “Switch ID” field that identifies a designated bridge ID or a local switch ID, depending on whether the corresponding port is used as an MCT, a routing protocol designed to avoid loops in routing paths, such as STP, may avoid blocking MCT ports.
摘要翻译： 在一个实施例中，提供了一种用于在由诸如多机架端口信道（MCPC）或多机架以太通道（MCEC）拓扑）之类的逻辑拓扑表示的网络中路由业务的技术。 通过修改端口优先级向量（PPV）以包括标识指定的桥ID或本地交换机ID的附加“Switch ID”字段，取决于相应的端口是否用作MCT，设计用于避免环路的路由协议 诸如STP之类的路由路由可以避免阻塞MCT端口。
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公开(公告)号：US20080144533A1
公开(公告)日：2008-06-19
申请号：US11612906
申请日：2006-12-19
申请人： Shekher Bulusu , Ronak Desai
发明人： Shekher Bulusu , Ronak Desai
IPC分类号： H04L12/28
CPC分类号： H04L12/4641 , H04L45/48
摘要： In one embodiment, a solution is provided wherein multiple virtual devices may be configured on the same physical port of a network device. For example, a first virtual device and a second virtual device may be configured to use the same physical port. A single internal spanning tree instance may be configured for both the first virtual device and the second virtual device.
摘要翻译： 在一个实施例中，提供了一种解决方案，其中可以在网络设备的相同物理端口上配置多个虚拟设备。 例如，第一虚拟设备和第二虚拟设备可以被配置为使用相同的物理端口。 可以为第一虚拟设备和第二虚拟设备都配置单个内部生成树实例。
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公开(公告)号：US20070159988A1
公开(公告)日：2007-07-12
申请号：US11329863
申请日：2006-01-10
IPC分类号： H04L12/28
CPC分类号： H04L12/4625 , H04L45/18 , H04L45/563
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 is disclosed. 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 the restarting network device portion 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即将来临时，由此重新启动的网络设备部分不再可以改变一个或多个端口和这些端口的生成树协议（STP）状态，这些端口和这些端口在该固定状态期间保持在固定状态 重新启动被称为重新启动端口，在预定义条件下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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公开(公告)号：US20070159987A1
公开(公告)日：2007-07-12
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 is disclosed. 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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56.发明授权System and method for automated switching of data traffic in a packet network 有权分组网络中数据流量自动切换的系统和方法公开(公告)号：US06882626B1
公开(公告)日：2005-04-19
申请号：US09586662
申请日：2000-06-01
申请人： Madhav V. Marathe , Ronak Desai , Madhu Grandhi
发明人： Madhav V. Marathe , Ronak Desai , Madhu Grandhi
CPC分类号： H04L12/5601 , H04L2012/562 , H04L2012/5627
摘要： A system and method for automated switching of data traffic in a network are described. Data is transmitted along a first virtual circuit among multiple virtual circuits in a network. Next, a failure is detected on the first virtual circuit. As a result, transmission of data is switched from the first virtual circuit to a second virtual circuit among the multiple virtual circuits in the network.
摘要翻译： 描述用于网络中的数据业务的自动切换的系统和方法。 数据沿网络中的多个虚拟电路中的第一虚拟电路传输。 接下来，在第一虚拟电路上检测到故障。 结果，数据的传输在网络中的多个虚拟电路中从第一虚拟电路切换到第二虚拟电路。
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57.发明授权System and method for running a multiple spanning tree protocol with a very large number of domains 有权用于运行具有非常大数量域的多生成树协议的系统和方法公开(公告)号：US08565123B2
公开(公告)日：2013-10-22
申请号：US11416559
申请日：2006-05-03
申请人： Tameen Khan , Ronak Desai , Shekher Bulusu , Francois Edouard Tallet , Norman W. Finn , Munish Mehta
发明人： Tameen Khan , Ronak Desai , Shekher Bulusu , Francois Edouard Tallet , Norman W. Finn , Munish Mehta
IPC分类号： H04L12/28
CPC分类号： H04L12/462 , H04L12/467 , H04L45/48
摘要： A system and method runs a multiple spanning tree protocol (MSTP) in a computer network having a very large number of bridge domains. The computer network includes a plurality of intermediate network devices, each having a plurality of ports for forwarding network messages. Within each device, a plurality of bridge domains are defined, each bridge domain is identified by a Virtual Local Area Network (VLAN) Identifier (VID), and one or more device ports. For each port, a separate mapping of VIDs to Multiple Spanning Tree Instances (MSTIs), based on the bridge domains defined at the port, is established. Each mapping is converted to a port-based configuration digest, which is entered into Spanning Tree Protocol (STP) control messages sent from the respective port. Ports receiving STP control messages whose configuration digest values that match the configuration digests values computed for the ports are said to be in the same Multiple Spanning Tree region. Ports whose configuration digests differ from the configuration digests of received STP control messages are said to be in different regions.
摘要翻译： 系统和方法在具有非常大数量的网桥域的计算机网络中运行多生成树协议（MSTP）。 计算机网络包括多个中间网络设备，每个中间网络设备具有用于转发网络消息的多个端口。 在每个设备中，定义了多个桥接域，每个网桥域由虚拟局域网（VLAN）标识符（VID）和一个或多个设备端口来标识。 对于每个端口，建立基于端口定义的桥接域的VID到多生成树实例（MSTI）的单独映射。 每个映射被转换为基于端口的配置摘要，它被输入到从相应端口发送的生成树协议（STP）控制消息。 接收STP控制消息的端口的配置摘要值与配置摘要值计算的端口称为处于相同的“多生成树”区域。 其配置摘要与接收的STP控制消息的配置摘要不同的端口据说在不同的区域。
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公开(公告)号：US20120051213A1
公开(公告)日：2012-03-01
申请号：US13291638
申请日：2011-11-08
申请人： Saurabh Jain , Tameen Khan , Sanjay Sane , Ronak Desai
发明人： Saurabh Jain , Tameen Khan , Sanjay Sane , Ronak Desai
IPC分类号： H04L12/26
CPC分类号： H04L45/18 , H04L45/04 , H04L45/66 , H04L49/351
摘要： In one embodiment, a first switch is located at a first border between first networks that utilize a STP to detect and break loops and second networks. The first switch is interconnected via the first networks with a second switch located at a second border between the first networks and the second networks. The first switch detects, via a protocol other than STP, addition of a link in the second networks that provides a new path across the second networks between the first switch and the second switch. The first switch blocks data packets from traversing through one or more network boundary ports of the first switch coupled to the first networks, while allowing STP BPDUs to traverse through the one or more network boundary ports, for a period of time sufficient for the first networks to discover the new path using STP.
摘要翻译： 在一个实施例中，第一交换机位于利用STP检测和中断环路和第二网络的第一网络之间的第一边界。 第一交换机经由第一网络与位于第一网络和第二网络之间的第二边界处的第二交换机相互连接。 第一交换机通过除了STP之外的协议来检测在第二网络中添加链路，以在第一交换机和第二交换机之间跨越第二网络提供新的路径。 第一交换机阻止数据分组穿过耦合到第一网络的第一交换机的一个或多个网络边界端口，同时允许STP BPDU跨越一个或多个网络边界端口遍历足够于第一网络的时间段 发现使用STP的新路径。
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公开(公告)号：US08116229B2
公开(公告)日：2012-02-14
申请号：US12033874
申请日：2008-02-19
申请人： Prashanth Pappu , Ronak Desai , Ankur Goyal , Tejas Kokje
发明人： Prashanth Pappu , Ronak Desai , Ankur Goyal , Tejas Kokje
IPC分类号： H04L12/28
摘要： In one embodiment, the convergence node switches of a destination node switch in a network having multiple equal paths between a source switch and destination switch are identified. When a new equal cost path is added to the network, packets are flushed up to the convergence node switch closest to the source switch.
摘要翻译： 在一个实施例中，标识在源交换机和目的地交换机之间具有多个相等路径的网络中的目的地节点交换机的汇聚节点交换机。 当将新的等价路径添加到网络时，数据包将被刷新到最接近源交换机的汇聚节点交换机。
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公开(公告)号：US20110261724A1
公开(公告)日：2011-10-27
申请号：US13178351
申请日：2011-07-07
申请人： Shekher Bulusu , Ronak Desai
发明人： Shekher Bulusu , Ronak Desai
CPC分类号： H04L12/4641 , H04L45/48
摘要： In one embodiment, a solution is provided wherein multiple virtual devices may be configured on the same physical port of a network device. For example, a first virtual device and a second virtual device may be configured to use the same physical port. A single internal spanning tree instance may be configured for both the first virtual device and the second virtual device.
摘要翻译： 在一个实施例中，提供了一种解决方案，其中可以在网络设备的相同物理端口上配置多个虚拟设备。 例如，第一虚拟设备和第二虚拟设备可以被配置为使用相同的物理端口。 可以为第一虚拟设备和第二虚拟设备都配置单个内部生成树实例。
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